AIRBAG SYSTEM > TC and CG Terminal Circuit

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DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.

HINT:
  1. Make sure that DTC B1281 has not been output. If DTC B1281 has been output, refer to the multiplex communication system.
  2. When each warning light keeps blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

WIRING DIAGRAM


C123568E01


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (DLC3 - ECM)


    C157651E02
  1. Turn the ignition switch off.

  1. Disconnect the A12 connector from the center airbag sensor.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for 2AD-FHV, 2AD-FTV (for DPF), 2AD-FTV (for CCo) 
    Tester Connection
    Specified Condition
    E16-13 (TC) - A12-26 (TC)
    Below 1 Ω
    for 1AZ-FE, for 2AZ-FE 
    Tester Connection
    Specified Condition
    E16-13 (TC) - A12-27 (TC)
    Below 1 Ω


NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK


2.CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)


    H100769E42
  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    Specified Condition
    E16-4 (CG) - Body ground
    Below 1 Ω


NG
REPAIR OR REPLACE WIRE HARNESS
OK


3.CHECK WIRE HARNESS (TC OF DLC3)


    C126742E56
  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    Specified Condition
    E16-13 (TC) - Body ground
    1 MΩ or higher


NG
REPAIR OR REPLACE WIRE HARNESS
OK


4.REPLACE ECM
  1. Replace the ECM.

  1. Check the DTC of the ECM.

    Result 
    Result
    Proceed to
    DTC output mode is set (except center airbag sensor).
    A
    Normal system code is output.
    B
    DTC is output.
    C


B
END

C
GO TO INSPECTION PROCEDURE OF DTC OUTPUT
A

REPAIR OR REPLACE WIRE HARNESS OR EACH ECU