ELECTRONICALLY CONTROLLED BRAKE SYSTEM > TC and CG Terminal Circuit

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DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light.

WIRING DIAGRAM


C212028E04

HINT:
When the warning lights continue to blink, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in one or more ECUs is suspected.


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 HARNESS AND CONNECTOR (TC of DLC3 - POWER MANAGEMENT CONTROL ECU)

  1. Disconnect the power management control ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-13 (TC) - H3-11 (TC)
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)


    C207407E16

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-4 (CG) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *a
    		Front view of DLC3



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND)


    C207407E17

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-13 (TC) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Front view of DLC3

    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
REPAIR OR REPLACE WIRE HARNESS OR EACH ECU
A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER (Click here)