Magnetic Clutch

MAGNET CLUTCH

Description

Magnet clutch drives a compressor, by a signal of IPDM E/R.


Component Function Check


1. CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.Press AUTO switch.
2.Display should indicate AUTO. Confirm that the magnet clutch engages (sound or visual inspection). (Discharge air and fan speed depend on ambient, in-vehicle and set temperatures.)
Does the magnet clutch operate?
YES- INSPECTION END
NO- Go to Diagnosis Procedure. Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function. Refer to "WITHOUT PLASMACLUSTER SYSTEM : Diagnosis Description" Without Plasmacluster System (without Plasmacluster system) or {LINK_TO:0000000008293213}, "WITH PLASMACLUSTER SYSTEM : Diagnosis
Description" (with plasmacluster system).
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. PERFORM IPDM E/R AUTO ACTIVE TEST

Perform IPDM E/R auto active test. Refer to "Diagnosis Description" Diagnosis Description.
Does the magnet clutch operate?
YES-1-WITH CONSULT: GO TO 6.
YES-2-WITHOUT CONSULT: GO TO 5.
NO- Check 10A fuse (No. 49, located in IPDM E/R), and GO TO 3.

3. CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R connector and compressor connector.
3.Check continuity between IPDM E/R harness connector and compressor harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK MAGNET CLUTCH CIRCUIT

Check for operation sound when applying battery voltage direct current to terminal.
Is the inspection result normal?
YES- Replace IPDM E/R.
NO- Replace magnet clutch. Refer to "MAGNET CLUTCH : Removal and Installation of Compressor Clutch" Service and Repair.

5. CHECK REFRIGERANT PRESSURE SENSOR (WITHOUT CONSULT)

1.Start the engine.
2.Check voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- Repair harness or connector.
NO- Refer to "Diagnosis Procedure" Refrigerant Pressure Sensor (VQ37VHR) or "Diagnosis Procedure"
(VQ25HR).

6. CHECK ECM INPUT SIGNAL-1

Check A/C switch signal in "Data monitor".





Is the inspection result normal?
YES- GO TO 9.
NO- GO TO 7.

7. CHECK REFRIGERANT PRESSURE SENSOR (WITH CONSULT)

1.Start the engine.
2.Check voltage of refrigerant pressure sensor in "Data monitor".
Is the inspection result normal?
YES- GO TO 8.
NO- Refer to "Diagnosis Procedure" Refrigerant Pressure Sensor (VQ37VHR) or "Diagnosis Procedure"
(VQ25HR).

8. CHECK ECM INPUT SIGNAL-2

Check blower fan motor switch signal in "Data monitor".





Is the inspection result normal?
YES- GO TO 9.
NO- Repair harness or connector.

9. CHECK CAN COMMUNICATION

Check CAN communication. Refer to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
- ECM - IPDM E/R
- ECM - Unified meter and A/C amp.
Is the inspection result normal?
YES- Replace ECM.
NO- Repair or replace malfunctioning part.