AIR CONDITIONING SYSTEM Air Conditioning Control Panel Circuit

DESCRIPTION

The radio receiver assembly switch signals are sent to the air conditioning amplifier assembly via CAN communication.

WIRING DIAGRAM


  1. for Navigation Receiver Type

    A01VZ9HE03

  2. for Radio and Display Type

    A01W1P1E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Use the GTS to check if the CAN communication system is functioning normally.

      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output (w/ Central Gateway ECU) B
      CAN DTCs are output (w/o Central Gateway ECU) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK AVC-LAN COMMUNICATION CIRCUIT


    1. Check for an open or short in all AVC-LAN communication circuits.


      OK
      There is no open or short circuit.

    NG

    REPAIR AVC-LAN COMMUNICATION CIRCUIT

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND)


    1. Disconnect the H97 radio receiver assembly connector.*1

    2. Disconnect the H182 and H179 radio receiver assembly connectors.*2

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H97-15 (IG) - H97-12 (GND1)*1 Engine switch off Below 1 V
      H97-15 (IG) - H97-12 (GND1)*1 Engine switch on (IG) 11 to 14 V
      H97-16 (ACC1) - H97-12 (GND1)*1 Engine switch off Below 1 V
      H97-16 (ACC1) - H97-12 (GND1)*1 Engine switch on (ACC)

      11 to 14 V*3

      9.5 to 14 V*4
      H97-17 (+B1) - H97-12 (GND1)*1 Always

      11 to 14 V*3

      9.5 to 14 V*4
      H179-1 (IG) - H182-7 (GND1)*2 Engine switch off Below 1 V
      H179-1 (IG) - H182-7 (GND1)*2 Engine switch on (IG) 11 to 14 V
      H182-3 (ACC1) - H182-7 (GND1)*2 Engine switch off Below 1 V
      H182-3 (ACC1) - H182-7 (GND1)*2 Engine switch on (ACC)

      11 to 14 V*3

      9.5 to 14 V*4
      H182-4 (+B1) - H182-7 (GND1)*2 Always

      11 to 14 V*3

      9.5 to 14 V*4

      • *1: for Navigation Receiver Type

      • *2: for Radio and Display Type

      • *3: except 6AR-FSE

      • *4: for 6AR-FSE

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H97-12 (GND1) - Body ground*1 Always Below 1 Ω
      H182-7 (GND1) - Body ground*2 Always Below 1 Ω

      • *1: for Navigation Receiver Type

      • *2: for Radio and Display Type

      Result
      Result Proceed to
      OK A
      NG (except 6AR-FSE) B
      NG (for 6AR-FSE) C

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    GO TO STOP AND START SYSTEM Click here