Heating and A/C Engine Compartment Component Overview
Heating and A/C Engine Compartment Component Overview
CAUTION!
Before beginning repairs on the electrical system:
• Obtain the anti-theft radio security code.
• Switch off all electrical consumers.
• Switch off ignition and remove ignition key.
• Disconnect negative ( - ) battery terminal.
• When disconnecting and reconnecting battery terminals, observe all applicable Notes and torque specifications, as well as instructions on performing OBD program and electrical system function checks as specified.
• Immediately plug open connections on A/C components to prevent dirt and moisture contamination.
• Before carrying out any work on the A/C refrigerant system, refer to A/C refrigerant system safety measures => [ Safety Precautions ] Service Precautions.
• System components identified with an * must only be serviced or replaced after discharging refrigerant system.
1 Damper*
2 Refrigerant hose*
• With damper
3 Refrigerant pipe*
4 Ambient Temperature Switch (F38)
• Switches off A/C Clutch (N25) at low ambient temperatures
• Off at -1°C (30°F)
• On at 7°C (45°F )
5 Refrigerant pipe
• From receiver drier to expansion valve
6 Low pressure service valve
• Only use Kent Moore ACR4 or equivalent
7 A/C Pressure Switch (F129) or High Pressure Sensor (G65)
• Depending on engine type, refrigerant systems have either an A/C Pressure Switch (F129) or High Pressure Sensor (G65) installed. Refer to appropriate wiring diagram.
• A/C Pressure Switch (F129), checking => [ A/C Pressure Switch, Checking ] A/C Pressure Switch, Checking
• High Pressure Sensor (G65), checking => [ High Pressure Sensor, Electrical Testing ] High Pressure Sensor, Electrical Testing
• Removing and installing => [ A/C Pressure Switch and High Pressure Sensor ] Service and Repair
• Component can be removed without discharging refrigerant system
8 Expansion valve*
9 Evaporator water drain valve from 06.00
• Checking => [ Evaporator Water Drain Valve from 06.00, Checking ] Testing and Inspection.
10 Evaporator water drain valve through 05.00
11 A/C Cut-Out Thermal Switch (F163)
• Switches off A/C Clutch (N25) at excessively high coolant temperature
• Off at 119°C (246°F)
• On at 112°C (234°F)
12 Coolant Fan control (FC) control module (J293 )
13 Refrigerant hose*
• From compressor to condenser
14 Refrigerant hose
• From expansion valve to compressor
• With damper
15 Pressure relief valve*
• On compressor
• Checking => [ Pressure Relief Valve, Checking ] Pressure Relief Valve, Checking
16 Condenser*
17 Compressor*
• Sanden SD7-V16
18 A/C Clutch (N25)
• Servicing => [ A/C Clutch, Sanden Assembly Overview ] A/C Clutch, Sanden Assembly Overview.
19 Receiver drier*