[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 22: Poor A/C Performance | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 22: Poor A/C Performance
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by short /overcharged A/C refrigerant, failed A/C control system, failed fan control system or other faults.
PROBABLE CAUSE Short or overcharged A/C refrigerant Failed A/C compressor Failed fan controller Failed A/C-ECU Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. MUT-II/III diagnosis code Q: Diagnosis code set? YES: Inspection chart for diagnosis code (Refer to ). NO: Go to Step 2 .
| STEP 2. A/C compressor magnet clutch operation check. Engine: Idling A/C set temperature: Maximum Cool when temperature in cabin is 25°C or more Maximum Hot when temperature in cabin is 25°C or less OK: Magnet clutch active (when A/C is ON) Magnet clutch inactive (when A/C is OFF) Q: Is the check result normal? YES: Go to Step 5 . NO: Go to Step 3 .
| STEP 3. MUT-II/III data list Item 28: A/C switch Engine: Idling A/C set temperature: Maximum Cool when temperature in cabin is 25°C or more Maximum Hot when temperature in cabin is 25°C or less OK: ON (when A/C is ON) OFF (when A/C is OFF) Q: Is the check result normal? YES: Go to Step 4 . NO: Check A/C switch (Refer to Inspection Procedure 26 ).
| STEP 4. MUT-II/III data list Item 49: A/C relay Engine: Idling A/C set temperature: Maximum Hot when temperature in cabin is 25°C or less Maximum Cool when temperature in cabin is 25°C or more OK: ON (when A/C is ON) OFF (when A/C is OFF) Q: Is the check result normal? YES: Check A/C system (Refer to GROUP 55A - Troubleshooting ). NO: Check A/C compressor relay (Refer to Inspection procedure 27 ).
| STEP 5. Check charged amount of A/C refrigerant. Check charged amount of A/C refrigerant (Refer to GROUP 55A - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 6 . NO: Adjust charged amount of A/C refrigerant.
| STEP 6. MUT-II/III actuator test Item 21: Fan controller OK: Fan motor rotates. Q: Is the check result normal? YES: Check A/C load signal system (Refer to Inspection Procedure 28 ). NO: Check fan control relay system (Refer to Inspection Procedure 25 ).

[13A] MULTIPORT FUEL INJECTION (MPI) <4G63> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 22: Poor A/C Performance | PRINT PAGE / INDEX / PRIOR / NEXT

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