Pinpoint Test O: The Stability/Traction Control Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test O: The Stability/Traction Control Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the stability/traction control data from the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus. The stability/traction control indicator flashes when the vehicle traction control is in active mode or is being controlled by the ABS module. The IPC monitors the stability/traction control message from the ABS module and either flashes the stability/traction control indicator or turns it on steady depending on the condition.

If the stability/traction control message is invalid for 5 seconds or less or if the IPC does not receive the stability/traction control message for 5 seconds or less, the IPC defaults the stability/traction control indicator to the last indication mode (on/off) based upon the last known good message. If the stability/traction control message is missing for more than 5 seconds, the IPC sets DTC U0121:00 in continuous memory and defaults the stability/traction control indicator on.

This pinpoint test is intended to diagnose the following:

- Stability/traction control concern
- ABS module
- IPC

PINPOINT TEST O: THE STABILITY/TRACTION CONTROL INDICATOR IS NEVER/ALWAYS ON

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O1 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 stability/traction control indicator (TC/IVD/RSCLMP) active command. Command the stability/traction control active indicator on and off while observing the stability/traction control indicator.
- Does the stability/traction control indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to O2.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

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O2 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 AO. For all other DTCs, REFER to DTC Charts. Pinpoint Tests AO: DTC U0121:00

No
GO to O3.

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O3 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 Vehicle Dynamic Systems Testing and Inspection.

No
If the stability/traction control indicator is never on, the system is operating correctly at this time. If the stability/traction control indicator is always on, INSTALL a new ABS module. TEST the system for normal operation.

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