AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

When the No.3 heater control sub-assembly is turned on, a magnetic clutch on signal is sent from the AC terminal of the ECM. Then, the engine room relay block assembly turns on to operate the magnetic clutch assembly.

WIRING DIAGRAM

A004HZ2E02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Date List.

    5. Check the value(s) by referring to the table below.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/C SW Input

      A/C Switch Input

      OFF or ON

      ON: A/C switch on

      OFF: A/C switch off

      		 -
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      NG A
      OK B

    B

    READ VALUE USING GTS Click here

    A

  2. CHECK HARNESS AND CONNECTOR (NO. 3 HEATER CONTROL SUB-ASSEMBLY - POWER SOURCE)


    1. Disconnect the D21 No. 3 heater control sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D21-2(B) - Body ground

      • Ignition switch on

      • Blower switch: on

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NO. 3 HEATER CONTROL SUB-ASSEMBLY


    1. Remove the No. 3 heater control sub-assembly Click here.

    2. Inspect the No. 3 heater control sub-assembly Click here.


    NG

    REPLACE NO. 3 HEATER CONTROL SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 3 HEATER CONTROL SUB-ASSEMBLY - MAIN BODY ECU (NETWORK GATEWAY ECU))


    1. Disconnect the D6 main body ECU (network gateway ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D6-17 - D21-3(A/C) Always Below 1 Ω
      D6-17 - Body ground Always 10 kΩ or higher

    OK

    REPLACE NETWORK GATEWAY ECU

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. READ VALUE USING GTS


    1. Enter the following menus: Powertrain / Engine and ETC / Date List.

    2. Check the value(s) by referring to the table below.

      Engine
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/C Pressure Normal SW

      Pressure Switch status

      ON or OFF

      		 ON -
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      NG A
      OK B
      OK
      The display is as specified in the normal condition column.

    B

    READ VALUE USING GTS Click here

    A

  6. CHECK REFRIGERANT VOLUME


    1. Check the refrigerant volume (for HFC-134a(R134a)) Click here.

    2. Check the refrigerant volume (for HFO-1234yf(R1234yf)) Click here.


    NG

    CHARGE REFRIGERANT

    OK

  7. CHECK HARNESS AND CONNECTOR (AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY - POWER SOURCE)


    1. Disconnect the A7 air conditioner tube and accessory assembly connector.

    2. A004HRNE02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-4(B) - Body ground Ignition switch on 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-2(E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY - HEATER RELAY)


    1. Remove the heater relay from the engine room relay block assembly.

    2. A004JO4E01
      Text in Illustration
      *1

      Component without relay installed

      (Engine Room Relay Block Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-1(AC) - 2 Always Below 1 Ω
      A7-1(AC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY - ECM)


    1. Disconnect the A33 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-3(ACP) - A33-8(ACP) Always Below 1 Ω
      A7-3(ACP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY


    1. Inspect the air conditioner tube and accessory assembly Click here


    OK

    REPLACE ECM

    NG

    REPLACE AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY

  12. READ VALUE USING GTS


    1. Enter the following menus: Powertrain / Engine and ETC / Date List.

    2. Check the value(s) by referring to the table below.

      Engine
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/C Signal

      A/C Signal /

      OFF or ON

      		 A/C switch operated: ON (when switch is pressed) -
      A/C switch not operated: OFF (when switch is not pressed)
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      NG A
      OK B
      OK
      The display is as specified in the normal condition column.

    B

    CHECK HARNESS AND CONNECTOR (HEATER RELAY - COMPRESSOR WITH MAGNET CLUTCH) Click here

    A

  13. INSPECT HEATER RELAY


    1. Remove the heater relay from the engine room relay block assembly.

    2. Inspect the heater relay Click here.


    NG

    REPLACE HEATER RELAY

    OK

  14. CHECK HARNESS AND CONNECTOR (HEATER RELAY - POWER SOURCE)


    1. A004JO4E01
      Text in Illustration
      *1

      Component without relay installed

      (Engine Room Relay Block Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      5 - Body ground Ignition switch off Below 1 V
      Ignition switch on 11 to 14V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK HARNESS AND CONNECTOR (HEATER RELAY - COMPRESSOR WITH MAGNET CLUTCH)


    1. Disconnect the C17 compressor with magnet clutch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C17-1(MG+) - 3 Always Below 1 Ω
      C17-1(MG+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. INSPECT COMPRESSOR WITH MAGNET CLUTCH


    1. Inspect the compressor with magnet clutch Click here.


    NG

    REPLACE COMPRESSOR WITH MAGNET CLUTCH Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (HEATER RELAY - AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY)


    1. Disconnect the A7 air conditioner tube and accessory assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 - A7-1(AC) Always Below 1 Ω
      2 - Body ground Always 10kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK HARNESS AND CONNECTOR (HEATER RELAY - ECM)


    1. A004JO4E01
      Text in Illustration
      *1

      Component without relay installed

      (Engine Room Relay Block Assembly)

      Disconnect the A35 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - A35-35(AC) Always Below 1 Ω
      1 - Body ground Always 10kΩ or higher

    OK

    REPLACE ECM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR