FOREWORD
- The areas for inspection (steps) are given according to various circuit malfunctions. Use the following chart to verify the symptoms of the trouble in order to diagnose the appropriate area.
NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS
| 1 | Insufficient air (or no air) blown from vents |
|---|---|
| DESCRIPTION | Problem with each vent or duct or both. Airflow mode dose not change. |
| POSSIBLE CAUSE | Malfunction in airflow mode actuator Malfunction in VENT mode system Malfunction in HEAT mode system Malfunction in DEFROSTER mode system |
DESCRIPTION AND POSSIBLE CAUSE
Full-auto Air Conditioner
| 2 | Amount of air blown from vents does not change. |
|---|---|
| DESCRIPTION | Malfunction in blower system |
| POSSIBLE CAUSE | A/C unit malfunction Blower motor malfunction Malfunction in power MOS FET system Climate control unit malfunction |
DESCRIPTION AND POSSIBLE CAUSE
- When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.
Manual Air Conditioner
| 3 | Amount of air blown from vents does not change. |
|---|---|
| DESCRIPTION | Malfunction in blower system |
| POSSIBLE CAUSE | Blower relay, blower motor, resistor, fan switch malfunction A/C unit malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.4 AIR INTAKE MODE DOES NOT CHANGE
| 4 | Air intake mode does not change. |
|---|---|
| DESCRIPTION | Air intake mode does not change when switching REC/FRESH mode. |
| POSSIBLE CAUSE | Air intake actuator malfunction Air intake door malfunction |
DESCRIPTION AND POSSIBLE CAUSE
- When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.
NO.5 TEMPERATURE CONTROL WITH CLIMATE CONTROL UNIT
| 5 | No temperature control with climate control unit |
|---|---|
| DESCRIPTION | Malfunction in A/C unit and/or climate control unit air mix system |
| POSSIBLE CAUSE | A/C unit air mix link, air mix crank, air mix rod, air mix wire, wire clamp malfunction Climate control unit rack-and-pinion, air mix wire malfunction A/C unit air mix door malfunction Heater piping malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.6 WINDSHIELD FOGGED
| 6 | Windshield fogged. |
|---|---|
| DESCRIPTION | A/C compressor does not operate while airflow mode is in DEFROSTER or HEAT/DEF modes. Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or HEAT/DEF modes. |
| POSSIBLE CAUSE | Climate control unit (B+ signal) system malfunction Air intake actuator malfunction Climate control unit (RECIRCULATE, FRESH signal) system malfunction A/C unit air intake door malfunction |
DESCRIPTION AND POSSIBLE CAUSE
- When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect to make sure connectors, terminals and wiring harness are connected correctly and undamaged.
NO.7 AIR FROM VENTS NOT COLD ENOUGH
| 7 | Air from vents not cold enough. |
|---|---|
| DESCRIPTION | Magnetic clutch operates but A/C system malfunctions. |
| POSSIBLE CAUSE | Drive belt malfunction A/C unit or condenser malfunction Receiver/drier or expansion valve malfunction (valve closes too much) Malfunction in refrigerant lines A/C compressor system malfunction, insufficient compressor oil Over filling of compressor oil, malfunction in expansion valve or A/C unit air mix link system |
DESCRIPTION AND POSSIBLE CAUSE
NO.8 NO COOL AIR
| 8 | No cool air |
|---|---|
| DESCRIPTION | Magnetic clutch does not operate. |
| POSSIBLE CAUSE | Malfunction in PCM A/C cut control system Malfunction in climate control unit Malfunction in refrigerant pressure switch Malfunction in magnetic clutch Malfunction in PCM (IG1 signal) Malfunction in A/C compressor Malfunction in A/C relay Malfunction in evaporator temperature sensor |
DESCRIPTION AND POSSIBLE CAUSE