Test Mode Procedure

1. Release the parking brake lever.
   NOTE: When releasing the parking brake, set the chocks to hold the vehicle 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 to the ON position, 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 warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning light circuit, VSC warning light circuit, BRAKE warning light circuit or SLIP indicator light circuit.

If the indicator remains on, proceed to troubleshooting for the light circuit below.

Fig 1: Identifying ABS Warning Light And SLIP Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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

1. Procedures 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 to the ON position.
      Fig 2: Identifying DLC3 Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Check that the ABS warning light and VSC warning light blink as shown in illustration.

      HINT:

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

      TROUBLE AREA AND REFERENCE PAGES
      
      

      Trouble area
      ABS WARNING LIGHT CIRCUIT
      VSC WARNING LIGHT CIRCUIT
      TS AND CG TERMINAL CIRCUIT

      Fig 3: Identifying ABS Warning Light Blinking Pattern (1 Of 4)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Start the engine.
2. Perform test mode using check wire (step 3 to 7).

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 4: Identifying ABS Warning Light Blinking Pattern (2 Of 4)

   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 the brake pedal in free condition 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) or more.
• The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
• If master cylinder pressure sensor check can not be completed, do not depress the brake pedal frequently. It may further reduce negative pressure and make the sensor check difficult to complete.
• If the negative pressure is insufficient, master cylinder pressure sensor check may not be completed. In this case, idle the engine to get enough negative pressure.
• If the brake pedal is depressed during engine stop, negative pressure may become insufficient and the BRAKE warning light may come on. (It runs the motor and performs incorrect control.)
  Fig 5: Identifying ABS Warning Light Blinking Pattern (3 Of 4)

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the ABS warning light is blinking in TEST MODE.
2. Drive vehicle straight forward.
   1. 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.

   HINT:

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

3. Stop the vehicle.
   Fig 6: Identifying ABS Warning Light Blinking Pattern (4 Of 4)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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

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 the step 14).
   • If every sensor is normal, the normal 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 1st.
     Fig 7: Identifying DLC3 Connector Terminals

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 8: Identifying ABS Warning Light Blinking Pattern (Trouble Code 72 76)

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

1. Check the VSC warning light is blinking in TEST MODE.
2. 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 left or right 90° or more, and maintain 180° circular drive for the vehicle.
3. Stop the vehicle and shift the shift lever to the P position.
   1. Check that the skid control buzzer sounds for 3 sec.
      Fig 9: Identifying Start And End Position

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

   SST 09843-18040

5. Read the number of blinks of the VSC warning light.

   HINT:

   • See the list of DTC (see DTC CHECK/CLEAR ).
   • If every sensor is normal, there is a normal code output. (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated.)
   • If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.
     Fig 10: Identifying DLC3 Connector Terminals

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 11: Identifying VSC Warning Light Blinking Pattern (Trouble Code 71, 72)

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. After performing the check, disconnect the SST from terminals TS and CG, TC and CG of the DLC3 and turn the ignition switch off.

When having replaced the yaw rate sensor (deceleration sensor) and/or ABS & TRACTION actuator assy (skid control ECU), perform zero point calibration of the yaw rate sensor 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 sensor check function will be erased.
• During test mode, ECU records all DTCs of sensor check functions. By performing the sensor signal check, the codes are erased if normality is confirmed. The codes left over are the codes where an abnormality was found.

1. Procedures for test mode.
   1. Turn the ignition switch off.
   2. Check that the shift lever is in the P position.
   3. Connect the hand-held tester to the DLC3.
   4. Turn the ignition switch to the ON position.
      Fig 12: Connecting Hand-Held Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 13: Diagnostic Procedure Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Operate the hand-held tester in test mode (SIGNAL CHECK).
   6. Check that the ABS warning light and VSC warning light blink.

      HINT:

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

      TROUBLE AREA AND REFERENCE PAGES
      
      

      Trouble area
      ABS WARNING LIGHT CIRCUIT
      VSC WARNING LIGHT CIRCUIT
      TS AND CG TERMINAL CIRCUIT

   7. Start the engine.
2. Perform test mode using hand-held tester (step 9 to 13).

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 14: Identifying ABS Warning Light Blinking Pattern In Test Mode (1 Of 3)

   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 the brake pedal in a free condition 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.
   Fig 15: Identifying ABS Warning Light Blinking Pattern In Test Mode (2 Of 3)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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) or more.
• The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
• If master cylinder pressure sensor check can not be completed, do not depress the brake pedal frequently. It may further reduce negative pressure and make the sensor check difficult to complete.
• If the negative pressure is insufficient, master cylinder pressure sensor check may not be completed. In this case, idle the engine to get enough negative pressure.
• If the brake pedal is depressed during engine stop, negative pressure may become insufficient and the BRAKE warning light may come on. (It runs the motor and performs incorrect control.)

1. Check that the ABS warning light is blinking in TEST MODE.
2. Drive vehicle straight forward.
   1. 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.

   HINT:

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

3. Stop the vehicle.

HINT:

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

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 the step 14).

1. Check that the VSC warning light is blinking in TEST MODE.
   Fig 17: Identifying VSC Warning Light Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Move the shift lever to the D position and drive the vehicle at a vehicle speed of approximately 3 mph (5 km/h), turn the steering wheel either to left or right 90° or more, and maintain 180° circular drive for the vehicle.
3. Stop the vehicle and shift the shift lever to the P position. Check that the skid control buzzer sounds for 3 sec.

   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 degree 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.
4. Read the DTC (s) by following the tester screen.

   HINT:

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

   Fig 18: Identifying Start And End Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 19: Sensor Check Diagnostic Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The codes in this table are output only in SIGNAL CHECK (TEST MODE).