VEHICLE STABILITY CONTROL SYSTEM DIAGNOSIS SYSTEM

DESCRIPTION

When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the GTS to the vehicle and reading various data output from the vehicle's skid control ECU (brake actuator assembly).

The skid control ECU (brake actuator assembly) records DTCs when the ECU detects a malfunction in the ECU itself or in its circuits.

To check the DTCs, connect the GTS to the DLC3 on the vehicle. The GTS enables you to clear the DTCs, activate the 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 (brake actuator assembly) 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 SST between terminals TC and CG of the DLC3 and observing the blinking pattern of the ABS warning and slip indicator lights, or by connecting the GTS.

      Click here

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

      Click here

   WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

   
   

   1. When the ignition switch is turned to ON, check that the ABS warning, brake warning, VSC OFF indicator, TRC OFF indicator*1, downhill assist control indicator*2 and slip indicator lights come on for approximately 3 seconds.

      Tech Tips

      
      

      • When the brake fluid level is low, the brake warning light comes on.

      • If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning, brake warning, VSC OFF indicator, TRC OFF indicator*1, downhill assist control indicator*2 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.

      
      

      • *1: except Multi-information Display Type

      • *2: w/ Downhill Assist Control

   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
   VSC OFF indicator light circuit (Remains on)	Click here
   VSC OFF indicator light circuit (Does not come on)	Click here
   TRC OFF indicator light circuit (Remains on)*1	Click here
   TRC OFF indicator light circuit (Does not come on)*1	Click here
   Slip indicator light circuit (Remains on)	Click here
   Slip indicator light circuit (Does not come on)	Click here
   Downhill assist control indicator light circuit (Remains on)*2	Click here
   Downhill assist control indicator light circuit (Does not come on)*2	Click here