Pinpoint Tests AJ: The Parking Brake Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AJ: The Parking Brake Warning Chime Is Inoperative

Normal Operation

The Instrument Cluster (IC) uses vehicle speed data sent from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus and the parking brake switch status sent from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) to determine when to turn on the parking brake warning chime.

The SJB monitors and uses the ignition ON position, the parking brake on status, and vehicle speed that 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 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 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).

This pinpoint test is intended to diagnose the following:

- Brake warning indication concern
- Speedometer concern
- IC



PINPOINT TEST AJ: THE PARKING BRAKE WARNING CHIME IS INOPERATIVE

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AJ1 CARRY OUT THE CHIME FUNCTION ACTIVE COMMAND


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC chime command (CHIME_P_BRK).
- Does the chime operate?

Yes
GO to AJ2.

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

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AJ2 CHECK THE BRAKE WARNING INDICATOR FOR CORRECT OPERATION


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

Yes
GO to AJ3.

No
Go To Pinpoint Test K. Pinpoint Test K: The Brake Warning Indicator Is Never On

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AJ3 CHECK THE SPEEDOMETER FOR CORRECT OPERATION


- Ignition ON.
- Drive the vehicle and verify that the speedometer is operating correctly.
- Does the speedometer operate correctly?

Yes
GO to AJ4.

No
Go To Pinpoint Test E. Pinpoint Test E: The Speedometer Is Inoperative

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AJ4 RETRIEVE THE RECORDED DTCs FROM THE SJB SELF-TEST


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

Yes
REFER to Body Control Systems.

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

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