Pinpoint Test R: The Traction Assist Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test R: The Traction Assist Indicator Is Never/Always On

Normal Operation

The traction assist indicator flashes when the vehicle traction control is in active mode or is being controlled by the ABS module. 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 IC monitors the traction control message and when the ABS module detects a traction control concern, the IC illuminates the traction assist indicator. If the traction control message is missing for greater than 5 seconds, the IC sets DTC U0121 and defaults the traction assist indicator on.

This pinpoint test is intended to diagnose the following:

- ABS module
- IC

PINPOINT TEST R: THE TRACTION ASSIST 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 indicator does not turn on when the traction control disable button is pressed. The traction control indicator still functions normally to indicate a traction control system fault and a traction control active event.

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R1 CARRY OUT THE IC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger .
- Select the IC traction assist indicator (TC/IVD/RSC_L) active command on and off. Observe the traction assist indicator.
- Does the traction assist indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to R2.

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

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R2 CHECK FOR THE KEY TYPE


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

Yes
GO to R3.

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 R3.

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R3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST


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

Yes
REFER to Vehicle Dynamic Systems Testing and Inspection.

No
GO to R4.

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R4 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 AW. Pinpoint Test AW: DTC U0121

No
INSTALL a new ABS module. REFER to Vehicle Dynamic Systems Service and Repair. TEST the system for normal operation.

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