Pinpoint Test E: One Or More Switch Illumination is Inoperative

Instrument Cluster and Panel Illumination

Pinpoint Test E: One Or More Switch Illumination is Inoperative

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

Normal Operation

The Body Control Module (BCM) sends voltage to the dimmable components.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Illuminated switch

PINPOINT TEST E : 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.

E1 CHECK THE VOLTAGE TO THE SINGLE ILLUMINATION

NOTE: If the instrument panel dimmer switch illumination is the inoperative source, increase the backlighting brightness to the highest setting before disconnect the instrument panel dimmer switch connector.

- Ignition OFF.

- Disconnect: Inoperative Illumination Source.

- Ignition ON.

- NOTE: If the headlamp switch illumination is the inoperative source, unplugging the headlamp switch connector causes the BCM (Body Control Module) to turn the exterior lights on by default, so there is no need to turn the parking lamps on.
Place the headlamp switch to the PARKING LAMPS ON position.


- Increase the backlighting brightness to the highest setting.

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

Component Connector-Pin Circuit Instrument panel dimmer switch C2298-2 CLN04 (BU/BN) Headlamp switch C205-1 CLN04 (BU/BN) Front Controls Interface Module (FCIM) C2402-3 CLN04 (BU/BN) HVAC module C228A-6 CLN04 (BU/BN) Floor shifter C3245-4 CLN04 (BU/BN) Driver heated seat switch C2400-5 CLN04 (BU/BN) Passenger heated seat/ambient lighting switch C2401-5 CLN04 (BU/BN) Start/stop switch C2195-6 CLN04 (BU/BN)

Is the voltage greater than 10 volts?

Yes
GO to E2.

No
REPAIR circuit CLN04 (BU/BN) for an open. TEST the system for normal operation.

E2 CHECK THE GROUND CIRCUIT TO THE ILLUMINATION SOURCE FOR CONTINUITY

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

Component Connector-Pin/ Circuit Connector-Pin/ Circuit Instrument panel dimmer switch C2298-2 CLN04 (BU/BN) C2298-1 GD115 (BK/GY) Headlamp switch C205-1 CLN04 (BU/BN) C205-8 GD115 (BK/GY) Front Controls Interface Module (FCIM) C2402-3 CLN04 (BU/BN) C2402-5 GD115 (BK/GY) HVAC module C228A-6 CLN04 (BU/BN) C228A-13 GD115 (BK/GY) Floor shifter C3245-4 CLN04 (BU/BN) C3245-5 GD115 (BK/GY) Driver heated seat switch C2400-5 CLN04 (BU/BN) C2400-4 GD115 (BK/GY) Passenger heated seat/ambient lighting switch C2401-5 CLN04 (BU/BN) C2401-4 GD115 (BK/GY) Start/stop switch C2195-6 CLN04 (BU/BN) C2195-1 GD115 (BK/GY)

Is the voltage greater than 10 volts?

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

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.