AIR CONDITIONING SYSTEM Air Conditioning Control Panel Circuit

DESCRIPTION

w/ Multi-display:

• The multi-media module receiver assembly or radio receiver assembly switch signals are sent to the air conditioning amplifier assembly via CAN communication.

w/o Multi-display:

• The radio receiver assembly switch signals are sent to the accessory meter assembly via AVC-LAN communication.

  The accessory meter assembly then sends these signals to the air conditioning amplifier assembly via LIN communication.

WIRING DIAGRAM

1. w/ Multi-display

   

2. w/o Multi-display

   

INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM MODEL

   Result
   Result Proceed to w/ Multi-display A w/o Multi-display B

   
   

   B

   CHECK AVC-LAN COMMUNICATION CIRCUIT Click here

   A

2. 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 B

   
   

   B

   GO TO CAN COMMUNICATION SYSTEM Click here

   A

3. CHECK AVC-LAN COMMUNICATION CIRCUIT

   
   

   1. Check for an open or short in all AVC-LAN communication circuits Click here (w/ Navigation System)) Click here (w/o Navigation System)).

      OK
      There is no open or short circuit.

   
   

   NG

   REPAIR AVC-LAN COMMUNICATION CIRCUIT

   OK

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

   
   

   1. Disconnect the H97 multi-media module receiver assembly connector.

   2. 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) Engine switch off Below 1 V H97-15 (IG) - H97-12 (GND1) Engine switch on (IG) 11 to 14 V H97-16 (ACC1) - H97-12 (GND1) Engine switch off Below 1 V H97-16 (ACC1) - H97-12 (GND1) Engine switch on (ACC) 11 to 14 V H97-17 (+B1) - H97-12 (GND1) Always 11 to 14 V

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

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

5. CHECK AVC-LAN COMMUNICATION CIRCUIT

   
   

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

      OK
      There is no open or short circuit.

   
   

   NG

   REPAIR AVC-LAN COMMUNICATION CIRCUIT

   OK

6. CHECK LIN COMMUNICATION CIRCUIT

   
   

   1. Check for an open or short in all LIN communication circuits Click here.

      OK
      There is no open or short circuit.

   
   

   NG

   REPAIR LIN COMMUNICATION CIRCUIT

   OK

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

   
   

   1. Disconnect the H82 and H42 radio receiver assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition H42-16 (ACC) - H42-9 (GND) Engine switch off Below 1 V H42-16 (ACC) - H42-9 (GND) Engine switch on (ACC) 11 to 14 V H82-1 (B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition H42-9 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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