AIRBAG SYSTEM TC and CG Terminal Circuit

DESCRIPTION

DTC indication mode is set by connecting Terminals TC and CG of the DLC3. The DTCs are indicated through SRS warning light blinking patterns.

Tech Tips

If the warning lights blink continuously, there may be a ground short in the wiring of Terminal TC of the DLC3 or an internal ground short of TC in any ECU.

WIRING DIAGRAM

A01KGO0E01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK WIRE HARNESS (DLC3 - AIRBAG ECU ASSEMBLY)

    A01KF1FE03
    Text in Illustration
    *a

    Front view of wire harness connector

    (DLC3)
    *b

    Rear view of wire harness connector

    (to Airbag ECU Assembly)

    1. Turn the ignition switch off.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    3. Disconnect Connector A23.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D3-13 (TC) - A23-12 (TC) Always Below 1 Ω
      D3-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPLACE COWL WIRE

    OK

  2. CHECK WIRE HARNESS (DLC3 - AIRBAG ECU ASSEMBLY)

    A01KICXE04
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Airbag ECU Assembly)

    1. Confirm that Connector A23 is disconnected.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A23-12 (TC) - Body ground Always 1 MΩ or higher

    NG

    CHECK WIRE HARNESS (DLC3 - AIRBAG ECU ASSEMBLY) Click here

    OK

    REPLACE AIRBAG ECU ASSEMBLY Click here

  3. CHECK WIRE HARNESS (DLC3 - AIRBAG ECU ASSEMBLY)

    A01KICXE04
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Airbag ECU Assembly)

    1. Confirm that Connector A23 is disconnected.

    2. Disconnect Connector E7.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A23-12 (TC) - Body ground Always 1 MΩ or higher

    NG

    CONFIRM VEHICLE CONFIGURATION Click here

    OK

    REPLACE ECM Click here

  4. CONFIRM VEHICLE CONFIGURATION


    1. Confirm the configuration of the vehicle and select an appropriate procedure from the table below.

      Result
      Configuration Proceed to
      w/ ABS A
      w/o ABS B

    B

    REPLACE COWL WIRE

    A

  5. CHECK WIRE HARNESS (DLC3 - AIRBAG ECU ASSEMBLY)

    A01KICXE04
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Airbag ECU Assembly)

    1. Confirm that Connector A23 is disconnected.

    2. Disconnect Connector S7.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A23-12 (TC) - Body ground Always 1 MΩ or higher

    NG

    REPLACE COWL WIRE

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here