Test Mode Procedure

HINT: 

• After replacing the master cylinder solenoid and/or the yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration and store the system information. Refer to CALIBRATION .
• 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 cleared.
• During test mode (signal check), the skid control ECU stores all DTCs of test mode (signal check function). By performing the signal check in test mode, the codes are cleared if normality is confirmed. The codes left over indicate areas where an abnormality was found.

1. Turn the engine switch off.
2. Check that the steering wheel is centered and move the shift lever to P.
3. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
   • SST: 09843-18040 
   Fig 1: Identifying TS And CG Terminals Of DLC3 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the engine switch on (IG).
5. Check that the slip indicator light and ABS warning light blinks in in the test mode pattern.
   Fig 2: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   • If the G sensor zero point calibration data is cleared, the ABS warning light comes on.
   • If the G sensor zero point calibration data is not cleared and the ABS warning light does not blink, inspect the 12 (TS) and 4 (CG) terminal circuit and the ABS warning light circuit.

     Trouble Area	See Procedure
     TS and CG terminal circuit	Refer to TS and CG Terminal Circuit
     ABS warning light circuit	Refer to ABS Warning Light Remains ON or refer to ABS Warning Light does not Come ON
     Slip indicator light circuit	Refer to Slip Indicator Light Remains ON or refer to Slip Indicator Light does not Come ON

6. Start the engine.
7. Using a check wire, perform the ABS sensor (G sensor, stop light switch, master cylinder pressure sensor, center differential lock detection switch and speed sensor) and VSC sensor (yaw rate sensor and CRAWL switch) signal checks in test mode (ABS sensor: See procedures "A" to "F", VSC sensor: See procedures "G" to "J").

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 3: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Keep the vehicle stationary on a level surface for 2 seconds or more.

1. Park the vehicle and move the shift lever to P.
2. After releasing the brake pedal for 1 second or more, depress the brake pedal with a force of 50 N (5 kgf, 11.2 lbf) or more and check that the skid control buzzer sounds for 3 seconds.
   WARNING:

   Be careful as the brake pedal cannot be depressed as far as it can under normal operation.

   HINT: 

   The master cylinder pressure sensor signal check in the next step may finish at the same time as this check.

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 4: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and then quickly depress the brake pedal with a force of 98 N (10 kgf, 22.0 lbf) or more for 1 second or more.

   HINT: 

   • At this time, the ABS warning light stays on for 3 seconds.
   • 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 the test mode pattern.
   Fig 5: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the center differential lock switch.
   1. Press the center differential lock switch to lock the center differential.
   2. Press the center differential lock switch to unlock the center differential.

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 6: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at a vehicle speed of 3 km/h (2 mph) or more.

      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 45 km/h (28 mph) or more.

3. Check the forward signal.
   Fig 7: ABS Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Drive the vehicle straight forward.

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

      NOTE:

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

4. Stop the vehicle.
   NOTE:

   • 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.
   • 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 13 (TC) and 4 (CG) of the DLC3.
   Fig 8: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • SST: 09843-18040 
2. Read the number of blinks of the ABS warning light.

   HINT: 

   • See the list of DTCs (See procedure "I").
   • If every sensor is normal, the normal system code is output (a cycle of 0.25 seconds on and 0.25 seconds off is repeated).
   • If more than 1 malfunction is detected at the same time, the lowest numbered code will be output first.
   Fig 9: ABS Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. After the check, disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.

1. Check that the slip indicator light is blinking in the test mode pattern.
   Fig 10: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the CRAWL switch.
   Fig 11: Identifying Crawl Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Turn the ON/OFF switch on.
   2. Turn the ON/OFF switch off.
   3. Turn the speed selector switch to low.
   4. Turn the speed selector switch to middle.
   5. Turn the speed selector switch to high.
   6. Turn the speed selector switch to low.

1. Check that the slip indicator light is blinking in the test mode pattern.
   Fig 12: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the zero point voltage of the yaw rate sensor.
   1. Keep the vehicle stationary 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.
   1. Move the shift lever to D and drive the vehicle at a vehicle speed of 5 km/h (3 mph) or more, and then turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
      Fig 13: Identifying Start And End Position Of Vehicle

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Stop the vehicle and move the shift lever to P. Check that the skid control buzzer sounds for 3 seconds.

      HINT: 

      • If the skid control buzzer sounds, the signal check has been completed normally.
      • If the skid control buzzer does not sound, check the skid control buzzer circuit. Refer to Skid Control Buzzer Circuit , and 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 DTCs.
      • Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 175 to 185° of its starting position.
      • Do not spin the wheels.

1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
   Fig 14: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • SST: 09843-18040 
2. Count the number of blinks of the slip indicator light.

   HINT: 

   • See the list of DTCs (See procedure "I").
   • If every sensor is normal, the normal system code is output (a cycle of 0.25 seconds on and 0.25 seconds off is repeated).
   • If more than 1 malfunction is detected at the same time, the lowest numbered code will be output first.
3. After performing the check, turn the engine switch off and disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.
4. Turn the engine switch on (IG).

HINT: 

The codes in these tables are stored only in test mode (signal check).

HINT: 

• After replacing the master cylinder solenoid and/or the yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration and store the system information. Refer to CALIBRATION .
• 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 cleared.
• During test mode (signal check), the skid control ECU stores all DTCs of test mode (signal check function). By performing the signal check in test mode, the codes are cleared if normality is confirmed. The codes left over indicate areas where an abnormality was found.

1. Turn the engine switch off.
2. Check that the steering wheel is centered and move the shift lever to P.
3. Connect the Techstream to the DLC3.
4. Turn the engine switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.
7. Check that the slip indicator light and ABS warning light blinks the test mode pattern.
   Fig 15: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   • If the G sensor zero point calibration data is cleared, the ABS warning light comes on.
   • If the G sensor zero point calibration data is not cleared and the ABS warning light does not blink, inspect the 12 (TS) and 4 (CG) terminal circuit and the ABS warning light circuit.

     Trouble Area	See Procedure
     TS and CG terminal circuit	Refer to TS and CG Terminal Circuit
     ABS warning light circuit	Refer to ABS Warning Light Remains ON or refer to ABS Warning Light does not Come ON
     Slip indicator light circuit	Refer to Slip Indicator Light Remains ON or refer to Slip Indicator Light does not Come ON

8. Start the engine.
9. Using the Techstream, perform the ABS sensor (G sensor, stop light switch, master cylinder pressure sensor, center differential lock detection switch and speed sensor) and VSC sensor (yaw rate sensor and CRAWL switch) signal checks in test mode (ABS sensor: See procedures "K" to "P", VSC sensor: See procedures "Q" to "S").

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 16: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Keep the vehicle stationary on a level surface for 2 seconds or more.

1. Park the vehicle and move the shift lever to P.
2. After releasing the brake pedal for 1 second or more, depress the brake pedal with a force of 50 N (5 kgf, 11.2 lbf) or more and check that the skid control buzzer sounds for 3 seconds.
   WARNING:

   Be careful as the brake pedal cannot be depressed as far as it can under normal operation.

   HINT: 

   The master cylinder pressure sensor signal check in the next step may finish at the same time as this check.

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 17: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and then 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.
   • 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 the test mode pattern.
   Fig 18: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the center differential lock switch.
   1. Press the center differential lock switch to lock the center differential.
   2. Press the center differential lock switch to unlock the center differential.

1. Check that the ABS warning light is blinking in the test mode pattern.
   Fig 19: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at a vehicle speed of 3 km/h (2 mph) or more.

      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 45 km/h (28 mph) or more.

3. Check the forward signal.
   Fig 20: ABS Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Drive the vehicle straight forward. Drive the vehicle at a speed of 45 km/h (28 mph) or more and check that the ABS warning light goes off.
      NOTE:

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

4. Stop the vehicle.
   NOTE:

   • 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.
   • 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 DTCs by following the Techstream screen.

   HINT: 

   • Refer to the Techstream operator's manual for further details.
   • See the list of DTCs (See procedure "T").

1. Check that the slip indicator light is blinking in the test mode pattern.
   Fig 21: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the CRAWL switch.
   Fig 22: Identifying Crawl Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Turn the ON/OFF switch on.
   2. Turn the ON/OFF switch off.
   3. Turn the speed selector switch to low.
   4. Turn the speed selector switch to middle.
   5. Turn the speed selector switch to high.
   6. Turn the speed selector switch to low.

1. Check that the slip indicator light is blinking in the test mode pattern.
   Fig 23: Identifying Blinking Pattern In Test Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the zero point voltage of the yaw rate sensor.
   1. Keep the vehicle stationary 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.
   1. Move the shift lever to D and drive the vehicle at a vehicle speed of 5 km/h (3 mph) or more, and then turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
      Fig 24: Identifying Start And End Position Of Vehicle

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Stop the vehicle and move the shift lever to P. Check that the skid control buzzer sounds for 3 seconds.

      HINT: 

      • If the skid control buzzer sounds, the signal check has been completed normally.
      • If the skid control buzzer does not sound, check the skid control buzzer circuit. Refer to Skid Control Buzzer Circuit , and 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 DTCs.
      • Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 175° to 185° of its starting position.
      • Do not spin the wheels.

1. Read the DTCs by following the Techstream screen.

   HINT: 

   • Refer to the Techstream operator's manual for further details.
   • See the list of DTCs (See procedure "R").

HINT: 

The codes in these tables are stored only in test mode (signal check).