Diagnosis Procedure

MAGNET CLUTCH


Description

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




MAGNET CLUTCH


Diagnosis Procedure

1.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function. Refer to Diagnosis Description (WITHOUT
ACCS) or Diagnosis Description (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. Refer to Diagnosis Description.
Does the magnet clutch operate?
YES - � WITH CONSULT-III: GO TO 5.
- 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 - Replace compressor.
5.CHECK ECM INPUT SIGNAL-1
Check A/C switch signal in "Data monitor". Refer to CONSULT-III Function(WITHOUT ACCS) or CONSULT-III Function (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".
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 - Refer to Diagnosis Procedure (VQ35HR) or Diagnosis Procedure(VK50VE).
7.CHECK ECM INPUT SIGNAL-2
Check blower fan motor switch signal in "Data monitor". Refer to CONSULT-III Function, "WITHOUT ACCS : CONSULT-III
CONSULT-III Function (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. Refer to 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).