AIRBAG SYSTEM TC and CG Terminal Circuit

DESCRIPTION

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

Tech Tips

When one or more of the warning lights blinks continuously, the cause may be a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU.

WIRING DIAGRAM

A01DY33E05

INSPECTION PROCEDURE

CAUTION:

Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag deployment.


  1. Turn the ignition switch OFF.

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

PROCEDURE


  1. CHECK WIRE HARNESS (DLC3 - CENTER AIRBAG SENSOR AND BODY GROUND)

    A01DVQAE02

    1. Disconnect the A14 ECU connector.

    2. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      D1-13 (TC) - A14-15 (TC) Below 1 Ω
      D1-4 (CG) - Body ground Below 1 Ω
      A14-15 (TC) - Body ground 1 MΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY