AIR CONDITIONING SYSTEM Air Conditioning Control Panel Circuit

DESCRIPTION

The radio receiver assembly (A/C control panel) switch signals are sent to the air conditioning amplifier assembly via CAN communication.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Using the GTS, check if the CAN communication system is functioning normally.

      Click here

      Result
      Result Proceed to CAN communication system DTCs are not output A CAN communication system DTCs are output B

   
   

   B

   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.

      w/ Navigation System: Click here

      w/ Audio and Visual System (for 12.3 Inch Display): Click here

      w/ Audio and Visual System (for 8 Inch Display): Click here

      OK
      There is no open or short circuit.

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR AVC-LAN COMMUNICATION CIRCUIT

   OK

3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL) - POWER SOURCE AND BODY GROUND)

   
   

   1. Disconnect the J50 radio receiver assembly (A/C control panel) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition J50-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition J50-12 (GND1) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to for 8 Inch Display A for 12.3 Inch Display B

   
   

   B

   CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - POWER SOURCE, BODY GROUND) Click here

   A

5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - POWER SOURCE AND BODY GROUND)

   
   

   1. Disconnect the J56 multi-display assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition J56-23 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition J56-13 (GND1) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to w/o Stop and Start System A w/ Stop and Start System B

   
   

   B

   CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), MULTI-DISPLAY ASSEMBLY - ENGINE STOP AND START ECU) Click here

   A

7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), MULTI-DISPLAY ASSEMBLY - POWER SOURCE)

   
   

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

      Standard Voltage
      Tester Connection Condition Specified Condition J50-17 (+B1) - Body ground Always 11 to 14 V J50-16 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V J56-12 (B) - Body ground Always 11 to 14 V J56-24 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), MULTI-DISPLAY ASSEMBLY - ENGINE STOP AND START ECU)

   
   

   1. Disconnect the J46 engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition J46-15 (AC42) - J50-16 (ACC1) Always Below 1 Ω J46-15 (AC42) - J56-24 (ACC) Always Below 1 Ω J46-12 (B42) - J50-17 (+B1) Always Below 1 Ω J46-13 (B43) - J56-12 (B) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), MULTI-DISPLAY ASSEMBLY - ENGINE STOP AND START ECU)

   
   

   1. Reconnect the J46 engine stop and start ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition J50-17 (+B1) - Body ground Always 9.5 to 14 V J50-16 (ACC1) - Body ground Engine switch on (ACC) 9.5 to 14 V J56-12 (B) - Body ground Always 9.5 to 14 V J56-24 (ACC) - Body ground Engine switch on (ACC) 9.5 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

   GO TO STOP AND START SYSTEM Click here

10. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - POWER SOURCE, BODY GROUND)

    
    

    1. Disconnect the J56 accessory meter assembly connector.

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

       Standard Voltage
       Tester Connection Condition Specified Condition J56-23 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

       Standard Resistance
       Tester Connection Condition Specified Condition J56-13 (GND1) - Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

11. CONFIRM MODEL

    
    

    1. Choose the model to be inspected.

       Result
       Result Proceed to w/o Stop and Start System A w/ Stop and Start System B

    
    

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), ACCESSORY METER ASSEMBLY - ENGINE STOP AND START ECU) Click here

    A

12. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), ACCESSORY METER ASSEMBLY - POWER SOURCE)

    
    

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

       Standard Voltage
       Tester Connection Condition Specified Condition J50-17 (+B1) - Body ground Always 11 to 14 V J50-16 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V J56-12 (B) - Body ground Always 11 to 14 V J56-24 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

13. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), ACCESSORY METER ASSEMBLY - ENGINE STOP AND START ECU)

    
    

    1. Disconnect the J46 engine stop and start ECU connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition J46-15 (AC42) - J50-16 (ACC1) Always Below 1 Ω J46-15 (AC42) - J56-24 (ACC) Always Below 1 Ω J46-12 (B42) - J50-17 (+B1) Always Below 1 Ω J46-13 (B43) - J56-12 (B) Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

14. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL), ACCESSORY METER ASSEMBLY - ENGINE STOP AND START ECU)

    
    

    1. Reconnect the J46 engine stop and start ECU connector.

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

       Standard Voltage
       Tester Connection Condition Specified Condition J50-17 (+B1) - Body ground Always 9.5 to 14 V J50-16 (ACC1) - Body ground Engine switch on (ACC) 9.5 to 14 V J56-12 (B) - Body ground Always 9.5 to 14 V J56-24 (ACC) - Body ground Engine switch on (ACC) 9.5 to 14 V

       Result
       Proceed to OK NG

    
    

    OK

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

    NG

    GO TO STOP AND START SYSTEM Click here