Pinpoint Test AH: The Chime Sounds When The Driver Door Is Ajar (No Key In Ignition And Headlamps Off)

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AH: The Chime Sounds When The Driver Door Is Ajar (No Key In Ignition And Headlamps Off)

Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information Electrical Diagrams.

Normal Operation

On vehicles without Intelligent Access (IA), the key-in-ignition warning switch is hardwired to the Body Control Module (BCM) through the key-in-ignition input circuit. When the key is inserted into the ignition lock cylinder, the key-in-ignition switch opens and removes the ground to the Body Control Module (BCM). When the BCM (Body Control Module) detects the key-in-ignition input open with the driver door open, the BCM (Body Control Module) sends the IPC (Instrument Panel Cluster) a message over the Medium Speed Controller Area Network (MS-CAN) communication bus to sound the key-in-ignition chime.

On vehicles with IA (Intelligent Access), the Remote Function Actuator (RFA) module generates an implied key-in-ignition status from the ignition states and the driver door ajar input. If the vehicle is turned off with the selector lever out of PARK (P) and the driver door open, the RFA (Remote Function Actuator) module sends the IPC (Instrument Panel Cluster) a message to sound the key-in-ignition chime.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Key-in-ignition warning switch (without IA (Intelligent Access))

- BCM (Body Control Module)

PINPOINT TEST AH : THE CHIME SOUNDS WHEN THE DRIVER DOOR IS AJAR (NO KEY IN IGNITION AND HEADLAMPS OFF)

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

AH1 CHECK THE INSTRUMENT CLUSTER ILLUMINATION

- Close all doors.

- Wait one minute.

- Observe the exterior lights.

Are the headlamps and parking lamps off?

Yes
GO to AH2.

No
REFER to Lighting and Horns.

AH2 CHECK THE INTERIOR LIGHTING OPERATION

- Open and close the driver door.

- Observe the interior lamps.

Do the interior lamps operate correctly from the driver door?

Yes
GO to AH3.

No
REFER to Lighting and Horns.

AH3 RETRIEVE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST

- Check for recorded DTCs from the BCM (Body Control Module) self-test.

Are any DTCs recorded?

Yes
REFER to Body Control Systems for correct navigation of the DTC.

No
GO to AH4.

AH4 CHECK THE KEY-IN-IGNITION SWITCH OPERATION

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280G.

- Remove the key from the ignition lock cylinder.

- Measure the resistance between the BCM (Body Control Module) C2280G-9, circuit CDC30 (BU/GY), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to AH6.

No
GO to AH5.

AH5 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR A SHORT TO GROUND

- Disconnect: Key-In-Ignition Switch C2112.

- Measure the resistance between the BCM (Body Control Module) C2280G-9, circuit CDC30 (BU/GY), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new ignition switch. TEST the system for normal operation.

No
REPAIR circuit CDC30 (BU/GY) short to ground. TEST the system for normal operation.

AH6 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Disconnect all the BCM (Body Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the BCM (Body Control Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.