LIN COMMUNICATION SYSTEM Air Conditioning Control Panel does not Operate

DESCRIPTION

When a switch of the integration control and panel assembly or air conditioning control assembly* is operated, the integration control and panel assembly or air conditioning control assembly* uses LIN communication to communicate with the air conditioning amplifier. If a switch of the integration control and panel assembly or air conditioning control assembly* does not operate properly, a problem with the LIN communication between the integration control and panel assembly or air conditioning control assembly* and air conditioning amplifier may be causing the malfunction.


WIRING DIAGRAM

A00989WE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SWITCH OPERATION


    1. Check the switch operation.

      Result
      Result Proceed to
      Integration control and panel assembly does not operate A
      Air conditioning panel assembly does not operate B

    B

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - INTEGRATION CONTROL AND PANEL)


    1. Disconnect the G25 air conditioning amplifier assembly connector.

    2. Disconnect the G23 integration control and panel assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G25-37 (LIN1) - G23-3 (LIN1) Always Below 1 Ω
      G25-37 (LIN1) or G23-3 (LIN1) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for Automatic Air Conditioning System) A
      OK (for Manual Air Conditioning System) B
      NG C

    B

    Go to AIR CONDITIONING SYSTEM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    Go to AIR CONDITIONING SYSTEM Click here

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL)


    1. Disconnect the G24 air conditioning amplifier assembly connector.

    2. Disconnect the T3 air conditioning control assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G24-13 (RLIN) - T3-3 (RLIN) Always Below 1 Ω
      G24-13 (RLIN) or T3-3 (RLIN) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for Automatic Air Conditioning System) A
      OK (for Manual Air Conditioning System) B
      NG C

    B

    Go to AIR CONDITIONING SYSTEM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    Go to AIR CONDITIONING SYSTEM Click here