VEHICLE STABILITY CONTROL SYSTEM CHECK FOR INTERMITTENT PROBLEMS

  1. CHECK FOR INTERMITTENT PROBLEMS

    Tip:

    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.

      Tip:

      • 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.

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      EFI Communication Open

      EFI communication open detection

      Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -

      Yaw Rate Open

      Yaw rate sensor open detection

      Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -

      Deceleration Open

      Acceleration sensor open detection

      Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -

      Steering Open

      Steering angle sensor open detection

      Error or Normal

      Error: Momentary interruption

      Normal: Normal

      -

      IG Voltage Value Decreased

      +BS voltage value decrease detection

      Error or Normal

      Error: Voltage low

      Normal: Normal

      -

      IG Voltage Value Increased

      +BS voltage value increase detection

      Error or Normal

      Error: Voltage high

      Normal: Normal

      -

    6. While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.

      OK

      Normal is displayed.

      Tip:

      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.