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Test Mode Procedure

NOTE: VSC operation is prohibited while in test mode.

HINT:

  1. CHECK SENSOR SIGNAL BY TEST MODE (When Using Techstream) 
    1. Procedures for test mode:
      1. Turn the ignition switch off.
      2. Check that the steering wheel is in the centered position.
      3. Check that the shift lever is in P and apply the parking brake.
      4. Connect the Techstream to the DLC3.
      5. Turn the ignition switch to ON.
      6. Turn the Techstream on.
      7. Set the Techstream to test mode (select "Signal Check").

        HINT:

        Refer to the Techstream operator manual for further details.

      8. Check that the ABS warning light and slip indicator light blink as shown in the illustration.

        HINT:

        If the ABS warning light and slip indicator light do not blink, check the TS and CG terminal circuit, and the ABS and slip indicator light circuits.

        SECTION TITLE REFERENCE CHART

        Article See Procedure
        ABS Warning Light does not Come ON ABS WARNING LIGHT DOES NOT COME ON 
        Slip Indicator Light does not Come ON SLIP INDICATOR LIGHT DOES NOT COME ON 
        TS and CG Terminal Circuit TS AND CG TERMINAL CIRCUIT 
        Fig 1: ABS Warning Light And Slip Indicatot Light - Test Mode Blinking Pattern
        G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      9. Start the engine.
    2. w/ Downhill Assist Control:

      Check the lost booster pressure judgment and perform the master cylinder pressure sensor zero point calibration.

      NOTE: Perform the check in the lost booster pressure state (negative pressure in the booster is depressurized).
      1. Turn the ignition switch to ON.
      2. Check that the BRAKE warning light comes on when depressing the brake pedal with a force of 59 N (6 kgf, 13.2 lbf) or more for 1 second or more (lost booster pressure judgment).
      3. Start the engine while depressing the brake pedal with a force of 59 N (6 kgf, 13.2 lbf) or more.
      4. Check that the BRAKE warning light goes off when quickly releasing the brake pedal (normal booster pressure judgment).
      5. Leave the vehicle for 1 second or more (master cylinder pressure sensor zero point calibration).
      NOTE:
      • If you slowly depress the brake pedal or depress it again, master cylinder pressure sensor zero point calibration is not performed normally.
      • If the lost booster pressure judgment check is not completed normally, the master cylinder pressure sensor check is not judged.
      • If a recheck is performed after the engine has started, end the test mode, enter test mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.
    3. Check the deceleration sensor.
      1. Keep the vehicle stationary on a level surface for 1 second or more.

        HINT:

        The deceleration sensor check can be performed together with the following master cylinder pressure sensor check.

    4. Check the master cylinder pressure sensor.
      1. Leave the vehicle in a stationary condition and release the brake pedal 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. Check that the ABS warning light remains illuminated for 3 seconds.

        HINT:

        • Ensure that the ABS warning light comes on.
        • While the ABS warning light remains illuminated, continue depressing 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 brake pedal operation above is performed.
    5. Check the speed sensor.
      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 45 km/h (28 mph) or more for several seconds.
        Fig 2: ABS Warning Light Blinking Pattern
        G06003245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check that the ABS warning light goes off.
        NOTE:
        • The speed sensor check may not be completed if the sensor check is started with the steering wheel turned or one or more wheels spinning.
        • If the speed sensor check is commenced while the steering wheel is turned, the ABS warning light may not turn off after the middle speed sensor check is finished.
        • The ABS warning light comes on immediately when an abnormality is detected.
        • When the speed sensor signal is normal, the ABS warning light goes off while driving at 45 km/h (28 mph) or more, and blinks in the test mode pattern while the vehicle is stationary.
        • Do not drive the vehicle at a speed of 80 km/h (50 mph) or more after the ABS warning light turns off, because test mode DTCs are stored again when the vehicle speed exceeds 80 km/h (50 mph).
        Fig 3: ABS Warning Light And Speed Sensor Blinking Pattern
        G06003246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        When there is a speed sensor malfunction, or when the deceleration sensor and master cylinder pressure sensor check is incomplete, the illumination condition differs from that shown above.

      3. Stop the vehicle.
    6. Check the yaw rate sensor.
      1. Move the shift lever to P and pull the parking brake lever.
      2. Check that the slip indicator light is blinking as shown in the illustration.
      3. Keep the vehicle stationary on a level surface for 1 second or more.
        Fig 4: Slip Indicatot Light - Test Mode Blinking Pattern
        G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Move the shift lever to D and drive the vehicle at a speed of 5 km/h (3 mph) or more, and turn the steering wheel either to the left or right 90° or more for 1 second or more to turn the vehicle through 180°.
        NOTE: It is possible to change the vehicle speed, stop the vehicle and drive in reverse while turning. However, do not turn the ignition switch off or move the shift lever to P.
      5. Stop the vehicle, move the shift lever to P, and then apply the parking brake.
        Fig 5: Identifying Start And End Position
        G06003248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. 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 (See SKID CONTROL BUZZER CIRCUIT ).
      • If the skid control buzzer still does not sound, there is a malfunction in the yaw rate sensor, so check for DTCs.
      • Drive the vehicle in a 180° semi circle. At the end of the turn, the direction of the vehicle should be within 180 +/-5° of its start position.
      • Complete the vehicle turn within 20 seconds.
      • Do not spin the wheels.
    7. Check the VSC OFF switch.
      1. Check that the slip indicator light is blinking as shown in the illustration.
      2. for 2WD: Check that the AUTO LSD indicator light turns on when the VSC OFF switch is pressed briefly.
      3. for 4WD: Check that the TRAC OFF indicator light turns off when the VSC OFF switch is pressed briefly.
      4. Briefly press the VSC OFF switch again.
      Fig 6: Slip Indicatot Light - Test Mode Blinking Pattern
      G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Check the completion of sensor check.
      1. When the sensor check is successfully completed, the ABS warning light blinks in the test mode pattern when the vehicle is stopped, and goes off when the vehicle is driven.
      NOTE: If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.
    9. Read the DTCs of signal check function.
      1. Read the DTC(s) by following the instructions on the Techstream screen.
      NOTE:
      • If only the DTCs are output, repair the malfunction area and clear the DTCs.
      • If the DTCs or test mode codes (DTC of signal check function) are output, repair the malfunction area, clear the DTCs and perform the test mode procedures again.

      HINT:

      See the list of the DTCs (refer to "DTC OF TEST MODE FUNCTION (SIGNAL CHECK)" below).

  2. CHECK SENSOR SIGNAL BY TEST MODE (When not Using Techstream) 
    1. Procedures for test mode:
      1. Turn the ignition switch off.
      2. Check that the steering wheel is in the centered position.
      3. Check that the shift lever is in P and apply the parking brake.
      4. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

        SST 09843-18040 

      5. Turn the ignition switch to ON.
        Fig 7: Identifying DLC3 Connector Terminals
        G04944107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Check that the ABS warning light and slip indicator light blink as shown in the illustration.

        HINT:

        If the ABS warning light and slip indicator light do not blink, check the TS and CG terminal circuit, and the ABS and slip indicator light circuits.

        SECTION TITLE REFERENCE CHART

        Article See Procedure
        ABS Warning Light does not Come ON ABS WARNING LIGHT DOES NOT COME ON 
        Slip Indicator Light does not Come ON SLIP INDICATOR LIGHT DOES NOT COME ON 
        TS and CG Terminal Circuit TS AND CG TERMINAL CIRCUIT 
        Fig 8: ABS Warning Light And Slip Indicatot Light - Test Mode Blinking Pattern
        G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      7. Start the engine.
    2. w/ Downhill Assist Control:

      Check the lost booster pressure judgment and perform the master cylinder pressure sensor zero point calibration.

      NOTE: Perform the check in the lost booster pressure state (negative pressure in the booster is depressurized).
      1. Turn the ignition switch to ON.
      2. Check that the BRAKE warning light comes on when depressing the brake pedal with a force of 59 N (6 kgf, 13.2 lbf) or more for 1 second or more (lost booster pressure judgment).
      3. Start the engine while depressing the brake pedal with a force of 59 N (6 kgf, 13.2 lbf) or more.
      4. Check that the BRAKE warning light goes off when quickly releasing the brake pedal (normal booster pressure judgment).
      5. Leave the vehicle for 1 second or more (master cylinder pressure sensor zero point calibration).
      NOTE:
      • If you slowly depress the brake pedal or depress it again, master cylinder pressure sensor zero point calibration is not performed normally.
      • If the lost booster pressure judgment check is not completed normally, the master cylinder pressure sensor check is not judged.
      • If a recheck is performed after the engine has started, end the test mode, enter test mode again, and release the vacuum in the booster by pumping the brake pedal prior to the recheck.
    3. Check the deceleration sensor.
      1. Keep the vehicle stationary on a level surface for 1 second or more.

      HINT:

      The deceleration sensor check can be performed together with the following master cylinder pressure sensor check.

    4. Check the master cylinder pressure sensor.
      1. Leave the vehicle in a stationary condition and release the brake pedal 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. Check that the ABS warning light remains illuminated for 3 seconds.

      HINT:

      • Ensure that the ABS warning light comes on.
      • While the ABS warning light remains illuminated, continue depressing 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 brake pedal operation above is performed.
    5. Check the speed sensor.
      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 45 km/h (28 mph) or more for several seconds.
      2. Check that the ABS warning light goes off.
        Fig 9: ABS Warning Light Blinking Pattern
        G06003245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • The speed sensor check may not be completed if the sensor check is started with the steering wheel turned or one or more wheels spinning.
        • If the speed sensor check is commenced while the steering wheel is turned, the ABS warning light may not turn off after the middle speed sensor check is finished.
        • The ABS warning light comes on immediately when an abnormality is detected.
        • When the speed sensor signal is normal, the ABS warning light goes off while driving at 45 km/h (28 mph) or more, and blinks in the test mode pattern while the vehicle is stationary.
        • Do not drive the vehicle at a speed of 80 km/h (50 mph) or more after the ABS warning light turns off, because test mode DTCs are stored again when the vehicle speed exceeds 80 km/h (50 mph).
        Fig 10: ABS Warning Light And Speed Sensor Blinking Pattern
        G06003246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        When there is a speed sensor malfunction, or when the deceleration sensor and master cylinder pressure sensor check is incomplete, the illumination condition differs from that shown above.

      3. Stop the vehicle.
    6. Check the yaw rate sensor.
      1. Move the shift lever to P and pull the parking brake lever.
      2. Check that the slip indicator light is blinking as shown in the illustration.
      3. Keep the vehicle stationary on a level surface for 1 second or more.
        Fig 11: Slip Indicatot Light - Test Mode Blinking Pattern
        G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Move the shift lever to D and drive the vehicle at a speed of 5 km/h (3 mph) or more, and turn the steering wheel either to the left or right 90° or more for 1 second or more to turn the vehicle through 180°.
        NOTE: It is possible to change the vehicle speed, stop the vehicle and drive in reverse while turning. However, do not turn the ignition switch off or move the shift lever to P.
      5. Stop the vehicle, move the shift lever to P, and then apply the parking brake.
      6. Check that the skid control buzzer sounds for 3 seconds.
      Fig 12: Identifying Start And End Position
      G06003248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 (See SKID CONTROL BUZZER CIRCUIT ).
      • If the skid control buzzer still does not sound, there is a malfunction in the yaw rate sensor, so check for DTCs.
      • Drive the vehicle in a 180° semi circle. At the end of the turn, the direction of the vehicle should be within 180 +/-5° of its start position.
      • Complete the vehicle turn within 20 seconds.
      • Do not spin the wheels.
    7. Check the VSC OFF switch.
      1. Check that the slip indicator light is blinking as shown in the illustration.
      2. for 2WD: Check that the AUTO LSD indicator light turns on when the VSC OFF switch is pressed briefly.
      3. for 4WD: Check that the TRAC OFF indicator light turns off when the VSC OFF switch is pressed briefly.
      4. Briefly press the VSC OFF switch again.
      Fig 13: Slip Indicatot Light - Test Mode Blinking Pattern
      G06003240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Check the completion of sensor check.
      1. When the sensor check is successfully completed, the ABS warning light blinks in the test mode pattern when the vehicle is stopped, and goes off when the vehicle is driven.
      NOTE: If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.
    9. Read the DTCs of the signal check function.
      1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

        SST 09843-18040 

      2. Turn the ignition switch to ON.
      3. Count the number of blinks of the ABS and slip indicator lights.

        HINT:

        As an example, the blinking patters of DTCs 71 and 74 are shown below.

        Fig 14: Identifying DLC3 Connector Terminals
        G04947379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Fig 15: ABS And Slip Indicator Light Blinking Pattern - Trouble Code (Example Codes 71 And 74)
        G06003258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • If only DTCs are output, repair the malfunctioning area and clear the DTCs.
        • If the DTCs or test mode codes (DTC of signal check function) are output, repair the malfunctioning area, clear the DTCs and perform the test mode procedures again.

        HINT:

        • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
        • See the list of DTCs (refer to "DTC OF TEST MODE FUNCTION (SIGNAL CHECK)" below).
        • If all sensors are normal, a normal system code is output (the light comes on for 0.25 seconds at intervals of 0.25 seconds).
      4. After the check, disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.
      5. Turn the ignition switch off.
  3. DTC OF TEST MODE FUNCTION (SIGNAL CHECK) 

    DTC of ABS Sensor Check Function: 

    DTC OF TEST MODE FUNCTION CHART

    DTC Code Detection Item Trouble Area
    C1271/71 Low output signal of front speed sensor RH
    • Front speed sensor RH
    • Speed sensor circuit
    • Sensor installation
    C1272/72 Low output signal of front speed sensor LH
    • Front speed sensor LH
    • Speed sensor circuit
    • Sensor installation
    C1273/73 Low output signal of rear speed sensor RH
    • Rear speed sensor RH (for 4WD)
    • Rear axle hub and bearing assembly (skid control sensor) RH (for 2WD)
    • Speed sensor circuit
    • Sensor installation
    C1274/74 Low output signal of rear speed sensor LH
    • Rear speed sensor LH (4WD)
    • Rear axle hub and bearing assembly (skid control sensor) LH (2WD)
    • Speed sensor circuit
    • Sensor installation
    C1275/75 Abnormal change in output signal of front speed sensor RH
    • Sensor installation
    • Speed sensor rotor
    • Foreign matter on sensor tip or sensor rotor
    C1276/76 Abnormal change in output signal of front speed sensor LH
    • Sensor installation
    • Speed sensor rotor
    • Foreign matter on sensor tip or sensor rotor
    C1277/77 Abnormal change in output signal of rear speed sensor RH
    • Sensor installation
    • Speed sensor rotor
    • Foreign matter on sensor tip or sensor rotor
    C1278/78 Abnormal change in output signal of rear speed sensor LH
    • Sensor installation
    • Speed sensor rotor
    • Foreign matter on sensor tip or sensor rotor
    C1279/79 Deceleration sensor output voltage malfunction
    • Yaw rate sensor
    • Sensor installation
    C1281/81 Master cylinder pressure sensor output malfunction Master cylinder pressure sensor
    Booster failure detection (w/ Booster Failure Compensation) Brake pedal load sensing switch

    DTC of VSC Sensor Check Function: 

    DTC OF VSC SENSOR CHECK FUNCTION CHART

    DTC Code Detection Item Trouble Area
    C0371/71 Yaw rate sensor Yaw rate sensor
    C1379/74* Downhill assist control switch Downhill assist control switch

    HINT:

    • *: w/ Downhill Assist Control
    • The DTCs in this table are only stored in test mode.
    • The storing of DTCs from C1271/71 to C1274/74 is completed before the vehicle speed reaches 5 km/h (3 mph).
    • The storing of DTCs from C1275/75 to C1278/78 is completed before the vehicle speed reaches 45 km/h (28 mph).
    • C1271/71 to C1274/74: The speed output from only one wheel is extremely low despite other wheel speed outputs reaching 5 km/h (3 mph).
    • C1275/75 to C1278/78: The abnormal speed sensor output frequency is as shown in the illustration.
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