GENERAL DESCRIPTION
The heater system uses a two-way-flow full-air-mix system that features high performance and low operating noise. It includes an independent face air blowing function. In addition, an air purifier has been included.
| Items | Specifications | |
|---|---|---|
| Heater unit | Type | Two-way-flow full-air-mix system |
| Heater control assembly | Dial type | |
| Compressor | Model | Scroll type |
| Dual pressure switch kPa (psi) | High-pressure switch | ON to OFF: 2,942 (426.7), OFF to ON: 2,354 (341.4) |
| Low-pressure switch | ON to OFF: 196 (28.4), OFF to ON: 221 (32.1) | |
| Refrigerant and quantity g (oz) | R-134a (HFC-134a), Approximately 480 - 520 (16.93 - 18.34) | |
General Specifications Chart
INTRODUCTION TO HEATER, AIR CONDITIONING AND VENTILATION DIAGNOSIS
With this system, after the outside air or inside air is taken in through the damper, it is fed to the evaporator by the blower fan and motor and cooled. The air cooled by the air mix damper is mixed appropriately with the warmed air to achieve a comfortable temperature. If the A/C does not operate or the cooled air is not discharged, the machine components or relay may be faulty.
TECHNICAL DESCRIPTION (COMMENT)
The blower system or the compressor system may be defective if there is no cool air coming from the spit hole.
If the inside/outside air changeover damper motor does not operate normally, the inside/outside air changeover damper motor system may be defective.
CIRCUIT OPERATION
The inside/outside air changeover damper motor is energized through the ignition switch (IG2). The motor is controlled by the A/C-ECU.
TECHNICAL DESCRIPTION
If the inside/outside air changeover damper motor does not operate normally, the inside/outside air changeover damper motor system may be defective.
If cool air is not distributed when the A/C switch is on, the air thermo sensor or the A/C compressor relay system may be defective.
If the blower fan and motor does not turn when the blower switch is operated, the blower switch may be defective.
If the blower air amount can not be changed when the blower switch is operated, the blower switch may be defective.
If the defogger does not operate when the defogger switch is turned on, the defogger relay system may be defective.
Turn ON the defogger switch. If the defogger does not shut off after roughly 11 minutes then the defogger timer is malfunctioning.
The A/C-ECU power system may be defective if the air conditioner, defogger, and outside/inside air changeover damper motor all do not operate normally.
IDLE-UP OPERATION CHECK
- Before inspection and adjustment, set vehicle in the following condition: Engine coolant temperature: 80 - 90 °C (176.0 - 194.0 °F) Lights, electric cooling fan and accessories: Set to OFF Transmission: Neutral ("N" or "P" for vehicles with A/T) Steering wheel: Straightforward
- Check whether or not the idle speed is the standard value. Refer to «IDLE SPEED & IGNITION TIMING»(ref-157284-S13548038032003081200000) . Standard value: 700 +/- 100 r/min
- When the A/C is running after turning the A/C switch to ON, and the blower switch to the 3(MH) or 4(HI) position, check to be sure that the idle speed is at the standard value. Standard value: 850 +/- 100 r/min NOTE: The engine control module < M/T>/the powertrain control module < A/T> determines whether the A/C load is low or high according to the output signal from the automatic compressor controller. NOTE: It is not necessary to make an adjustment, because the idling speed is automatically adjusted by the ISC system. If, however, a deviation from the standard value occurs for some reason, check the ISC system. NOTE: Check 4 minutes after idling begins.
Scheme 222
Scheme 223
- Set the heater control assembly's blow vent changeover knob to the DEF position.
- Set the heater unit's blow vent changeover damper lever to the DEF position (turn the damper relay to the left until it stops) and install the cable.
- Set the mold locator to the heater unit case and secure with a clip.
Scheme 224
- Turn the heater control assembly's temperature adjustment knob all the way to the HOT side.
- Set the heater unit's air mix door lever to the MAX HOT position (turn the damper lever as the left illustration) and attach the cable.
- Set the mold locator to the heater unit case and secure with a clip.
Scheme 225
Scheme 226
Scheme 227
COMPRESSOR MAGNETIC CLUTCH OPERATION CHECK
Connect the compressor connector terminal to the battery positive (+) terminal and ground the battery's negative (-) terminal to the compressor unit. At that time, the magnetic clutch should make a definite operating sound.
