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 STEP-2
Perform self-diagnosis STEP-2. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos. 1 to 2.
Is there any malfunction displayed?
YES - Go to appropriate malfunctioning sensor circuit. Refer to Diagnosis Description, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see to No. 11.
NO - GO TO 2.
2.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), 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.
Does the magnet clutch operate?
YES - � WITH CONSULT-III: GO TO 6.
- 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, "WITHOUT LEFT AND RIGHT VENTILATION
Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system) and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
NO - 1. Replace compressor.
2. Refer to self-diagnosis procedure Diagnosis Description, "WITHOUT LEFT AND RIGHT VENTILATION
Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system) 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-III Function, "WITHOUT LEFT AND RIGHT VENTILATION
CONSULT-III Function (With left and right ventilation temperature separately control system).

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". Refer to 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 - Refer to Diagnosis Procedure.
8.CHECK ECM INPUT SIGNAL-2
Check blower fan motor switch signal in "Data monitor". Refer to CONSULT-III Function, "WITHOUT LEFT AND RIGHT
CONSULT-III Function, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : CONSULT-III Function" (With left and right temperature separately control system).

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.
- 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).