Pinpoint Tests AX: The Parking Brake Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AX: 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) communication bus. The parking brake warning chime sounds when the ignition switch is in the ON position, 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 in the ON position, 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 that 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
- IPC

PINPOINT TEST AX: THE PARKING BRAKE WARNING CHIME IS INOPERATIVE

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AX1 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 AX2.

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

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AX2 CHECK THE BRAKE WARNING INDICATOR OPERATION

- Apply the parking brake.
- Ignition ON.
- Observe the brake warning indicator.
- Does the brake warning indicator turn on?

Yes
GO to AX3.

No
GO to Pinpoint Test O. Pinpoint Test O: The Brake Warning Indicator is Never On

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AX3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded IPC DTCs from the self-test.
- Are any DTCs recorded?

Yes
For DTC U0140:00,GO to Pinpoint Test BF. For all other DTCs, REFER to DTC Chart. Pinpoint Tests BF: DTC U0140:00

No
GO to AX4.

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AX4 RETRIEVE THE RECORDED DTCs FROM THE BCM SELF-TEST

- Check for recorded BCM DTCs from the self-test.
- Are any DTCs recorded?

Yes
REFER to Multifunction Electronic Modules Testing and Inspection for correct navigation of the DTC.

No
INSTALL a new BCM. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.

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