VEHICLE STABILITY CONTROL SYSTEM CHECK FOR INTERMITTENT PROBLEMS

CHECK FOR INTERMITTENT PROBLEMS

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.