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, BRAKE warning lights, and master caution, SLIP indicator lights come on for approximately 3 seconds. Make sure that the message on the multi information display changes from "CHECK" to "COMPLETE" for 2 seconds.

   HINT:

   If the ECU stores any DTCs, the ABS, BRAKE, VSC warning (multi information display and master caution indicator light) lights, and SLIP indicator light come on.

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

   TROUBLE AREA AND PROCEDURE 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

   Fig 1: Identifying Warning Light And Indicator Light Initial

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 for Test Mode.
   1. Turn the engine switch off.
   2. Connect the intelligent tester to the DLC3.
      Fig 2: Connecting Intelligent Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check that the steering wheel is centered and move the shift lever to the P position.
   4. Turn the engine switch on (IG).
   5. Set the intelligent tester to Test Mode (select "SIGNAL CHECK").
      Fig 3: Selecting "Signal Check" Screen Display

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

   6. Check that the ABS warning light, and master caution indicator light blink and "VSC TEST MODE" is displayed on the multi information display (Test Mode).

      HINT:

      If the ABS and VSC warning (multi information display and master caution indicator light) lights do not blink, inspect the TS and CG terminal circuit, and ABS and VSC warning light circuits.

      TROUBLE AREA AND PROCEDURE CHART
      
      

      Trouble Area	See procedure
      TS and CG terminal circuit	TC 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 4: Identifying Test Mode Blinking Pattern

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

      HINT:

      Fig 5: Identifying Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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 59 N (6 kgf, 13.2 lbf) or more for 1 second or more.

   (The lost booster pressure state is judged normal.)

3. Start the engine depressing the brake pedal with a force of 59 N (6 kgf, 13.2 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 normal.)
5. Leave the vehicle for 1 second or more. (Master cylinder pressure sensor zero point calibration)
   NOTE:

   • If you slowly depress the brake pedal or depress it again, master cylinder pressure sensor zero point calibration is not performed normally.
   • If lost booster pressure judgement check is not completed normally, master cylinder pressure sensor check is not judged.
   • If recheck is performed after the engine has started, end the Test Mode, transit to the Test Mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.

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 come 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 reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at 2 mph (3 km/h) or more.

      HINT:

      Drive the vehicle in reverse and check the speed sensor signal. Note that the sensor check cannot be completed if the vehicle speed is 28 mph (45 km/h) or more.

2. Check the forward signal.
   1. Drive the vehicle straight ahead. Accelerate the vehicle to a speed of 28 mph (45 km/h) or more for several seconds and check that the ABS warning light goes off.

      HINT:

      The sensor check may not be completed if the vehicle has its wheels spun.

3. 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 50 mph (80 km/h), a signal check code will be stored again. Accelerate or stop the vehicle before the speed reaches 50 mph (80 km/h).
   • If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate.
   • If the vehicle is driven in reverse at 28 mph (45 km/h) or more, the sensor check will not be completed.

   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.

4. Check the VSC sensor.

   Check that the master caution indicator light blinks and "VSC TEST MODE" is displayed on the multi information display, and perform the check.

   Fig 6: Identifying Test Mode Blinking Pattern

   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 3 mph (5 km/h), 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 7: Checking Yaw Rate Sensor

      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  , 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 8: Identifying Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • When the yaw rate sensor, acceleration sensor, speed sensor and master cylinder pressure sensor checks are completed, the sensor check is completed.
   • If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.

1. Read the DTC(s) by following the tester screen.
   NOTE:

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

   HINT:

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

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 for Test Mode.
   1. Turn the engine switch off.
   2. Check that the steering wheel is centered and move the shift lever to the P position.
   3. Using SST, connect terminals TS and CG of the DLC3.
      Fig 9: Identifying DLC3 Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      SST 09843-18040 

   4. Turn the engine switch on (IG).
   5. Check that the ABS warning light, and master caution indicator light blink and "VSC TEST MODE" is displayed on the multi information display (Test Mode).

      HINT:

      If the ABS and VSC warning (multi information display and master caution indicator light) lights do not blink, inspect the TS and CG terminal circuit, and ABS and VSC warning light circuit.

      TROUBLE AREA AND PROCEDURE CHART
      
      

      Trouble Area	See procedure
      TS and CG terminal circuit	TC 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 10: Identifying Test Mode Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Check the ABS sensor.
      Fig 11: Identifying Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

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 59 N (6 kgf, 13.2 lbf) or more for 1 second or more. (The lost booster pressure state is judged normal.)
3. Start the engine depressing the brake pedal with a force of 59 N (6 kgf, 13.2 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 normal.)
5. Leave the vehicle for 1 second or more. (Master cylinder pressure sensor zero point calibration)
   NOTE:

   • If you slowly depress the brake pedal or depress it again, master cylinder pressure sensor zero point calibration is not performed normally.
   • If lost booster pressure judgement check is not completed normally, master cylinder pressure sensor check is not judged.
   • If recheck is performed after the engine has started, end the Test Mode, transit to the Test Mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.

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 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 the 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 reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at 2 mph (3 km/h) or more.

      HINT:

      Drive the vehicle in reverse and check the speed sensor signal. Note that the sensor check cannot be completed if the vehicle speed is 28 mph (45 km/h) or more.

2. Check the forward signal.
   1. Drive the vehicle straight ahead. Accelerate the vehicle to a speed of 28 mph (45 km/h) or more for several seconds and check that the ABS warning light goes off.

      HINT:

      The sensor check may not be completed if the vehicle has its wheels spun.

3. 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, if vehicle speed exceeds 50 mph (80 km/h), a signal check code will be stored again. Accelerate or stop the vehicle before the speed reaches 50 mph (80 km/h).
   • If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate.
   • If the vehicle is driven in reverse at 28 mph (45 km/h) or more, the sensor check will not be completed.

   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.

4. Check the VSC sensor.

   Check that the master caution indicator light blinks and "VSC TEST MODE" is displayed on the multi information display, and perform the check.

   Fig 12: Identifying Test Mode Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the output of the yaw rate sensor.
   1. Keep the vehicle stationary 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 vehicle speed of approximately 3 mph (5 km/h) and turn the steering wheel either to the left or right 90° or more and 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 13: Checking Yaw Rate Sensor

      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  , 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 14: Identifying Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • When the yaw rate sensor, acceleration sensor, speed sensor and master cylinder pressure sensor checks are completed, the sensor check is completed.
   • If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.

1. Using SST, connect terminals TS and CG, TC and CG of the DLC3.
   Fig 15: Identifying Connector Terminals DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   SST 09843-18040 

2. Count the number of blinks of the ABS warning light and read "DIAG VSC" on the multi information display.
   Fig 16: Identifying ABS Warning Light Blinking Pattern And Read "DIAG VSC" On Multi Information Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

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

   HINT:

   • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
   • See the list of DTC (See procedure "A").
3. After performing the check, disconnect the SST from terminals TS and CG, and TC and CG of the DLC3 and turn the engine switch off.
4. Turn the engine switch on (IG).

   HINT:

   • If the engine switch is not turned on (IG) after the SST is removed from the DLC3, the previous Test Mode will continue.
   • If the engine switch is turned on (IG) with terminals TS and CG shorted, the previous Test Mode will continue.

ABS sensor: 

VSC sensor: 

HINT:

The codes in this table are output only in Test Mode (signal check).