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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test W: 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
- IPC



PINPOINT TEST W: THE TRACTION CONTROL DISABLED INDICATOR IS NEVER/ALWAYS ON

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W1 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 .
- Enter the IPC active command mode and select the 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 W2.

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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W2 CHECK THE TRACTION CONTROL INPUT TO THE IPC


- Enter the following diagnostic mode on the scan tool: IPC DataLogger .
- Select the IPC traction control indicator PID (STAB_CTRL_SW).
- Monitor the traction control PID while pressing and releasing the traction control disable switch.
- Does the traction control PID read RELEASED when the button is released and DEPRESSED when the button is pressed?

Yes
GO to W3.

No
REFER to Antilock Brakes / Traction Control Systems to diagnose the traction control system cannot be disabled.

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W3 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 C0089:11, REFER to Antilock Brakes / Traction Control Systems.

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

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

No
GO to W4.

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W4 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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