Diagnosis Procedure
Symptom: Compressor does not operate.
- Perform self-diagnoses with CONSULT before performing symptom diagnosis. If DTC is detected, perform the corresponding diagnosis.
- Check that refrigerant system is properly charged. If refrigerant amount is below the proper amount, perform inspection of refrigerant leakage.
- CHECK MAGNET CLUTCH OPERATION
Check magnet clutch. Refer to Component Function Check .
Does it operate normally?
YES
GO TO STEP 2 .
NO
Repair or replace malfunctioning parts.
- CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to Component Function Check .
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair or replace malfunctioning parts.
- CHECK A/C AUTO AMP. OUTPUT SIGNAL
CONSULT
- Select "Data Monitor" mode of "HVAC".
- Select "COMP REQ SIG" and "FAN REQ SIG".
- Check that the function operates normally according to the following conditions:
Monitor item
Condition
Status
COMP REQ SIG
A/C switch
ON
On
OFF
Off
FAN REQ SIG
Blower motor
ON
On
OFF
Off
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Replace A/C auto amp. Refer to Removal and Installation .
- CHECK ECM INPUT SIGNAL
- Select "Data Monitor" mode of "ECM".
- Select "AIR COND SIG" and "HEATER FAN SW".
- Check that the function operates normally according to the following conditions:
Monitor item
Condition
Status
AIR COND SIG
A/C switch
ON
On
OFF
Off
HEATER FAN SW
Blower motor
ON
On
OFF
Off
Is the inspection result normal?
YES
GO TO STEP 5 .
NO
Check CAN communication system. Refer to Trouble Diagnosis Flow Chart .
- CHECK IPDM E/R INPUT SIGNAL
- Start engine.
- Select "Data Monitor" mode of "IPDM E/R".
- Select "AC COMP REQ".
- Check that the function operates normally according to the following conditions:
Monitor item
Condition
Status
AC COMP REQ
A/C switch
ON
On
OFF
Off
Is the inspection result normal?
YES
Inspection End.
NO
Check CAN communication system. Refer to Trouble Diagnosis Flow Chart .