Pinpoint Tests AC: The Traction Control Message Center Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AC: The Traction Control Message Center Indicator Is Never/Always On

Normal Operation

The Instrument Cluster (IC) receives the traction control data from the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus. The traction control message center indicator flashes when the vehicle traction control is in active mode or is being controlled by the ABS module. The traction control message center indicator flashes when the vehicles traction control is in active mode or is being controlled by the ABS module. The IC monitors the traction control message and when the ABS module detects a traction control concern, the IC illuminates the traction control message center indicator.

If the traction control message is missing for less than 5 seconds, the IC defaults the traction control message center indicator to the last on/off state, based upon the last known good traction control status message received.

If the traction control message is missing for more than 5 seconds, the IC sets DTC U0121 in continuous memory and defaults the traction control message center indicator on.

This pinpoint test is intended to diagnose the following:

- Traction control concern
- Message center concern
- ABS module



PINPOINT TEST AC: THE TRACTION CONTROL MESSAGE CENTER INDICATOR IS NEVER/ALWAYS ON

NOTE: When a MyKey(TM) programmed key is in use and the AdvanceTrac(R) on feature is configured always on, the traction control system cannot be disabled and the traction control message center indicator does not turn on when the traction control disable button is pressed. The traction control message center indicator still functions normally to indicate a traction control system fault and a traction control active event.

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AC1 CHECK THE MESSAGE CENTER WARNING INDICATOR FUNCTION


- Close all doors and hood.
- Ignition ON.
- Open the driver door while monitoring the door ajar message center displays.
- Does the door ajar message center warning indicator display?

Yes
GO to AC2.

No
GO to Pinpoint Test AF. Pinpoint Tests AF: The Message Center Is Not Operating Correctly

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AC2 CHECK FOR THE KEY TYPE


- Check to see if the key is a MyKey(TM) programmed key or administrator key. Refer to Antitheft and Alarm Systems.
- Is the key an administrator key?

Yes
GO to AC3.

No
If the MyKey(TM) AdvanceTrac(R) on feature is configured always on, the system is normal. The traction control system cannot be disabled when the AdvanceTrac(R) on feature is configured always on.

If the MyKey(TM) AdvanceTrac(R) on feature is not configured always on, GO to AC3.

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AC3 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Is DTC U0121 recorded?

Yes
GO to Pinpoint Test AS. Pinpoint Tests AR: DTC U0102

No
GO to AC4.

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AC4 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST


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

Yes
REFER to Antilock Brakes / Traction Control Systems.

No
INSTALL a new ABS module. REFER to Antilock Brakes / Traction Control Systems.

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