LIN COMMUNICATION SYSTEM Air Conditioning Control Panel does not Operate

DTC Code DTC Name
Air Conditioning Control Panel does not Operate

DESCRIPTION

When a switch of the heater control switch board* or No. 2 air conditioning control assembly is operated, the heater control switch board* or No. 2 air conditioning control assembly uses LIN communication to communicate with the air conditioning amplifier. If a switch of the heater control switch board* or No. 2 air conditioning control assembly does not operate properly, a problem with the LIN communication between the heater control switch board* or No. 2 air conditioning control assembly and air conditioning amplifier may be causing the malfunction.

  • *: w/o Navigation System

WIRING DIAGRAM

C263746E02

PROCEDURE

  1. CHECK SWITCH OPERATION

    1. Check the switch operation.

      Result

      Result

      Proceed to

      Heater control switch board does not operate*

      A

      No. 2 Air conditioning control assembly does not operate

      B

      *: w/o Navigation System

    B

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)Click here

    A

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - HEATER CONTROL SWITCH BOARD)

    1. Disconnect the G13 air conditioning amplifier assembly connector.

    2. Disconnect the H32 heater control switch board connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G13-37 (LIN1) - H32-10 (LIN1)

      Always

      Below 1 Ω

      G13-37 (LIN1) or H32-10 (LIN1) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    OK

    GO TO AIR CONDITIONING SYSTEM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)

    1. Disconnect the G12 air conditioning amplifier assembly connector.

    2. Disconnect the T2 No. 2 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

      G12-13 (RLIN) - T2-6 (RLIN)

      Always

      Below 1 Ω

      G12-13 (RLIN) or T2-6 (RLIN) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    OK

    GO TO AIR CONDITIONING SYSTEM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR