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

Instrumentation, Message Center and Warning Chimes

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

When a MyKey(R) programmed key is in use and the AdvanceTrac(R) on feature is configured always on, the stability/traction control system cannot be disabled and the stability/traction control indicator does not turn on when the traction control disable button is pressed. The stability/traction control indicator still functions normally to indicate a stability/traction control system fault and a stability/traction control active event.

If the stability/traction control disabled indicator request message is missing for less than 5 seconds, the stability/traction control disabled indicator remains in the last indication state (on or off) based upon the last known good message received. If the stability/traction control disabled indicator request message is missing for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0121:00 in continuous memory and defaults the stability/traction control disabled indicator off.

This pinpoint test is intended to diagnose the following:

- A MyKey(R) programmed key is in use

- Stability/traction control cannot be disabled

- ABS module

- IPC (Instrument Panel Cluster)

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

S1 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.

- Select the IPC (Instrument Panel Cluster) 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 S2.

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

S2 CHECK FOR THE KEY TYPE

- Check if the key is a MyKey(R) programmed key or an administrator key.

Is the key an administrator key?

Yes
GO to S3.

No
If the MyKey(R) AdvanceTrac(R) on feature is configured always on, the system is normal. The stability/traction control system cannot be disabled when the AdvanceTrac(R) on feature is configured always on.

If the MyKey(R) AdvanceTrac(R) on feature is not configured always on, GO to S3.

S3 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) traction control switch PID (STAB_CTRL_SW).

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

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

Yes
GO to S4.

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

S4 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 U0121:00, GO to Pinpoint Test BD. Pinpoint Test BD: DTC U0121:00

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes
No
GO to S5.

S5 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.