Ignition Control - Electrical Diagnostics

DIAGNOSTIC CODE INDEX

DTC                                                                 Description
B2101                                  IGNITION RUN/START INPUT CIRCUIT LOW
B2102                                 IGNITION RUN/START INPUT CIRCUIT HIGH
B210D                                                 BATTERY VOLTAGE LOW
B210E                                                 BATTERY VOLTAGE HIGH
B2142                              IGNITION OFF DRAW (IOD) FUSE NOT PRESENT
B219A             IGNITION UNLOCK RUN/START CONTROL CIRCUIT OVERCURRENT
B219F                                    IGNITION OFF DRAW (IOD) FUSE BLOWN
B2206                                        CURRENT VIN MISSING / MISMATCH
B222C                             VEHICLE CONFIGURATION NOT PROGRAMMED
U0100                                    LOST COMMUNICATION WITH ECM/PCM
U0101                                         LOST COMMUNICATION WITH TCM
U0114               LOST COMMUNICATION WITH FINAL DRIVE CONTROL MODULE
U0121                   LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE
U0151           LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER
U0154           LOST COMMUNICATION WITH OCCUPANT CLASSIFICATION MODULE
U0155                                LOST COMMUNICATION WITH CLUSTER/CCN
U0164                      LOST COMMUNICATION WITH HVAC CONTROL MODULE
U0168         LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE

(SKREEM/WCM)

U0184                                       LOST COMMUNICATION WITH RADIO
U0186                            LOST COMMUNICATION WITH AUDIO AMPLIFIER

IGNITION CONTROL - ELECTRICAL DIAGNOSTICS

B2101-IGNITION RUN/START INPUT CIRCUIT LOW📷 1

⚡ Wiring diagram: Starting Circuit

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition switch on.

Set conditions

 Set Condition:

The WCM/WIN (SKREEM) Module has detected the ignition switch input voltage below a calibrated value.

Possible causes

(F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN
(A106) FUSED B+ SHORTED TO GROUND
IGNITION SWITCH
TIPM

Diagnostic test

1) CHECK FOR ACTIVE DTC

Turn the ignition on.

With a scan tool, read, record and erase TIPM DTCs.

Turn the ignition off for 30 seconds, then back on.

Using the scan tool, read TIPM DTCs.

Does the scan tool display this DTC as active?

Yes

Go To 2) (F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN.

The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform BODY VERIFICATION TEST - VER 1 . 2) (F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN

NOTE: Check the related fuse (TIPM 46) to the (F20) Ignition Switch Output (Run- Start) circuit. If blown, use the wiring diagrams as a guide to make necessary repairs.

Turn the ignition off.

Disconnect the TIPM C7 harness connector.

Turn the ignition on.

Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch output (Run-Start) circuit in the TIPM C7 harness connector.

Does the test light illuminate brightly?

Yes

Replace the TIPM in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .

Repair the (F20) Ignition switch output circuit for an open. Perform BODY VERIFICATION TEST - VER 1 .

B2102-IGNITION RUN/START INPUT CIRCUIT HIGH📷 3

⚡ Wiring diagram: Starting Circuit

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition switch on.

Set conditions

 Set Condition:

The WCM/WIN (SKREEM) Module has detected the ignition switch input voltage above a calibrated value.

Possible causes

(F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT SHORTED TO BATTERY VOLTAGE
WCM/WIN (SKREEM) MODULE

Diagnostic test

1) CHECK FOR ACTIVE DTC

NOTE: Check to make sure the battery and charging system are operating properly. Battery and charging system problems may cause these DTC's to set.

NOTE: Diagnose any related Powertrain DTC(s) before continuing.

Turn the ignition on.

With a scan tool, read, record and erase WCM/WIN (SKREEM) DTC(s).

Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle.

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

Does the scan tool display this DTC as active?

Yes

Go To 2).

Turn the ignition off.

Disconnect the WCM/WIN (SKREEM) harness connector.

Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch Output (Run-Start) circuit in the WCM/WIN (SKREEM) harness connector.

Does the test light illuminate brightly?

Yes

Repair the (F20) Ignition Switch Output (Run-Start) circuit for a short to battery voltage. Perform SKREEM/SKIM VERIFICATION TEST .

Replace and program the WCM/WIN (SKREEM) in accordance with the service information. Perform SKREEM/SKIM VERIFICATION TEST .

B210D-BATTERY VOLTAGE LOW

⚡ Wiring diagram: Charging Circuit

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition on.

Set conditions

 Set Condition:

Battery voltage less than 9 volts for approximately 5 to 6 seconds.

Possible causes

GENERATOR OPERATION
PCM

Diagnostic test

1) CHECK FOR ANY POWERTRAIN CONTROL MODULES DTCS

NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.

NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.

NOTE: Make sure the generator drive belt is in good operating condition.

NOTE: Inspect the fuses in the TIPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.

Turn the ignition on.

With the scan tool, read active PCM DTC's.

Does the scan tool display any active PCM DTC's?

Yes

Refer to appropriate Engine ELECTRICAL DIAGNOSTICS article for the diagnostic test procedure.

Check the above conditions that can cause a low voltage condition. Repair as necessary. Perform BODY VERIFICATION TEST - VER 1 .

B210E-BATTERY VOLTAGE HIGH

⚡ Wiring diagram: Charging Circuit

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition on.

Set conditions

 Set Condition:

Battery voltage greater than 16 volts for approximately 15 seconds.

Possible causes

GENERATOR
PCM

Diagnostic test

1) CHECK FOR ANY POWERTRAIN CONTROL MODULES DTCS

NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.

NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.

NOTE: Make sure the generator drive belt is in good operating condition.

NOTE: Inspect the fuses in the TIPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.

Turn the ignition on.

With the scan tool, read active PCM DTC's.

Does the scan tool display any active PCM DTC's?

Yes

Refer to appropriate Engine ELECTRICAL DIAGNOSTICS article for the diagnostic test procedure.

Check the above conditions that can cause a high voltage condition. Repair as necessary. Perform BODY VERIFICATION TEST - VER 1 .

B2142-IGNITION OFF DRAW (IOD) FUSE NOT PRESENT

⚡ Wiring diagram: Power Distribution Circuit (1 of 3)

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the Ignition on. This DTC will set only if vehicle has less that 50 miles on it. After 50 miles, DTC B219F will set.

Set conditions

 Set Condition:

IOD Fuse not installed in the TIPM.

Possible causes

IOD FUSE

Diagnostic test

1) CHECK FOR ACTIVE DTC

With the scan tool, record and erase DTC's.

Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes

Go To 2).

Verify IOD Fuse installed in TIPM

Is IOD Fuse present?

Yes

Go To 3).

Install the IOD Fuse. Perform BODY VERIFICATION TEST - VER 1 . 3) IOD FUSE BLOWN CHECK

Is IOD Fuse blown?

Yes

Replace the IOD Fuse. Perform BODY VERIFICATION TEST - VER 1 .

Test complete.

B219A-IGNITION UNLOCK RUN/START CONTROL CIRCUIT OVERCURRENT📷 1

⚡ Wiring diagram: Starting Circuit

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition on.

Set conditions

 Set Condition:

Over current condition detected on the (F1) Fused Ignition Switch Output (Run-Start) circuit.

Possible causes

TERMINAL DAMAGE OR CORROSION
HIGH RESISTANCE ON THE (F1) IGNITION SWITCH OUTPUT (UNLOCK-RUN-START)
CIRCUIT
TIPM

Diagnostic test

1) CHECK FOR ACTIVE DTC

With the scan tool, record and erase DTC's.

Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes

Go To 2).

If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. 2) INSPECT THE TIPM, PCM, AND SHIFT LEVER ASSEMBLY (NAG1) TERMINALS & WIRE HARNESS FOR A CONDITION CAUSING HIGH CIRCUIT RESISTANCE

Turn the ignition off.

Disconnect the TIPM C1 harness connector.

Disconnect the PCM C1 harness connector.

Disconnect the Shift Lever Assembly (NAG1) harness connector

Inspect the connector terminals for signs of corrosion build up and damage.

Visually inspect the wiring harness for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

Were any of the above conditions found?

Yes

Repair as necessary. Perform BODY VERIFICATION TEST - VER 1 .

Replace the TIPM in accordance with the service information Perform BODY VERIFICATION TEST - VER 1 .

B219F-IGNITION OFF DRAW (IOD) FUSE BLOWN

⚡ Wiring diagram: Power Distribution Circuit (1 of 3)

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition on. This DTC will only set if vehicle has over 50 miles on it.

Set conditions

 Set Condition:

IOD Fuse not installed or blown.

Possible causes

IOD FUSE NOT INSTALLED
IOD FUSE BLOWN

Diagnostic test

1) CHECK FOR ACTIVE DTC

With the scan tool, record and erase DTC's.

Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes

Go To 2).

Verify IOD Fuse installed in TIPM.

Is IOD Fuse present?

Yes

Go To 3).

Replace the IOD Fuse. Perform BODY VERIFICATION TEST - VER 1 . 3) IOD FUSE BLOWN

Verify IOD Fuse is blown.

Is IOD Fuse blown?

Yes

Using the wiring diagrams, diagnose for a short to ground condition. Perform BODY VERIFICATION TEST - VER 1 .

Test complete.

B2206-CURRENT VIN MISSING / MISMATCH

⚡ Wiring diagram: Body Control Modules Circuit (1 of 2)

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

With the ignition on.

Set conditions

 Set Condition:

A PCM from another vehicle has been installed in the vehicle.

Possible causes

PCM FROM ANOTHER VEHICLE INSTALLED

Diagnostic test

1) PCM FROM ANOTHER VEHICLE INSTALLED

NOTE: This DTC is set when a PCM from another vehicle is installed into the current vehicle.

Has another PCM been installed?

Yes

Replace the PCM in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .

Go To 2). 2) OTHER CAN-C MODULES SET VIN MISMATCH

Is VIN Mismatch DTC set in other CAN-C modules?

Yes

Replace the PCM in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .

Replace the TIPM in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .

B222C-VEHICLE CONFIGURATION NOT PROGRAMMED

⚡ Wiring diagram: Body Control Modules Circuit (1 of 2)

Additional wiring

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.

When monitored

Continuously

Set conditions

 Set Condition:

The TIPM is not configured for the vehicle.

Possible causes

TIPM

Diagnostic test

1) CHECK FOR ACTIVE DTC

Turn the ignition on.

With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

Go To 2).

Test complete. 2) ACTIVE TIPM DTC

Cycle the ignition from off to run remaining in run.

With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

Go To 3).

Test complete. 3) VIN MISMATCH DTC PRESENT

Turn the ignition on.

With the scan tool, read DTCs.

Is DTC: B2206-CURRENT VIN MISSING / MISMATCH also active?

Yes

Refer to repair procedure for DTC B2206-CURRENT VIN MISSING / MISMATCH.

Replace the TIPM in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .

U0100-LOST COMMUNICATION WITH ECM/PCM

⚡ Wiring diagram: Computer Data Lines Circuit (1 of 2)