Test Mode Procedure

1. Release the parking brake.
   NOTE: Before releasing the parking brake, move the shift lever to P for safety.

   HINT:

   When the parking brake is applied or the brake fluid level is low, the brake warning light / red (malfunction) comes on.

2. When the power switch is turned on (IG), check that the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction), master caution indicator (VSC warning) and slip indicator lights come on for approximately 3 seconds.

HINT:

• If the skid control ECU stores any DTCs, the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction), master caution indicator (VSC warning) and slip indicator lights will come on.
• The master caution indicator light will come on and a warning message will be displayed on the multi-information display if the EBD system, BA system, or TRAC system is malfunctioning or if the ABS, VSC, electronically controlled brake system control cannot be performed.
• If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

Fig 1: Identifying ABS Warning And Brake Warning Indicator Lights

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the power switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs recorded during the sensor check will be erased.
• During Test Mode (signal check), the skid control ECU records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are erased if a normal condition is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure to enter the Test Mode
   1. Turn the power switch off.
   2. Check that the steering wheel is in the straight-ahead position.
   3. Check that the shift lever is in P.
   4. Connect the Techstream to the DLC3.
   5. Turn the power switch on (IG).
   6. Turn the Techstream on.
   7. Switch the skid control ECU to Test Mode using the Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.
   8. Check that the ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights come on for several seconds and then blink in Test Mode.

      HINT:

      If the ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights do not blink, inspect the TS and CG terminal circuit and ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) light circuits.

      Fig 2: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   9. Check the ABS sensors.

      HINT:

      Check that the ABS warning light is blinking in the Test Mode blinking pattern before performing the ABS sensor check.

2. Acceleration Sensor Check
   1. Keep the vehicle stationary on a level surface for 1 second or more.
      Fig 3: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The acceleration sensor check can be performed with the master cylinder pressure sensor check below.

3. Master Cylinder Pressure Sensor Check
   1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force greater than 98 N (10 kgf, 22 lbf) for 1 second.
   2. Check that the ABS warning light stays on for 3 seconds.

      HINT:

      • Confirm that the ABS warning light comes on.
      • 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 preceding brake pedal operation is performed.
4. Speed Sensor Check
   1. Drive the vehicle straight-ahead. Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.

      HINT:

      • The sensor check may not be completed if wheelspin occurs.
      • The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
      • The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.
   2. Stop the vehicle.
      NOTE:

      • Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.
      • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
      • After the ABS warning light goes off, if vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
      • If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

      HINT:

      When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

   3. Check the VSC sensor.

      HINT:

      Check that the brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights are blinking in the Test Mode blinking pattern before performing the VSC sensor check.

      Fig 4: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Yaw Rate Sensor Check
   1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
   2. Move the shift lever from P to D and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
      Fig 5: Identifying Vehicle Start And End Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. 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 sensor 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 sensor check again.
      • If the skid control buzzer still does not sound, the yaw rate sensor may be malfunctioning. Check for DTCs.
      • Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
      • Do not allow the wheels to spin.
      • Do not turn the power switch off while turning.
      • Do not move the shift lever to P while turning, but changing the vehicle speed, stopping, or driving in reverse is acceptable.
      • Complete the turn within 20 seconds.
6. End of Sensor Check
   1. If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle is stopped and goes off while the vehicle is driving.
   NOTE:

   • When all the yaw rate sensor, acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the sensor check is completed.
   • If the sensor check is not completed, the ABS warning light will blink even while the vehicle is driving and the ABS will not operate.
   Fig 6: Brake Warning Light - Blinking Pattern
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Read Sensor Check DTCs
   1. Read the DTC(s) by following the Techstream screen.
      NOTE:

      • If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunction and clear the DTCs.
      • If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunction, clear the DTCs, and perform the Test Mode inspection again.

      HINT:

      See  h"Sensor Check DTCs".

   2. Turn the power switch off and disconnect the Techstream.
8. Sensor Check DTCs

ABS Sensor: 

VSC Sensor: 

Electronically Controlled Brake System Sensor: 

HINT:

The codes in this table are output only in Test Mode (signal check).

HINT:

• If the power switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs recorded during the sensor check will be erased.
• During Test Mode (signal check), the skid control ECU records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are erased if a normal condition is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure to enter Test Mode
   1. Turn the power switch off.
   2. Check that the steering wheel is in the straight-ahead position.
   3. Check that the shift lever is in P.
   4. Using SST, connect terminals TS and CG of the DLC3.

      SST 09843-18040 

      Fig 7: Identifying DLC3 Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Turn the power switch on (IG).
   6. Check that the ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights come on for several seconds and then blink in Test Mode.

      HINT:

      If the ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights do not blink, inspect the TS and CG terminal circuit and ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) light circuits.

      Fig 8: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Check the ABS sensors.

      HINT:

      Check that the ABS warning light is blinking in the Test Mode blinking pattern before performing the ABS sensor check.

2. Acceleration Sensor Check
   Fig 9: Brake Warning Light - Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Keep the vehicle stationary on a level surface for 1 second or more.

      HINT:

      The acceleration sensor check can be performed with the master cylinder pressure sensor check below.

3. Master Cylinder Pressure Sensor Check
   1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force greater than 98 N (10 kgf, 22 lbf) for 1 second.
   2. Check that the ABS warning light stays on for 3 seconds.

      HINT:

      • Confirm that the ABS warning light comes on.
      • 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 preceding brake pedal operation is performed.
4. Speed Sensor Check
   1. Drive the vehicle straight-ahead. Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.

      HINT:

      • The sensor check may not be completed if wheelspin occurs.
      • The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
      • The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.
   2. Stop the vehicle.
      NOTE:

      • Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.
      • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
      • After the ABS warning light goes off, if vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
      • If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

      HINT:

      When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

   3. Check the VSC sensor.

      HINT:

      Check that the brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights are blinking in the Test Mode blinking pattern before performing the VSC sensor check.

      Fig 10: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Yaw Rate Sensor Check
   1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
   2. Move the shift lever from P to D and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
      Fig 11: Identifying Vehicle Start And End Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. 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 sensor 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 sensor check again.
      • If the skid control buzzer still does not sound, the yaw rate sensor may be malfunctioning. Check for DTCs.
      • Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
      • Do not allow the wheels to spin.
      • Do not turn the power switch off while turning.
      • Do not move the shift lever to P while turning, but changing the vehicle speed, stopping, or driving in reverse is acceptable.
      • Complete the turn within 20 seconds.
6. End of Sensor Check
   1. If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle is stopped and goes off while the vehicle is driving.
      Fig 12: Brake Warning Light - Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      • When the yaw rate sensor, acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the sensor check is completed.
      • If the sensor check is not completed, the ABS warning light will blink even while the vehicle is driving and the ABS will not operate.
7. Read Sensor Check DTCs
   1. Using SST, connect terminals TC and CG of the DLC3.

      SST 09843-18040 

      Fig 13: Identifying DLC3 Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Count the number of blinks of the ABS warning, brake warning / yellow (minor malfunction) and master caution indicator (VSC warning) lights.
      Fig 14: Normal System Code And Trouble Codes - Blinking Patterns

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      • If only DTCs other than the Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.
      • If Test Mode sensor check DTCs and other DTCs are displayed or if only the Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform the Test Mode inspection again.

      HINT:

      • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
      • See  h"Sensor Check DTCs".
   3. After performing the check, disconnect SST from terminals TS and CG, and TC and CG of the DLC3 and turn the power switch off.
   4. Turn the power switch on (IG).

      HINT:

      • If the power switch is not turned on (IG) after SST is removed from the DLC3, the previous Test Mode will continue.
      • If the power switch is turned on (IG) with terminals TS and CG connected, the previous Test Mode will continue.
8. Sensor Check DTCs

   ABS Sensor: 

   ABS SENSOR REFERENCE
   
   

   DTC Code	Detection Item	Trouble Area
   71	Low Output Signal of Front Speed Sensor RH	Front speed sensor RH Sensor installation Speed sensor rotor
   72	Low Output Signal of Front Speed Sensor LH	Front speed sensor LH Sensor installation Speed sensor rotor
   73	Low Output Signal of Rear Speed Sensor RH	Rear speed sensor RH Sensor installation Speed sensor rotor
   74	Low Output Signal of Rear Speed Sensor LH	Rear speed sensor LH Sensor installation Speed sensor rotor
   75	Abnormal Change in Output Signal of Front Speed Sensor RH	Speed sensor rotor
   76	Abnormal Change in Output Signal of Front Speed Sensor LH	Speed sensor rotor
   77	Abnormal Change in Output Signal of Rear Speed Sensor RH	Speed sensor rotor
   78	Abnormal Change in Output Signal of Rear Speed Sensor LH	Speed sensor rotor
   79	Acceleration Sensor Output Voltage Malfunction	Sensor installation Yaw rate and acceleration sensor
   81	Master Cylinder Pressure Sensor Output Malfunction	Stop light switch Master cylinder pressure sensor

   VSC Sensor: 

   VSC SENSOR REFERENCE
   
   

   DTC Code	Detection Item	Trouble Area
   71	Yaw Rate Sensor	Yaw rate and acceleration sensor

   Electronically Controlled Brake System Sensor: 

   ELECTRONICALLY CONTROLLED BRAKE SYSTEM SENSOR REFERENCE
   
   

   DTC Code	Detection Item	Trouble Area
   71	Stroke Sensor Zero Point Learning Malfunction	Brake pedal stroke sensor

   HINT:

   The codes in this table are output only in Test Mode (signal check).