ELECTRONICALLY CONTROLLED BRAKE SYSTEM > TEST MODE PROCEDURE

for Preparation Click here



WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK
  1. Release the parking brake.

    NOTICE:
    When releasing the parking brake, push the P position switch 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. C209495E01
  3. When the power switch is turned on (IG), check that the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights come on until the power switch is turned on (READY).

    HINT:
    1. If the skid control ECU stores any DTCs, the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights will come on.
    2. If any of the indicators come on or does not come on, proceed to troubleshooting for the light circuits listed below.

    Trouble Area
    See Procedure
    ABS warning light circuit (Remains on)
    Click here
    ABS warning light circuit (Does not come on)
    Click here
    Brake warning light / red (malfunction) circuit (Remains on)
    Click here
    Brake warning light / red (malfunction) circuit (Does not come on)
    Click here
    Brake warning light / yellow (minor malfunction) circuit (Remains on)
    Click here
    Brake warning light / yellow (minor malfunction) circuit (Does not come on)
    Click here
    Slip indicator light circuit (Remains on)
    Click here
    Slip indicator light circuit (Does not come on)
    Click here


SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using the Intelligent Tester)

NOTICE:
Before performing the master cylinder pressure sensor check or yaw rate sensor zero point voltage check, perform linear valve offset learning.

HINT:
  1. 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 cleared.
  2. 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 cleared 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 centered.

    3. Check that the parking brake is released.

    4. Check that park (P) is selected.

    5. Connect the intelligent tester to the DLC3.

    6. Turn the power switch on (IG).

    7. Turn the intelligent tester on.

    8. Switch the skid control ECU to Test Mode using the intelligent tester. Enter the following menus: Chassis / ABS/VSC/TRC / Signal Check.



    9. BR03904E84
    10. Check that the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights come on for several seconds and then blink in Test Mode.

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

    11. 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.

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

  3. Master Cylinder Pressure Sensor Check

    NOTICE:
    Before performing the master cylinder pressure sensor check, perform linear valve offset learning.


    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, 22.0 lbf) for 1 second.

    2. Check that the ABS warning light stays on for 3 seconds.

      HINT:
      1. Confirm that the ABS warning light comes on.
      2. 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.
      3. The ABS warning light comes on for 3 seconds every time the preceding brake pedal operation is performed.

  4. Speed Sensor Check

    NOTICE:
    Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.


    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:
      1. The sensor check may not be completed if wheelspin occurs.
      2. The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.

    2. Stop the vehicle.

      NOTICE:
      1. The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
      2. 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).
      3. If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

    3. Check the VSC sensor.

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

  5. Yaw Rate Sensor Zero Point Voltage Check

    NOTICE:
    Before performing the yaw rate sensor zero point voltage check, perform linear valve offset learning.


    1. Check that park (P) is selected.

    2. Keep the vehicle stationary on a level surface for 1 second or more.

    3. Check that the brake warning / yellow (minor malfunction) light blinks.



  6. Yaw Rate Sensor Output Check



      C137757E03
    1. 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.

      NOTICE:
      1. Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
      2. Do not allow the wheels to spin.
      3. Do not turn the power switch off while turning.
      4. Do not push the P position switch while turning, but changing the vehicle speed, stopping, or driving in reverse is acceptable.

    2. Stop the vehicle and push the P position switch. Check that the skid control buzzer sounds for 3 seconds.

      HINT:
      1. If the skid control buzzer sounds, the sensor check has completed normally.
      2. If the skid control buzzer does not sound, check the skid control buzzer circuit (Click here), then perform the sensor check again.
      3. If the skid control buzzer still does not sound, the yaw rate sensor may be malfunctioning. Check for DTCs.



  7. End of Sensor Check



      BR03904E84
    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.

      NOTICE:
      1. When all the yaw rate sensor, acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the sensor check is completed.
      2. If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

  8. Read Sensor Check DTCs

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

      NOTICE:
      1. If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunction and clear the DTCs.
      2. 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 "Sensor Check DTCs".

    2. Turn the power switch off and disconnect the intelligent tester.

  9. Sensor Check DTCs

    ABS Sensor 
    DTC Code
    Detection Item
    Trouble Area
    C1271
    Low Output Signal of Front Speed Sensor RH
    1. Front speed sensor RH
    2. Sensor installation
    3. Speed sensor rotor
    C1272
    Low Output Signal of Front Speed Sensor LH
    1. Front speed sensor LH
    2. Sensor installation
    3. Speed sensor rotor
    C1273
    Low Output Signal of Rear Speed Sensor RH
    1. Rear speed sensor RH
    2. Sensor installation
    3. Speed sensor rotor
    C1274
    Low Output Signal of Rear Speed Sensor LH
    1. Rear speed sensor LH
    2. Sensor installation
    3. Speed sensor rotor
    C1275
    Abnormal Change in Output Signal of Front Speed Sensor RH
    1. Front speed sensor RH
    2. Speed sensor rotor
    C1276
    Abnormal Change in Output Signal of Front Speed Sensor LH
    1. Front speed sensor LH
    2. Speed sensor rotor
    C1277
    Abnormal Change in Output Signal of Rear Speed Sensor RH
    1. Rear speed sensor RH
    2. Speed sensor rotor
    C1278
    Abnormal Change in Output Signal of Rear Speed Sensor LH
    1. Rear speed sensor LH
    2. Speed sensor rotor
    C1279
    Acceleration Sensor Output Voltage Malfunction
    1. Sensor installation
    2. Yaw rate and acceleration sensor
    C1281
    Master Cylinder Pressure Sensor Output Malfunction
    1. Stop light switch
    2. Regulator pressure sensor

    VSC Sensor 
    DTC Code
    Detection Item
    Trouble Area
    C0371
    Yaw Rate Sensor
    1. Sensor installation
    2. Yaw rate and acceleration sensor

    Electronically Controlled Brake System Sensor 
    DTC Code
    Detection Item
    Trouble Area
    C1346
    Stroke Sensor Zero Point Learning Malfunction
    1. Brake pedal stroke sensor
    2. Brake pedal stroke sensor circuit

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


SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When not Using the Intelligent Tester)

NOTICE:
Before performing the master cylinder pressure sensor check or yaw rate sensor zero point voltage check, perform linear valve offset learning.

HINT:
  1. 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 cleared.
  2. 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 cleared 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 centered.

    3. Check that the parking brake is released.

    4. Check that park (P) is selected.



    5. C166029E13
    6. Using SST, connect terminals TS and CG of the DLC3.

      SST
      09843-18040  
      Text in Illustration 
      *1
      Front view of DLC3

    7. Turn the power switch on (IG).



    8. BR03904E84
    9. Check that the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights come on for several seconds and then blink in Test Mode.

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

    10. 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.

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

  3. Master Cylinder Pressure Sensor Check

    NOTICE:
    Before performing the master cylinder pressure sensor check, perform linear valve offset learning.


    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, 22.0 lbf) for 1 second.

    2. Check that the ABS warning light stays on for 3 seconds.

      HINT:
      1. Confirm that the ABS warning light comes on.
      2. 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.
      3. The ABS warning light comes on for 3 seconds every time the preceding brake pedal operation is performed.

  4. Speed Sensor Check

    NOTICE:
    Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.


    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:
      1. The sensor check may not be completed if wheelspin occurs.
      2. The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.

    2. Stop the vehicle.

      NOTICE:
      1. The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
      2. 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).
      3. If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

    3. Check the VSC sensor.

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

  5. Yaw Rate Sensor Zero Point Voltage Check

    NOTICE:
    Before performing the yaw rate sensor zero point voltage check, perform linear valve offset learning.


    1. Check that park (P) is selected.

    2. Keep the vehicle stationary on a level surface for 1 second or more.

    3. Check that the brake warning / yellow (minor malfunction) light blinks.



  6. Yaw Rate Sensor Output Check



      C137757E03
    1. 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.

      NOTICE:
      1. Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
      2. Do not allow the wheels to spin.
      3. Do not turn the power switch off while turning.
      4. Do not push the P position switch while turning, but changing the vehicle speed, stopping, or driving in reverse is acceptable.

    2. Stop the vehicle and push the P position switch. Check that the skid control buzzer sounds for 3 seconds.

      HINT:
      1. If the skid control buzzer sounds, the sensor check has completed normally.
      2. If the skid control buzzer does not sound, check the skid control buzzer circuit (Click here), then perform the sensor check again.
      3. If the skid control buzzer still does not sound, the yaw rate sensor may be malfunctioning. Check for DTCs.



  7. End of Sensor Check



      BR03904E84
    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.

      NOTICE:
      1. When the yaw rate sensor, acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the sensor check is completed.
      2. If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.



  8. Read Sensor Check DTCs



      C166029E14
    1. Using SST, connect terminals TC and CG of the DLC3.

      SST
      09843-18040  
      Text in Illustration 
      *1
      Front view of DLC3



    2. Count the number of blinks of the ABS warning, brake warning / yellow (minor malfunction) and slip indicator lights.


      C169592E01

      NOTICE:
      1. If only DTCs other than the Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.
      2. 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:
      1. If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
      2. See "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.

      HINT:
      1. If the power switch is not turned on (IG) after SST is removed from the DLC3, the previous Test Mode will continue.
      2. If the power switch is turned on (IG) with terminals TS and CG connected, the previous Test Mode will continue.

  9. Sensor Check DTCs

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

    VSC Sensor 
    DTC Code
    Detection Item
    Trouble Area
    71
    Yaw Rate Sensor
    1. Sensor installation
    2. Yaw rate and acceleration sensor

    Electronically Controlled Brake System Sensor 
    DTC Code
    Detection Item
    Trouble Area
    71
    Stroke Sensor Zero Point Learning Malfunction
    1. Brake pedal stroke sensor
    2. Brake pedal stroke sensor circuit

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