ANTI-LOCK BRAKE SYSTEM TEST MODE PROCEDURE


  1. WARNING LIGHT INITIAL CHECK


    1. A01CHP7E03

      Release the parking brake.

      Note

      Before releasing the parking brake, set chocks to hold the vehicle for safety.

      Tech Tips

      When the parking brake is applied, the level of the brake fluid is low or the vacuum is low, the brake warning light comes on.

    2. When the ignition switch is turned to the ON position, check that the ABS and brake warning lights come on for approximately 3 seconds.

      Tech Tips

      If the ECU stores a DTC, the ABS and brake warning lights will come on.

      If the indicator remains 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 circuit (Remains on)

      Click here

      Brake warning light circuit (Does not come on)

      Click here

  2. SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (for Using an Intelligent Tester)

    Tech Tips

    If the ignition switch is turned from ON to ACC or LOCK during Test Mode (signal check), DTCs of the signal check function will be erased.


    1. Procedure to enter Test Mode.


      1. Start the engine.

        Tech Tips

        Idle the engine for 20 seconds or more to ensure high vacuum in the vacuum booster.

      2. Turn the ignition switch off.

        Tech Tips

        When the ignition switch is off, to prevent vacuum loss, do not depress the brake pedal.

      3. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

        Note

        Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

      4. A01CIHHE01

        Connect the intelligent tester to the DLC3.

      5. Check that the steering wheel is centered and apply the parking brake.

      6. Turn the ignition switch to the ON position.

      7. A01CH7R

        Set the intelligent tester to Test Mode (select "Signal Check").

        Tech Tips

        Refer to the intelligent tester's operation manual for further details.

      8. After the ABS warning light comes on for several seconds (initial valve check) and check that ECU code 9 is output.

      9. Check that the ABS warning light starts to blink after ECU code 9 is indicated. This transition shows that the Test Mode is activated.

      10. A blinking pattern of the ABS warning light (transition from ECU code 3 to Test Mode) is shown below as an example.

        A01CJ71E01

        Note


        • Do not depress the brake pedal until the entry of the Test Mode is confirmed.

        • If the ABS warning light remains on even after the ECU code is output, start the engine. Then, check that Test Mode is entered after several seconds. The indication of the warning light after the ECU code is output depends on vacuum of the vacuum booster. When the vacuum is high enough, Test Mode is entered. When the vacuum is not high enough, the warning light remains on.

      11. A01CJB1E69

        Check that the ABS warning light is blinking in Test Mode.

        Tech Tips

        If the ABS warning light does not blink, inspect the TS and CG terminal circuit and ABS warning light circuit.

        Trouble Area See procedure
        TS and CG terminal circuit

        Click here

        ABS warning light circuit (Does not come on)

        Click here

      12. Check the ABS sensor.

        Tech Tips

        Check that the ABS warning light is blinking in Test Mode and perform the check.

  3. MASTER CYLINDER PRESSURE SENSOR CHECK (for Using an Intelligent Tester)

    Tech Tips

    If the engine is running, stop the engine once and then turn the ignition switch to the ON position.


    1. Leave the vehicle stationary and release the brake pedal for 1 second or more, and depress the brake pedal with a force of 186 N (19 kgf, 42 lbf) or more.

    2. Check that the ABS warning light comes on.

    3. Depress the brake pedal for 1 second with the ABS warning light illuminated and release it.

    4. Check that the blinking pattern of the ABS warning light returns to the pattern shown in Test Mode.

      A01CHJME01

      Note


      • Do not depress the brake pedal several times.

      • If the ABS warning light does not come on although the brake pedal is depressed, the master cylinder pressure sensor may be defective.

  4. VACUUM SENSOR CHECK (for Using an Intelligent Tester)

    Tech Tips

    If the engine is running, stop the engine once and then turn the ignition switch to the ON position.


    1. Depress the brake pedal several times.

    2. Check that the ABS warning light comes on.

      A01CGZGE01

      Note


      • If the ABS warning light does not come on after depressing the brake pedal continuously, the vacuum sensor may be defective.

      • When the parking brake is released, the vacuum warning buzzer may sound.

      • Soon after the warning light changes from blinking to staying on, stop the pumping operation.

  5. SPEED SENSOR CHECK (for Using an Intelligent Tester)


    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.

      Tech Tips

      The sensor check may not be completed if wheelspin occurs.

    2. Stop the vehicle.

      Note


      • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.

      • If the vehicle speed exceeds 80 km/h (50 mph) after the ABS warning light goes off, a sensor check code will be stored again.

        Complete the check before the speed reaches 80 km/h (50 mph).

      • If the sensor check has not been completed, the ABS warning light blinks while driving and the ABS does not operate.

      Tech Tips

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

  6. END OF SENSOR CHECK (for Using an Intelligent Tester)


    1. A01CJB1E69

      If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is driving.

      Note


      • When the master cylinder pressure sensor, vacuum sensor, and speed sensor checks are completed, the sensor check is completed.

      • If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.

  7. READ DTC OF SIGNAL CHECK FUNCTION (for Using an Intelligent Tester)


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

      Note


      • If only the DTCs are displayed, repair the malfunction area and clear the DTCs.

      • If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs and perform the Test Mode inspection.

      Tech Tips

      See the list of DTC (See procedure "A").

  8. SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (for Using an SST Check Wire)

    Tech Tips

    If the ignition switch is turned from ON to ACC or LOCK during Test Mode (signal check), DTCs of the signal check function will be erased.


    1. Procedure to enter Test Mode.


      1. Start the engine

        Tech Tips

        Idle the engine for 20 seconds or more to ensure high vacuum in the vacuum booster.

      2. Turn the ignition switch off.

        Tech Tips

        When the ignition switch is off, to prevent vacuum loss, do not depress the brake pedal.

      3. A01CJDGE07

        Check that the steering wheel is centered and apply the parking brake.

      4. Using SST, connect terminals TS and CG of the DLC3.

        SST
        09843-18040
      5. Turn the ignition switch to the ON position.

      6. After the ABS warning light comes on for several seconds (initial valve check), check that ECU code 9 is output.

      7. Check that the ABS warning light starts to blink after ECU code 9 is indicated. This transition shows that the Test Mode is activated.

      8. A blinking pattern of the ABS warning light (transition from ECU code 3 to Test Mode) is shown below as an example.

        A01CJ71E01

        Note


        • Do not depress the brake pedal until the entry of the Test Mode is confirmed.

        • If the ABS warning light remains on even after the ECU code is output, start the engine. Then, check that Test Mode is entered after several seconds. The indication of the warning light after the ECU code is output depends on vacuum of the vacuum booster. When the vacuum is high enough, Test Mode is entered. When the vacuum is not high enough, the warning light remains on.

      9. A01CJB1E69

        Check that the ABS warning light is blinking in Test Mode.

        Tech Tips

        If the ABS warning light does not blink, inspect the TS and CG terminal circuit and ABS warning light circuit.

        Trouble Area See procedure
        TS and CG terminal circuit

        Click here

        ABS warning light circuit (Does not come on)

        Click here

      10. Check the ABS sensor.

        Tech Tips

        Check that the ABS warning light is blinking in Test Mode and perform the check.

  9. MASTER CYLINDER PRESSURE SENSOR CHECK (for Using an SST Check Wire)

    Tech Tips

    If the engine is running, stop the engine once and then turn the ignition switch to the ON position.


    1. Leave the vehicle stationary condition and release the brake pedal for 1 second or more, and depress the brake pedal with a force of 186 N (19 kgf, 42 lbf) or more.

    2. Check that the ABS warning light comes on.

    3. Depress the brake pedal for 1 second with the ABS warning light illuminated and release it.

    4. Check that the blinking pattern of the ABS warning light returns to the pattern shown in Test Mode.

      A01CHJME01

      Note


      • Do not depress the brake pedal several times.

      • If the ABS warning light does not come on although the brake pedal is depressed, the master cylinder pressure sensor may be defective.

  10. VACUUM SENSOR CHECK (for Using an SST Check Wire)

    Tech Tips

    If the engine is running, stop the engine once and then turn the ignition switch to the ON position.


    1. Depress the brake pedal several times.

    2. Check that the ABS warning light comes on.

      A01CGZGE01

      Note


      • If the ABS warning light does not come on after depressing the brake pedal continuously, the vacuum sensor may be defective.

      • When the parking brake is released, the vacuum warning buzzer may sound.

      • Soon after the warning light changes from blinking to staying on, stop the pumping operation.

  11. SPEED SENSOR CHECK (for Using an SST Check Wire)


    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.

      Tech Tips

      The sensor check may not be completed if wheelspin occurs.

    2. Stop the vehicle.

      Note


      • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.

      • If the vehicle speed exceeds 80 km/h (50 mph) after the ABS warning light goes off, a sensor check code will be stored again.

        Complete the check before the speed reaches 80 km/h (50 mph).

      • If the sensor check has not been completed, the ABS warning light blinks while driving and the ABS does not operate.

      Tech Tips

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

  12. END OF SENSOR CHECK (for Using an SST Check Wire)


    1. A01CJB1E69

      If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is driving.

      Note


      • When the master cylinder pressure sensor, vacuum sensor, and speed sensor checks are completed, the sensor check is completed.

      • If the sensor check is not completed, the ABS warning light blinks even while the vehicle is driving and the ABS does not operate.

  13. READ DTC OF SIGNAL CHECK FUNCTION (for Using an SST Check Wire)


    1. A01CI8KE01

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

      SST
      09843-18040
    2. Count the number of blinks of the ABS and VSC warning lights.

      A01CJ2QE04

      Note


      • If only the DTCs are displayed, repair the malfunction area and clear the DTCs.

      • If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs and perform the Test Mode inspection.

      Tech Tips


      • If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.

      • See the list of DTC (See procedure "A").

    3. After performing the check, disconnect the SST from terminals TS and CG, and TC and CG of the DLC3 and turn the ignition switch off.

    4. Turn the ignition switch to the ON position.

      Tech Tips


      • If the ignition switch is not turned to the ON position after the SST is removed from the DLC3, the previous Test Mode will continue.

      • If the ignition switch is turned to the ON position with terminals TS and CG shorted, the previous Test Mode will continue.

  14. DTC OF TEST MODE (SIGNAL CHECK) FUNCTION (Procedure "A")

    ABS sensor:
    DTC Code Detection Item Trouble Area
    C1271/71 Low output signal of front speed sensor RH
    • Front speed sensor RH

    • Sensor installation

    • Speed sensor rotor

    C1272/72 Low output signal of front speed sensor LH
    • Front speed sensor LH

    • Sensor installation

    • Speed sensor rotor

    C1273/73 Low output signal of rear speed sensor RH
    • Rear speed sensor RH

    • Sensor installation

    • Speed sensor rotor

    C1274/74 Low output signal of rear speed sensor LH
    • Rear speed sensor LH

    • Sensor installation

    • Speed sensor rotor

    C1275/75 Abnormal change in output signal of front speed sensor RH
    • Front speed sensor RH

    • Speed sensor rotor

    C1276/76 Abnormal change in output signal of front speed sensor LH
    • Front speed sensor LH

    • Speed sensor rotor

    C1277/77 Abnormal change in output signal of rear speed sensor RH
    • Rear speed sensor RH

    • Speed sensor rotor

    C1278/78 Abnormal change in output signal of rear speed sensor LH
    • Rear speed sensor LH

    • Speed sensor rotor

    C1281/81 Master cylinder pressure sensor output malfunction
    • Stop light switch

    • Master cylinder pressure sensor

    C1285/85 Vacuum sensor output malfunction Vacuum sensor

    Tech Tips

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