Pinpoint Test R: The Stability/Traction Control Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test R: The Stability/Traction Control Indicator Is Never/Always On
Normal Operation
On vehicles with stability control, the Instrument Panel Cluster (IPC) receives the stability/traction control indicator request from the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus. On vehicles with Engine Only Traction Control (EOTC), the IPC receives the traction control indicator request from the PCM over the HS-CAN communication bus. The stability/traction control indicator flashes rapidly when the vehicle stability/traction control is in active mode or is being controlled by the ABS module or PCM. The stability/traction control indicator flashes slowly generally when a configuration conflict or concern is present in the ABS or PCM. The stability/traction control indicator turns on steady if a fault condition exists in the stability/traction control system. The IPC monitors the stability/traction control message from the ABS module or PCM and either flashes the stability/traction control indicator or turns it on steady depending on the condition. The stability/traction control indicator is also used to indicate a trailer sway condition (if equipped).
If the stability/traction control indicator status message is missing for less than 5 seconds, the IPC defaults the stability/traction control indicator to its last state (on or off) based upon the last known good message received. If the stability/traction control indicator status message is missing for more than 5 seconds, the IPC sets DTC U0100:00 (engine only traction control) or DTC U0121:00 (stability control) 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 (with stability control)
- PCM (with EOTC)
- IPC
PINPOINT TEST R: THE STABILITY/TRACTION CONTROL INDICATOR IS NEVER/ALWAYS ON
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R1 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 R2.
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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R2 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 BD. For all other DTCs, REFER to DTC Charts. Pinpoint Tests BD: DTC U0121:00
No
For stability control, GO to R3. For EOTC, GO to R4.
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R3 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. REFER to Vehicle Dynamic Systems Service and Repair. TEST the system for normal operation.
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R4 RETRIEVE THE RECORDED DTCs FROM PCM KOEO SELF-TEST
- Check the recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
Yes
REFER to Computers and Control Systems. TEST the system for normal operation.
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 PCM. REFER to Electronic Engine Controls Service and Repair. TEST the system for normal operation.
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