Pinpoint Test G: One Or More Switch Illumination Is Inoperative

Instrument Cluster and Panel Illumination

Pinpoint Tests

Pinpoint Test G: One Or More Switch Illumination Is Inoperative

Refer to Wiring Diagram Set 71, Cluster and Panel Illumination for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 110, Power Door Locks for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 119, Climate Controlled Seats for schematic and connector information. Diagrams By Number

Normal Operation

The Lighting Control Module (LCM) supplies a variable Pulse Width Modulated (PWM) voltage to the dimmable illumination. With the ignition switch in the ACC or RUN position, voltage is supplied from the Central Junction Box (CJB) to the door lock control switches and heated seat control switches.

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- Headlamp switch
- Traction control switch
- Message center switch
- Rear window defrost switch
- Adjustable pedal switch
- Door lock control switch(es)
- Heated seat control switch(es)

PINPOINT TEST G: ONE OR MORE SWITCH ILLUMINATION IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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G1 CHECK FOR VOLTAGE TO THE INOPERATIVE COMPONENT


- Ignition OFF.
- Disconnect: Inoperative Illumination Source.
- Ignition ON.
- With the parking lamps on, rotate the instrument panel dimmer switch to the maximum brightness position.
- Measure the voltage between the inoperative illumination source, harness side and ground as follows:









- Is the voltage greater than 10 volts?

Yes
GO to G2.

No
For the door lock control switches and heated seat control switches, VERIFY that the CJB fuse 9 (7.5A) is OK. If OK, REPAIR circuit 964 (DB/LG) for an open. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

For all others, REPAIR circuit 484 (OG/BK) for an open. TEST the system for normal operation.

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G2 CHECK FOR VOLTAGE TO THE SINGLE ILLUMINATION SOURCE USING THE CONNECTOR GROUND


- Measure the voltage between the inoperative illumination source connector, harness side as follows:









- Is the voltage greater than 10 volts?

Yes
INSTALL a new component in question. TEST the system for normal operation.

No
REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

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