AIR CONDITIONING SYSTEM Air Conditioning Control Panel Circuit

DTC Code DTC Name
Air Conditioning Control Panel Circuit

DESCRIPTION

w/ Navigation System:

This circuit consists of the display and navigation module display and air conditioning amplifier assembly. When the display and navigation module display is operated, signals are transmitted to the air conditioning amplifier assembly through the CAN communication system.

If the CAN communication system malfunctions, the air conditioning amplifier assembly does not operate when the display and navigation module display is operated.

w/o Navigation System:

This circuit consists of the air conditioning control assembly, accessory meter assembly and air conditioning amplifier assembly. When the air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system.

If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate when the air conditioning control assembly is operated.

WIRING DIAGRAM

E205397E01
E205396E02

CAUTION / NOTICE / HINT

Note:

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

  • Before performing the inspection, check that there are no problems related to the CAN communication system. (w/ Navigation System)

PROCEDURE

  1. CHECK VEHICLE TYPE

    1. Check vehicle type.

    Result

    Result

    Proceed to

    w/ Navigation system

    A

    w/o Navigation system

    B
    B

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

    A

  2. CHECK HARNESS AND CONNECTOR (SPLAY AND NAVIGATION MODULE DISPLAY - BATTERY AND BODY GROUND)

    1. E205398C01

      *a

      Front view of wire harness connector

      (to Display and Navigation Module Display)

      Disconnect the H4 display connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H4-1 (+B1) - H4-10 (GND1)

      Always

      11 to 14 V

      H4-3 (IG) - H4-10 (GND1)

      Engine switch off

      Below 1 V

      H4-3 (IG) - H4-10 (GND1)

      Engine switch on (IG)

      11 to 14 V

      H4-2 (ACC) - H4-10 (GND1)

      Engine switch on (ACC)

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H4-10 (GND1) - Body ground

      Always

      Below 1 Ω

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY

    1. Replace the display and navigation module display with a new or normally functioning one

      Click here

    2. Operate the display and navigation module display to check that it functions properly.

      OK

      Display and navigation module display operates normally.

    Result

    Result

    OK

    NG
    OK

    END (DISPLAY AND NAVIGATION MODULE DISPLAY IS FAULTY)

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

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

    1. Disconnect the G13 amplifier connector.

    2. Disconnect the H32 control connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

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

      Always

      Below 1 Ω

      H32-10 (LIN1) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)

    1. E204872C02

      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Disconnect the H32 control connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H32-1 (IG+) - H32-11 (GND)

      Engine switch off

      Below 1 V

      H32-1 (IG+) - H32-11 (GND)

      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

      H32-11 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - ACCESSORY METER)

    1. Disconnect the H32 control connector.

    2. Disconnect the H26 meter connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H32-5 (SWA) - H26-4 (SW1)

      Always

      Below 1 Ω

      H32-12 (E) - H26-7 (E)

      Always

      Below 1 Ω

      H32-4 (SWB) - H26-5 (SW2)

      Always

      Below 1 Ω

      H32-13 (SWC) - H26-6 (SW3)

      Always

      Below 1 Ω

      H32-5 (SWA) - Body ground

      Always

      10 kΩ or higher

      H32-12 (E) - Body ground

      Always

      10 kΩ or higher

      H32-4 (SWB) - Body ground

      Always

      10 kΩ or higher

      H32-13 (SWC) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE HEATER CONTROL SWITCH BOARD

    1. Replace the heater control switch board with a new or normally functioning one

      Click here

    2. Operate the air conditioning control assembly to check that it functions properly.

      OK

      Air conditioning control assembly operates normally.

    Result

    Result

    OK

    NG
    OK

    END (HEATER CONTROL SWITCH BOARD IS FAULTY)

    NG

  8. REPLACE ACCESSORY METER ASSEMBLY

    1. Replace the accessory meter assembly with a new or normally functioning one

      Click here

    2. Operate the accessory meter assembly to check that it functions properly.

      OK

      Accessory meter assembly operates normally.

    Result

    Result

    OK

    NG
    OK

    END (ACCESSORY METER ASSEMBLY IS FAULTY)

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here