Pinpoint Test P: The Traction Control Disabled Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test P: The Traction Control Disabled Indicator Is Never/Always On

Normal Operation

The traction control switch is hardwired to the Instrument Panel Cluster (IPC). When the traction control switch is pressed, the IPC sends a message to the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus, indicating that the traction control switch has been pressed. The ABS module either disables or enables the traction control and sends a message back to the IPC to turn on or off the traction control disabled indicator based upon the system state.

If the traction control switch state message is missing for less than 5 seconds, the traction control disabled indicator remains in the last indication mode (on or off) based upon the last known good message received. If the traction control switch state message is missing for more than 5 seconds, the IPC sets DTC U0121:00 in continuous memory and defaults the traction control disabled indicator off.

This pinpoint test is intended to diagnose the following:

- ABS module
- A MyKey(TM) programmed key is in use
- IPC



PINPOINT TEST P: THE TRACTION CONTROL DISABLED 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 disabled indicator does not turn on when the traction control disable button is pressed.
P1 CHECK FOR THE KEY TYPE


- Check 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 P2.

No
If the MyKey(TM) AdvanceTrac(R) on feature is configured always on, the system is operating normally. 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 P2.
P2 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC traction control disabled indicator (STAB_TC_LMP) active command. Command the traction control disabled indicator on and off while observing the traction control disabled indicator.
- Does the traction control disabled indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to P3.

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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P3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST


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

Yes
For DTC U0121:00, GO to Pinpoint Test AT. Pinpoint Tests AT: DTC U0121:00

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes

No
GO to P4.

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P4 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST


- Check for recorded DTCs from the ABS module 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. TEST the system for normal operation.

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