Using SST Check Wire:

When having replaced the master cylinder solenoid and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor.

HINT:

• If the ignition switch is turned from the ON to the ACC or LOCK position during test mode, DTCs of the signal check function will be erased.
• During test mode, the ECU records all DTCs of the signal check function. By performing the signal check, the codes are erased if normality is confirmed. The codes left over are the codes where an abnormality was found.

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 to the ON position.
   Fig 1: Identifying Connector Terminals TS And CG Of DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Check that the ABS and VSC TRAC warning lights blink in test mode.

   HINT:

   If the ABS and VSC TRAC warning lights do not blink, inspect the TS and CG terminal circuit and the ABS and VSC TRAC warning light circuits.

   TROUBLE AREA AND EXAMPLE
   
   

   Trouble Area	See Example
   TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
   ABS warning light circuit	ABS WARNING LIGHT CIRCUIT (REMAINS ON)  ABS WARNING LIGHT CIRCUIT (DOES NOT COME ON)
   VSC TRAC warning light circuit	VSC TRAC WARNING LIGHT CIRCUIT (REMAINS ON)  VSC TRAC WARNING LIGHT CIRCUIT (DOES NOT COME ON)

   Fig 2: Identifying ABS And VSC TRAC Warning Lights Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Start the engine.
7. Using a check wire, perform the ABS sensor (deceleration sensor, master cylinder pressure sensor, center diff. lock detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate sensor and DAC operation switch) signal checks in test mode (ABS sensor: refer to step 2 to 7, VSC sensor: refer to step 8 to 10).

1. Check that the ABS warning light is blinking in test mode.
2. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
   Fig 3: Identifying ABS Warning Lights Blinking Pattern - Deceleration Sensor Signal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. 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.

   HINT:

   • At this time, the ABS warning light stays on for 3 seconds.
   • 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.
     Fig 4: Identifying ABS Warning Lights Blinking Pattern - Master Cylinder Pressure Sensor Signal

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.

1. Check that the ABS warning light is blinking in test mode.
2. Check the center diff. lock switch.
   1. Push the center diff. lock switch on to lock the center differential.
   2. Push the center diff. lock switch off to unlock the center differential.
      Fig 5: Identifying ABS Warning Lights Blinking Pattern - Center Diff Lock Detection Switch Signal(4Wd)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. Check the 4WD control (L4) switch.
   1. Turn the H-L switch to the L position to put the vehicle in L4 mode.
   2. Turn the H-L switch to the H position to put the vehicle in H4 mode.
      Fig 6: Identifying ABS Warning Lights Blinking Pattern - L4 Detection Switch Signal(4WD)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. 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 complete if the vehicle speed is 28 mph (45 km/h) or more.

3. Check the forward signal.
   1. Drive the vehicle straight forward.

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

      Fig 7: Identifying ABS Warning Lights Blinking Pattern - Speed Sensor Signal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

4. Stop the vehicle.
   NOTE:

   • Before performing the speed sensor signal check, complete the deceleration sensor, master cylinder pressure sensor, center diff. lock detection switch and L4 detection switch signal checks.
   • The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels.
   • After the ABS warning light goes off, if the vehicle speed exceeds 50 mph (80 km/h), signal check code will be stored again. Decelerate or stop 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.

   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.

1. Using SST, connect terminals TC and CG of the DLC3. SST 09843-18040
2. Read the number of blinks of the ABS warning light.

   HINT:

   • See the list of DTC (refer to step 11).
   • If every sensor is normal, the normal system code is output. (A cycle of 0.25 second ON and 0.25 second OFF is repeated.)
   • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
     Fig 8: Identifying Connector Terminals TS And CG Of DLC3

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 9: Identifying Blinks of ABS Warning Light

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. After the check, disconnect the SST from terminals TC and CG of the DLC3.

1. Check that the VSC TRAC 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.
3. Check the output of the yaw rate sensor and the direction of the steering angle sensor.
   Fig 10: Identifying VSC TRAC Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Shift the shift lever to the D position and drive the vehicle at a vehicle speed of approx. 3 mph (5 km/h), turn the steering wheel either to the left or right 90° or more, and turn the vehicle through 180 degrees.
   2. Stop the vehicle and shift the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.
      Fig 11: Checking Output Of Yaw Rate 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  ), then perform the signal check again.
   • If the skid control buzzer still won't sound, there is a malfunction in the yaw rate sensor, so check the DTC.
   • Drive the vehicle in a 180° circle. 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.

1. Check that the VSC TRAC warning light is blinking in test mode.
2. Check the DAC switch.
   1. Push the DAC switch on.
   2. Push the DAC switch off.
      Fig 12: Identifying VSC TRAC Warning Light Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using SST, connect terminals TC and CG of the DLC3. SST 09843-18040
2. Read the number of blinks of the VSC TRAC warning light.

   HINT:

   • See the list of DTC (refer to step 11).
   • If every sensor is normal, the normal system code is output. (A cycle of 0.25 second ON and 0.25 second OFF is repeated.)
   • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
     Fig 13: Identifying Connector Terminals TS And CG Of DLC3

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 14: Identifying VSC TRAC Warning Light Blinking Pattern

     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.

ABS sensor: 

Fig 15: ABS Sensor Diagnosis And Trouble Area Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

(*1): 4WD

VSC sensor: 

HINT:

The codes in this table are output only in test mode (signal check).

USING HAND-HELD TESTER: 

When having replaced the master cylinder solenoid and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor.

HINT:

• If the ignition switch is turned from the ON to the ACC or LOCK position during test mode, DTCs of the signal check function will be erased.
• During test mode, the ECU records all DTCs of the signal check function. By performing the signal check, the codes are erased if normality is confirmed. The codes left over are the codes where an abnormality was found.

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. Connect the hand-held tester to the DLC3.
4. Turn the ignition switch to the ON position.
5. Operate the hand-held tester in test mode ("SIGNAL CHECK").
   Fig 16: Connecting Hand-Held Tester To Dlc3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 17: Identifying Flow Chart To Signal Check

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Check that the ABS and VSC TRAC warning lights blink in test mode.

   HINT:

   If the ABS and VSC TRAC warning lights do not blink, inspect the TS and CG terminal circuit and the ABS and VSC TRAC warning light circuits.

   Fig 18: Identifying ABS And VSC TRAC Warning Lights Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TROUBLE AREA AND EXAMPLE
   
   

   Trouble Area	See Example
   TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
   ABS warning light	ABS WARNING LIGHT CIRCUIT (REMAINS ON)  ABS WARNING LIGHT CIRCUIT (DOES NOT COME ON)
   VSC TRAC warning light	VSC TRAC WARNING LIGHT CIRCUIT (REMAINS ON)  VSC TRAC WARNING LIGHT CIRCUIT (DOES NOT COME ON)

7. Start the engine.
8. Using the hand-held tester, perform the ABS sensor (deceleration sensor, master cylinder pressure sensor, center diff. lock detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate sensor and DAC operation switch) signal checks in test mode (ABS sensor: refer to step 13 to 18, VSC sensor: refer to step 19 to 21).

1. Check that the ABS warning light is blinking in test mode.
2. Keep the vehicle in the stationary condition on a level surface for 1 second or more.
   Fig 19: Identifying ABS And VSC TRAC Warning Lights Blinking Pattern - Deceleration Sensor Signal Check

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. 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.

   HINT:

   • At this time, the ABS warning light stays on for 3 seconds. 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.
     Fig 20: Identifying ABS Warning Light Blinking Pattern

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. Check the center diff. lock switch.
   1. Push the center diff. lock switch on to lock the center differential.
   2. Push the center diff. lock switch off to unlock the center differential.
      Fig 21: Identifying ABS Warning Light Blinking Pattern - Lock Detection Switch Signal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. Check the 4WD control (L4) switch.
   1. Turn the H-L switch to the L position to put the vehicle in L4 mode.
   2. Turn the H-L switch to the H position to put the vehicle in H4 mode.
      Fig 22: Identifying ABS Warning Light Blinking Pattern - L4 Detection Switch Signal (4WD)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. 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 complete if the vehicle speed is 28 mph (45 km/h) or more.

3. Check the forward signal.
   1. Drive the vehicle straight forward.

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

      Fig 23: Identifying ABS Warning Light Blinking Pattern - Speed Sensor Signal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

4. Stop the vehicle.
   NOTE:

   • Before performing the speed sensor signal check, complete the deceleration sensor, master cylinder pressure sensor, center diff. lock detection switch and L4 detection switch signal checks.
   • The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels.
   • After the ABS warning light goes off, if the vehicle speed exceeds 50 mph (80 km/h), a signal check code will be stored again. Decelerate or stop 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.

   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.

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

   HINT:

   • Refer to the hand-held tester operator's manual for further details.
   • See the list of DTC (refer to step 22).

1. Check that the VSC TRAC 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.
3. Check the output of the yaw rate sensor and the direction of the steering angle sensor.
   Fig 24: Identifying VSC TRAC Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Shift the shift lever to the D position and drive the vehicle at a vehicle speed of approx. 3 mph (5 km/h), turn the steering wheel either to the left or right 90° or more, and turn the vehicle through 180 degrees.
   2. Stop the vehicle and shift the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.
      Fig 25: Checking Output Of Yaw Rate 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  , then perform the signal check again.
   • If the skid control buzzer still won't sound, there is a malfunction in the yaw rate sensor, so check the DTC.
   • Drive the vehicle in a 180° circle. 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.

1. Check that the VSC TRAC warning light is blinking in test mode.
2. Check the DAC switch.
   1. Push the DAC switch on.
   2. Push the DAC switch off.
      Fig 26: Identifying VSC TRAC Warning Light Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   HINT:

   • Refer to the hand-held tester operator's manual for further details.
   • See the list of DTC (refer to step 22).

ABS sensor: 

Fig 27: ABS Sensor Diagnosis And Trouble Area Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

(*1): 4WD

VSC sensor: 

HINT:

The codes in this table are output only in test mode (signal check).