Test Mode Procedure

HINT:

• After replacing the master cylinder solenoid and/or yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration (See 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 the test mode (signal check) function. By performing the test mode (signal check), the codes are cleared if normality is confirmed. The codes left over are the codes 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 

4. Turn the engine switch on (IG).
   Fig 1: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Check that "VSC TEST MODE" is displayed on the multi-information display and check that the ABS warning light blinks in test mode.
   Fig 2: Identifying ABS Warning Light Blinking Pattern (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 REFERENCE
   
   

   Trouble Area	See Procedure
   TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
   ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  or ABS WARNING 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 procedure  2"A" to  7"F", VSC sensor: See  8procedure "G" to  11"J").

1. Check that the ABS warning light is blinking in test mode.
2. Keep the vehicle stationary on a level surface for 2 seconds or more.

Fig 3: Identifying ABS Warning Light Blinking Pattern (Test Mode)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

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 test mode.
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.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 test mode.
2. Check the center differential lock switch.
   1. Push the center differential lock switch on to lock the center differential.
   2. Push the center differential lock switch off to unlock the center differential.
   Fig 5: Identifying ABS Warning Light Blinking Pattern (Test Mode)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. Check the reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more.
   Fig 6: Identifying ABS Warning Light Blinking Pattern (Test Mode)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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: Identifying 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.

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.

   SST 09843-18040 

2. Read the number of blinks of the ABS warning light.
   Fig 8: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • See the list of DTCs (See  10procedure "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: Identifying 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 "VSC TEST MODE" is displayed on the multi-information display.
2. Check the CRAWL switch.
   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.

Fig 10: Identifying ON/OFF Switch And Speed Selector Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that "VSC TEST MODE" is displayed on the multi-information display.
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.
   2. Stop the vehicle and move the shift lever to P. Check that the skid control buzzer sounds for 3 seconds.

Fig 11: Identifying Start And End Position Of Vehicle

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the skid control buzzer sounds, the signal check has 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.
• Drive the vehicle in a 180° circle. At the end of the turn, the direction of the vehicle should be within 175 to 185° of its start position.
• Do not spin the wheels.

1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

   SST 09843-18040 

2. Read the codes output on the multi-information display.

   HINT:

   Fig 12: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • See the list of DTCs (See  10procedure "I").
   • If every sensor/switch is normal, "DIAG VSC OK" is displayed on the multi-information display.
   • 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).

ABS Sensor 

VSC Sensor 

HINT:

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

HINT:

• After replacing the master cylinder solenoid and/or yaw rate and G sensor or performing a vehicle height adjustment, make sure to perform yaw rate and G sensor zero point calibration (See 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 the test mode (signal check) function. By performing the test mode (signal check), the codes are cleared if normality is confirmed. The codes left over are the codes 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 "VSC TEST MODE" is displayed on the multi-information display and check that the ABS warning light blinks in test mode.
     Fig 13: Identifying ABS Warning Light Blinking Pattern (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 REFERENCE
     
     

     Trouble Area	See Procedure
     TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
     ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  or ABS WARNING 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  13 procedure "K" to  18"P", VSC sensor: See  19 procedure "Q" to  21"S").

1. Check that the ABS warning light is blinking in test mode.
2. Keep the vehicle stationary on a level surface for 2 seconds or more.

Fig 14: Identifying ABS Warning Light Blinking Pattern (Test Mode)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

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 test mode.
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.

Fig 15: Identifying ABS Warning Light Blinking Pattern (Test Mode)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 test mode.
2. Check the center differential lock switch.
   1. Push the center differential lock switch on to lock the center differential.
   2. Push the center differential lock switch off to unlock the center differential.

Fig 16: Identifying ABS Warning Light Blinking Pattern (Test Mode)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the ABS warning light is blinking in test mode.
2. Check the reverse signal.
   1. Drive the vehicle in reverse for more than 1 second at 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.

   Fig 17: Identifying ABS Warning Light Blinking Pattern (Test Mode)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the forward signal.
   Fig 18: Identifying 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 DTC(s) by following the Techstream screen.

   HINT:

   • Refer to the Techstream operator's manual for further details.
   • See the list of DTCs (See  22procedure "T").

1. Check that "VSC TEST MODE" is displayed on the multi-information display.
2. Check the CRAWL switch.
   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.

Fig 19: Identifying ON/OFF Switch And Speed Selector Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that "VSC TEST MODE" is displayed on the multi-information display.
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.
   2. Stop the vehicle and move the shift lever to P. Check that the skid control buzzer sounds for 3 seconds.

Fig 20: Identifying Start And End Position Of Vehicle

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the skid control buzzer sounds, the signal check has 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.
• Drive the vehicle in a 180° circle. At the end of the turn, the direction of the vehicle should be within 175° to 185° of its start position.
• Do not spin the wheels.

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

   HINT:

   • Refer to the Techstream operator's manual for further details.
   • See the list of DTCs (See  20procedure "R").

ABS Sensor 

VSC Sensor 

HINT:

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