VEHICLE STABILITY CONTROL SYSTEM CHECK FOR INTERMITTENT PROBLEMS


  1. CHECK FOR INTERMITTENT PROBLEMS

    Tech Tips

    A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected using the Data List function of the GTS.


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Follow the directions on the GTS to display the Data List and select areas where momentary interruption should be monitored.

      Tech Tips


      • A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned to ON (initial check).

      • If Error remains displayed for one of the items on the GTS, check for continuity between the ECU and the item for which Error is displayed.

      • If a momentary interruption occurs and Error is displayed on the GTS, Error will remain displayed on the GTS for 1 second after the circuit returns to normal.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      EFI Communication Open EFI communication open detection / Error or Normal Normal: Normal Error: Momentary interruption
      Yaw Rate Open Yaw rate sensor open detection / Error or Normal Normal: Normal Error: Momentary interruption
      Deceleration Open Acceleration sensor open detection / Error or Normal Normal: Normal Error: Momentary interruption
      Steering Open Acceleration sensor open detection / Error or Normal Normal: Normal Error: Momentary interruption
      IG Voltage Value Decreased +BS voltage value decrease detection / Error or Normal Normal: Normal Error: Voltage low
      IG Voltage Value Increased +BS voltage value increase detection / Error or Normal Normal: Normal Error: Voltage high
    6. While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.

      Tech Tips

      If the display changes, this indicates that there has been a momentary interruption (open circuit) in the connector and/or wire harness. In this case, repair or replace the connectors and/or wire harnesses as one of them is faulty.