Pinpoint Test AQ: The Parking Brake Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AQ: The Parking Brake Warning Chime Is Inoperative

Normal Operation

The Instrument Panel Cluster (IPC) receives the parking brake warning chime request from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). The parking brake warning chime sounds when the ignition switch is on, the parking brake is engaged and the vehicle speed is greater than 5 km/h (3 mph). The parking brake warning chime stops sounding and resets if the parking brake is released, the ignition switch is not on, if the vehicle speed is below 5 km/h (3 mph), or after 90 seconds from the time the chime is activated.

NOTE: Make sure the parking brake warning chime operation is verified with the vehicle moving at least 5 km/h (3 mph) with the parking brake slightly applied (just enough to turn the brake warning indicator on) without damaging the rear brakes.

This pinpoint test is intended to diagnose the following:

- Brake warning indication concern

- BCM (Body Control Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST AQ : THE PARKING BRAKE WARNING CHIME IS INOPERATIVE

AQ1 CHECK THE KEY-IN-IGNITION WARNING CHIME OPERATION

- Ignition OFF.

- With the ignition switch in the OFF position and the key in the ignition lock cylinder, open the LH front door and observe the key-in-ignition warning chime operation.

Does the key-in-ignition warning chime operate correctly?

Yes
GO to AQ2.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

AQ2 CHECK THE BRAKE WARNING INDICATOR OPERATION

- Apply the parking brake.

- Ignition ON.

- Observe the brake warning indicator.

Does the brake warning indicator illuminate?

Yes
GO to AQ3.
No
GO to Pinpoint Test M. Pinpoint Test M: The Brake Warning Indicator is Never On

AQ3 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded IPC (Instrument Panel Cluster) DTCs from the self-test.

Are any DTCs recorded?

Yes
For DTC U0140:00, GO to Pinpoint Test AY. Pinpoint Test AY: DTC U0140:00

For all other DTCs, REFER to DTC Chart. Instrumentation, Message Center and Warning Chimes
No
GO to AQ4.

AQ4 RETRIEVE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST

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

Are any DTCs recorded?

Yes
REFER to Body Control Systems for correct navigation of the DTC.
No
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.