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TEL ADAPTER UNIT: Diagnosis Procedure

  1. CHECK FUSE 

    Check for blown fuses.

    Power source Fuse No.
    Battery 34
    Ignition switch ACC or ON 19

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT 

    Check voltage between TEL adapter unit harness connector and ground.

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Battery power supply B237 1 OFF Battery voltage
    ACC power supply B237 2 ACC Battery voltage

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Check harness between TEL adapter unit and fuse.

  3. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect TEL adapter unit connector.
    3. Check continuity between TEL adapter unit harness connector and ground.
      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground B237 4, 14 OFF Existed

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

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