Test Mode Procedure

HINT:

• If the ignition switch is turned from the ON to the ACC or LOCK position during test mode, DTCs related to the signal check function will be erased.
• During test mode, the skid control ECU records all DTCs related to 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 to OFF.
2. Check that the steering wheel is in the straight-ahead position.
3. A/T: Check that the shift lever is in the P position and apply the parking brake.

   M/T: Check that the shift lever is in neutral and apply the parking brake.

4. Connect Techstream to the DLC3.
5. Turn the ignition switch to the ON position.
6. Switch the ECU to test mode using Techstream. Select the following menu items: Chassis/ABS/VSC/TRAC/Utility/Signal Check.
7. Check that the ABS and VSC OFF indicator lights blink as shown in the illustration.

   HINT:

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

   Fig 1: ABS Warning Light - Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TROUBLESHOOTING CHART
   
   

   Trouble area	See Reference
   ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  ABS WARNING LIGHT DOES NOT COME ON
   VSC OFF indicator light circuit	VSC OFF INDICATOR LIGHT REMAINS ON  VSC OFF INDICATOR LIGHT DOES NOT COME ON
   TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT

8. Start the engine.
9. Activate the ABS sensor (deceleration sensor, master cylinder pressure sensor, 4WD detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate and deceleration sensor) in test mode (Signal Check) using Techstream.

HINT:

• After replacing the yaw rate and deceleration sensor, be sure to clear the zero point calibration data in the skid control ECU and perform zero point calibration.
• If the ignition switch is turned from the ON to the ACC or LOCK position during test mode, DTCs relating to the signal check function will be erased.
• During test mode, the skid control ECU records all DTCs relating to the signal check function. By performing the signal check, the codes are erased if normality is confirmed. The remaining codes are those indicating where an abnormality was found.

1. Turn the ignition switch to OFF.
2. Check that the steering wheel is in the straight-ahead position.
3. A/T: Check that the shift lever is in the P position and apply the parking brake.

   M/T: Check that the shift lever is in neutral and apply the parking brake.

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

   SST 09843-18040 

5. Turn the ignition switch to the ON position.
   Fig 2: Identifying DLC3 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Check that the ABS and VSC OFF indicator lights blink as shown in the illustration.

   HINT:

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

   Fig 3: ABS Warning Light - Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TROUBLESHOOTING CHART
   
   

   Trouble area	See Reference
   ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  ABS WARNING LIGHT DOES NOT COME ON
   VSC OFF indicator light circuit	VSC OFF INDICATOR LIGHT REMAINS ON  VSC OFF INDICATOR LIGHT DOES NOT COME ON
   TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT

7. Start the engine.
8. Activate the ABS sensor (deceleration sensor, master cylinder pressure sensor, 4WD detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate and deceleration sensor) in test mode (SIGNAL CHECK) using a check wire.

1. Check that the ABS warning light is blinking as shown in the illustration.
2. Keep the vehicle stationary on a level surface for 1 second or more.
   Fig 4: ABS Warning Light - Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking as shown in the illustration.
2. Keep the vehicle stationary and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf) or more for 1 second or more.
   • Keep the vehicle stationary and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf) or more for 1 second or more.
   • 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 above brake pedal operation is performed.
     Fig 5: ABS Warning Light - Blinking Pattern In Test Mode

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking as shown in the illustration.
2. Check the transfer indicator switch (4WD position).
   1. Push the 4 wheel drive control switch on to put the vehicle in 4WD mode.
   2. Push the 4 wheel drive control switch off to put the vehicle in 2WD mode.
      Fig 6: ABS Warning Light - Blinking Pattern In Test Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking as shown in the illustration.
2. Check the transfer indicator switch (L4 position).
   1. Turn the 4 wheel drive control switch to the L position to put the vehicle in L4 mode.
   2. Turn the 4 wheel drive control switch to the H position to put the vehicle in H4 mode.

      HINT:

      Move the vehicle either a little forward or a little backward to engage the L4 position.

      Fig 7: ABS Warning Light - Blinking Pattern In Test Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking as shown in the illustration.
2. Check the speed sensor signal
   1. Drive the vehicle straight forward at a speed of 90 km/h (56 mph) or more.
   2. Drive the vehicle straight rearward at a speed of 3 km/h (1.9 mph) or more for 1 second or more.
   3. Check that the ABS warning light goes off.

      HINT:

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

   4. Stop the vehicle.
      Fig 8: ABS Warning Light - Blinking Pattern In Test Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      • Before performing the speed sensor signal check, complete the deceleration sensor, master cylinder pressure sensor, 4WD 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 45 km/h (28 mph), a signal check code will be stored again. Decelerate or stop the vehicle before the speed reaches 45 km/h (28 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 signal check has been completed, the ABS warning light goes off while driving and blinks in test mode while stationary.

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

   HINT:

   Refer to Techstream operator's manual for further details.

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

   SST 09843-18040 

2. Turn the ignition switch to the ON position.
3. Read the number of blinks of the ABS warning light.
   • If every sensor is normal, the normal code is displayed (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated).
   • If 2 or more malfunctions are detected at the same time, the lowest numbered DTC is displayed first.
     Fig 9: ABS Warning Light - Blinking Pattern

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     Fig 10: DTC - Blinking Pattern

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. After the check, disconnect the SST from terminals TC and CG of the DLC3.
5. Turn the ignition switch to OFF.

1. Check that the VSC OFF indicator light is blinking as shown in the illustration.
2. Keep the vehicle stationary on a level surface for 1 second or more.
   Fig 11: ABS Warning Light - Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Shift the shift lever to the D position (A/T) and drive the vehicle at a speed of approximately 5 km/h (3 mph), turn the steering wheel either to the left or right 90° or more, and turn the vehicle through 180°.
4. A/T: Stop the vehicle, check that the shift lever is in the P position, and then apply the parking brake. M/T: Stop the vehicle, check that the shift lever is in neutral, and then apply the parking brake.
5. Check that the skid control (VSC warning) buzzer sounds for 3 seconds.

   HINT:

   • If the skid control (VSC warning) buzzer sounds, the signal check has been completed normally.
   • If the skid control (VSC warning) 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 (VSC warning) buzzer still doesn't sound, there is a malfunction in the yaw rate sensor, so check the DTC.
   • Drive the vehicle in a 180° semi circle. At the end of the turn, the direction of the vehicle should be within 175 to 185° of its start position.
   • The vehicle turn should be completed within 20 seconds.
   • Do not spin the wheels.
     Fig 12: Identifying Start Position & End Position

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the VSC OFF indicator light is blinking as shown in the illustration.
2. Check the downhill assist control switch.
   1. Push the downhill assist control switch on.
   2. Push the downhill assist control switch off.

1. Read the DTC (s) by following the tester screen.
   • Refer to Techstream operator's manual for further details.
     Fig 13: ABS Warning Light - Blinking Pattern In Test Mode

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   SST 09843-18040 

2. Turn the ignition switch to the ON position.
3. Read the number of blinks of the VSC OFF indicator light.
   • If every sensor is normal, the normal code is displayed (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated).
     Fig 14: ABS Warning Light - Blinking Pattern

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • If 2 or more malfunctions are detected at the same time, the lowest numbered DTC is displayed first.
     Fig 15: DTC - Blinking Pattern

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. After the check, disconnect the SST from terminals TC and CG of the DLC3.
5. Turn the ignition switch to OFF.

ABS sensor 

VSC sensor 

HINT:

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