TiresWheels - Electrical Diagnosis

DIAGNOSTIC CODE INDEX

DTC                                                               Description
C0077                                                    LOW TIRE PRESSURE
C1501                                      TIRE PRESSURE SENSOR 1 INTERNAL
C1502                                      TIRE PRESSURE SENSOR 2 INTERNAL
C1503                                      TIRE PRESSURE SENSOR 3 INTERNAL
C1504                                      TIRE PRESSURE SENSOR 4 INTERNAL
C1506               LEFT FRONT TIRE PRESSURE TRIGGER MODULE PERFORMANCE
C1507              RIGHT FRONT TIRE PRESSURE TRIGGER MODULE PERFORMANCE
C1508                LEFT REAR TIRE PRESSURE TRIGGER MODULE PERFORMANCE
C150A               LEFT FRONT TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH
C150B              RIGHT FRONT TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH
C150C                LEFT REAR TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH
C151D                        TIRE PRESSURE SENSOR LOCATION UNDETERMINED
U1114           LOST COMMUNICATION WITH LEFT FRONT TIRE PRESSURE TRIGGER

MODULE U1115 LOST COMMUNICATION WITH RIGHT FRONT TIRE PRESSURE TRIGGER MODULE U1116 LOST COMMUNICATION WITH LEFT REAR TIRE PRESSURE TRIGGER MODULE

TIRE PRESSURE MONITORING - ELECTRICAL DIAGNOSIS

C0077-LOW TIRE PRESSURE

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

When monitored

Continuously.

Set conditions

 Set Condition:

A low pressure condition will exist when the tire pressure falls below or is equal to the low pressure threshold value as specified for the vehicle.

Possible causes

INTERMITTENT PERFORMANCE DTC
INCORRECT TIRE PRESSURE
TIRE PRESSURE SENSOR
WCM (SKREEM)

Diagnostic test

DTC STATUS

NOTE

If the incorrect Placard Values were programmed into the WCM/SKREEM, a DTC could be set. Before continuing with any TPM diagnostic test, using the scan tool, check that the correct Placard Values have been programmed in to the module.

NOTE

If the following conditions are present:

- Low Tire Pressure DTC - Tire Pressure Sensor Internal DTC - Spare Tire is not equipped with a Tire Pressure Sensor - Spare Tire is currently on the vehicle Repair the tire and place it back on the vehicle. Test drive the vehicle. Turn the ignition on. Is the TPM telltale lamp/Low pressure EVIC message on at this time?

Yes Go to 2.

No Go to 5.

LOW TIRE PRESSURE

NOTE

The DTC can be caused by many different factors and might not be a sensor/transmitter or a WCM (SKREEM) fault. Interference from other elements will over power the sensor/transmitter RF frequency making erratic operation to the TPM system. Check the vehicle for aftermarket accessories that could compromise the RF frequency signal before diagnosing the TPM system.

NOTE

Seasonal temperature changes will affect tire pressure, and may have caused the tire pressure to fall below the low pressure warning threshold. Tire pressure should always be set based on cold inflation tire pressure (placard). This is defined as the tire pressure after a vehicle has not been driven for more then 3 hours, and in outside ambient temperatures.

Correct all tire pressure to the recommended specifications and wait 2 minutes. Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h. (24 km/h). Use a TPM-RKE Analyzer tool 9936 to scan each tire pressure sensor, and make sure the Sensor IDs matches what is programmed into the WCM. The Sensor Identifications are located under "Data Display" for the "WCM Wireless Control Module". If the sensor IDs does not match, following the programming steps outlined in the diagnostic scan tool for "Program Tire Sensor ID w/TPM Tool" under "Miscellaneous Functions" for the "WCM/Wireless Control Module" menu item.

NOTE

When scanning a sensor with a TPM-RKE Analyzer 9936 , replace the TPM sensor if the results show a "Damaged Accel", "Damaged Temp", or "Damaged Press".

Is the TPM telltale lamp/Low pressure EVIC message on at this time?

Yes Go to 3.

No Test Complete.

TIRE PRESSURE SENSOR

NOTE

Before continuing, ensure the tire is free from any leaks or damage that would cause a low tire pressure condition. If a problem is found, repair as necessary and retest.

With the scan tool, go under "Data Display" for the "WCM Wireless Control Module" and find the compensated tire pressure values. Located underneath each Sensor Identification locations. If any compensated tire pressure values are equal or lower then the Tire Low Pressure Threshold. The corresponding TPM sensor needs to be located and replaced.

NOTE

The following tests are used to locate the Tire Pressure Sensor/Transmitter that is setting the low pressure fault. If the tires have been rotated, the Tire Pressure Sensor/Transmitter are no longer in sequence from the factory. Faults are linked to the sensor/transmitter IDs. You MUST locate the correct Tire Pressure Sensor/Transmitter that set the fault before continuing. Use one or more of the following methods below.

METHOD 1: Use a TPM-RKE Analyzer tool 9936 to scan each tire pressure sensor. If a suspected sensor has been located, lower the tire pressure to 20 PSI, wait for 2 minutes, and check the scan tool for changes to any compensated tire pressure values. If there was a pressure change to any compensated tire pressure values, check to make sure that the TPM- RKE Analyzer is set correctly, and repeat the process on each wheel on the vehicle until the faulty Sensor/Transmitter has been identified.

NOTE

When scanning a sensor with a TPM-RKE Analyzer 9936 , replace the TPM sensor if the results show a "Damaged Accel", "Damaged Temp", or "Damaged Press".

METHOD 2: Starting with the left front wheel, deflate the tire to 20 PSI, wait 2 minutes, and check the scan tool for changes to any compensated tire pressure values. If there was a pressure change to any compensated tire pressure value, repeat this process on each wheel on the vehicle until the faulty Sensor/Transmitter has been identified. Has the malfunctioning/faulty TPM sensor been located?

Yes Replace the Tire Pressure sensor. Perform TPM VERIFICATION.

No Go To 4.

WIRELESS CONTROL MODULE

Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. With the scan tool, read WCM/SKREEM DTC(s). Drive the vehicle for a minimum of 10 minutes while maintaining a continuous speed above 15 mph (24 km/h). During this time the system will learn the sensor IDs. Are there any DTC(s) present?

Yes Repair not complete, refer to the appropriate symptom. Perform TPM VERIFICATION.

No Repair is complete.

INTERMITTENT TIRE PRESSURE SENSOR DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h. (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Repair as necessary. Perform TPM VERIFICATION.

No Test complete.

C1501-TIRE PRESSURE SENSOR 1 INTERNAL

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

Theory of operation

The tire pressure sensor actively monitors the air pressure and air temperature inside the tire, the sensor internal battery status, and the radial acceleration of the wheel. Each sensor has a unique ID code. The sensor transmits the data at regular intervals via an encoded signal to a receiver circuit located in the Wireless Control Module

(SKREEM).

When monitored

With vehicle speed greater than 15 MPH (24 km/h).

Set conditions

 Set Condition:

The WCM (SKREEM) will monitor the signals from the four active road tire sensors. A loss of signal error is detected when eight consecutive blocks of data are not received or cannot be accurately decoded within a maximum period of 10 minutes. An internal sensor hardware error condition will be set when an error in the accelerometer, pressure sensor, or temperature sensor is detected.

Possible causes

WRONG SENSOR
TEMPORARY SPARE TIRE IN USE
OUTSIDE INTERFERENCE
TIRE PRESSURE SENSOR
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

NOTE

If the following conditions are present:

- Tire Pressure Sensor Internal DTC (Active) - Spare Tire is not equipped with a Tire Pressure Sensor - Spare Tire is currently on the vehicle Repair the tire and place it back on the vehicle. Test drive the vehicle. If the DTC(s) reset continue with the diagnostic procedure. Turn the ignition on. With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 4.

TIRE PRESSURE SENSOR

NOTE

When working with vehicles equipped with the base tire pressure monitoring system the correct tire that set the fault must be identified. Following the below procedure will help in identifying the correct tire.

Set all tire pressures to the recommended specifications and recheck

for fault/alert.

Turn the ignition on.

Starting with the left front wheel, deflate the tire to 20 PSI and wait 2

minutes. The fault will set once the pressure has reached 20 PSI within the 2 minute time frame.

If the TPM fault was detected and not associated to this

Sensor/Transmitter, repeat the process until the faulty Sensor/Transmitter has been identified. Once a fault/alert has set, it will establish the location of the tire pressure sensor/transmitter. Repeat steps until the applicable Tire Pressure Sensor/Transmitter has been located. Turn the ignition off. Replace the Tire Pressure Sensor in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE SENSOR DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the beginning of this test and perform the diagnostic procedure as necessary.

No Test complete. Perform TPM VERIFICATION.

C1502-TIRE PRESSURE SENSOR 2 INTERNAL

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

(SKREEM).

When monitored

With vehicle speed greater than 15 MPH (24 km/h).

Set conditions

 Set Condition:

Possible causes

INTERMITTENT TIRE PRESSURE SENSOR INTERNAL DTC
SPARE TIRE IN USE
TIRE PRESSURE SENSOR
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

NOTE

If the following conditions are present:

Yes Go to 2.

No Go to 4.

TIRE PRESSURE SENSOR

NOTE

Set all tire pressures to the recommended specifications and recheck

for fault/alert.

Turn the ignition on.

Starting with the left front wheel, deflate the tire to 20 PSI and wait 2

minutes. The fault will set once the pressure has reached 20 PSI within the 2 minute time frame.

If the TPM fault was detected and not associated to this

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE SENSOR DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the beginning of this test and perform the diagnostic procedure as necessary.

No Test complete. Perform TPM VERIFICATION.

C1503-TIRE PRESSURE SENSOR 3 INTERNAL

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

(SKREEM).

When monitored

With vehicle speed greater than 15 MPH (24 km/h).

Set conditions

 Set Condition:

Possible causes

INTERMITTENT TIRE PRESSURE SENSOR INTERNAL DTC
SPARE TIRE IN USE
TIRE PRESSURE SENSOR
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

NOTE

If the following conditions are present:

Yes Go to 2.

No Go to 4.

TIRE PRESSURE SENSOR

NOTE

Set all tire pressures to the recommended specifications and recheck

for fault/alert.

Turn the ignition on.

Starting with the left front wheel, deflate the tire to 20 PSI and wait 2

minutes. The fault will set once the pressure has reached 20 PSI within the 2 minute time frame.

If the TPM fault was detected and not associated to this

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE SENSOR DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the beginning of this test and perform the diagnostic procedure as necessary.

No Test complete. Perform TPM VERIFICATION.

C1504-TIRE PRESSURE SENSOR 4 INTERNAL

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

(SKREEM).

When monitored

With vehicle speed greater than 15 m.p.h. (24 km/h).

Set conditions

 Set Condition:

Possible causes

INTERMITTENT TIRE PRESSURE SENSOR INTERNAL DTC
SPARE TIRE IN USE
TIRE PRESSURE SENSOR
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

NOTE

If the following conditions are present:

Yes Go to 2.

No Go to 4.

TIRE PRESSURE SENSOR

NOTE

Set all tire pressures to the recommended specifications and recheck

for fault/alert.

Turn the ignition on.

Starting with the left front wheel, deflate the tire to 20 PSI and wait 2

minutes. The fault will set once the pressure has reached 20 PSI within the 2 minute time frame.

If the TPM fault was detected and not associated to this

Sensor/Transmitter, repeat the process until the faulty Sensor/Transmitter has been identified. Once a fault/alert has set, it will establish the location of the tire pressure sensor/transmitter. Repeat steps until the applicable Tire Pressure Sensor/Transmitter has been located. Turn the ignition off. Replace the Tire Pressure Sensor in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h. With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE SENSOR DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the beginning of this test and perform the diagnostic procedure as necessary.

No Test complete. Perform TPM VERIFICATION.

C1506-LEFT FRONT TIRE PRESSURE TRIGGER MODULE PERFORMANCE📷 1

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (TPM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

The WCM (TPM) will monitor the messages from each Tire Pressure Trigger Module over the LIN bus. If any of the messages are not received, or are received other than as expected, a DTC will set. When the condition is corrected, or is no longer detected, as acknowledged via a LIN bus message, the WCM will reset the appropriate trigger module fault status.

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (TPM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on. With the scan tool, select View DTCs in the Wireless Control Module (TPM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 4.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (TPM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (TPM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (TPM)

View repair. Repair Replace the Wireless Control Module (TPM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Using the wiring schematic as a guide, inspect the wiring and connectors relative to this circuit. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (TPM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (TPM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C1507-RIGHT FRONT TIRE PRESSURE TRIGGER MODULE PERFORMANCE📷 1

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

The WCM (SKREEM) will monitor the messages from each Tire Pressure Trigger Module over the LIN bus. If any of the messages are not received, or are received other than as expected, a DTC will set. When the condition is corrected, or is no longer detected, as acknowledged via a LIN bus message, the WCM will reset the appropriate trigger module fault status.

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on. With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 4.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Using the wiring schematic as a guide, inspect the wiring and connectors relative to this circuit. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C1508-LEFT REAR TIRE PRESSURE TRIGGER MODULE PERFORMANCE📷 1

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a LR transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on. With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 4.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 3.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Using the wiring schematic as a guide, inspect the wiring and connectors relative to this circuit. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C150A-LEFT FRONT TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH📷 3

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

The WCM receives a message from the Tire Pressure Trigger Module indicating that an over voltage condition has been detected.

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z907) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on.

NOTE

If a system or battery voltage high DTC is set in the Wireless Control Module (SKREEM) or in the PCM, repair the voltage DTC before continuing with this test.

With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 6.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition on. Using a 12-volt test light connect to ground, check the (F943) Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(Z907) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to 12 volts, check each of the (Z907) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 4.

No Repair the (Z907) Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 5.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C150B-RIGHT FRONT TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH📷 3

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

The WCM receives a message from the Tire Pressure Trigger Module indicating that an over voltage condition has been detected.

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z908) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on.

NOTE

If a system or battery voltage high DTC is set in the Wireless Control Module (SKREEM) or in the PCM, repair the voltage DTC before continuing with this test.

With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 6.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition on. Using a 12-volt test light connect to ground, check the (F943) Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(Z908) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to 12 volts, check each of the (Z908) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 4.

No Repair the (Z908) Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 5.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C150C-LEFT REAR TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH📷 3

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.

When monitored

Continuously.

Set conditions

 Set Condition:

The WCM receives a message from the Tire Pressure Trigger Module indicating that an over voltage condition has been detected.

Possible causes

INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z919) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
TIRE PRESSURE TRIGGER MODULE
WIRELESS CONTROL MODULE (SKREEM)

Diagnostic test

DTC STATUS IS ACTIVE

Turn the ignition on.

NOTE

If a system or battery voltage high DTC is set in the Wireless Control Module (SKREEM) or in the PCM, repair the voltage DTC before continuing with this test.

With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Is the DTC status Active at this time?

Yes Go to 2.

No Go to 6.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition on. Using a 12-volt test light connect to ground, check the (F943) Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(Z919) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to 12 volts, check each of the (Z919) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 4.

No Repair the (Z919) Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Go to 5.

No Test Complete. Perform TPM VERIFICATION.

WIRELESS CONTROL MODULE (SKREEM)

View repair. Repair Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present at this time. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h). With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Does the DTC reset or is the status Active for this DTC?

Yes Return to the first step of this test and perform the diagnostic procedure.

No Test complete. Perform TPM VERIFICATION.

C151D-TIRE PRESSURE SENSOR LOCATION UNDETERMINED📷 5

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

The vehicle sensor locate process occurs after the vehicle sits at zero speed for more than 19 min. The tire pressure monitor system will determine the sensor positions while driving at speeds above 15 MPH (24 Km/h). This process can take up to 10 min. to determine sensor positions.

When monitored

During vehicle sensor locate process.

Set conditions

 Set Condition:

Must fail vehicle sensor locate process 3 times in a row.

Possible causes

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE
FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN
TIRE PRESSURE TRIGGER MODULE POWER AND GROUND
TPM SENSOR
WCM

Diagnostic test

OTHER DTC'S SET

Repair all other DTC's first. Is this DTC still active after all other DTC's repaired?

Yes Go To 2.

No Test Complete. Perform TPM VERIFICATION.

VERIFY DTC IS ACTIVE

NOTE

Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

Turn the ignition on. With the scan tool, read and record WCM DTCs. With the scan tool, erase WCM DTCs. Cycle the ignition switch. With the scan tool, read WCM DTCs. Does this DTC reset?

Yes Go To 3.

No Perform the Stored Lost Communication test procedure. Refer to DIAGNOSIS AND TESTING . Perform BODY VERIFICATION TEST - VER 1 .

(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN

Turn the ignition off. Disconnect the Tire Pressure Trigger Module. Disconnect the WCM. With an ohmmeter measure the resistance of the (D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT. Is the resistance below 5 Ohms?

Yes Go To 4.

No Repair or replace the open circuit. Perform TPM VERIFICATION.

FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition off. Disconnect the Tire Pressure Transponder harness connector. Disconnect the Sentry Key Remote Entry Module harness connector. Turn the ignition on. Using a 12-volt test light connect to ground, check the Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 5.

No Repair the Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to battery voltage, probe each of the Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes Go to 6.

No Repair the Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE

Turn the ignition on. Measure the voltage of the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is there any voltage present?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage.

No Go to 7. Perform TPM VERIFICATION.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND

Turn the ignition off. Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is the resistance below 5.0 ohms?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground. Perform TPM VERIFICATION.

No Go to 8.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH

RESISTANCE Use a jumper wire with one end connected to ground and the other to the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the Front Left Pressure Tire Transponder harness connector. Using a 12-Volt test light connected to battery voltage, probe the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the TPM harness connector.

NOTE

The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate bright?

Yes Go to 9.

No Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

POWER AND GROUND CIRCUIT OPEN

Turn the ignition on. With a voltmeter measure the voltage between the power and ground circuit at the Trigger Module. Is the voltage at least the same as battery voltage?

Yes Go To 10.

No Repair the open circuit. Perform TPM VERIFICATION.

CHECK FOR ADDITIONAL TRIGGER MODULE COMMUNICATION RELATED DTCs

With the scan tool, select Network View and select Advanced. Is there more than one module with active DTCs "Logged Against" the WCM?

Yes Replace/update the WCM in accordance with the service information. Perform TPM VERIFICATION.

No Replace the Tire pressure trigger Module in accordance with the service information. Perform TPM VERIFICATION.

U1114-LOST COMMUNICATION WITH LEFT FRONT TIRE PRESSURE TRIGGER MODULE📷 6

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

When monitored

With the ignition on Battery voltage between 10 and 16 volts IOD fuse installed

Set conditions

 Set Condition:

If the WCM fails to receive bus messages from the Tire pressure trigger module for two consecutive counts of trigger module not responding to a communication check.

Possible causes

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z907) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN
TIRE PRESSURE TRIGGER MODULE POWER AND GROUND
WCM

Diagnostic test

DTC STATUS

Ensure every trigger module connector is connected and WCM connected. Turn the ignition on. With the scan tool, run the "Trigger Module Test Routine" under "Miscellaneous Functions" for the "WCM" and follow the procedure.

NOTE

Three trigger modules are located in three of the four wheel wells on the vehicle to provide the WCM/SKREEM with the location of the tire pressure sensors on the vehicle. A fourth transponder is not necessary in the remaining wheel well due to the process-of-elimination theory. Once the system knows the location of the first three sensors it assumes the location of the fourth tire pressure sensor. The locations of the trigger modules can vary for each vehicle. Make sure the vehicle has trigger modules, and that are in the right locations. After every repair, the trigger module test routine must be rerun in order to verify the fix.

Did the Left Front Trigger Module have NO as a result?

Yes Go To 2.

No Repair intermittent condition.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition off. Disconnect the Tire Pressure Transponder harness connector. Turn the ignition on. Using a 12-volt test light connect to ground, check the (F943) Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(Z907) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to battery voltage, probe each of the (Z907) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes Go to 4.

No Repair the (Z907) Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE

Turn the ignition off. Disconnect both tire pressure transponder harness connectors. Turn the ignition on. Measure the voltage of the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is there any voltage present?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage. Perform TPM VERIFICATION.

No Go to 5.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND

Turn the ignition off. Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is the resistance below 5.0 ohms?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground. Perform TPM VERIFICATION.

No Go to 6.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH

RESISTANCE Use a jumper wire with one end connected to ground and the other to the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the WCM/SKREEM harness connector. Using a 12-Volt test light connected to battery voltage, probe the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the TPM harness connector.

NOTE

The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate bright?

Yes Go to 7.

No Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

TIRE PRESSURE TRIGGER MODULE

Turn the ignition off. Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information. With the scan tool, run the "Trigger Module Test Routine" under "Miscellaneous Functions" for the "WCM" and follow the procedure. Did the Left Front Trigger Module have NO as a result?

Yes Go To 8.

No Go To 9.

WIRELESS CONTROL MODULE (SKREEM)

Replace the Wireless Control Module (SKREEM) in accordance with the Service Information. Drive the vehicle for a minimum of 10 minutes while maintaining a continuous speed above 15 mph (24 km/h). During this time the system will learn the sensor IDs. With the scan tool, read WCM/SKREEM DTC(s). Are there any DTC(s) present?

Yes Repair not complete, refer to the appropriate DTC.

No Repair complete. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

The conditions necessary to set this DTC are not present or has been corrected. Refer to any Technical Service Bulletins that may apply to this condition. With the scan tool, clear DTCs in the Wireless Control Module (SKREEM). Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h. With the scan tool, select View DTCs in the Wireless Control Module (SKREEM). Are there any DTC(s) present?

Yes Repair not complete, refer to the appropriate DTC. Perform TPM VERIFICATION.

No Test complete. Perform TPM VERIFICATION.

U1115-LOST COMMUNICATION WITH RIGHT FRONT TIRE PRESSURE TRIGGER MODULE📷 6

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

When monitored

With the ignition on Battery voltage between 10 and 16 volts IOD fuse installed

Set conditions

 Set Condition:

If the WCM fails to receive bus messages from the Tire pressure trigger module for two consecutive counts of trigger module not responding to a communication check.

Possible causes

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z908) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN
TIRE PRESSURE TRIGGER MODULE POWER AND GROUND
WCM

Diagnostic test

DTC STATUS

NOTE

Did the Right Front Trigger Module have NO as a result?

Yes Go To 2.

No Repair intermittent condition.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(Z908) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to battery voltage, probe each of the (Z908) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes Go to 4.

No Repair the (Z908) Ground circuit(s) for an open circuit or high resistance.

Perform TPM VERIFICATION.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage. Perform TPM VERIFICATION.

No Go to 5.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND

Turn the ignition off. Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is the resistance below 5.0 ohms?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground. Perform TPM VERIFICATION.

No Go to 6.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH

NOTE

The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate bright?

Yes Go to 7.

No Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

TIRE PRESSURE TRIGGER MODULE

Yes Go To 8.

No Go To 9.

WIRELESS CONTROL MODULE (SKREEM)

Yes Repair not complete, refer to the appropriate DTC.

No Repair complete. Perform TPM VERIFICATION.

INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC

Yes Repair not complete, refer to the appropriate DTC. Perform TPM VERIFICATION.

No Test complete. Perform TPM VERIFICATION.

U1116-LOST COMMUNICATION WITH LEFT REAR TIRE PRESSURE TRIGGER MODULE📷 6

⚡ Wiring diagram: Tire Pressure Monitoring Circuit

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

When monitored

With the ignition on Battery voltage between 10 and 16 volts IOD fuse installed

Set conditions

 Set Condition:

If the WCM fails to receive bus messages from the Tire pressure trigger module for two consecutive counts of trigger module not responding to a communication check.

Possible causes

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND
(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE
(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
(Z919) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN
TIRE PRESSURE TRIGGER MODULE POWER AND GROUND
WCM

Diagnostic test

DTC STATUS

Ensure every trigger module connector is connected. Turn the ignition on. With the scan tool, run the "Trigger Module Test Routine" under "Miscellaneous Functions" for the "WCM" and follow the procedure.

NOTE

Did the Left Rear Trigger Module have NO as a result?

Yes Go To 2.

No Repair intermittent condition.

(F943) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE

Turn the ignition on. Using a 12-volt test light connect to ground, check the (F943) Fused Ignition Switch Output (Run) circuit.

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 3.

No Repair the (F943) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.

Perform TPM VERIFICATION.

(Z919) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

Using a 12-volt test light connect to 12 volts, check each of the (Z919) Ground circuit(s).

NOTE

The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes Go to 4.

No Repair the (Z919) Ground circuit(s) for an open circuit or high resistance. Perform TPM VERIFICATION.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE

Turn the ignition off. Disconnect all three tire pressure transponder harness connectors. Disconnect the Sentry Key Remote Entry Module harness connector. Turn the ignition on. Measure the voltage of the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is there any voltage present?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage. Perform TPM VERIFICATION.

No Go to 5.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND

Turn the ignition off. Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit. Is the resistance below 5.0 ohms?

Yes Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground. Perform TPM VERIFICATION.

No Go to 6.

(D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH

NOTE

The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate bright?

Yes Go to 7.

No Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance. Perform TPM VERIFICATION.

(D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN

Yes Go To 8.

No Repair or replace the open circuit. Perform TPM VERIFICATION.

POWER AND GROUND CIRCUIT OPEN

Turn the ignition on. With a voltmeter measure the voltage between the power and ground circuit at the Trigger Module. Is the voltage at least the same as battery voltage?

Yes Go To 9.

No Repair the open circuit. Perform TPM VERIFICATION.

CHECK FOR ADDITIONAL TRIGGER MODULE COMMUNICATION RELATED DTCs

With the scan tool, select Network View and select Advanced. Is there more than one module with active DTCs "Logged Against" the WCM?

Yes Replace/update the WCM in accordance with the service information. Perform TPM VERIFICATION.

No Replace the Tire pressure trigger Module in accordance with the service information. Perform TPM VERIFICATION.

*STORED LOST COMMUNICATION DTCS

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

When monitored

With the ignition on.

Battery voltage between 10 and 16 volts.

IOD fuse installed.

TIPM is configured correctly.

Set conditions

 Set Condition:

Bus messages not received for approximately 2 to 5 seconds.

Possible causes

CAN B BUS CIRCUITS OPEN OR SHORTED
CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TIPM NOT CONFIGURED CORRECTLY
POWER OR GROUND FROM THE REPORTING MODULE
MODULE THAT SET THIS DTC
PREVIOUS SERVICE PERFORMED WITHIN THE LAST 100 KEY CYCLES (FUSE/RELAYS
REMOVED, WIRING SERVICE, BATTERY DISCONNECT)
LOW BATTERY/JUMP START CONDITION
IOD FUSE WAS REMOVED DURING SHIPPING
CHECK FOR RELATED TSB'S

Diagnostic test

VERIFY DTC IS STORED

NOTE

Stored faults may indicate a customer perceived intermittent condition.

NOTE

Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

NOTE

Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

With the scan tool, read stored DTC's. Is this DTC stored?

Yes Go To step 2.

No Diagnose the active DTC. Refer to DIAGNOSTIC CODE INDEX for a list of the symptoms.

CHECK THE ENVIRONMENTAL DATA

With the scan tool, read the loss of communication environmental data. Does the loss of communication environmental odometer data match up to any of the previous service procedures listed in the possible causes or are there any stored CAN B or C hardware electrical, battery, ignition voltage, VIN missing/mismatch, TIPM configuration DTC's present with matching environmental data?

Yes These DTC's may have been the result of other service procedures performed. Clear DTC's.

No Go To step 3.

VERIFY INTERMITTENT LOST COMMUNICATION DTC - WIRING CONCERNS

Turn the ignition on. With the scan tool, select Network View and select Advanced. Is there more than one ECU with stored DTC's "Logged Against" the module and one or more lost communication DTC's stored in the offending module?

Yes Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals. Repair as necessary.

No Go To step 4.

VERIFY INTERMITTENT LOST COMMUNICATION DTC - OFFENDING MODULE

Turn the ignition on. With the scan tool, select Network View and select Advanced. Is there more than one ECU with stored DTC's "Logged Against" the module and NO lost communication DTC's stored in the offending module?

Yes Check for TSB(s) related to this offending module.

No Go To step 5.

VERIFY INTERMITTENT LOST COMMUNICATION DTC - REPORTING MODULE

Turn the ignition on. With the scan tool, select Network View and select Advanced. Is there ONLY ONE ECU with stored DTC's "Logged Against" the module?

Yes Check for TSB(s) related to the module that set this DTC.

No Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals. Repair as necessary.

Standard procedure

TPM VERIFICATION

Additional wiring

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

Diagnostic test

TPM

Was the WCM/SKREEM replaced during the test procedure?

Yes Go to step 2.

No Go to step 3.

WCM/SKREEM

NOTE

When entering the PIN, care should be taken because the SKREEM will only allow three consecutive attempts to enter the correct PIN. If three consecutive incorrect PIN's are entered the SKREEM will Lock Out the scan tool. To exit Lock Mode, the ignition key must remain in the Run position for one hour. All accessories must be off. A battery charger connected to the battery during this time period is recommended.

Reconnect the previously removed and/or disconnected components and connectors.

Obtain the vehicle's unique Personal Identification Number (PIN) assigned to its original

SKREEM. This number can be obtained from the vehicle invoice or from the Chrysler Customer Center (Phone 1-800-992-1997).

With the scan tool, select Miscellaneous Functions, WCM/Wireless Control Module. Then select

the desired procedure and follow the display on the scan tool.

If the WCM/SKREEM was replaced, all the customer's keys must be programmed to the new

module. Use the scan tool and the Program Key procedure

With the scan tool, erase all DTCs. Perform 5 ignition key cycles, leaving the key on for at least 90

seconds per cycle.

Drive the vehicle for a minimum of 10 minutes while maintaining a continuous speed above 15

mph (24 km/h). During this time the system will learn the new sensor ID code and will clear any DTC(s) automatically.

With the scan tool, read WCM/SKREEM DTC(s).

Are there any DTC(s) present?

Yes Repair not complete, refer to the appropriate symptom.

No Repair is complete.

WIRE REPAIR

Was the repair a wire repair?

Yes Go To step 5.

No Go To step 4.

TIRE PRESSURE SENSOR/TIRE PRESSURE TRANSPONDER REPLACE

Reconnect the previously removed and/or disconnected components and connectors.

If available, use a TPM-RKE Analyzer tool with the Scan Tool to program the WCM/SKREEM

with the tire pressure sensors ID's on the vehicle, or perform step 3.

Drive the vehicle for a minimum of 10 minutes while maintaining a continuous speed above 15

mph (24 km/h). During this time the system will learn the new sensor ID's.

With the scan tool, read TPM DTC(s).

Are there any DTC(s) present?

Yes Repair not complete, refer to the appropriate symptom.

No Repair is complete.

WIRE REPAIR

Ensure every trigger module connector is connected and WCM is connected. Turn the ignition on. With the scan tool, run the "Trigger Module Test Routine" under "Miscellaneous Functions" for the "WCM" and follow the procedure.

NOTE

Did any of the three Trigger Modules have NO as a result?

Yes Return to the DTC test.

No Repair complete.