AIRBAG SYSTEM TC and CG Terminal Circuit

DTC Code DTC Name
TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are displayed by blinking of the SRS warning light.

Tip:

  • When multiple warning lights in the combination meter blink continuously, a ground short in the wiring or an sensor connected to terminal TC of the DLC3 is suspected.

  • A DTC output mode signal is transmitted via the CAN communication system to each sensor including the airbag sensor assembly. Thus when multiple systems do not enter DTC output mode, there may be an ECM malfunction.

WIRING DIAGRAM

  1. for 1KR-FE:

    C248718E34

  2. for 1PP:

    C305079E01

PROCEDURE

  1. CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)

    1. Turn the ignition switch off.

    2. for 1KR-FE:

      1. Disconnect the A34 ECM connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        E8-13 (TC) - A34-57 (TC)

        Always

        Below 1 Ω

    3. for 1PP:

      1. Disconnect the B56 ECM connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        E8-13 (TC) - B56-5 (TC)

        Always

        Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE WIRE HARNESS

    OK

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

    1. C204945C29

      *1

      DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E8-4 (CG) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE WIRE HARNESS

    OK

  3. CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)

    1. C204945C30

      *1

      DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E8-13 (TC) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU