Pinpoint Test P: The Traction Control Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test P: The Traction Control Indicator Is Never/Always On
Normal Operation
The traction control indicator flashes when the vehicle traction control or roll stability assist system is in active mode or is being controlled by the ABS module (roll stability assist) or the PCM (traction control). The Instrument Panel Cluster (IPC) receives the traction control/stability assist signal from the ABS module (roll stability assist) or the PCM (traction control) through the High Speed Controller Area Network (HS-CAN) communication bus. The IPC monitors the traction control/stability assist signal and, when the ABS module (roll stability assist) or the PCM (traction control) detects a concern, the IPC illuminates the traction control indicator.
If the traction control message is missing for less than 5 seconds, the IPC defaults the traction control indicator to the last on/off state, based upon the last known good traction control status message received.
If the traction control message is missing for more than 5 seconds, the IPC sets DTC U0100:00 (traction control) or U0121:00 (roll stability control) in continuous memory and defaults the traction control indicator on.
This pinpoint test is intended to diagnose the following:
- Traction control/stability assist concern
- ABS module
- PCM
- IPC
PINPOINT TEST P: THE 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 AV. Pinpoint Tests AV: DTC U0100:00
For DTC U0121:00, GO to Pinpoint Test AX. Pinpoint Tests AX: DTC U0121:00
For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes
No
If equipped with traction control, GO to P2.
If equipped with roll stability assist, 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 Information.
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 Antilock Brakes / Traction Control Systems.
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 traction control indicator (TC/IVD/RSC_LMP) active command. Command the traction control active indicator on and off while observing the traction control indicator.
- Does the 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 Computers and Control Systems. TEST the system for normal operation.
If equipped with roll stability control, INSTALL a new ABS module. REFER to Antilock Brakes / Traction Control Systems. 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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