VEHICLE STABILITY CONTROL SYSTEM TEST MODE PROCEDURE

WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (for Using an Intelligent Tester)

Tech Tips

DTCs are stored if any malfunctions are detected during each sensor check.

1. Procedure to enter Test Mode.

   
   

   1. Turn the engine switch off.

   2. Check that the steering wheel is in the straight-ahead position.

   3. Check that the shift lever is in P.

   4. Connect the intelligent tester to the DLC3.

   5. Turn the engine switch on (IG).

   6. Turn the intelligent tester on.

   7. Switch the skid control ECU to Test Mode using the intelligent tester. Enter the following menus: Chassis / ABS/VSC/TRC / Signal Check.

   8. Check that the ABS warning light and SLIP indicator light come on for several seconds in Test Mode.

      Tech Tips

      If the ABS warning light and SLIP indicator light do not blink, inspect the TS and CG terminal circuit and ABS warning and SLIP indicator light circuits.

      Trouble Area	See Procedure
      TS and CG terminal circuit	Click here
      ABS warning light circuit (Remains on)	Click here
      ABS warning 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

   9. 

      Check the ABS sensor.

      Tech Tips

      Check that the ABS warning light is blinking in Test Mode and perform the check.

VSC OFF SWITCH CHECK (for Using an Intelligent Tester)

1. Turn the engine switch on (IG).

2. Check that the VSC OFF indicator light is not illuminated.

3. Check that the TRC OFF message is displayed on the multi-information display.

4. Perform either of the following to inspect the VSC OFF switch.

   
   

   1. Check that the VSC OFF indicator light changes from off to on when the VSC OFF switch is pressed and held for 3 seconds or more.

   2. Check that the TRC OFF message on the multi-information display goes from displayed to not displayed when the VSC OFF switch is pressed but not held for 3 seconds or more.

VACUUM FAILURE CHECK (for Using an Intelligent Tester)

1. Turn the engine switch on (IG).

2. Check that the brake warning light comes on when depressing the brake pedal with a force of 66 N (7 kgf, 14.7 lbf) or more for 1 second or more. (The lost booster pressure state is judged to be normal.)

3. Start the engine depressing the brake pedal with a force of 66 N (7 kgf, 14.7 lbf) or more for 1 second or more.

4. Check that the brake warning light goes off when quickly releasing the brake pedal. (The lost booster pressure state is judged to be normal.)

   If the lost booster pressure state is not judged to be normal, the brake warning light blinks continuously and DTC ABS81 (C1281) is recorded.

5. Leave the vehicle as is for 1 second or more.

   Note

   
   

   • If the lost booster pressure judgment check is not completed normally, the master cylinder pressure sensor check is not judged.

   
   

   • If a recheck is performed after the engine has started, end the Test Mode, enter Test Mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.

SPEED SENSOR CHECK (for Using an Intelligent Tester)

1. Drive the vehicle straight-ahead.

   Accelerate the vehicle to a speed of 55 km/h (34 mph) or more for several seconds, and then depress the brake pedal.

2. Check that the ABS warning light goes off.

   Tech Tips

   
   

   • The sensor check may not be completed if wheel spin occurs.

   • The ABS warning light goes off when the sensor check has been completed and the brake pedal is depressed.

   • The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.

3. Stop the vehicle.

   Note

   
   

   • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.

   • If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS system will not operate.

   Tech Tips

   When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while stationary.

END OF SENSOR CHECK (for Using an Intelligent Tester)

READ DTC OF SENSOR CHECK FUNCTION (for Using an Intelligent Tester)

1. Read the DTC(s) by following the tester display.

   Note

   
   

   • If only the DTCs are displayed, repair the malfunction area and clear the DTCs.

   • If the DTCs or Test Mode codes (DTC of sensor check function) are displayed, repair the malfunction area, clear the DTCs and perform Test Mode inspection.

   Tech Tips

   See the list of DTC (See procedure "A").

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (for Using an SST Check Wire)

VSC OFF SWITCH CHECK (for Using an SST Check Wire)

1. Turn the engine switch on (IG).

2. Check that the VSC OFF indicator light is not illuminated.

3. Check that the TRC OFF message is displayed on the multi-information display.

4. Perform either of the following to inspect the VSC OFF switch.

   
   

   1. Check that the VSC OFF indicator light changes from off to on when the VSC OFF switch is pressed and held for 3 seconds or more.

   2. Check that the TRC OFF message on the multi-information display goes from displayed to not displayed when the VSC OFF switch is pressed but not held for 3 seconds or more.

VACUUM FAILURE CHECK (for Using an SST Check Wire)

1. Turn the engine switch on (IG).

2. Check that the brake warning light comes on when depressing the brake pedal with a force of 66 N (7 kgf, 14.7 lbf) or more for 1 second or more. (The lost booster pressure state is judged to be normal.)

3. Start the engine depressing the brake pedal with a force of 66 N (7 kgf, 14.7 lbf) or more for 1 second or more.

4. Check that the brake warning light goes off when quickly releasing the brake pedal. (The lost booster pressure state is judged to be normal.)

   If the lost booster pressure state is not judged to be normal, the brake warning light blinks continuously and DTC ABS81 (C1281) is recorded.

5. Leave the vehicle as is for 1 second or more.

   Note

   
   

   • If the lost booster pressure judgment check is not completed normally, the master cylinder pressure sensor check is not judged.

   
   

   • If a recheck is performed after the engine has started, end the Test Mode, enter Test Mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.

SPEED SENSOR CHECK (for Using an SST Check Wire)

1. Drive the vehicle straight-ahead.

   Accelerate the vehicle to a speed of 55 km/h (34 mph) or more for several seconds, and then depress the brake pedal.

2. Check that the ABS warning light goes off.

   Tech Tips

   
   

   • The sensor check may not be completed if wheel spin occurs.

   • The ABS warning light goes off when the sensor check has been completed and the brake pedal is depressed.

   • The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.

3. Stop the vehicle.

   Note

   
   

   • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.

   • If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS system will not operate.

   Tech Tips

   When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while stationary.

END OF SENSOR CHECK (for Using an SST Check Wire)

READ DTC OF SENSOR CHECK FUNCTION (for Using an SST Check Wire)

DTC OF SENSOR CHECK FUNCTION (Procedure "A")

ENGINE VARIANT LEARNING

1. Perform engine variant learning.

   Tech Tips

   
   

   • Engine variant learning is automatically performed immediately after the Test Mode is entered.

   • The ABS warning, brake warning and SLIP indicator lights come on for 3 seconds after learning.