AIR CONDITIONING SYSTEM Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

When the air conditioning amplifier assembly is turned on, a magnet clutch ON signal is sent from the MGC terminal of the air conditioning amplifier assembly. Then, the MGC relay turns on to operate the magnet clutch assembly.

WIRING DIAGRAM

B006O0ZE01

CAUTION / NOTICE / HINT

Note


  • ECM malfunctions can affect the storage of this DTC. Therefore, check all SFI system DTCs and confirm that the system is normal before performing the following inspection.

    Click here

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

  • When the battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

    Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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


      OK
      CAN communication system DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO CAN COMMUNICATION SYSTEM for LHD: Click here for RHD: Click here

    OK

  2. INSPECT MGC RELAY


    1. Remove the MGC relay from the No. 2 engine room relay block.

    2. Inspect the MGC relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MGC RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY)


    1. B006PXGC30
      *a

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the air conditioning amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G36-20 (MGC) - Body ground Engine switch on (IG) 11 to 14 V
      G36-20 (MGC) - Body ground Engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. B006N4UC17
      *a

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

      Remove the air conditioning amplifier assembly with its connectors still connected.


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G36-20 (MGC) - Body ground

      • Engine idling

      • "A/C" switch off → on

      • Blower switch: LO

      • Magnet clutch assembly: off → on

      		 11 to 14 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT MAGNET CLUTCH ASSEMBLY


    1. Remove the magnet clutch assembly.

      Click here

    2. Inspect the magnet clutch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here

    NG

    REPLACE MAGNET CLUTCH ASSEMBLY Click here