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.


NOTE:
- System components marked with an asterisk * can only be serviced or replaced after discharging refrigerant system. Use Kent Moore ACR4 or equivalent.
- Before carrying out any work on the A/C refrigerant system, refer to A/C refrigerant system safety measures.


1 - Damper*
- In refrigerant hose from expansion valve to compressor.
2 - Refrigerant hose*
- From expansion valve to compressor (with damper)
3 - Refrigerant pipe*
- From receiver drier to expansion valve
4 - Service valve - (evacuating/charging)*
- Only use Kent Moore ACR4 or equivalent
5 - A/C pressure switch -F129- or high pressure sensor -G65-
- A/C pressure switch or sensor can be removed without discharging refrigerant system.
- Tightening torque 8 Nm (71 in. lb)
- Always replace 0 ring (note Part No.).
- -G65- monitored by On Board Diagnostics of Engine Control Module (ECM)

Function:
- -F129- switches the coolant fan -V7- to next higher speed when pressure increases in refrigerant circuit.
- -F129- switches off A/C clutch whenever excessive refrigerant system pressure is present (e.g.: insufficient air flow over condenser or if system is overcharged).
- -F129- switches off A/C clutch whenever insufficient refrigerant system pressure is present (e.g.: refrigerant has leaked out).
- -G65- supplies refrigerant system pressure signal to coolant fan control module -J293- and ECM.
6 - Expansion valve*
7 - Dust and pollen filter
- With activated charcoal filter
8 - Evaporator water drain valve
9 - A/C cut-out thermal switch - F163
- Switches off A/C clutch - N25- at excessively high coolant temperatures.
- Off at 119 °C (246 °F)
- On at 112 °C (234 °F).


NOTE: Thermal cutout function assumed by Engine Coolant Temperature (ECT) Sensor -G62- via Engine Control Module (ECM).


10 - Coolant fan control module -J293-
11 - Outside temperature sensor -G17-
- Function: Temperature sensor controls temperature flap and fresh air blower, depending on temperature
- In the event of malfunction: fresh air intake duct temperature sensor -G89- takes over. If both sensors are malfunctioning, operation continues assuming a value of +10 °C (50 °F). Air recirculation not possible. A/C control head -E87- indicates: "--"
12 - Refrigerant hose*
- From expansion valve to compressor
- With damper
13 - Refrigerant hose*
- From compressor to condenser
14 - Condenser*
15 - Pressure relief valve*
16 - Compressor*
- Manufacturer: Sanden, designation: SD7V16
- Manufacturer: Zexel, designation: DCW-17D
17 - A/C clutch -N25-
18 - Receiver drier*