Pinpoint Test AO: The Key-In-Ignition Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AO: The Key-In-Ignition Warning Chime Is Inoperative


Normal Operation

The Instrument Panel Cluster (IPC) receives the key-in-ignition warning status from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). The key-in-ignition warning switch (part of the ignition switch) is hardwired to the BCM (Body Control Module). When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes and supplies voltage to the BCM (Body Control Module). The BCM (Body Control Module) monitors the door ajar input from the LH front door and the key-in-ignition switch status. When the key is inserted into the ignition lock cylinder and the driver door is open or ajar, the BCM (Body Control Module) sends the IPC (Instrument Panel Cluster) a chime request message to sound the key-in-ignition warning chime.

- DTC B10F1:14 (Key In Switch: Circuit Short To Ground or Open)- a continuous and on-demand DTC that sets if the BCM (Body Control Module) detects an open on the key-in-ignition switch input circuit or if the BCM (Body Control Module) detects ignition START, RUN/START OR RUN/ACC inputs without the key-in-ignition input.

This pinpoint test is intended to diagnose the following:

- Interior lighting concern

- Wiring, terminals or connectors

- Key-in-ignition warning switch (part of the ignition switch)

- BCM (Body Control Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST AO : THE KEY-IN-IGNITION WARNING CHIME IS INOPERATIVE

AO1 CHECK THE SAFETY BELT WARNING CHIME OPERATION

- Ignition OFF.

- Unbuckle the driver safety belt.

- Ignition ON.

- Monitor the safety belt warning chime when the ignition switch is transitioned from OFF to RUN for 6 seconds.

Does the safety belt warning chime operate for approximately 6 seconds?

Yes
GO to AO2.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

AO2 CHECK THE INTERIOR LAMPS OPERATION

- Open and close the driver door.

- Observe the interior lamps.

Do the interior lamps operate correctly from the driver door?

Yes
GO to AO3.
No
REFER to Lighting and Horns.

AO3 RETRIEVE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST

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

Is DTC B10F1:14 present?

Yes
GO to AO4.
No
GO to AO6.

AO4 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE

- Ignition OFF.

- Insert the key into the ignition cylinder.

- Disconnect: BCM (Body Control Module) C2280B.

- Measure the voltage between the BCM (Body Control Module) C2280B-34, circuit CDC30 (BU/GY), harness side and ground.






Is the voltage greater than 10 volts?

Yes
GO to AO6.
No
GO to AO5.

AO5 CHECK THE IGNITION SWITCH

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Carry out the ignition switch component test.


Is the ignition switch OK?

Yes
REPAIR circuit CDC30 (BU/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
No
INSTALL a new ignition switch. CLEAR the DTCs. REPEAT the self-test.

AO6 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.