ELECTRONICALLY CONTROLLED BRAKE SYSTEM(w/ Vacuum Brake Booster) PRECAUTION


  1. HANDLING PRECAUTION


    1. Do not remove or install VSC parts such as the steering sensor or acceleration sensor (yaw rate sensor) except when required, as they need to be adjusted correctly after removal and installation.

    2. Be sure to perform preparation before work and confirmation after work is completed by following the directions in the repair manual when working on the electronically controlled brake system.

    3. Be sure to remove and install the ECU, brake actuator assembly, sensors, etc. with the engine switch off unless it is otherwise specified in the inspection procedure.

    4. If the ECU, brake actuator assembly or a sensor has been removed and installed, it is necessary to check the system for problems after the parts have been reassembled. Check for DTCs using the GTS. Also check that the system functions and signals received by the ECU are normal using Test Mode.

    5. If replacing the skid control ECU (brake actuator assembly), always replace it with a new one (if the skid control ECU (brake actuator assembly) is not replaced with a new one, DTCs may be stored).

      Note

      Do not use a skid control ECU (brake actuator assembly) from another vehicle (a vehicle display model, etc.).

  2. DTC PRECAUTION


    1. Some DTCs cannot be cleared only by repairing the malfunctioning parts.

    2. To turn off the warning (light illuminated), clear the DTC or perform the operation below.

      Warning Clearing Procedure
      DTC No. Procedure

      C1243

      C1245

      C13AF

      C1401

      C1402

      C1403

      C1404

      C1413

      C1414

      C1415

      C1416

      1. Repair or replace with new part

      2. Turn engine switch on (IG)

      3. Drive (30 km/h or higher for 30 seconds) → Warning light turns off

      C1380

      C1426

      C1430

      C1431

      1. Repair or replace with new part

      2. Turn the engine switch on (IG) and stop the vehicle for 5 seconds or more, and then lightly depress the brake pedal 2 or 3 times → Warning light turns off

      C1432

      C1433

      1. Repair or replace with new part

      2. Turn engine switch on (IG) after idling for 3 seconds → Warning light turns off
      C1435

      1. Repair or replace with new part

      2. Turn engine switch on (IG) after idling for 10 seconds → Warning light turns off

      Note


      • When a warning is output (light illuminated), the fail-safe function prevents system operation. Take due care when driving or braking.

      • Even after the DTC is cleared, the DTC will be stored again if the malfunction continues.

    3. When 2 or more DTCs are detected, perform diagnosis for each DTC, one by one until the problem is identified.

  3. CHASSIS DYNAMOMETER PRECAUTION

    When testing with a 2-wheel drum tester such as a speedometer tester, combination tester for the speedometer and brakes, or chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and disable the TRC and VSC systems.

    CAUTION:


    • Do not use the drum tester with any of the lock chains disconnected.

      B006FP8C02
      *A for 2WD *B for AWD

    • Using the drum tester with a lock chain disconnected could cause the vehicle to begin moving unexpectedly.

    • Do not use the drum tester while the TRAC or VSC is able to operate.

      B006FA6C02
      *A for 2WD *B for AWD

    • TRAC or VSC operation could cause the vehicle to begin moving unexpectedly.

    Note

    Secure the vehicle with lock chains for safety.

    Tech Tips


    • If Inspection Mode is not used, the vehicle may unexpectedly move off the dynamometer because of TRC and VSC operation.

    • The VSC OFF switch (No. 2 satellite switch set) must not be used to disable TRC and VSC operation when the vehicle is to be operated on a dynamometer. Pressing the VSC OFF switch (No. 2 satellite switch set) does not disable TRC and VSC operation completely.


    1. Activating Inspection Mode (When Using the GTS)


      1. Ensure that the engine switch is off and the engine is stopped.

      2. Connect the GTS to the DLC3.

      3. Turn the engine switch on (IG).

      4. Turn the GTS on.

      5. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Inspection Mode.


        Chassis > ABS/VSC/TRC > Utility
        Tester Display
        Inspection Mode

      6. Check that the multi-information display (TRC OFF message) and VSC OFF indicator lights come on.

        Tech Tips


        • If the multi-information display (TRC OFF message) and VSC OFF indicator lights do not come on, repeat the steps.

        • Using the GTS to cancel Inspection Mode causes the system to enter normal mode.

    2. Activating Inspection Mode (When not Using the GTS)

      Tech Tips

      Perform steps "D" to "H" within 30 seconds.


      1. Turn the engine switch on (IG) (Step "A").

      2. Release the parking brake (Step "B").

      3. Turn the engine switch off (Step "C").

      4. With the brake pedal depressed, start the engine (Step "D").

      5. While holding the brake pedal down, apply the parking brake (Step "E").

      6. With the parking brake applied, release and depress the brake pedal twice: release→depress→release→depress (Step "F").

      7. While holding the brake pedal down, release and apply the parking brake twice: release→apply→release→apply (Step "G").

      8. With the parking brake applied, release and depress the brake pedal twice: release→depress→release→depress (Step "H").

      9. Check that the multi-information display (TRC OFF message) and VSC OFF indicator lights come on (Step "I").

        Note

        Turn the engine switch off when 60 seconds or more have elapsed since inspection mode was entered. If the engine switch is turned off before 60 seconds or more elapse, inspection mode continues when the engine switch is turned on (IG).

        Tech Tips


        • If the multi-information display (TRC OFF message) and VSC OFF indicator lights do not come on in step "I", repeat steps "A" to "I".

        • Turning the engine switch off ends Inspection Mode.