Heating and A/C Components In Engine Compartment, Servicing
Heating And A/C Components In Engine Compartment, Servicing
CAUTION!
- Before working on the electrical system, obtain radio security code and disconnect battery Ground (GND) strap.
- When reconnecting battery, always check operation of vehicle equipment such as radio, clock, and power windows.
NOTE:
- System components identified with an * must only be serviced or replaced after discharging refrigerant system. Use Kent Moore ACR4 or equivalent.
- Illustration shows vehicle with engine code AHA.
1 - Accumulator*
2 - Refrigerant hose*
- Between evaporator and accumulator
3 - Refrigerant hose*
- Between evaporator and condenser
4 - Low pressure service valve*
5 - High pressure service valve*
6 - Dust and pollen filter
- Ambient temperature switch -F38- located below dust and pollen filter in lower air intake housing.
7 - Evaporator*
- In passenger compartment
8 - Evaporator water drain valve
- Checking See Fig. 1.
9 - Pressure relief valve*
- Zexel compressor illustrated
10 - Compressor*
11 - A/C clutch -N25-
12 - Condenser*
13 - A/C pressure switch -F129-
- Tightening torque 8 Nm (71 in lb)
- Replace O ring (note Part No.).
Function:
- Switches coolant fan -V7- to next highest speed when pressure increases in refrigerant circuit.
- Switches off A/C clutch - N25- when refrigerant pressure is excessive (e.g.: insufficient engine cooling).
- Switches off A/C clutch - N25- when refrigerant pressure is too low (e.g.: refrigerant loss).
- Replacing, up to 10.00 See Fig. 2.
- Replacing, from 10.00 See Fig. 3.
14 - Refrigerant hose*
- Between compressor and condensor
15 - Refrigerant hose*
- Between compressor and accumulator.
Fig. 1 Evaporator water drain valve, checking
Check valve as follows:
- Remove securing nuts -arrows- on right catalytic converter heat shield -1-.
- Remove catalytic converter heat shield.
Check valve as follows to ensure proper function:
- The valve must not be stuck together.
- The opening in the sealing cap of the valve must point downwards.
- The right catalytic converter heat shield plate must not be deformed or damaged in the area of the valve.
- Remove valve -1- from bulkhead -2-.
- The valve sealing lip -1- must cover the water drain guide outlet completely.
Fig. 2 A/C pressure switch -F129- up to 10.00, replacing
1 - Connection
2 - A/C pressure switch -F129- (8 Nm)
3 - Hex (to counter-hold)
4 - Condensor connection
5 - Lock carrier
6 - Cover
- Remove right headlight
- Remove bolt -arrow- (below cover -6-) between lock carrier -5- and cover -6-.
- Disconnect electrical connector -1-.
To prevent damage to condenser pipe connection -4- counter-hold hex fitting -3- with appropriate wrench when loosening switch.
- Remove A/C pressure switch -2-.
Fig. 3 A/C pressure switch -F129- from 10.00, replacing
1 - Connector
2 - A/C pressure switch -F129- (8 Nm)
3 - Hex (to counter-hold)
4 - Condensor connection
- Remove front bumper
- Remove front bumper carrier
- Separate electrical connection -1-
To prevent damage to condenser pipe connection -4- counter-hold hex fitting -3- with appropriate wrench when loosening switch.
- Remove A/C pressure switch -2-.