Automatic Air Conditioning
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.Turn fan control dial to AUTO position.
2.Press A/C switch.
3.A/C switch indicator turns ON. 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. Refer to "Diagnosis Procedure" .
Diagnosis Procedure
1. PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see Nos. 1 to 3.
Is there any malfunction displayed?
YES- Go to appropriate malfunctioning sensor circuit. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see to
No. 7.
NO- GO TO 2.
2. PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see Nos. 1 to 6.
Is it operated normally?
YES- INSPECTION 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 7.
YES-2-WITHOUT CONSULT: GO TO 8.
NO- Check 10A fuse (No. 51, 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 (magnet clutch) connector.
3.Check continuity between IPDM E/R harness connector and compressor (magnet clutch) harness connector.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair harness or connector.
5. CHECK CIRCUIT CONTINUITY BETWEEN COMPRESSOR GROUND
Check continuity between compressor (magnet clutch) harness connector and ground.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair harness or connector.
6. 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" Reading and Clearing Diagnostic Trouble Codes and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
NO- 1.Replace compressor.
2.Refer to self-diagnosis procedure "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes and perform self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
7. CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal in "Data monitor" mode of "AIR CONDITIONER" of "BCM" using CONSULT. Refer to "AIR CONDITIONER : CONSULT Function (BCM AUTO AIR CONDITIONER)" CONSULT Function.
A/C SWITCH ON: AIR COND SW On
A/C SWITCH OFF: AIR COND SW Off
Is the inspection result normal?
YES- GO TO 11.
NO- GO TO 8.
8. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND AUTO AMP.
1.Turn ignition switch OFF.
2.Disconnect BCM harness connector and auto amp. harness connector.
3.Check continuity between BCM harness connector and auto amp. harness connector.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair harness or connector.
9. CHECK BCM
1.Connect BCM harness connector.
2.Turn ignition switch ON.
3.Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES- GO TO 10.
NO- Replace BCM. Refer to "Removal and Installation" Removal And Installation.
10. CHECK COMPRESSOR ON SIGNAL
1.Turn ignition switch OFF.
2.Connect auto amp. harness connector.
3.Turn ignition switch ON.
4.Check voltage between auto amp. harness connector and ground.
Is the inspection result normal?
YES- GO TO 11.
NO- Replace auto amp.
11. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT
1.Start the engine.
2.Check voltage of refrigerant pressure sensor in "Data monitor" mode of "ECM" using CONSULT. Refer to
"Reference Value" Except For Mexico (Except for Mexico), or "Reference Value" For Mexico (For Mexico).
WITHOUT CONSULT
1.Start the engine.
2.Check voltage between ECM harness connector and ground.
Is the inspection result normal?
YES-1-WITH CONSULT: GO TO 12.
YES-2-WITHOUT CONSULT: GO TO 13.
NO- Refer to "Diagnosis Procedure" Component Test (Except for Mexico), or "Diagnosis Procedure" For Mexico
(For Mexico).
12. CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal in "Data monitor" mode of "AIR CONDITIONER" of "BCM" using CONSULT. Refer to "AIR CONDITIONER : CONSULT Function (BCM AUTO AIR CONDITIONER)" CONSULT Function.
FAN CONTROL DIAL ON: FAN ON SIG On
FAN CONTROL DIAL OFF: FAN ON SIG Off
Is the inspection result normal?
YES- GO TO 16.
NO- GO TO 13.
13. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND AUTO AMP.
1.Turn ignition switch OFF.
2.Disconnect BCM connector and auto amp. connector.
3.Check continuity between BCM harness connector and auto amp. harness connector.
Is the inspection result normal?
YES- GO TO 14.
NO- Repair harness or connector.
14. CHECK BCM
1.Connect BCM harness connector.
2.Turn ignition switch ON.
3.Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES- GO TO 15.
NO- Replace BCM. Refer to "Removal and Installation" Removal And Installation.
15. CHECK FAN ON SIGNAL
1.Turn ignition switch OFF.
2.Connect auto amp. connector.
3.Turn ignition switch ON.
4.Check voltage between auto amp. harness connector and ground.
Is the inspection result normal?
YES- GO TO 16.
NO- Replace auto amp.
16. CHECK CAN COMMUNICATION
Check CAN communication. Refer to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
- ECM - IPDM E/R
- ECM - BCM
Is the inspection result normal?
YES- Replace ECM.
NO- Repair or replace malfunctioning part(s).