B161A-COURTESY/DOME LAMP CONTROL CIRCUIT

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Continuously
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

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

No

Replace the Instrument Cluster in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)