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 and/or duct. Airflow mode does not change. |
| POSSIBLE CAUSE | Malfunction in airflow mode actuator Malfunction in VENT mode system Malfunction in HEAT mode system Malfunction in DEFROSTER mode system |
POSSIBLE CAUSES DESCRIPTION (INSUFFICIENT AIR BLOWN FROM VENTS)
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 |
POSSIBLE CAUSES DESCRIPTION (AMOUNT OF AIR BLOWN FROM VENTS NOT CHANGE)
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 |
POSSIBLE CAUSES DESCRIPTION (AIR INTAKE MODE NOT CHANGE)
- 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 NO 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 intake system |
| POSSIBLE CAUSE | A/C unit air intake link, air intake crank, air intake rod, air intake wire, wire clamp malfunction Climate control unit rack-and-pinion, air intake wire malfunction A/C unit air intake door malfunction Heater piping malfunction |
POSSIBLE CAUSES DESCRIPTION (NO TEMPERATURE CONTROL WITH CLIMATE CONTROL UNIT)
NO. 6 WINDSHIELD FOGGED
- 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.
| 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 |
POSSIBLE CAUSES DESCRIPTION (WINDSHIELD FOGGED)
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 |
POSSIBLE CAUSES DESCRIPTION (AIR FROM VENTS NOT COLD ENOUGH)
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 PCM (A/C signal) Malfunction in PCM (IG1 signal) Malfunction in A/C compressor Malfunction in A/C relay Malfunction in evaporator temperature sensor Malfunction in BCM unit Malfunction in CAN communication |
POSSIBLE CAUSES DESCRIPTION (NO COOL AIR)
- 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, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.