System Components
A/C REFRIGERANT SYSTEM (R-134A), COMPONENTSNote!
^ Replacement A/C compressors supplied by the Parts Department are fitted with 250 cc (8.5 fl oz) of A/C refrigerant (PAG) oil. This is the total A/C system refrigerant oil capacity
^ Do Not top-off a charged refrigerant system. Instead, discharge, evacuate and recharge system.
^ For A/C refrigerant system capacities, see capacities section.
^ Only use new O-rings specified for use with R-134a.
^ O-ring and torque specifications also apply to threaded connections in the A/C lines.
System Components Diagram
1 - Compressor (Zexel)
^ O-ring seal:
Low pressure connection:
17.2 mm inside diameter
1.8 mm thickness
High pressure connection:
14.0 mm inside diameter
1.8 mm thickness
^ Torque:
Low pressure connection:
40 Nm (29.5 ft lb)
High pressure connection:
30 Nm(22.1 ft lb)
CAUTION
Mark travel direction of ribbed drive belt before removing. Reversing direction could cause the belt to fail.
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.
Note!
The variable displacement A/C compressor varies piston stroke and output depending on load requirements and suction pressure.
Ensure A/C compressor refrigerant lines are properly insulated from exhaust system heat.
2 - A/C compressor speed sensor
^ O-ring seal:
15.5 mm inside diameter
1.5 mm thickness
CAUTION
Discharge A/C system before removing A/C compressor speed sensor
3 - A/C Clutch
* Original equipment O-ring may be black in color. When replacing, use O-ring specified by Parts information.
4 - Oil drain plug
^ O-ring seal*:
7.8 mm inside diameter
1.9 mm thickness
^ Torque:
10 Nm (7.4 ft lb)
Note!
Only remove drain plug with compressor removed from vehicle. Use drain plug to drain/add oil to compressor and to check amount of oil in compressor.
5 - Pressure relief valve
^ O-ring seal*:
8.8 mm inside diameter
1.9 mm thickness
^ Torque:
10 Nm (7.4 ft lb)
CAUTION
Discharge A/C system before removing pressure relief valve.
* Original equipment O-ring may be black in color. When replacing, use O-ring specified by Parts information.
6 - Connection with Schrader valve for A/C refrigerant high pressure switch.
7 - A/C refrigerant high pressure switch
^ Switches A/C clutch OFF if system pressure is too high
^ Switch identification: red housing with bonded wire connections
^ Switching pressures: Opens (compressor OFF):
^ 28.2-31.0 bar (409-450 psi)
Closes (compressor ON):
^ 10.3-17.2 bar (149-250 psi)
^ O-ring seal:
7.6 mm inside diameter
1.8 mm thickness
^ Torque: 5 Nm (44 in. lb)
8 - Condenser
^ O-ring seal inlet:
14.0 mm inside diameter
1.8 mm thickness
^ O-ring seal outlet:
10.8 mm inside diameter
1.8 mm thickness
^ Torque: Inlet:
30 Nm (22.1 ft lb)
^ Outlet:
15 Nm (11.0 ft lb)
9 - Service valve (high pressure)
^ Used for checking system pressure, discharging, evacuating and recharging system
^ Mounted on front of condenser
10 - Cap, with seal
^ Always reinstall over valve
11 - Connection with Schrader valve
^ For A/C refrigerant high pressure switch
12 - A/C refrigerant high pressure switch
^ Switches coolant fan to 2nd speed operation.
^ Switch identification: green housing with bonded wire connections
^ Switching pressures: Closes (coolant fan 2nd speed ON): 14.2-17.4 bar
(206-252 psi)
Opens (coolant fan 2nd speed OFF): 11.7-15.0 bar (170-218 psi)
^ Opening and closing switching points must be at least 2 bar (29 psi) difference
^ O-ring seal:
7.6 mm inside diameter
1.8 mm thickness
^ Torque:
5 Nm (44 in. lb)
13 - Restrictor
^ O-ring seal:
7.5 mm inside diameter
1.5 mm thickness
^ O-ring seal inlet:
10.8 mm inside diameter
1.8 mm thickness
14 - Evaporator
^ O-ring seal inlet:
10.8 mm inside diameter
1.8 mm thickness
^ O-ring seal outlet:
17.2 mm inside diameter
1.8 mm thickness
^ Torque:
Inlet: 15 Nm (11.0 ft lb)
Outlet: 40 Nm (29.5 ft lb)
Note!
Do not disassemble evaporator and housing.
15 - A/C refrigerant low pressure switch (F 73)
^ Switches A/C clutch OFF if system suction pressure is too low (low refrigerant charge).
^ Switching pressures:
Opens (compressor OFF): 1.45-1.6 bar (21-23 psi)
Closes (compressor ON): 2.9-3.4 bar (42-49 psi)
^ O-ring seal:
8.9 mm inside diameter
1.8 mm thickness
^ Torque: 5 Nm (44 in. lb)
16 - Connection with Schrader valve
^ For A/C refrigerant low pressure switch
17 - 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
^ Torque:
Inlet: 40 Nm (29.5 ft lb)
Outlet: 40 Nm (29.5 ft lb)
18 - Connection with Schrader valve
19 - Cap, with seal
^ Always reinstall over valve