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

Normal Operation 

The traction control indicator flashes when the vehicle traction control is in active mode or is being controlled by the ABS module. 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 instrument cluster (IC) monitors the traction control message and when the ABS module detects a traction control concern, the instrument cluster (IC) illuminates the traction control indicator. If the traction control message is missing for more than 5 seconds, the instrument cluster (IC) sets DTC U0121 in continuous memory and defaults the traction control indicator on.

This pinpoint test is intended to diagnose the following:

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

  1. X1 CHECK THE TRACTION CONTROL INDICATOR OPERATION USING THE TRACTION CONTROL DISABLE SWITCH 
    • Press the traction control disable switch to disable the traction control system while monitoring the traction control indicator.
    • Does the traction control indicator illuminate? 
    1. YES  : If the traction control indicator does not operate while in traction active mode, go to  X6.

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

    2. NO  : Go to  X2.
  2. X2 CARRY OUT THE INSTRUMENT CLUSTER (IC) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) DataLogger
    • Select the instrument cluster (IC) traction control indicator (CHECK_TRACT) active command and command the traction control active indicator on and off. Observe the traction control indicator.
    • Does the traction control indicator illuminate when commanded on, and turn off when commanded off? 
    1. YES  : Go to  X3.
    2. NO  : Go to  X7.
  3. X3 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND ABS MODULE SELF-TESTS 
    • Check for recorded ABS module DTCs from the continuous and on-demand self-tests.
    • Are any ABS module DTCs recorded? 
    1. YES  : REFER to VEHICLE DYNAMIC SYSTEMS article.
    2. NO  : Go to  X4.
  4. X4 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER (IC) SELF-TESTS 
    • Check for recorded instrument cluster (IC) DTCs from the continuous and on-demand self-tests.
    • Is DTC U0121 recorded? 
    1. YES  : Go to  X5.
    2. NO  : Go to  X6.
  5. X5 CARRY OUT THE INSTRUMENT CLUSTER (IC) SELF-TEST 
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) Self-Test
    • Clear the DTCs. Repeat the instrument cluster (IC) self-test.
    • Is DTC U0121 present? 
    1. YES  : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose no communication with the ABS module.
    2. NO  : The traction control indicator is operating correctly at this time. The concern may have resulted from an intermittent network concern.
  6. X6 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS module connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the ABS module connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new ABS module. REFER to VEHICLE DYNAMIC SYSTEMS article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
  7. X7 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION 
    • Disconnect the instrument cluster (IC) connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the instrument cluster (IC) connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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