A/C SYSTEM SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compressor Type | Nippondenso Or Seiko-Seiki | |
| System Oil Capacity | (1) 3.4-4.8 ozs. | |
| Refrigerant (R-134a) Capacity | 34.4-36 ozs. | |
| System Operating Pressures (2) | ||
| High Side | 164-215 psi (11.5-15.1 kg/cm 2 ) | |
| Low Side | 36-42 psi (2.5-3.0 kg/cm 2 ) | |
| (1) Use PAG Oil (Part No. 81-22-9-407-724). (2) Specification is with ambient temperature at 80°F (27°C) and relative humidity at 50-70 percent. | ||
| (1) | Use PAG Oil (Part No. 81-22-9-407-724). |
| (2) | Specification is with ambient temperature at 80°F (27°C) and relative humidity at 50-70 percent. |
A/C SYSTEM SPECIFICATIONS
Blower Control Knob
Blower speed can be placed in 5 different levels from off (0) to high speed setting (4). The airflow to vent outlets is dependent on driving speed. (Scheme 1)
Temperature Control Knob
This knob, in center of control panel, allows the increase or decrease of temperature in passenger compartment. (Scheme 1)
Air Distribution Knob
Airflow can be directed to windshield, upper body area, or to footwells. Intermediate positions are also possible. In the footwell position, a small amount of air flows to the windows to keep them from fogging up. (Scheme 1)
Scheme 1
PIN VOLTAGE CHARTS
Pin voltage charts are supplied to reduce diagnostic time. Checking pin voltages at the A/C-heater control unit determines whether it is receiving and transmitting proper voltage signals. Charts may also help determine if A/C-heater control unit wiring harness has a short or open circuit.
Note. All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.
| Pin No. | Function/Description | Signal Type |
|---|---|---|
| 2 | Ground | Ground Circuit |
| 3 | A/C Switch Signal | Input Signal |
| 5 | A/C Compressor | Output Signal |
| 6 | Evaporative Temperature | Input Signal |
| (1) Pin assignments not listed are not used. | ||
| (1) | Pin assignments not listed are not used. |
A/C-HEATER CONTROL UNIT PIN ASSIGNMENTS (BLACK 6-PIN CONNECTOR) (1)
| Pin No. | Function/Description | Signal Type |
|---|---|---|
| 1 | Ignition Feed (Terminal 15) | Input Signal |
| 2 | A/C Compressor Clutch | Output Signal |
| 3 | Blower Level (A/C) | Output Signal |
| 4 | Ignition Feed (Terminal 15) | Input Signal |
| 5 | Blower Level (Air Circulation) | Output Signal |
| 6 | Function Light Ground | Ground Circuit |
| 7 | Ignition Feed (Terminal 15) | Input Signal |
| 8 | Fresh Air Recirculation | Output Signal |
A/C-HEATER CONTROL UNIT PIN ASSIGNMENTS (BLACK 8-PIN CONNECTOR)
REMOVAL & INSTALLATION
| WARNING | To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures. See SERVICE PRECAUTIONS . |
Removal & Installation (Z3)
Remove radio. Pull off A/C-heater control panel knobs. (Scheme 2) Remove screws and pry off front panel. Disconnect control cables and electrical connector. To install, reverse removal procedure.
Scheme 2
Scheme 3
Remove windshield wiper assembly. Unclip 3 fan covers at firewall. Disconnect fan electrical connectors. Unclip fan retaining bracket. Lift out blower motor. (Scheme 4) To install, reverse removal procedure.
Scheme 4
- Disconnect negative battery cable. Discharge A/C system, using approved refrigerant recovery/recycling equipment. Disconnect A/C hoses for evaporator core in engine compartment.
- Remove lower instrument panel covers. Disconnect A/C pipes from firewall to evaporator core by removing the A/C pipe holder screws and sliding pipes upward with pressure plate. (Scheme 5)
- Remove evaporator cover from evaporator case. Remove evaporator by sliding sideways off of case. Remove expansion valve from evaporator core. Drain refrigerant oil from evaporator and measure amount.
- To install, reverse removal procedure. Replace oil in evaporator with the same amount that was drained. Replace all "O" rings and coat them with refrigerant oil before installation. Evacuate, charge, and leak test A/C system.
Scheme 5
Disconnect heater hose clips. Remove heater hoses. Blow out coolant from heater core with compressed air. Remove lower left instrument panel trim. Remove knee bolster. (Scheme 6) Disconnect heater hoses from heater core. Remove footwell air duct. Remove heater core screws. Slide out heater core. To install, reverse removal procedure.
Scheme 6
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| A/C Compressor Bolts | 16 (22) | |
| A/C Compressor Clutch Spring Plate | 15 (20) | |
| Pressure Safety Switch | ||
| High Pressure | (1) 18 (25) | |
| Low Pressure | (1) 14 (19) | |
| INCH Lbs. (N.m) | ||
| Heater Core Stud Nuts | 27 (3.0) | |
| Heater-To-Body Screw | 40 (4.5) | |
| (1) Apply locking compound to threads. | ||
| (1) | Apply locking compound to threads. |
TORQUE SPECIFICATIONS
