ELECTRONICALLY CONTROLLED BRAKE SYSTEM > ABS Warning Light does not Come ON

for Preparation Click here


DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.

WIRING DIAGRAM

Refer to ABS Warning Light Remains ON (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve (Click here).

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication system DTC is output (Click here).

    Result:

    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B



B
INSPECT CAN COMMUNICATION SYSTEM (Click here)
A


2.CHECK ABS WARNING LIGHT

  1. Disconnect the skid control ECU connector.

  1. Turn the power switch on (IG).

  1. Check that the ABS warning light comes on.

    OK:
    The ABS warning light comes on.


    Result:

    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C

    HINT:
    If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (Click here).



B
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)

C
Go to step 3
A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)  

3.INSPECT COMBINATION METER

  1. Turn the power switch off.

  1. Reconnect the skid control ECU connector.

  1. Perform the Active Test of the combination meter (meter CPU) using the intelligent tester (Click here).

  1. Check the combination meter.

    OK:
    The ABS warning light turns on or off in accordance with the intelligent tester operation.


    Result:

    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C

    HINT:
    If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



B
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)

C
REPLACE COMBINATION METER (Click here)
A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)