A/C System Overview and Service Information
A/C Refrigerant System (R-134a), Overview and General Service Information
NOTE:
- A/C system components identified with an * must only be serviced or replaced after discharging refrigerant system.
- Discharging refrigerant system.
- A/C system cooling performance test.
- Refrigerant system pressure test.
- A/C system components, engine compartment.
- Zexel A/C compressors are installed from start of production. During m.y. 1996, Nippondenso compressors are installed as a running change.
- Replacement A/C compressors are filled with 250 cc (8.5 fl oz) of A/C refrigerant (PAG) oil. This is the total A/C refrigerant system oil capacity.
- Do not top-off a charged refrigerant system. Instead, discharge, evacuate and recharge system.
1 - Compressor (Zexel)*
- O-ring:
- Low pressure connection: 17.2 mm inside diameter 1.8 mm thickness
- High pressure connection: 14.0 mm inside diameter 1.8 mm thickness
- Tightening torque:
- Low pressure connection: 40 Nm (29.5 ft lb)
- High pressure connection: 30 Nm (22.1 ft lb)
NOTE:
- Zexel and Nippondenso compressor ribbed drive belts are different. Always refer to recent parts information.
- Mark travel direction of ribbed drive belt before removing. Reversing direction may cause belt damage.
- If a new A/C compressor is installed, or if oil was added to compressor, manually rotate compressor 10 times before operating the system to prevent compressor damage.
2 - A/C compressor speed sensor -G111-* (Zexel compressor only)
- O-ring seal*: 15.5 mm inside diameter 1.5 mm thickness
CAUTION!
Refrigerant system must be discharged and compressor removed prior to removal or replacement of G111.
3 - A/C Clutch (N25)
4 - Oil drain plug*
NOTE:
- Remove only with compressor removed from vehicle
- Use to drain or add PAG refrigerant oil, or to check the amount of oil in the compressor.
- Zexel compressor:
- O-ring: 7.8 mm inside diameter 1.9 mm thickness
- Tightening torque: 10 Nm (7 ft lb)
- Nippondenso compressor:
- Installed with sealing ring instead of O-ring
- Always replace sealing ring
- Tightening torque: 10 Nm (7 ft lb)
5 - Pressure relief valve*
- O-ring: 8.8 mm inside diameter 1.9 mm thickness
- Tightening torque: 10 Nm (7 ft lb)
CAUTION!
Refrigerant system must be discharged and compressor removed prior to removal of oil drain plug and pressure relief valve. Use drain plug to drain/add oil to compressor and to check oil level in compressor.
6 - Connection with Schrader valve*
- For A/C refrigerant high pressure switch (-F23-/-F118-)
7 - A/C refrigerant high pressure switch (-F23-/-F118-)
- Both switch functions are incorporated into a single housing
- O-ring: 7.6 mm inside diameter 1.8 mm thickness
- Tightening torque: 5 Nm (44 in. lb)
8 - Cap with seal
- Always reinstall after using service valve
9 - Service valve (high pressure)
- Installed on condensor inlet line
- Used for checking system pressure, discharging, evacuating and recharging system
10 - Condenser*
- Different fluid amounts for R134a depending on type of condenser.
- O-ring, inlet: 14.0 mm inside diameter 1.8 mm thickness
- O-ring, outlet: 7.6 mm inside diameter 1.8 mm thickness
- Tightening torque: Inlet: 30 Nm (22.1 ft lb); Outlet: 15 Nm (11.0 ft lb)
11 - Coupling for restrictor*
- Located on evaporator inlet line
- O-ring: 10.8 mm inside diameter 1.8 mm thickness
- Tightening torque: 15 Nm (11 ft lb)
12 - Restrictor*
- O-ring: 7.5 mm inside diameter 1.5 mm thickness
13 - Evaporator*
- O-ring, inlet: 10.8 mm inside diameter 1.8 mm thickness
- O-ring, outlet: 17.2 mm inside diameter 1.8 mm thickness
- Torque (evaporator line retaining bracket): 15 Nm (11 ft lb)
14 - A/C refrigerant low pressure switch (F73)
- O-ring: 7.6 mm inside diameter 1.8 mm thickness
- Tightening torque: 5 Nm (44 in. lb)
15 - Connection with Schrader valve*
- For A/C refrigerant low pressure switch (F73)
16 - Accumulator*
- O-ring seal inlet: 17.2 mm inside diameter 1.8 mm thickness
- O-ring seal outlet: 17.2 mm inside diameter 1.8 mm thickness
- Tightening torque: Inlet: 40 Nm (30 ft lb); Outlet: 40 Nm (30 ft lb)