VEHICLE STABILITY CONTROL SYSTEM DIAGNOSIS SYSTEM

DESCRIPTION

When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the GTS to the vehicle and reading various data output from the skid control ECU.

The skid control ECU records DTCs when it detects a malfunction in itself or in its circuits.

To check for DTCs, connect the GTS to the DLC3 on the vehicle. The GTS can be used to clear the DTCs, activate various actuators, and check the Freeze Frame Data and Data List.

1. Check the battery voltage.

   If the voltage is below 11 V, recharge the battery before proceeding to the next step.

   Check the DLC3 Click here.

   DIAGNOSIS

   
   

   1. If the skid control ECU detects a malfunction, the ABS warning, brake warning, and/or slip indicator lights will come on in order to warn the driver.

   2. The DTCs are simultaneously stored in memory.

      The DTCs can be read by connecting the GTS Click here.

   3. This system has a Test Mode (signal check) function.

      The DTCs can be read by connecting the GTS Click here.

   WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

   
   

   1. Release the parking brake.

      Note

      Before releasing the parking brake, move the shift lever to P (for automatic transmission) or set chocks to prevent the vehicle from rolling.

      Tech Tips

      When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

   2. When the ignition switch is turned to ON, check that the ABS warning, brake warning, TRC OFF indicator, VSC OFF indicator, VSC SPORT indicator and slip indicator lights all come on.

      Tech Tips

      
      

      • If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning, brake warning, TRC OFF indicator, VSC OFF indicator, VSC SPORT indicator and slip indicator light circuits.

      • If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

   Trouble Area	See Procedure
   ABS warning light circuit (Remains on)	Click here
   ABS warning light circuit (Does not come on)	Click here
   Brake warning light circuit (Remains on)	Click here
   Brake warning light circuit (Does not come on)	Click here
   TRC OFF indicator light circuit (Remains on)	Click here
   TRC OFF indicator light circuit (Does not come on)	Click here
   VSC OFF indicator light circuit (Remains on)	Click here
   VSC OFF indicator light circuit (Does not come on)	Click here
   VSC SPORT indicator light circuit (Remains on)	Click here
   VSC SPORT indicator light circuit (Does not come on)	Click here
   Slip indicator light circuit (Remains on)	Click here
   Slip indicator light circuit (Does not come on)	Click here