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 FRONT VENTS
| 1 | Insufficient air (or no air) blown from front vents |
|---|---|
| DESCRIPTION | Problem with each vent and/or duct Front airflow mode does not change when switching front mode switch. |
| POSSIBLE CAUSE | Malfunction in front airflow mode actuator Malfunction in front VENT mode system Malfunction in front HEAT mode system Malfunction in front DEFROSTER mode system |
INSPECTION CHART
NO. 2 AMOUNT OF AIR BLOWN FROM FRONT VENTS DOES NOT CHANGE
| 2 | Amount of air blown from front vents does not change. |
|---|---|
| DESCRIPTION | Malfunction in front blower system Amount of air blown front vents does not change when switching front climate control unit airflow control dial. |
| POSSIBLE CAUSE | Front A/C unit malfunction Front blower motor malfunction Malfunction in front power MOS FET system Front climate control unit malfunction |
INSPECTION CHART
- 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. 3 AIR INTAKE MODE FROM FRONT VENT DOES NOT CHANGE
| 3 | Air intake mode from front vent does not change. |
|---|---|
| DESCRIPTION | Malfunction in A/C unit and/or front climate control unit air intake mode switching system Air intake mode does not change when switching REC/FRESH mode. |
| POSSIBLE CAUSE | Air intake actuator malfunction Air intake door malfunction |
INSPECTION CHART
- 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. 4 NO TEMPERATURE CONTROL WITH FRONT CLIMATE CONTROL UNIT
| 4 | No temperature control with front climate control unit |
|---|---|
| DESCRIPTION | Malfunction in A/C unit and/or front climate control unit air mix system Temperature does not change when switching front climate control unit temperature setting dial. |
| 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 |
INSPECTION CHART
NO. 5 WINDSHIELD FOGGED
| 5 | Windshield fogged. |
|---|---|
| DESCRIPTION | Malfunction in A/C compressor control system and/or air intake mode switching system A/C compressor does not operate while airflow mode is 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 | Front climate control unit (B+ signal) system malfunction Air intake actuator malfunction Front climate control unit (RECIRCULATE, FRESH signal) system malfunction A/C unit air intake door malfunction |
INSPECTION CHART
- 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. 6 INSUFFICIENT AIR (OR NO AIR) BLOWN REAR VENTS
| 6 | Insufficient air (or no air) from rear vents |
|---|---|
| DESCRIPTION | Problem with each rear vent and/or duct Rear airflow mode does not change when front and/or rear climate control unit mode switches. |
| POSSIBLE CAUSE | Rear vent mode malfunction Rear heat mode malfunction Rear airflow mode actuator malfunction Open, short circuit in wiring or poor connection between front and rear climate control unit |
INSPECTION CHART
NO. 7 AMOUNT OF AIR FROM REAR VENTS DOES NOT CHANGE
| 7 | Amount of air from rear vents does not change |
|---|---|
| DESCRIPTION | Malfunction in rear blower motor system Amount of air blowing rear vents does not change when switching front and/or rear climate control unit airflow volume control dial. |
| POSSIBLE CAUSE | Rear A/C unit malfunction Rear blower motor malfunction Rear power MOS FET malfunction Rear climate control unit malfunction |
INSPECTION CHART
- 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. 8 AIR FROM FRONT/REAR VENTS NOT COLD ENOUGH
| 8 | Air from front/rear vents not cold enough |
|---|---|
| DESCRIPTION | Magnetic clutch operates but A/C system malfunctions |
| POSSIBLE CAUSE | Drive belt malfunction Refrigerant pressure switch malfunction Malfunction in blower unit or condenser Cooling fan system malfunction Condenser or related part malfunction A/C unit or condenser malfunction Receiver/drier or expansion valve malfunction (valve closes too mach) 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 Evaporative temperature sensor malfunction |
INSPECTION CHART
NO. 9 NO COOL AIR FROM FRONT/REAR VENTS
| 9 | No cool air from front/rear vents |
|---|---|
| DESCRIPTION | Malfunction in A/C compressor control system Magnetic clutch does not operate when the A/C system is turned ON. |
| 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 |
INSPECTION CHART
- 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.
NO. 11 DUAL A/C CONTROL DOES NOT OPERATE
| 11 | Dual A/C control function does not operate |
|---|---|
| DESCRIPTION | Driver or passenger-side temperature control does not operate individually |
| POSSIBLE CAUSE | Driver-side air mix door malfunction (stuck) Passenger-side air mix door malfunction (stuck) driver-side front air mix actuator malfunction Passenger-side front air mix actuator malfunction Driver-side front air mix actuator position sensor malfunction Passenger-side front air mix actuator position sensor malfunction Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator position sensor Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator position sensor Front climate control unit malfunction |
INSPECTION CHART