Pinpoint Test N: The Traction Control Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test N: The Traction Control Indicator Is Never/Always On

Normal Operation

The Instrument Cluster (IC) receives the traction control data from the ABS module over the High Speed Controller Area Network (HS-CAN) communication bus. The traction control indicator flashes when the vehicle traction control is in active mode or is being controlled by the ABS module. The traction control indicator turns on steady if the traction control system has been disabled through the traction control switch or if a fault condition exists in the system. The IC (Instrument Cluster) monitors the traction control message from the ABS module and either flashes the traction control indicator or turns it on steady depending on the condition. If the traction control message is missing for more than 5 seconds, the IC (Instrument Cluster) sets DTC U0121 in continuous memory and defaults the traction control indicator on.

This pinpoint test is intended to diagnose the following:

- Traction control concern

- A MyKey(TM) programmed key is in use

- ABS module

- IC (Instrument Cluster)

PINPOINT TEST N : THE TRACTION CONTROL INDICATOR IS NEVER/ALWAYS ON

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

N1 CHECK THE TRACTION CONTROL INDICATOR OPERATION USING THE TRACTION CONTROL DISABLE SWITCH

- Ignition ON.

- Press the traction control disable switch to disable the traction control system while monitoring the traction control indicator.

Does the traction control indicator illuminate?

Yes
If the traction control indicator does not operate while in traction active mode, GO to N4.

If the traction control indicator operates in traction active mode, the system is operating normally at this time.

No
GO to N2.

N2 CHECK FOR THE KEY TYPE

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

Is the key an administrator key?

Yes
GO to N3.

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

If the MyKey(TM) AdvanceTrac(R) on feature is not configured always on, GO to N3.

N3 RETRIEVE THE RECORDED DTCs FROM THE IC (Instrument Cluster) SELF-TEST

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

Are any DTCs recorded?

Yes
For DTC C1093, REFER to Antilock Brakes/Traction Control Systems.

For DTC U0121, GO to Pinpoint Test AQ. Pinpoint Test AQ: DTC U0121

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

No
GO to N4.

N4 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST

- Check for recorded ABS module DTCs from the self-test.

Are any DTCs recorded?

Yes
REFER to Antilock Brakes/Traction Control Systems.

No
GO to N5.

N5 CARRY OUT THE IC (Instrument Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

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

- Select the IC (Instrument Cluster) traction control indicator (TCSLAMP) 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
INSTALL a new ABS module. TEST the system for normal operation.

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