Climatronic Components In Engine Compartment, Servicing

Climatronic Components In Engine Compartment, Servicing







CAUTION:
Before beginning repairs:
- Switch off all electrical consumers.
- Switch off ignition.
- Remove ignition key from ignition switch.

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.
- With low pressure service valve where applicable (use only use Kent Moore ACR4 or equivalent)
2. Refrigerant hose*
- From expansion valve to compressor (with damper)
3. Refrigerant pipe*
- From receiver drier to expansion valve
4. High pressure service valve*
- 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 O ring (note Part No.).
- -F129- checking
- -G65- checking
- -F129- and -G65- can also be checked using VAS 5051 in mode "Guided Fault Finding".
- -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 condensor 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
- Checking
9. A/C cut-out thermal switch -F163- through 04.99
- Switches off A/C clutch -N25- at excessively high coolant temperatures.
- Off at 119 degrees C (246 degrees F)
- On at 112 degrees C (234 degrees F).

NOTE: -F163- deleted from 05.99. Thermal cut-out function assumed by Engine Coolant Temperature (ECT) Sensor -G62- via Engine Control Module (ECM).

10. Coolant Fan Control (FC) 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 degrees C (50 degrees F). Air recirculation not possible. A/C control head -E87- indicates: "--"
- Checking use VAS 5051 in mode "Guided Fault Finding"
12. Refrigerant hose*
- From expansion valve to compressor
- With damper
13. Refrigerant hose*
- From compressor to condenser
14. Condenser*
15. Pressure relief valve*
- Checking
16. Compressor*
- Manufacturer: Sanden, designation: SD7V16
- Manufacturer: Zexel, designation: DCW-17D
17. A/C clutch -N25-
- Sanden, servicing:.
- Zexel, servicing:.
18. Receiver drier*