Pinpoint Test P: The Stability/Traction Control Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test P: The Stability/Traction Control Indicator Is Never/Always On
Normal Operation
The stability/traction control indicator flashes when the vehicle traction control or Roll Stability Control (RSC(R)) system is in active mode or is being controlled by the ABS module (RSC(R)) or the PCM (traction control). The Instrument Panel Cluster (IPC) receives the stability/traction control signal from the ABS module (RSC(R)) or the PCM (traction control) through the High Speed Controller Area Network (HS-CAN) communication bus. The IPC monitors the stability/traction control signal and, when the ABS module (RSC(R)) or the PCM (traction control) detects a concern, the IPC illuminates the stability/traction control indicator.
If the stability/traction control message is missing for less than 5 seconds, the IPC defaults the stability/traction control indicator to the last on/off state, based upon the last known good stability/traction control status message received.
If the stability/traction control message is missing for more than 5 seconds, the IPC sets DTC U0100:00 (traction control) or U0121:00 (RSC(R)) 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
- PCM
- IPC
PINPOINT TEST P: THE STABILITY/TRACTION CONTROL INDICATOR IS NEVER/ALWAYS ON
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P1 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 U0100:00, GO to Pinpoint Test AU. Pinpoint Tests AU: DTC U0100:00
For DTC U0121:00, GO to Pinpoint Test AW. Pinpoint Tests AW: DTC U0121:00
For all other DTCs, REFER to DTC Charts.
No
If equipped with traction control, GO to P2.
If equipped with RSC(R), GO to P3.
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P2 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST
- Check for recorded DTCs from the PCM Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
Yes
REFER to Computers and Control Systems.
No
GO to P4.
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P3 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
GO to P4.
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P4 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 stability/traction control indicator (TC/IVD/RSC_LMP) 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
If equipped with traction control, INSTALL a new PCM. REFER to Electronic Engine Controls Service and Repair. TEST the system for normal operation.
If equipped with RSC(R), INSTALL a new ABS module. REFER to Vehicle Dynamic Systems Service and Repair. TEST the system for normal operation.
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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