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 ignition switch is turned on (IG), check that the ABS warning light, VSC warning light, BRAKE warning light and SLIP indicator light come on for approximately 3 seconds.

HINT:

If the skid control ECU stores any DTCs, the ABS warning light, VSC warning light and SLIP indicator light come on.

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

Fig 1: Identifying ABS Warning Light, VSC Warning Light & SLIP Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

USING HAND HELD TESTER: 

When having replaced the ABS & TRACTION actuator assy and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor (see CALIBRATION ).

HINT:

• If the ignition switch is turned from on (IG) to on (ACC) or to the 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 normality is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure for test mode.
   1. Turn the ignition switch off.
   2. Connect the hand held tester to the DLC3. (see Figure)
   3. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
   4. Turn the ignition switch on (IG).
   5. Set the hand held tester to test mode (select "SIGNAL CHECK").

      HINT:

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

      Fig 2: Identifying Hand-Held Tester Display - SIGNAL CHECK

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Check that the ABS and VSC warning lights are blinking in TEST MODE.

HINT:

If the ABS and VSC warning lights do not blink, inspect the ABS warning light circuit and/or VSC warning light circuit.

Fig 3: Identifying Test Mode Blinking Pattern (ABS & VSC Warning Lights)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ABS SENSOR CHECK 

HINT:

Check that ABS warning light is blinking in TEST MODE and perform the check (steps 3 to 5).

Fig 4: Identifying Test Mode Blinking Pattern (ABS Warning Light)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

HINT:

Deceleration sensor check can be performed with the following master cylinder pressure sensor check.

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second or more.
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 brake pedal operation above is performed.

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

   HINT:

   Drive the vehicle in reverse and check the speed sensor signal. Note that the signal 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 forward.

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

   HINT:

   The signal check may not be completed if the vehicle has its wheels spun or the steering wheel turned during this check.

3. Stop the vehicle.

HINT:

When the signal check has been completed, the ABS warning light goes off while driving and blinks in the test mode pattern while stationary.

VSC SENSOR CHECK 

HINT:

Check that the VSC warning light is blinking in TEST MODE and perform the check (step 6).

1. Check the VSC warning light is blinking in TEST MODE.
2. Check the zero point voltage of the yaw rate sensor.
   1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
      Fig 5: Identifying Test Mode Blinking Pattern (VSC Warning Light)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the output of the yaw rate sensor and the direction of the steering angle sensor.
   1. Move the shift lever to the D position and drive the vehicle at a speed of approximately 3 mph (5 km/h), turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
   2. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.
      Fig 6: Identifying Output Of Yaw Rate Sensor & Direction Of Steering Angle Sensor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the skid control buzzer sounds, the signal 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 signal 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 ignition switch off while turning.
• Do not move the shift lever to the P position while turning, but change 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 when the vehicle is driving.

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

HINT:

See the list of DTC (refer to step 9).

ABS sensor: 

Fig 8: Test Mode Function DTC ABS Speed Sensor (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 9: Test Mode Function DTC ABS Speed Sensor (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VSC sensor: 

HINT:

• The codes in this table are output only in test mode (SIGNAL CHECK).
• See the referred to in the table to proceed with troubleshooting.
• After troubleshooting is completed, check that no DTCs are output (see DTC CHECK/CLEAR  )

USING SST CHECK WIRE: 

When having replaced the ABS & TRACTION actuator assy and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor (see CALIBRATION ).

HINT:

• If the ignition 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 normality is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure for test mode.
   1. Turn the ignition switch off.
   2. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
   3. Using SST, connect terminals TS and CG of the DLC3.

      SST 09843-18040

   4. Turn the ignition switch on (IG).
      Fig 10: Identifying DLC3 Connector Terminals TS & CG

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Check that the ABS and VSC warning lights are blinking in TEST MODE.

HINT:

If the ABS and VSC warning lights do not blink, inspect the ABS warning light circuit and/or VSC warning light circuit.

Fig 11: Identifying Test Mode Blinking Pattern (ABS & VSC Warning Lights)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ABS SENSOR CHECK 

HINT:

Check that the ABS warning light is blinking in TEST MODE and perform the check (step 11 to 13).

Fig 12: Identifying Test Mode Blinking Pattern (ABS Warning Light)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

HINT:

Deceleration sensor check can be performed with the following master cylinder pressure sensor check.

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second or more.
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 the brake pedal operation above is performed.

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

   HINT:

   Drive the vehicle in reverse and check the speed sensor signal. Note that the signal 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 forward.

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

   HINT:

   The signal check may not be completed if the vehicle has its wheels spun or the steering wheel turned during this check.

3. Stop the vehicle.

HINT:

When the signal check has been completed, the ABS warning light goes off while driving and blinks in the test mode pattern while stationary.

VSC SENSOR CHECK 

HINT:

Check that the VSC warning light is blinking in TEST MODE and perform the check (step 14).

1. Check that the VSC warning light is blinking in TEST MODE.
2. Check the zero point voltage of the yaw rate sensor.
   1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
      Fig 13: Identifying Test Mode Blinking Pattern (VSC Warning Light)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the output of the yaw rate sensor and the direction of the steering angle sensor.
   1. Move the shift lever to the D position and drive the vehicle at a speed of approximately 3 mph (5 km/h), turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
   2. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.
      Fig 14: Identifying Start Position & End Position Of Vehicle

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the skid control buzzer sounds, the signal 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 signal 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 ignition switch off while turning.
• Do not move the shift lever to the P position while turning, but change 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 when the vehicle is driving.

1. Using SST, connect terminals TC and CG of the DLC3.

   SST 09843-18040

2. Read the number of blinks of the ABS and VSC warning lights.
   Fig 16: Identifying DLC3 Connector Terminals TC & CG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • If only the DTCs are displayed, repair the malfunction area and clear the DTCs. Check if the ABS and VSC warning lights are normal system codes.
   • 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 (refer to step  17).
     Fig 17: Identifying Test Mode Blinking Pattern (Normal)

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 18: Identifying Trouble Code Blinking Pattern (Example Codes 71 & 72)

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. After performing the check, disconnect the SST from terminals TS and CG, TC and CG of the DLC3 and turn the ignition switch off.
4. Turn the ignition switch on (IG).

HINT:

If the ignition switch is not turned on (IG) after the SST is removed from the DLC3, the previous TEST MODE will continue.

ABS sensor: 

Fig 19: Test Mode Function DTC Table (ABS Sensor)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VSC sensor: 

HINT:

• The codes in this table are output only in test mode (SIGNAL CHECK).
• See the referred to in the table to proceed with troubleshooting.
• After troubleshooting is completed, check that no DTCs are output (see DTC CHECK/CLEAR  )