Components In Engine Compartment, Servicing

Climatronic Components In Engine Compartment, Servicing


CAUTION!
Before beginning repairs on the electrical system:
- Obtain the anti-theft radio security code.
- Switch the ignition off.
- Disconnect the battery Ground (GND) strap.
- After reconnecting battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Manual and/or Owner's Manual.


NOTE: System components identified with an * must only be serviced or replaced after discharging refrigerant system. Use Kent Moore ACR4 or equivalent.







1 - Air intake duct
2 - Vacuum reservoir
- Where applicable
- Insert vacuum hose: 30 mm (13/16 in) into reservoir
3 - Heater core and vacuum hose guide at bulkhead
4 - A/C Engine Coolant Temperature Sensor -G110-
- Function: Provides engine coolant temperature measurement signal to Climatronic control module -J255- for defrost/footwell air distribution and fresh air blower control
- If sensor -G110- malfunctions, default value of 80 °C (176 °F) is assumed
5 - Evaporator drain pipe
6 - Evaporator water drain valve
- Water leak at housing may result if valve blocked
7 - Individual fuses for coolant fan -S42- (2x)
- In engine compartment, front left
8 - Coolant Fan Control (FC) Relay -J26-
- In engine compartment, front left
9 - Engine Coolant Two-way Vacuum Valve -N147-
- Shuts off vacuum flow when no voltage is present.
- After attaching vacuum hoses, check:
- When connected the vacuum unit must pull in if voltage and vacuum are present.
- when connected the vacuum unit is vented if vacuum is present and voltage is not.
10 - Auxiliary Heater Valve -N172- (rear heater)
- Function: Controls coolant flow through rear heater core
11 - Condenser*
12 - Coolant valve shut-off
- Function: Engine Off: Vacuum supply to cool ant shut-off valve is control led by engine coolant two-way vacuum valve -N147-. Valve allows coolant to circulate from engine to radiator when after run coolant Pump operates.
13 - Coolant Pump -V50-
14 - Pressure relief valve*
- Protects refrigerant circuit against over pressure
15 - A/C Pressure Switch -F129-
- Removing and installing:
- Tightening torque 8 Nm
- Replace O-ring (note Part No.).
16 - A/C Cut-Out Thermal Switch -F163- and Third Speed Coolant Fan Control (FC) Thermal Switch -F165-
- In engine compartment, front
- Function: -F165- switches- on coolant fan 3rd speed (on at 112 °C / 234°F, off at 108 °C / 226 °F).
- -F163- * switches off A/C clutch -N25- at excessive coolant temperatures (off at 195 °C / 246 °F, on at 11 °C / 234 °F).
17 - A/C Clutch -N25-*
18 - Outside Air Temperature Sensor -G17-
- Function: Provides outside (ambient) temperature measurement signal to Climatronic control module -J255- for temperature flap and fresh air blower control
- If sensor -G17- malfunctions, default value of 10 °C (50 °F) is assumed
19 - Receiver drier*
20 - Service valves*
21 - Expansion valve*
- Opening at bulkhead must be sealed to prevent water ingress