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

Instrumentation, Message Center and Warning Chimes

Pinpoint Test Q: The Stability/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 (Instrument Panel Cluster) sends a message to the ABS module (with Roll Stability Control (RSC(R))) or the PCM (traction control only) over the High Speed Controller Area Network (HS-CAN) communication bus indicating that the traction control switch has been pressed. The ABS module or PCM either disables or enables the stability/traction control system and sends a message back to the IPC (Instrument Panel Cluster) to turn on or off the stability/traction control disabled indicator based upon the system state.

If the traction control switch state message is missing for less than 5 seconds, the stability/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 (Instrument Panel Cluster) sets DTC U0121:00 (RSC(R) (Roll Stability Control)) or U0100:00 (traction control only) in continuous memory and defaults the stability/traction control disabled indicator off.

This pinpoint test is intended to diagnose the following:

- Stability/traction control cannot be disabled

- ABS module

- IPC (Instrument Panel Cluster)

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

Q1 CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Enter the IPC (Instrument Panel Cluster) active command mode and select the stability/traction control disabled indicator (STAB_TC_LMP) active command. Command the stability/traction control disabled indicator on and off while observing the stability/traction control disabled indicator.

Does the stability/traction control disabled indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to Q2.

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

Q2 CHECK THE TRACTION CONTROL INPUT TO THE IPC (Instrument Panel Cluster)

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) stability/traction control indicator PID (STAB_CTRL_SW).

- Monitor the traction control PID while pressing and releasing the traction control disable switch.

Does the stability/traction control PID read RELEASED when the button is released and DEPRESSED when the button is pressed?

Yes
GO to Q3.

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

Q3 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Are any DTCs recorded?

Yes
For DTC U0100:00, GO to Pinpoint Test AU. Pinpoint Test AU: DTC U0100:00

For DTC U0121:00, GO to Pinpoint Test AW. Pinpoint Test AW: DTC U0121:00

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

No
For RSC(R) (Roll Stability Control), GO to Q4.

For traction control only, GO to Q5.

Q4 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. TEST the system for normal operation.

Q5 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO (Key ON Engine OFF) 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
INSTALL a new PCM. TEST the system for normal operation.