Chrysler RG Voyager. Manual — part 1211
Condition
Possible Causes
Correction
Normal pressures, but A/C
Performance Test air
temperatures at center panel
outlet are too high.
1. Excessive refrigerant oil in
system.
1. See Refrigerant Oil Level in this group.
Recover the refrigerant from the refrigerant
system and inspect the refrigerant oil content.
Restore the refrigerant oil to the proper level, if
required.
2. Blend door actuator
improperly installed or faulty.
2. See Blend Door Actuator in this group. Inspect
the actuator for proper operation and replace, if
required.
3. Blend door inoperative or
sealing improperly.
3. See HVAC Housing in this group. Inspect the
blend door for proper operation and sealing.
Repair if required.
4. Blend door not in full cold
position.
Use a DRBIII Scan Tool to check for DTCs and
blend door position. Refer to Body Diagnostic
Procedures.
The low side pressure is
normal or slightly low, and the
high side pressure is too low.
1. Low refrigerant system
charge.
1. See Refrigerant System Leaks in this group.
Test the refrigerant system for leaks. Repair,
evacuate and charge the refrigerant system, if
required.
2. Refrigerant flow through
the A/C evaporator is
restricted.
2. See A/C Evaporator in this group. Replace the
restricted A/C evaporator, if required.
3. Faulty A/C compressor.
3. See A/C Compressor in this group. Replace
the compressor, if required.
The low side pressure is
normal or slightly high, and
the high side pressure is too
high.
1. A/C condenser air flow
restricted.
1. Check the A/C condenser for damaged fins,
foreign objects obstructing air flow through the
condenser fins, and missing or improperly
installed air seals. Clean, repair, or replace
components as required.
2. Refrigerant flow through
the receiver/drier is
restricted.
2. See Receiver/Drier in this group. Replace the
restricted receiver/drier, if required.
3. Inoperative radiator
cooling fan.
3. Test the radiator cooling fan and replace, if
required. Refer to Group 7.
4. Refrigerant system
overcharged.
4. See Refrigerant System Charge in this group.
Recover the refrigerant from the refrigerant
system. Charge the refrigerant system to the
proper level, if required.
5. Air in the refrigerant
system.
5. See Refrigerant System Leaks in this group.
Test the refrigerant system for leaks. Repair,
evacuate and charge the refrigerant system, if
required.
6. Engine overheating.
6. Test the engine cooling system and repair, if
required. Refer to Group 7.
The low side pressure is too
high, and the high side
pressure is too low.
1. Accessory drive belt
slipping.
1. Inspect the accessory drive belt condition and
tension. Tighten or replace the accessory drive
belt, if required. Refer to Group 7.
2. Faulty A/C expansion
valve.
2. See A/C Expansion Valve in this group.
Replace the valve, if required.
3. Faulty A/C compressor.
3. See A/C Compressor in this group. Replace
the compressor, if required.
RS
HEATING & AIR CONDITIONING
24 - 9
HEATING & AIR CONDITIONING (Continued)
Condition
Possible Causes
Correction
The low side pressure is too
low, and the high side
pressure is too high.
1. Restricted refrigerant flow
through the refrigerant lines.
1. See Liquid Line, Suction Line and Discharge
Line in this group. Inspect the refrigerant lines for
kinks, tight bends or improper routing. Correct
the routing or replace the refrigerant line, if
required.
2. Restricted refrigerant flow
through the A/C expansion
valve.
2. See A/C Expansion Valve in this group.
Replace the valve, if required.
3. Restricted refrigerant flow
through the A/C condenser.
3. See A/C Condenser in this group. Replace the
restricted condenser, if required.
HEATER PERFORMANCE TEST
WARNING: Review safety precautions and warnings
in this group before performing this procedure
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - WARNINGS) and (Refer to 24
-
HEATING
& AIR
CONDITIONING/PLUMBING
-
FRONT - CAUTIONS). Failure to follow the warnings
and cautions could result in possible personal
injury or death.
Check the coolant level, drive belt tension, radiator
air flow and fan operation. Start engine and allow to
warm up to normal operating temperature.
WARNING: Do not remove radiator cap when engine
is hot, personal injury can result.
If vehicle has been run recently, wait 15 minutes
before removing the radiator cap. Place a rag over
the cap and turn it to the first safety stop. Allow
pressure to escape through the overflow tube. When
the system pressure stabilizes, remove the cap com-
pletely.
MAXIMUM HEATER OUTPUT: TEST AND ACTION
Engine coolant is provided to the heater system by
two heater hoses. With the engine idling at normal
operating temperature, set the temperature control
to maximum heat, the mode control to the floor posi-
tion, and the blower in the highest speed position.
Using a test thermometer, check the temperature of
the air being discharged from the floor outlets. Com-
pare the test thermometer reading to the Tempera-
ture Reference chart.
TEMPERATURE REFERENCE
Ambient Temperature
Minimum Floor Outlet Temperature
Celsius
Fahrenheit
Celsius
Fahrenheit
15.5°
60°
62.2°
144°
21.1°
70°
63.8°
147°
26.6°
80°
65.5°
150°
32.2°
90°
67.2°
153°
If the floor outlet air temperature is insufficient,
check that the cooling system is operating to specifi-
cations (Refer to 7 - COOLING/ENGINE - DIAGNO-
SIS AND TESTING). Both heater hoses should be
HOT to the touch (the coolant return hose should be
slightly cooler than the supply hose). If the coolant
return hose is much cooler than the supply hose,
locate and repair the engine coolant flow obstruction
in heater system.
OBSTRUCTED COOLANT FLOW Possible locations or causes
of obstructed coolant flow are as follows:
• Pinched or kinked heater hoses.
• Improper heater hose routing.
• Plugged heater hoses or supply and return ports
at the cooling system connections.
• Plugged heater core.
If proper coolant flow through the cooling system is
verified, and heater outlet air temperature is insuffi-
cient, a mechanical problem may exist.
24 - 10
HEATING & AIR CONDITIONING
RS
HEATING & AIR CONDITIONING (Continued)
MECHANICAL PROBLEMS
Possible causes of insufficient heat due to mechan-
ical problems are as follows:
• Faulty engine thermostat.
• Faulty blend door actuator.
• Obstructed fresh air intake.
• Obstructed heater system outlets.
• Faulty blend-air door.
TEMPERATURE CONTROL
If the heater outlet air temperature cannot be
adjusted with the temperature control knob on the
A/C-heater control panel, the following could require
service:
• Faulty blend door actuator.
• Faulty A/C-heater control.
• Faulty related wiring harness or connectors.
• Faulty blend-air door.
SPECIFICATIONS
HEATING-A/C SYSTEM
A/C SYSTEM
Item
Description
Notes
A/C Compressor
Denso 10S17 – 2.4L/2.5L/2.8L/3.3L without
rear A/C
Denso 10S20 – 3.3L/3.8L with rear A/C
ND-8 PAG Oil
Freeze–up Control
Evaporator temperature sensor
HVAC housing mounted (RS
models), Evaporator mounted
(RG models) - input to A/C-heater
control module
Low PSI Control
A/C pressure transducer
Liquid line mounted - input to
Powertrain Control Module (PCM)
- PCM opens compressor clutch
relay below 110 kPa (16 psi)
High PSI Control
A/C pressure transducer
Liquid line mounted - input to
PCM - PCM opens compressor
clutch relay above 3082 kPa (447
psi)
High Pressure relief valve
A/C Compressor mounted -
opens above 3445-4135 kPa
(500-600 psi), closes below 2756
kPa (400 psi)
Refrigerant Charge Capacity
Refer to the A/C Underhood Specification
Label locatred in the engine compartment
R-134a refrigerant
A/C Clutch Coil Draw
Denso 10S17 – 3.3 amps
Denso 10S20 – 2.2 amps
@ 12V ± 0.5V @ 21° C (70° F)
A/C Clutch Air Gap
0.35 - 0.60 mm (0.014 - 0.024 in.)
FASTENER TORQUE
Description
N·m
Ft. Lbs.
In. Lbs.
All Screws NOT Listed Below
2
–
17
A/C Compressor Shaft Bolt
17.5
–
155
A/C Compressor Mounting Bolts (2.4L/2.5L/
2.8L)
28
21
–
A/C Compressor Mounting Bolts (3.3L/3.8L)
54
40
–
A/C Compressor Mounting Bracket Bolts
(2.4L)
54
40
–
RS
HEATING & AIR CONDITIONING
24 - 11
HEATING & AIR CONDITIONING (Continued)
Description
N·m
Ft. Lbs.
In. Lbs.
A/C Condenser Mounting Bracket Bolts
5
–
45
Front A/C Expansion Valve Bolts
11
–
97
Discharge Line to Compressor Nut
23
17
–
Discharge Line to Condenser Nut
23
17
–
Front Fascia Bolts
6
–
53
Hood Latch Bolts
14
–
123
Front HVAC Housing Bracket Bolt and Nut
3
–
26
Front HVAC Housing Mounting Nuts
7
–
62
Liquid Line to Condenser Nut
23
17
–
Liquid Line to Receiver/Drier Bolt
11
–
97
Rear Evaporator Line Seal Plate to Rear
Expansion Valve Nut
23
17
–
Rear Expansion Valve Bracket Nut
23
17
–
Rear Expansion Valve to Rear Evaporator
Bolts
11
–
97
Rear HVAC Housing Bolts
11
–
97
Rear HVAC Housing Nuts
9
–
80
Receiver/Drier Bracket Nuts
10
–
89
Refrigerant Lines to Front Expansion Valve
Nut
23
17
–
Suction Line to Compressor Nut
23
17
–
Cabin Heater Air Intake Pipe Bolts
7
–
62
Cabin Heater M6 Bolts
7
–
62
Cabin Heater M8 Bolts
23
17
–
Cabin Heater Seat Hex Nut
60
44
–
Underbody Liquid Line Fitting
23
17
–
Underbody Refrigerant Line Sealing Plate
Bolt/Nut
23
17
–
Underbody Suction Line Fitting
23
17
–
SPECIAL TOOLS
HEATING-A/C SYSTEM
Snap Ring Pliers C-4574 (Fig. 2) are required to
service the A/C clutch and field coil.
Fig. 2
24 - 12
HEATING & AIR CONDITIONING
RS
HEATING & AIR CONDITIONING (Continued)
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