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. Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to "Diagnosis Description" Diagnosis Description, see Nos. 1 to 2.
Is there any malfunction displayed?
YES- Go to appropriate malfunctioning sensor circuit. Refer to "Diagnosis Description" Diagnosis Description, see to
No. 11.
NO- GO TO 2.

2. PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to "Diagnosis Description" Diagnosis Description, 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. Refer to "Diagnosis Description" Diagnosis Description.
Does the magnet clutch operate?
YES-1-WITH CONSULT: GO TO 6.
YES-2-WITHOUT CONSULT: 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" Diagnosis Description and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
NO- 1.Replace magnet clutch. Refer to "MAGNET CLUTCH : Removal and Installation of Compressor Clutch" Service and Repair.
2.Refer to self-diagnosis procedure "Diagnosis Description" Diagnosis Description 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". Refer to "CONSULT Function" CONSULT Function.
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
1.Start the engine.
2.Check voltage of refrigerant pressure sensor in "Data monitor". Refer to "Reference Value" Pinout Values and Diagnostic Parameters.
WITHOUT CONSULT
1.Start the engine.
2.Check voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- -WITH CONSULT: GO TO 8.
-WITHOUT CONSULT: Repair harness or connector.
NO- Refer to "Diagnosis Procedure" Refrigerant Pressure Sensor.

8. CHECK ECM INPUT SIGNAL-2

Check blower fan motor switch signal in "Data monitor". Refer to "CONSULT Function" CONSULT Function.
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. 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(s).