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 blower speed depend on ambient, in-vehicle and set temperatures.)
Does the magnet clutch operate?
YES - INSPECTION END
NO - Go to Diagnosis Procedure. SEE Diagnosis Procedure.




Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function. Diagnosis Description Unified Meter & A/C Amp Without ACCS (WITHOUT
ACCS) or Diagnosis Description With ACCS Unified Meter & A/C Amp (WITH ACCS).
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. Diagnosis Description.
Does the magnet clutch operate?
YES-1 - WITH CONSULT-III: GO TO 5.
YES-2 - WITHOUT CONSULT-III: GO TO 6.
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-1 - VQ35HR: Replace magnet clutch. .
NO-2 - VK50VE: Replace compressor. Removal and Replacement.
5.CHECK ECM INPUT SIGNAL-1
Check A/C switch signal in "Data monitor". Consult-III Function Unified Meter & A/C Amp Without ACCS(WITHOUT ACCS) or Consult-III Function With ACCS Unified Meter & A/C Amp (WITH ACCS).

A/C SWITCH ON : AIR COND SIG On
A/C SWITCH OFF : AIR COND SIG Off

Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 6.
6.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check voltage of refrigerant pressure sensor in "Data monitor". (VQ35HR) or (VK50VE).
WITHOUT CONSULT-III
1. Start the engine.
2. Check voltage between ECM harness connector and ground.






Is the inspection result normal?
YES - - WITH CONSULT-III: GO TO 7.
- WITHOUT CONSULT-III: Repair harness or connector.
NO - Testing and Inspection (VQ35HR) or Testing and Inspection(VK50VE).
7.CHECK ECM INPUT SIGNAL-2
Check blower fan motor switch signal in "Data monitor". Consult-III Function Unified Meter & A/C Amp Without ACCS (WITHOUT ACCS) or Consult-III Function With ACCS Unified Meter & A/C Amp (WITH ACCS).

FAN SWITCH ON : HEATER FAN SW On
FAN SWITCH OFF : HEATER FAN SW Off

Is the inspection result normal?
YES - GO TO 8.
NO - Repair harness or connector.
8.CHECK CAN COMMUNICATION
Check CAN communication. 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(s).