Pinpoint Test X: The Traction Assist Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test

Pinpoint Test X: The Traction Assist Indicator Is Never/Always On

Normal Operation

When the PCM senses a traction assist event is taking place, it sends the Instrument Cluster (IC) a message over the communication network to illuminate the traction assist indicator or to flash the traction assist indicator. The traction assist indicator informs the driver that a traction assist event is taking place, by flashing the indicator. It is also used to indicate a malfunction in the traction assist system, or if the traction assist control has been disabled by the operator, by illuminating the indicator constantly (not flashing).

This pinpoint test is intended to diagnose the following:

- Traction assist system
- PCM
- IC



PINPOINT TEST X: THE TRACTION ASSIST INDICATOR IS NEVER/ALWAYS ON

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X1 CHECK THE TRACTION ASSIST INDICATOR OPERATION USING THE TRACTION ASSIST DISABLE SWITCH


- Ignition ON.
- Press the traction assist disable switch to disable the traction assist system while monitoring the traction assist indicator.
- Does the traction assist indicator illuminate?

Yes
If the traction assist indicator does not operate while in traction active mode, INSTALL a new PCM. REFER to Computers and Control Systems Information. TEST the system for normal operation.

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

No
GO to X2.

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X2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Are any IC DTCs recorded?

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

For DTC U1900 or U1901, REFER to Information Bus.

For all other DTCs, REFER to DTC Charts. [1][2]Diagnostic Trouble Code Descriptions

No
GO to X3.

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X3 CARRY OUT THE IC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC traction control indicator (CHECK_TRACT) active command. Command the traction assist lamp on and off. Observe the traction assist indicator.
- Does the traction assist indicator illuminate when commanded on, and turn off when commanded off?

Yes
GO to X4.

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

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X4 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST


- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any PCM DTCs recorded?

Yes
REFER to Computers and Control Systems Information.

No
INSTALL a new PCM. REFER to Computers and Control Systems Information. TEST the system for normal operation.

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