Test Mode Procedure

1. Release the parking brake.
   NOTE: Before releasing the parking brake, move the shift lever to the P position for safety.

   HINT:

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

2. When the engine switch is turned on (IG), check that the ABS warning, BRAKE warning, SLIP indicator, and master caution indicator lights come on for approximately 3 seconds.
   Fig 1: Identifying ABS Warning Light And Master Indicator Light

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Make sure that the message on the multi information display changes from "CHECK" to "COMPLETED" for 2 seconds.
   Fig 2: Information Display - CHECK To COMPLETED

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   If the ECU stores a DTC, the ABS warning, BRAKE warning and SLIP indicator lights will come on. If the vehicle is equipped with a multi information display, and the vehicle stores a DTC, the master caution indicator light will illuminate, and the multi information display will indicate a malfunction. In this case, the ABS warning, BRAKE warning, and SLIP indicator lights will also come on.

   If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

   TROUBLESHOOTING CHART
   
   

   Trouble Area	See procedure
   ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  or ABS WARNING LIGHT DOES NOT COME ON
   BRAKE warning light circuit	BRAKE WARNING LIGHT REMAINS ON  or BRAKE WARNING LIGHT DOES NOT COME ON
   VSC warning light circuit	VSC WARNING LIGHT REMAINS ON  or VSC WARNING LIGHT DOES NOT COME ON
   SLIP indicator light circuit	SLIP INDICATOR LIGHT REMAINS ON  or SLIP INDICATOR LIGHT DOES NOT COME ON

HINT:

• If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs of the signal check function will be erased.
• During Test Mode (signal check), the skid control ECU records all DTCs of the signal check function. By performing the Test Mode (signal check), the codes are erased if a normal condition is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure to enter Test Mode.
   1. Turn the engine switch off.
   2. Connect the intelligent tester to the DLC3.
   3. Check that the steering wheel is centered and move the shift lever to the P position.
   4. Turn the engine switch on (IG).
      Fig 3: Connecting Intelligent Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Set the intelligent tester to Test Mode (select "SIGNAL CHECK").

      HINT:

      Refer to the intelligent tester operator's manual for further details.

      Fig 4: Intelligent Tester Display - Signal Check

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Check that the ABS warning light blinks and "VSC TEST MODE" is displayed on the multi information display (Test Mode).

      HINT:

      • The SLIP indicator light remains on during Test Mode because TRAC is prohibited.
      • If the ABS and VSC warning (multi information display) lights do not blink, inspect the TS and CG terminal circuit, and ABS and VSC warning light circuits.
        TROUBLESHOOTING CHART
        
        

        Trouble Area	See procedure
        TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
        ABS warning light circuit	ABS WARNING LIGHT DOES NOT COME ON
        VSC warning light circuit	VSC WARNING LIGHT DOES NOT COME ON

        Fig 5: ABS Warning Light Blinking Pattern

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Check the ABS sensor.

      HINT:

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

      Fig 6: ABS Warning Light Blinking Pattern In Test Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Keep the vehicle stationary on a level surface for 1 second or more.

   HINT:

   Acceleration sensor check can be performed with the master cylinder pressure sensor check below.

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.
2. Check that the ABS warning light stays on for 3 seconds.

   HINT:

   • Ensure that the ABS warning light comes on.
   • While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.
   • The ABS warning light comes on for 3 seconds every time brake pedal operation above is performed.
   • If the check of the master cylinder pressure sensor is not completed, depressing the brake pedal causes further decrease in the negative pressure, making the sensor check difficult to be completed.
   • If the negative pressure is insufficient, the master cylinder pressure sensor check may not be completed. In this case, run the engine at idle to obtain sufficient negative pressure.
   • If the brake pedal is strongly depressed when the negative pressure is insufficient, the BRAKE warning light may come on in accordance with the booster pressure control. In this case, run the engine at idle to obtain sufficient negative pressure.

1. Check the speed sensor signal.
   1. Drive the vehicle straight ahead.

      Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.

      HINT:

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

2. Stop the vehicle.
   NOTE:

   • Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.
   • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
   • After the ABS warning light goes off and if the vehicle speed exceeds 80 km/h (50 mph), a signal check code will be stored again. Accelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
   • If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate.

   HINT:

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

3. Check the VSC sensor.

   Check that the "VSC TEST MODE" is displayed on the multi information display, and perform the check.

   Fig 7: Display In VSC TEST MODE

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the output of the yaw rate sensor.
   1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
   2. Move the shift lever from P to the D position and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
   3. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.
      Fig 8: Identifying Start And End Position Of Vehicle

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      • If the skid control buzzer sounds, the sensor check is completed normally.
      • If the skid control buzzer does not sound, check the skid control buzzer circuit (See SKID CONTROL BUZZER CIRCUIT  ), then perform the sensor check again.
      • If the skid control buzzer still does not sound, there is a malfunction in the yaw rate sensor, so check the DTC.
      • Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +-5° of its start position.
      • Do not spin the wheels.
      • Do not turn the engine switch off while turning.
      • Do not move the shift lever to the P position while turning, but changing in the vehicle speed, stopping, or driving in reverse is possible.
      • Complete the turn within 20 seconds.

1. If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is driving.
   Fig 9: ABS Warning Light Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002