AIR CONDITIONING SYSTEM Air Conditioning Compressor Magnetic Clutch Circuit

DTC Code DTC Name
Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

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

WIRING DIAGRAM

E198320E17

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT MAGNET CLUTCH RELAY (A/C COMP)

    1. E145138

      Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - 5

      Battery voltage is not applied to terminals 1 and 2

      10 kΩ or higher

      Battery voltage is applied to terminals 1 and 2

      Below 1 Ω

    Result

    Result

    OK

    NG
    NG

    REPLACE MAGNET CLUTCH RELAY (A/C COMP)

    OK

  2. INSPECT COOLER COMPRESSOR ASSEMBLY

    1. E198321N03

      Remove the cooler compressor assembly

      Click here

    2. Disconnect the A magnet clutch connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 (MG+) - A-1

      Always

      Below 1 Ω

      3 (MG+) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    NG

    REPLACE COOLER COMPRESSOR ASSEMBLY

    Click here

    OK

  3. INSPECT MAGNETIC CLUTCH ASSEMBLY

    1. E198322N04

      Reconnect the A magnet clutch connector.

    2. Apply battery voltage to the magnet clutch assembly and check the operation of the magnet clutch assembly.

      OK

      Measurement Condition

      Specified Condition

      Battery positive (+) → Terminal 3 (MG+)

      Battery negative (-) → Body ground

      Magnet clutch assembly operating sound can be heard, and magnet clutch hub and rotor lock.

    Result

    Result

    OK

    NG
    NG

    REPLACE MAGNET CLUTCH ASSEMBLY

    Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)

    1. E200501C02

      *1

      A/C COMP Relay

      *a

      Component without relay installed

      (Engine Room No. 1 Relay Block, Junction Block)

      Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A/C COMP relay terminal 1 - Body ground

      Engine switch on (IG)

      11 to 14 V

      A/C COMP relay terminal 5 - Body ground

      Always

      11 to 14 V

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. E177002C01

      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the G13 amplifier connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G13-20 (MGC) - Body ground

      Engine switch off

      Below 1 V

      G13-20 (MGC) - Body ground

      Engine switch on (IG)

      11 to 14 V

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

    1. Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

    2. Disconnect the C32 compressor connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A/C COMP relay terminal 3 - C32-3 (MG+)

      Always

      Below 1 Ω

      C32-3 (MG+) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR