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LampsLighting - Interior - Electrical Diagnostics

Factory FSM · 5 topics
DIAGNOSTIC CODE INDEX
DTC                                                                      Description
B161A                                           COURTESY/DOME LAMP CONTROL CIRCUIT
B161E                                                 READING LAMP CONTROL CIRCUIT
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
B161A-COURTESY/DOME LAMP CONTROL CIRCUIT📷 1
⚡ Wiring diagram: Interior Lights Circuit

Additional wiring

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

When monitored

Continuously

Set conditions

 Set Condition:  When the Instrument Cluster detects a short to battery on the Control circuit.

Possible causes

  • (M24) COURTESY LAMPS DRIVER CIRCUIT SHORT TO GROUND
  • (M24) COURTESY LAMPS DRIVER CIRCUIT OPEN
  • INSTRUMENT CLUSTER
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1) TEST FOR INTERMITTENT CONDITION📷 1
Turn the ignition on.
Clear all Instrument Cluster DTC's
Turn the Courtesy Lamps on.
With the scan tool, read DTC's.
Does the scan tool read: B161A-COURTESY/DOME LAMP CONTROL CIRCUIT?
Yes
Go To 2).
No
The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform BODY VERIFICATION TEST - VER 1 . 2) CHECK THE (M24) COURTESY LAMPS DRIVER CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Measure the resistance between the (M24) Courtesy Lamp Driver circuit and ground.
Is the resistance below 5.0 ohms?
Yes
Repair the (M24) Courtesy Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1 .
No
Go To 3). 3) CHECK THE (M24) COURTESY LAMPS DRIVER CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Turn the ignition on.
Measure the voltage of the (M24) Courtesy Lamp Driver circuit.
Is the voltage below 10.0 volts?
Yes
Repair the (M24) Courtesy Lamp Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1 .
No
Replace the Instrument Cluster in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .
figure
B161E-READING LAMP CONTROL CIRCUIT📷 2
⚡ Wiring diagram: Exterior Lamps Circuit

Additional wiring

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

When monitored

Continuously

Set conditions

 Set Condition:  When the Instrument Cluster detects a short to battery on the Control circuit.

Possible causes

  • (M24) COURTESY LAMP DRIVER CIRCUIT SHORT TO GROUND
  • (M24) COURTESY LAMP DRIVER CIRCUIT OPEN
  • INSTRUMENT CLUSTER
figure
figure
1) TEST FOR INTERMITTENT CONDITION📷 2
Turn the ignition on.
Clear all Instrument Cluster DTC's
Turn the Courtesy Lamps on.
With the scan tool, read DTC's.
Does the scan tool read: B161E-READING LAMP CONTROL CIRCUIT?
Yes
Go To 2).
No
The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform BODY VERIFICATION TEST - VER 1 . 2) CHECK THE (M24) COURTESY LAMP DRIVER CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Measure the resistance between the (M24) Courtesy Lamp Driver circuit and ground.
Is the resistance below 5.0 ohms?
Yes
Repair the (M24) Courtesy Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1 .
No
Go To 3). 3) CHECK THE (M24) COURTESY LAMP DRIVER CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Activate the left and right vanity lamps (if equipped), the glove box lamp, and the left and right door handle lamps.
Turn the ignition on.
Measure the voltage of the (M24) Glove Box Lamp Driver circuit.
Is the voltage below 10.0 volts?
Yes
Repair the (M24) Courtesy Lamp Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1 .
No
Replace the Instrument Cluster in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .
figure
figure