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 - END.
NO - Go to Diagnosis Procedure. SEE Diagnosis Procedure.




Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Diagnosis Description Unified Meter & A/C Amp., see Nos. 1 to 2.
Is there any malfunction displayed?
YES - Go to appropriate malfunctioning sensor circuit. Diagnosis Description Unified Meter & A/C Amp., see to No. 11.
NO - GO TO 2.
2.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Diagnosis Description Unified Meter & A/C Amp., see Nos. 1 to 5.
Is it operated normally?
YES - END.
NO - GO TO 3.
3.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 6.
YES-2 - WITHOUT CONSULT-III: GO TO 7.
NO - Check 10A fuse (No. 49, located in IPDM E/R), and GO TO 4.
4.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 5.
NO - Repair harness or connector.
5.CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct current to terminal.
Is the inspection result normal?
YES - 1. Replace IPDM E/R.
2. Refer to self-diagnosis procedure Diagnosis Description Unified Meter & A/C Amp. and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
NO - 1. Replace magnet clutch. Service and Repair.
2. Refer to self-diagnosis procedure Diagnosis Description Unified Meter & A/C Amp. and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
6.CHECK ECM INPUT SIGNAL-1
Check A/C switch signal in "Data monitor". Consult-III Function(Unified Meter & A/C Amp.).

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

Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 7.
7.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check voltage of refrigerant pressure sensor in "Data monitor". Pinout Values and Diagnostic Parameters.
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 8.
- WITHOUT CONSULT-III: Repair harness or connector.
NO - Testing and Inspection.
8.CHECK ECM INPUT SIGNAL-2
Check blower fan motor switch signal in "Data monitor". Consult-III Function(Unified Meter & A/C Amp.).

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

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