Pinpoint Tests AE: The Turn Signal On Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AE: The Turn Signal On Warning Chime Is Inoperative

Normal Operation

The turn signal on warning chime is an internal function of the Lighting Control Module (LCM). The LCM monitors the turn signal switch status and receives the odometer rolling count data from the Instrument Cluster (IC) over the Medium Speed Controller Area Network (MS-CAN) communication bus.

This pinpoint test is intended to diagnose the following:

- Turn signal on warning chime disabled
- LCM



PINPOINT TEST AE: THE TURN SIGNAL ON WARNING CHIME IS INOPERATIVE

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AE1 CHECK THE LCM CONFIGURATION


- Verify the turn signal on warning chime is enabled.
- Is the turn signal warning chime enabled?

Yes
GO to AE2.

No
ENABLE the turn signal on warning chime function. REFER to Information Bus. TEST the system for normal operation.

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AE2 CHECK THE OPERATION OF THE TURN SIGNALS


- Ignition ON.
- Operate the turn signals.
- Do the turn signal lamps operate correctly?

Yes
GO to AE3.

No
REFER to Lighting and Horns.

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AE3 CHECK THE ODOMETER OPERATION IN THE IC


- Observe the odometer display.
- Does the odometer operate correctly?

Yes
INSTALL a new LCM. REFER to Body Control Systems.

No
GO to Pinpoint Test E. Pinpoint Test E: The Speedometer/Odometer Is Inoperative

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