Diagnosis Procedure

note

Perform self-diagnoses with M.U.T.-III SE before performing symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.
Check that refrigerant is enclosed in cooler cycle normally. If refrigerant amount is shortage from proper amount, perform the inspection of refrigerant leakage.

1.CHECK MAGNETIC CLUTCH OPERATION

Check magnetic clutch. Refer to Component Function Check

Does it operate normally?

Repair or replace malfunctioning parts.

2.CHECK REFRIGERANT PRESSURE SENSOR

Check refrigerant pressure sensor. Refer to Diagnosis ProcedureDTC Diagnosis Procedure

Is the inspection result normal?

Repair or replace malfunctioning parts.

3.CHECK A/C AMP. OUTPUT SIGNAL

With M.U.T.-III SE

Select “Data List” mode of “HVAC” using M.U.T.-III SE.
Select “COMP REQ SIG” and “FAN REQ SIG”, and check status under the following conditions.

Is the inspection result normal?

Replace IPDM E/R. Refer to Removal and Installation