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Heating, Ventilation and Air Conditioning Cadillac CTS I

Automatic HVAC System 8 illustrations ~14501 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
A/C Compressor Bracket Mounting Bolt50 N.m36 lb ft
A/C Compressor Mounting Bolt (M8)25 N.m18 lb ft
A/C Compressor Mounting Bolt (M10)50 N.m36 lb ft
Air Inlet Assembly Lower Bolt9 N.m80 lb in
Air Inlet Assembly Upper Bolts9 N.m80 lb in
Air Outlet Duct Screws2 N.m17 lb in
Blower Motor Mounting Screws1.5 N.m13 lb in
Compressor Discharge Hose Bolt9.8 N.m87 lb in
Compressor Suction Hose Bolt9.8 N.m87 lb in
Condenser Inlet Hose Bolt5.4 N.m48 lb in
Condenser Mounting Bolts3.9 N.m35 lb in
Condenser Discharge Hose Bolt5.4 N.m48 lb in
Desiccant Bag Plug12.5 N.m111 lb in
Evaporator Tube to Fan Shroud Screw1 N.m9 lb in
Heater Hose Bracket Screws1 N.m9 lb in
HVAC Module Mounting Nuts9 N.m80 lb in
HVAC Module Screws1 N.m9 lb in
Liquid Line Bracket Screw1 N.m9 lb in
Power Steering Line Bracket Nuts8 N.m71 lb in
Rear Air Outlet Duct Nut9 N.m80 lb in
Refrigerant Pressure Sensor9.8 N.m87 lb in
TXV Bolts3.5 N.m31 lb in

Fastener Tightening Specifications

Refrigerant System Capacities

ApplicationSpecification
MetricEnglish
PAG Oil GM P/N 12378526 for United States PAG Oil GM P/N 88900060 for Canada
Compressor Replacement35 ml 11.18 oz 1
The Denso Service Compressor is precharged with the specified amount of PAG Oil140 ml4.75 oz
Condenser Replacement40 ml 11.35 oz 1
Desiccant Bag Replacement10 ml 10.34 oz 1
Evaporator Replacement40 ml 11.35 oz 1
Total System PAG Oil Capacity140 ml4.75 oz
R-134a
Refrigerant Charge0.59 kg1.3 lb
1 If more than the specified amount of PAG oil was drained from a component, add the equal amount of oil drained.

Refrigerant System Capacities

The Heating, Ventilation and Air Conditioning (HVAC) system is divided into 2 sections. The first, Heating, Ventilation and Air Conditioning, has all procedures that pertain to a HVAC component or function that are not specifically associated with an automatic control system. The second, HVAC Systems-Automatic, has all the procedures specific to the automatic control system.

Begin the system diagnosis with the Diagnostic System Check - HVAC Systems - Automatic in HVAC Systems-Automatic.

The Diagnostic System Check will provide the following information

  1. The identification of the control modules which command the system.
  2. The ability of the control modules to communicate through the class 2 serial data circuit.

The use of the Diagnostic System Check will identify and lead the technician to the correct diagnostic procedure.

Review the Description and Operation information to help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. The HVAC Description and Operation information is divided into

  1. «Air Delivery Description and Operation»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#hvac-systems-automatic__air-delivery-description-and-operation) in HVAC Systems-Automatic
  2. «Air Temperature Description and Operation»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#hvac-systems-automatic__air-temperature-description-and-operation) in HVAC Systems-Automatic

The Air Delivery Description and Operation contains the following topics

  1. Air Speed
  2. Air Distribution

The Air Temperature Description and Operation contains the following topics

  1. Heater Mode
  2. A/C Mode
  3. A/C Cycle

Leak Testing

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 41447 Leak Detection Dye
  3. J 42220 Leak Detection Lamp. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. J 43872 Fluorescent Dye Cleaner. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. J 46297 A/C Dye Injector Kit. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. J 46297-12 Replacement Dye Cartridges. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Refrigerant Leak Testing

IMPORTANTGeneral Motors vehicles are now manufactured with fluorescent dye installed directly into the air conditioning (A/C) system.

The fluorescent dye mixes and flows with the polyalkylene glycol (PAG) oil throughout the refrigerant system.

Verifying some passive leaks may require using the J 39400-A , even though the A/C system contains fluorescent dye. See Special Tools and Equipment .

The only time that adding additional fluorescent dye is required is after flushing the A/C system.

Fluorescent Leak Detector

Fluorescent dye will assist in locating any leaks in the A/C system.

  1. Condensation on the evaporator core or the refrigerant lines may wash the PAG oil and fluorescent dye away from the actual leak. Condensation may also carry dye through the HVAC module drain.
  2. Leaks in the A/C system will be indicated in a light green or yellow color when using the leak detection lamp. Use the leak detection lamp in the following areas: All fittings or connections that use seal washers or O-rings All of the A/C components The A/C compressor shaft seal The A/C hoses and pressure switches The HVAC module drain tube, if the evaporator core is suspected of leaking The service port sealing caps The sealing cap is the primary seal for the service ports.
  3. Follow the instructions supplied with the J 42220 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. To prevent false diagnosis in the future, thoroughly clean the residual dye from any area where leaks were found. Use a rag and the approved J 43872 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Fluorescent Dye Injection

  1. Not all of the fluorescent dyes are compatible with PAG oil. Some types of dye decrease the oil viscosity or may chemically react with the oil.
  2. R-134A leak detection dye requires time to work. Depending upon the leak rate, a leak may not become visible for between 15 minutes and 7 days.
  3. To prevent false diagnosis, thoroughly clean any residual dye from the service port with a rag and the approved fluorescent dye cleaner J 43872 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Halogen Leak Detector

CAUTIONDo not operate the detector in a combustible atmosphere since its sensor operates at high temperatures or personal injury and/or damage to the equipment may result.

Ensure that the vehicle has at least 0.45 kg (1 lb) of refrigerant in the A/C refrigeration system in order to perform a leak test. Refer to Refrigerant Recovery and Recharging for recharging the A/C system.

IMPORTANTHalogen leak detectors are sensitive to the following items: Windshield washing solutions Many solvents and cleaners Some adhesives used in the vehicle

Clean and dry all surfaces in order to prevent a false warning. Liquids will damage the detector.

IMPORTANTFollow a continuous path in order to ensure that you will not miss any possible leaks. Test all areas of the system for leaks.

Follow the instructions supplied with the J 39400-A . See Special Tools and Equipment .

Test Description

This test measures the operating efficiency of the A/C system under the following conditions

  1. The current ambient air temperature
  2. The current relative humidity
  3. The high side pressure of the A/C system
  4. The low side pressure of the A/C system
  5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

  1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
  2. 2: This step measures the performance of the A/C system.
  3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.
StepActionValuesYesNo
IMPORTANT: The ambient air temperature must be at least 16°C (60°F). Do not induce additional air flow across the front of the vehicle during the test. If you were sent here from a DTC diagnostic table, clear the DTC before starting this test.
1Park the vehicle inside or in the shade. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools and Equipment . Record the ambient air temperature displayed on the J 43600 . See Special Tools and Equipment . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value?More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi)Go to Step 2Go to Leak Testing
2IMPORTANT: If DTC B0157 is set, the compressor clutch will not engage until it is cleared. Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the drivers door window 5-6 inches (12.7-15.24cm). Start the engine. With a scan tool clear any DTCs stored in the HVAC module. Select the following HVAC control settings: The A/C is ON The maximum blower speed The Face mode The coldest temperature setting Passenger setting is off All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools and Equipment . Apply the parking brake. Place the transaxle/transmission in one of the following positions: PARK, Automatic NEUTRAL, Manual Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools and Equipment . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table?Go to Step 8Go to Step 3
3If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools and Equipment . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges?Go to Step 8Go to Step 4
4See the A/C system Pressure - Zone Classification chart. Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone AGo to Step 5
5Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone BGo to Step 6
6Are the low and high side pressures both greater than the specified ranges?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone CGo to Step 7
7Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone DGo to Step 8
8Operate the system in order to verify the test results. Did you find the same results?System OKGo to Symptoms - HVAC Systems - Automatic
IMPORTANT
The ambient air temperature must be at least 16°C (60°F). Do not induce additional air flow across the front of the vehicle during the test. If you were sent here from a DTC diagnostic table, clear the DTC before starting this test.
IMPORTANT
If DTC B0157 is set, the compressor clutch will not engage until it is cleared. Record the relative humidity and the ambient air temperature at the time of the test.
IMPORTANT
Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools and Equipment .

Air Conditioning (A/C) System Performance Test (w/o LS6)

Ambient Air TemperatureRelative HumidityService Port PressureMaximum Left Center Discharge Air Temperature
Low SideHigh Side
13-18°C (55-65°F)0-100%150-208 kPa (21-30 psi)630-1040 kPa (91-151 psi)10°C (50°F)
19-24°C (66-75°F)Below 40%150-206 kPa (21-30 psi)700-1110 kPa (101-161 psi)10°C (50°F)
Above 40%153-222 kPa (22-32 psi)810-1230 kPa (117-179 psi)11°C (52°F)
25-29°C (76-85°F)Below 35%155-215 kPa (22-31 psi)960-1280 kPa (139-186 psi)9°C (50°F)
35% to 50%164-219 kPa (23-32 psi)1020-1320 kPa (148-192 psi)10°C (50°F)
Above 50%170-226 kPa (24-33 psi)1060-1390 kPa (153-202 psi)12°C (54°F)
30-35°C (86-95°F)Below 30%170-229 kPa (24-33 psi)1150-1490 kPa (166-216 psi)11°C (52°F)
30% to 50%174-229 kPa (25-33 psi)1190-1530 kPa (172-222 psi)12°C (54°F)
Above 50%179-230 kPa (26-33 psi)1240-1580 kPa (180-229 psi)12°C (54°F)
36-41°C (96-105°F)Below 20%188-245 kPa (27-36 psi)1380-1710 kPa (200-249 psi)13°C (55°F)
20% to 40%188-241 kPa (27-35 psi)1400-1730 kPa (230-251 psi)13°C (55°F)
Above 40%186-238 kPa (27-35 psi)1430-1750 kPa (207-254 psi)15°C (56°F)
42-46°C (106-115°F)Below 20%207-259 kPa (30-38 psi)1620-1900 kPa (235-276 psi)15°C (56°F)
Above 20%205-252 kPa (29-37 psi)1630-1910 kPa (236-277 psi)15°C (56°F)
47-49°C (116-120°F)Below 30%219-263 kPa (31-38 psi)1820-2020 kPa (264-293 psi)16°C (61°F)

A/C Performance Table (LY7)

Ambient Air TemperatureRelative HumidityService Port PressureMaximum Left Center Discharge Air Temperature
Low SideHigh Side
13-18°C (55-65°F)0-100%150-221 kPa (22-32 psi)1120-1500 kPa (163-218 psi)10°C (50°F)
19-24°C (66-75°F)Below 40%150-230 kPa (22-33 psi)1090-1440 kPa (158-209 psi)10°C (50°F)
Above 40%1764-256 kPa (24-37 psi)1230-1570 kPa (179-228 psi)12°C (54°F)
25-29°C (76-85°F)Below 35%173-247 kPa (25-36 psi)1270-1530 kPa (184-222 psi)12°C (54°F)
35% to 50%186-257 kPa (27-37 psi)1340-1570 kPa (194-228 psi)13°C (55°F)
Above 50%196-278 kPa (28-40 psi)1390-1630 kPa (202-237 psi)14°C (57°F)
30-35°C (86-95°F)Below 30%194-269 kPa (28-39 psi)1410-1660 kPa (205-241 psi)14°C (57°F)
30% to 50%204-283 kPa (30-41 psi)1440-1680 kPa (209-244 psi)15°C (56°F)
Above 50%217-303 kPa (31-44 psi)1490-1700 kPa (216-247 psi)17°C (63°F)
36-41°C (96-105°F)Below 20%216-288 kPa (31-42 psi)1570-1810 kPa (228-263 psi)16°C (61°F)
20% to 40%223-301 kPa (32-44 psi)1580-1800 kPa (229-261 psi)17°C (63°F)
Above 40%236-315 kPa (34-46 psi)1590-1790 kPa (231-260 psi)18°C (64°F)
42-46°C (106-115°F)Below 20%241-309 kPa (35-45 psi)1740-1940 kPa (253-282 psi)18°C (64°F)
Above 20%248-322 kPa (36-47 psi)1730-1910 kPa (251-277 psi)19°C (66°F)
47-49°C (116-120°F)Below 30%269-328 kPa (39-48 psi)1860-2000 kPa (270-290 psi)20°C (61°F)

A/C Performance Table (LA3, LY9)

This test measures the operating efficiency of the A/C system under the following conditions

  1. The current ambient air temperature
  2. The current relative humidity
  3. The high side pressure of the A/C system
  4. The low side pressure of the A/C system
  5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

  1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
  2. 2: This step measures the performance of the A/C system.
  3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.
StepActionValuesYesNo
IMPORTANT: The ambient air temperature must be at least 16°C (60°F). Do not induce additional air flow across the front of the vehicle during the test. If you were sent here from a DTC diagnostic table, clear the DTC upon completion of this test.
1Park the vehicle inside or in the shade. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools and Equipment . Record the ambient air temperature displayed on the J 43600 . See Special Tools and Equipment . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value?More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi)Go to Step 2Go to Leak Testing
2IMPORTANT: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the driver's door window 5-6 inches (12.7-15.24cm). Select the following HVAC control settings: The A/C is ON The maximum blower speed The Face mode The coldest temperature setting Passenger setting is off All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools and Equipment . Apply the parking brake. Place the transaxle/transmission in one of the following positions: PARK, Automatic NEUTRAL, Manual Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools and Equipment . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table?Go to Step 8Go to Step 3
3If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools and Equipment . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges?Go to Step 8Go to Step 4
4See the A/C system Pressure - Zone Classification chart. Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone AGo to Step 5
5Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone BGo to Step 6
6Are the low and high side pressures both greater than the specified ranges?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone CGo to Step 7
7Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone DGo to Step 8
8Operate the system in order to verify the test results. Did you find the same results?System OKGo to Symptoms - HVAC Systems - Automatic
IMPORTANT
The ambient air temperature must be at least 16°C (60°F). Do not induce additional air flow across the front of the vehicle during the test. If you were sent here from a DTC diagnostic table, clear the DTC upon completion of this test.
IMPORTANT
Record the relative humidity and the ambient air temperature at the time of the test.
IMPORTANT
Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools and Equipment .

Air Conditioning (A/C) System Performance Test (w/ LS6)

Scheme 1

Scheme 1
Scheme 1
Ambient Air TemperatureRelative HumidityService Port PressureMaximum Left Center Discharge Air Temperature
Low SideHigh Side
13-18°C (55-65°F)0-100%150-208 kPa (21-30 psi)630-1040 kPa (91-151 psi)10°C (50°F)
19-24°C (66-75°F)Below 40%150-206 kPa (21-30 psi)700-1110 kPa (101-161 psi)10°C (50°F)
Above 40%153-222 kPa (22-32 psi)810-1230 kPa (117-179 psi)11°C (52°F)
25-29°C (76-85°F)Below 35%155-215 kPa (22-31 psi)960-1280 kPa (139-186 psi)9°C (50°F)
35% to 50%164-219 kPa (23-32 psi)1020-1320 kPa (148-192 psi)10°C (50°F)
Above 50%170-226 kPa (24-33 psi)1060-1390 kPa (153-202 psi)12°C (54°F)
30-35°C (86-95°F)Below 30%170-229 kPa (24-33 psi)1150-1490 kPa (166-216 psi)11°C (52°F)
30% to 50%174-229 kPa (25-33 psi)1190-1530 kPa (172-222 psi)12°C (54°F)
Above 50%179-230 kPa (26-33 psi)1240-1580 kPa (180-229 psi)12°C (54°F)
36-41°C (96-105°F)Below 20%188-245 kPa (27-36 psi)1380-1710 kPa (200-249 psi)13°C (55°F)
20% to 40%188-241 kPa (27-35 psi)1400-1730 kPa (230-251 psi)13°C (55°F)
Above 40%186-238 kPa (27-35 psi)1430-1750 kPa (207-254 psi)15°C (56°F)
42-46°C (106-115°F)Below 20%207-259 kPa (30-38 psi)1620-1900 kPa (235-276 psi)15°C (56°F)
Above 20%205-252 kPa (29-37 psi)1630-1910 kPa (236-277 psi)15°C (56°F)
47-49°C (116-120°F)Below 30%219-263 kPa (31-38 psi)1820-2020 kPa (264-293 psi)16°C (61°F)

A/C Performance Table (LY7)

Ambient Air TemperatureRelative HumidityService Port PressureMaximum Left Center Discharge Air Temperature
Low SideHigh Side
13-18°C (55-65°F)0-100%150-221 kPa (22-32 psi)1120-1500 kPa (163-218 psi)10°C (50°F)
19-24°C (66-75°F)Below 40%150-230 kPa (22-33 psi)1090-1440 kPa (158-209 psi)10°C (50°F)
Above 40%170-256 kPa (24-37 psi)1230-1570 kPa (179-228 psi)12°C (54°F)
25-29°C (76-85°F)Below 35%173-247 kPa (25-36 psi)1270-1530 kPa (184-222 psi)12°C (54°F)
35% to 50%186-257 kPa (27-37 psi)1340-1570 kPa (194-228 psi)13°C (55°F)
Above 50%196-278 kPa (28-40 psi)1390-1630 kPa (202-237 psi)14°C (57°F)
30-35°C (86-95°F)Below 30%194-269 kPa (28-39 psi)1410-1660 kPa (205-241 psi)14°C (57°F)
30% to 50%204-283 kPa (30-41 psi)1440-1680 kPa (209-244 psi)15°C (56°F)
Above 50%217-303 kPa (31-44 psi)1490-1700 kPa (216-247 psi)17°C (63°F)
36-41°C (96-105°F)Below 20%216-288 kPa (31-42 psi)1570-1810 kPa (228-263 psi)16°C (61°F)
20% to 40%223-301 kPa (32-44 psi)1580-1800 kPa (229-261 psi)17°C (63°F)
Above 40%236-315 kPa (34-46 psi)1590-1790 kPa (231-260 psi)18°C (64°F)
42-46°C (106-115°F)Below 20%241-309 kPa (35-45 psi)1740-1940 kPa (253-282 psi)18°C (64°F)
Above 20%248-322 kPa (36-47 psi)1730-1910 kPa (251-277 psi)19°C (66°F)
47-49°C (116-120°F)Below 30%269-328 kPa (39-48 psi)1860-2000 kPa (270-290 psi)20°C (61°F)

A/C Performance Table (LA3, LY9)

Ambient Air TemperatureRelative HumidityService Port PressureMaximum Left Center Discharge Air Temperature
Low SideHigh Side
13-18°C (55-65°F)0-100%150-212 kPa (22-31 psi)990-1730 kPa (144-251 psi)8°C (46°F)
19-24°C (66-75°F)Below 40%150-214 kPa (22-31 psi)890-1560 kPa (129-226 psi)8°C (46°F)
Above 40%152-234 kPa (22-34 psi)1210-1840 kPa (176-267 psi)10°C (50°F)
25-29°C (76-85°F)Below 35%162-231 kPa (24-34 psi)1310-1760 kPa (190-255 psi)10°C (50°F)
35-50%172-235 kPa (25-34 psi)1440-1820 kPa (209-264 psi)10°C (50°F)
Above 50%179-244 kPa (28-40 psi)1550-1930 kPa (225-280 psi)11°C (52°F)
30-35°C (86-95°F)Below 30%186-254 kPa (27-37 psi)1610-2050 kPa (234-298 psi)12°C (54°F)
30-50%190-255 kPa (28-37 psi)1670-2050 kPa (242-298 psi)12°C (54°F)
Above 50%195-256 kPa (28-37 psi)1740-2040 kPa (253-296 psi)13°C (55°F)
36-41°C (96-105°F)Below 20%214-281 kPa (31-41 psi)1980-2400 kPa (287-348 psi)14°C (57°F)
20-40%214-277 kPa (31-40 psi)1980-2320 kPa (287-337 psi)14°C (57°F)
Above 40%215-272 kPa (31-39 psi)1970-2230 kPa (286-324 psi)15°C (59°F)
42-46°C (106-115°F)Below 20%243-303 kPa (35-44 psi)2360-2690 kPa (343-390 psi)17°C (63°F)
Above 20%241-295 kPa (35-43 psi)2320-2540 kPa (337-369 psi)16°C (61°F)
47-49°C (116-120°F)Below 30%263-311 kPa (38-45 psi)2610-2770 kPa (379-402 psi)18°C (64°F)

A/C Performance Table (LS6)

Air Conditioning (A/C) Diagnostics - Pressure Zone A

StepActionYesNo
DEFINITION: The high and low side pressures may be normal or slightly less than normal. Air Delivery Concern Slight Refrigerant Under Charge Refrigerant Contamination
1Were you sent here from the A/C System Performance Test?Go to Step 2Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
2Did the customer mention that the A/C system output temperatures are good at first, but then turn warm during extended drives?Go to Step 3Go to Step 4
3Increase engine speed to 1500 RPM. During extended operation of the A/C system, does the low side pressure decrease?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone DGo to Step 4
4Refer to the pressures recorded during the A/C system performance test. CAUTION: Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices. Inspect for the following conditions: The high side pressure is slightly greater than the specified pressure ranges in the A/C System performance Table but still near Zone A on the A/C Pressure-Zone Classification Chart. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The discharge line is hot. The suction line is cool. Do the listed conditions exist?Go to Step 7Go to Step 5
5Refer to the pressures recorded during the A/C system performance test. Inspect for the following conditions: The low side pressure is slightly lower than the specified pressure ranges but still near Zone A on the A/C Pressure-Zone Classification Chart. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The discharge line is warm-to-hot. The suction line is cool-to-warm. Do the listed conditions exist?Go to Step 6Go to Too Hot in Vehicle in HVAC Systems - Automatic
6The A/C system may be undercharged. Leak test the A/C system. Refer to Leak Testing . Evacuate and Recharge the A/C system to specifications. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 11
7The A/C system may be contaminated. View the J 43600 ACR 2000 Air Conditioning Service Center information screen for detection of foreign gases in the A/C system. See Special Tools and Equipment . Do foreign gases exist?Go to Step 8Go to Step 9
8Evacuate the A/C system to a scavenging tank. Refer to Refrigerant Recovery and Recharging . Recharge the A/C system to specifications. Is the repair complete?Go to Step 11
9The A/C system may contain too much moisture or air. Evacuate and recharge the A/C system to specifications. Refer to Refrigerant Recovery and Recharging . Operate the A/C system and inspect the panel outlet air temperatures. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . Are the panel outlet temperatures within the specified ranges of the A/C Performance Test Table?Go to Step 11Go to Step 10
10Record the low and high side pressures and the IP panel outlet air temperature. Compare the panel outlet temperatures and pressure to those listed in the A/C System Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . Are the high and low side pressures and IP panel outlet temperatures within specifications?Go to Step 11Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
11Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Symptoms - HVAC Systems - Automatic
CAUTION
Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices.

Air Conditioning (A/C) Diagnostics - Pressure Zone A

Air Conditioning (A/C) Diagnostics - Pressure Zone B

StepActionValueYesNo
DEFINITION: The low side pressures is higher thannormal and the high side pressure is lower than normal. Malfunctioning A/C Compressor Refrigerant Under Charge
1Were you sent here from the A/C System Performance Test?Go to Step 2Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
2Refer to the pressures recorded during the A/C System Performance Test. Inspect for the following conditions: CAUTION: Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices. The low side pressure is greater than the specified pressure range of the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The high side pressure is less than the specified pressure range of the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The low side refrigerant line at the compressor feels cool-to-cold. The high side refrigerant line at the compressor feels warm-to-hot. Do the listed conditions exist?Go to Step 3Go to Step 7
3The A/C system may be undercharged or have compressor or expansion valve problems. Leak test the A/C system. Refer to Leak Testing . Note any potential leaks for later repair. Recover the refrigerant charge from the vehicle. Refer to Refrigerant Recovery and Recharging . Record the weight of the recovered refrigerant. Is the recovered amount below the specified values?0.45 kg (1.0 lbs)Go to Step 4Go to Step 6
4The system is low on refrigerant charge. Repair any leaks noted in step 3 above. Evacuate and Recharge the A/C system to specifications. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 5
5Record the low and the high side pressures and the I/P panel outlet temperatures. Refer to step 2 of the Air Conditioning (A/C) system performance test. Compare the panel outlet temperatures and pressures to those listed in the A/C System Performance Chart. Are the high and low side pressures and I/P panel outlet temperatures within specification?System OKGo to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
6The thermal expansion valve needs to be replaced. Replace the thermal expansion valve. Refer to Thermal Expansion Valve Replacement . Repair any leaks noted in step 3 above. Evacuate and Recharge the A/C system to specifications. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 5
7Refer to the pressures recorded during the A/C System Performance Test. Inspect for the following conditions: CAUTION: Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices. The low side pressure is greater than the specified pressure range of the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The high side pressure is less than the specified pressure range of the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . The low side refrigerant line at the compressor feels warm. The high side refrigerant line at the compressor feels warm to hot. Do the listed conditions exist?Go to Step 8Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
8The system could be low charged or there could be a problem with the A/C compressor. Verify that the compressor is engaging properly. Verify that the A/C system performance data was taken with the compressor clutch engaged for more than 10 seconds. Raise the engine RPM to 1,200. Record the low and high side pressures and the I/P panel outlet temperatures. Refer to step 2 of the Air Conditioning (A/C) system performance test. Compare the panel outlet temperatures and pressures to those listed in the A/C System Performance Chart. Are the high and low side pressures and I/P panel outlet temperatures within specification?Go to Step 3Go to Step 9
9With the engine speed raised to over 2,000 RPM and the A/C compressor clutch engaged, listen for any unusual compressor noises. Any unusual noises heard?Go to Step 3Go to Step 10
10Replace the A/C compressor. Refer to Compressor Replacement (RHD) , Compressor Replacement (LHD) , Compressor Replacement (LHD, LY7) or Compressor Replacement (LS6) . Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 11
11Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Automatic
CAUTION
Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices.
CAUTION
Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices.

Air Conditioning (A/C) Diagnostics - Pressure Zone B

Air Conditioning (A/C) Diagnostics - Pressure Zone C

StepActionYesNo
DEFINITION: The low and high side pressures are both higher than normal. Restricted Condenser Air Flow Cooling Fan Malfunction Expansion Device Malfunction
1Were you sent here from the A/C System Performance Test?Go to Step 2Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
2Start the engine. Make sure that the A/C is on. Inspect for proper cooling fan operation. Refer to Cooling System Description and Operation in Engine Cooling. Are the cooling fans ON and operating properly?Go to Step 3Go to Step 5
3Visually inspect for the following conditions: Damaged condenser cooling fins Missing or misaligned air baffles Restricted front end air flow Do any of these conditions exist?Go to Step 4Go to Step 6
4Repair the air flow restriction. Is the repair complete?Go to Step 7
5Repair the fault to the cooling fan operation. Refer to Cooling Fan Inoperative in Engine Cooling. Is the repair complete?Go to Step 7
6Air is in the refrigerant system, or the system is overcharged. Refer to the view screen on J 43600 ACR 2000 Air Conditioning Service Center for foreign gas content in the refrigerant. See Special Tools and Equipment . Recover and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 7
7Record the low and high side pressures and the IP panel outlet air temperature after you have performed the repairs. Compare the pressures and the panel outlet temperature to those listed in the A/C Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . Are the readings within the specified ranges listed in the A/C Performance table?Go to Step 8Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
8Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Automatic

Air Conditioning (A/C) Diagnostics - Pressure Zone C

Air Conditioning (A/C) Diagnostics - Pressure Zone D

StepActionValueYesNo
DEFINITION: The low side pressure is lower than normal and the high side pressure is higher than normal. A restriction in the A/C system Debris in the system
1Were you sent here from the A/C System Performance Test?Go to Step 2Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
2CAUTION: Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices. Feel the liquid line at the front of dash.Is the liquid line cold at the front of dash?Go to Step 3Go to Step 8
3Feel along the surface of the liquid line between the condenser and the front of dash. Did you detect an abrupt drop in temperature along the surface?Go to Step 5Go to Step 4
4Feel along the surfaces of the following low side components: The evaporator outlet tube between the front of dash and the compressor suction hose The compressor suction hose to the compressor. Did you feel an abrupt temperature change along the surfaces of any of the listed components?Go to Step 5Go to Step 6
5Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Remove the restriction from the component, or replace the component which produced an abrupt temperature drop. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the repair complete?Go to Step 13
6The system may be low charged. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Record the weight of the recovered refrigerant. Is the weight of the recovered refrigerant charge greater then the specified value?0.45 kg (1.0 lbs)Go to Step 7Go to Step 10
7The expansion device may be restricted or failed. Remove the expansion device. Refer to Thermal Expansion Valve Replacement . Check the expansion device for a large amount residue at the inlet. Did you notice a residue at the inlet to the expansion device?Go to Step 8Go to Step 11
8The desiccant bag in the receiver portion of the condenser may have failed. Remove the desiccant bag from the condenser. Refer to Desiccant Bag Replacement . Check to see if the bag was broken. Was the bag broken or leaking?Go to Step 9Go to Step 12
9Flush the A/C system. Refer to Flushing . Replace the condenser. Refer to Condenser Replacement (MAE) Condenser Replacement (CZ3) or Condenser Replacement (LS6) . Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the repairs complete?Go to Step 13
10Leak test the system. Refer to Leak Testing . Repair any leaks found. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the repairs complete?Go to Step 13
11Replace the expansion device. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the repairs complete?Go to Step 13
12Replace the desiccant bag with a new unit. Replace the expansion device. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the repairs complete?Go to Step 13
13Record the low and the high side pressures and the panel outlet air temperature. Compare the pressures and the panel outlet temperature to those listed in the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6) . Are the readings within the specified ranges as shown on the A/C performance Table.Go to Step 14Go to Air Conditioning (A/C) System Performance Test (w/o LS6) or Air Conditioning (A/C) System Performance Test (w/ LS6)
14Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Automatic
CAUTION
Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices.

Air Conditioning (A/C) Diagnostics - Pressure Zone D

Heating Performance Diagnostic (LS6)

StepActionYesNo
DEFINITION: Heating system performance
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Too Cold in Vehicle in HVAC System- Automatic
2Start the engine. Allow the engine to idle. Does the engine reach a normal operating temperature?Go to Step 3Go to Step 15
3Disconnect the vacuum hose from the hot water bypass valve. Is vacuum being applied to the valve?Go to Step 4Go to Step 13
4Remove the hot water bypass valve. Refer to Coolant Bypass Valve Replacement . Inspect the hot water bypass valve for the following conditions: Binding Restrictions Damage Are any of the listed conditions present?Go to Step 12Go to Step 5
5Install the hot water bypass valve. Refer to Coolant Bypass Valve Replacement . Is the action complete?Go to Step 6
6Allow the engine to idle. Select the FLOOR mode. Select the minimum blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet hoses to the heater core. Does the heater inlet hose feel warmer than the outlet hose?Go to Step 10Go to Step 7
7Install a thermometer into the I/P panel center air outlet. Secure a thermometer to the heater core outlet hose. Select the panel mode. Select the maximum blower speed. Select the maximum temperature setting. Record the temperature at the following locations: The IP panel center air outlet The heater core outlet hose Compare the recorded temperatures. Are the temperature readings similar?Go to Step 8Go to Step 9
8Inspect the following areas of the vehicle for cold air leaks: The cowl The recirculation door The HVAC module case Perform the necessary repairs. Are the repairs complete?Go to Step 15
9Inspect the temperature door operation. Refer to Diagnostic System Check - HVAC Systems - Automatic . Perform any necessary repairs. Is the repair complete?Go to Step 15
10Turn OFF the engine. Backflush the heater core. Refer to Flushing in Engine Cooling. Start the engine and allow to idle. Select the FLOOR mode. Select the minimum blower speed. Select the maximum temperature setting. Feel the temperature of the inlet and outlet hoses at the heater core. Does the inlet hose feel warmer than the outlet hose?Go to Step 11Go to Step 15
11Replace the heater core. Refer to Heater Core Replacement . Is the repair complete?Go to Step 15
12Replace the hot water bypass valve. Refer to Coolant Bypass Valve Replacement . Is the repair complete?Go to Step 15
13Repair the vacuum condition. Is the repair complete?Go to Step 15
14Repair the low engine temperature concern. Refer to Engine Fails To Reach Normal Operating Temperature (LY7, LS6) or Engine Fails To Reach Normal Operating Temperature (LA3, LY9) in Engine Cooling. Is the repair complete?Go to Step 15
15Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 2

Heating Performance Diagnostic (LS6)

Heating Performance Diagnostic (LY7)

StepActionYesNo
DEFINITION: Heating system performance.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go Too Cold in Vehicle
2Start the engine. Allow the engine to idle. Does the engine reach a normal operating temperature?Go to Step 3Go to Step 9
3CAUTION: Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices. Allow the engine to idle. Select the FLOOR mode. Select the minimum blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose?Go to Step 7Go to Step 4
4Install a thermometer into the center IP PANEL air outlet. Secure a thermometer to the heater core outlet hose. Select the PANEL mode. Select the maximum blower speed. Select the warmest temperature setting. Record the temperature at the following locations: The center IP PANEL air outlet The heater core outlet hose Compare the recorded temperatures. Are the two temperature readings about equal?Go to Step 5Go to Step 6
5Inspect and repair the following areas of the vehicle for cold air leaks: The cowl The recirculation door The HVAC module case Perform the necessary repairs. Are the repairs complete?Go to Step 10
6Inspect the temperature door operation. Refer to in Computer/Integrating Systems for replacement, setup and programming. Perform any necessary repairs. Are the repairs complete?Go to Step 10
7Turn OFF the engine. Backflush the heater core. Start the engine. Select the FLOOR mode. Select the minimum blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose?Go to Step 8Go to Step 10
8Replace the heater core. Is the repair complete?Go to Step 10
9Repair the low engine temperature concern. Refer to in Engine Cooling. Is the repair complete?Go to Step 10
10Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 2
CAUTION
Refer to Moving Parts and Hot Surfaces Caution in Cautions and Notices.

Heating Performance Diagnostic (LY7)

Noise Diagnosis - Blower Motor

StepActionYesNo
DEFINITION: Noise originating from the blower motor.
1Were you sent here from the HVAC Symptoms?Go to Step 2Go to Diagnostic System Check - HVAC Systems - Automatic
2Sit inside the vehicle. Close the vehicle doors and windows. Turn ON the ignition, with the engine OFF. Cycle the blower motor through all of the speeds in order to determine where and when the noise occurs. Did you hear a noise during the blower operation?Go to Step 3Go to Step 10
3Does the noise vary with the blower speed?Go to Step 4Go to Step 10
4Inspect for excessive vibration at each blower motor speed by feeling the blower case. Is excess vibration present?Go to Step 5Go to Step 6
5IMPORTANT: Inspect the blower motor impeller cavity through the access hole under the passenger compartment air filter. Examine the blower motor cavity for deposits of foreign material.Did you find foreign material?Go to Step 7Go to Step 6
6Remove the blower motor. Refer to Blower Motor Replacement (LHD) or Blower Motor Replacement (RHD) . Inspect the blower motor for the following conditions: Cracked blades A loose impeller retainer Improper impeller alignment Did you find any of these conditions?Go to Step 8Go to Step 10
7Remove the foreign material. Is the action complete?Go to Step 10
8Replace the blower motor. Refer to Blower Motor Replacement (LHD) or Blower Motor Replacement (RHD) . Is the replacement complete?Go to Step 10
9Install the blower motor. Refer to Blower Motor Replacement (LHD) or Blower Motor Replacement (RHD) . Is the action complete?Go to Step 10
10Operate the system in order to verify the repair. Does the system operate correctly?System OKGo to Step 2
IMPORTANT
Inspect the blower motor impeller cavity through the access hole under the passenger compartment air filter.

Noise Diagnosis - Blower Motor

Noise Diagnosis - Air Conditioning (A/C) System

StepActionYesNo
DEFINITION: Noise Originating from the A/C compressor, drive belt or the A/C lines.
1Were you sent here from HVAC Symptoms or another diagnostic table?Go to Step 2Go to Diagnostic System Check - HVAC Systems - Automatic
2A/C system noises can be generally categorized into three areas: Screeching, Squealing, Chirping noises Moaning noises Vibration/Rattle noises Start the engine. Ensure that the A/C is ON. Do you hear a screeching, squealing noise when you engage the A/C?Go to Step 3Go to Step 9
3With the engine OFF, inspect the drive belt for excessive wear. Refer to Drive Belt Excessive Wear Diagnosis in Engine Mechanical-2.6L and 3.2L or to Drive Belt Excessive Wear Diagnosis in Engine Mechanical-3.6L. Is the drive belt excessively worn?Go to Step 18Go to Step 4
4Inspect the drive belt tension. Refer to Drive Belt Tensioner Diagnosis in Engine Mechanical-2.6L and 3.2L or to Drive Belt Tensioner Diagnosis in Engine Mechanical-3.6L. Is the drive belt tension correct?Go to Step 19Go to Step 5
5Inspect the drive belt for excessive oil coverage. Is the drive belt covered with oil?Go to Step 17Go to Step 6
6Start the engine. Ensure that the A/C is ON. Inspect the compressor and the clutch. Is the compressor locked up?Go to Step 23Go to Step 7
7Is the A/C compressor clutch slipping?Go to Step 23Go to Step 8
8Using a stethoscope, listen to the A/C compressor for any abnormal noises. Is the compressor causing an abnormal noise?Go to Step 15Go to Step 10
9Does a moaning noise exist when the A/C clutch is engaged?Go to Step 10Go to Step 12
10Listen to the A/C compressor components and mounting for noise concerns using a stethoscope. Are any of these components loose, damaged or excessively worn?Go to Step 20Go to Step 11
11Start the engine. Engage the A/C compressor clutch. Using a stethoscope, move around the entire refrigerant plumbing system, listening for any abnormal noises caused by component ground-out. Are any of the A/C components grounding out and causing a noise?Go to Step 22Go to Step 13
12Does a vibration or rattle noise exist when the A/C clutch is engaged?Go to Step 13Go to Step 14
13Does the noise stop when the A/C clutch is disengaged?Go to Step 15Go to Step 14
14Idle the engine in PARK with the A/C compressor clutch engaged. Using a stethoscope, move around the entire A/C system listening for any abnormal noises caused by a component. Do any of the A/C components cause an abnormal noise?Go to Step 21Go to Step 24
15Verify that the A/C system is properly charged. Refer to Refrigerant System Capacities . Is the A/C system properly charged?Go to Step 24Go to Step 16
16Recharge the A/C system to specification. Refer to Refrigerant Recovery and Recharging . Is the abnormal compressor noise still present?Go to Step 24Go to Step 25
17Repair the oil leak. Refer to the appropriate repair procedure in Engine Mechanical. Is the repair complete?Go to Step 25
18Replace the drive belt. Refer to the following procedures: Drive Belt Replacement in Engine Mechanical-2.6L and 3.2L Drive Belt Replacement - Generator and Water Pump in Engine Mechanical-3.6L Drive Belt Replacement - Power Steering and Air Conditioning in Engine Mechanical-3.6L Is the replacement complete?Go to Step 25
19Replace the drive belt tensioner. Refer to the following procedures: Drive Belt Tensioner Replacement in Engine Mechanical-2.6L and 3.2L Drive Belt Tensioner Replacement - Generator and Water Pump in Engine Mechanical-3.6L Drive Belt Tensioner Replacement - Power Steering and Air Conditioning in Engine Mechanical-3.6L Is the replacement complete?Go to Step 25
20Repair or replace the A/C compressor mounting component. Is the repair complete?Go to Step 25
21Repair or replace the component which is causing the moaning concern as needed. Is the repair complete?Go to Step 25
22Correctly route or insulate the A/C component. Is the repair complete?Go to Step 25
23Replace the A/C compressor. Refer to Compressor Replacement (RHD) , Compressor Replacement (LHD) , Compressor Replacement (LHD, LY7) or Compressor Replacement (LS6) . Is the replacement complete?Go to Step 25
24The concern may be caused by an engine related component. Refer to Drive Belt Vibration Diagnosis in Engine Mechanical-2.6L and 3.2L or to Drive Belt Vibration Diagnosis in Engine Mechanical-3.6L. Did you find and correct the condition?Go to Step 25
25Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 2

Noise Diagnosis - Air Conditioning (A/C) System

Noise Diagnosis - HVAC Module

StepActionYesNo
DEFINITION: Noise originating from the HVAC module.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Automatic in HVAC Automatic.
2Start the engine. Cycle through all of the following: Blower motor speeds HVAC modes Temperature control settings Determine the type of noise: Scrape, pop Tick/click, chirp or groaning Air rush/whistle Is a scrape or pop noise evident when selecting modes or temperature settings?Go to Step 6Go to Step 3
3Is a tick/click, chirping, groaning or scraping noise present, but decreases as blower motor speed is decreased?Go to Step 6Go to Step 4
4Is an air rush/whistle noise evident in all modes but not all temperature settings?Go to Step 6Go to Step 5
5Is an air rush/whistle noise evident only in defrost or floor mode?Go to Step 6Go to Step 6
6Remove the IP carrier. Refer to Instrument Panel (I/P) Retainer Replacement in Instrument Panel, Gages and Console. Is the action complete?Go to Step 7
7Inspect the air flow doors for proper operation. Inspect the ducts for obstructions or foreign materials. Were any of these conditions found?Go to Step 10Go to Step 8
8Inspect the mode and temperature doors and seals for warping or cracking. Are the doors in normal condition?Go to Step 11Go to Step 9
9Replace the appropriate door and/or seals. Is the repair complete?Go to Step 11
10Remove any obstructions or foreign material found. Is the action complete?Go to Step 11
11Install the IP carrier. Refer to Instrument Panel (I/P) Retainer Replacement in Instrument Panel, Gages and Console. Is the action complete?Go to Step 12
12Operate the system to verify the repair. Did you find and correct the condition?System OKGo to Step 2

Noise Diagnosis - HVAC Module

Odor Diagnosis

StepActionYesNo
DEFINITION: Odor originating or noticed through the HVAC system.
1Sit inside the vehicle. Close all of the doors and windows. Start the engine. Allow the engine idle at normal operating temperature. Select the maximum blower speed. Select the panel air outlet mode. Select the coldest temperature setting. Cycle through all of the blower speeds, modes and temperatures to define what type of odor is present. Musty smell Coolant smell Oil smell Does the odor have a musty smell?Go to Step 2Go to Step 8
2Inspect the HVAC filter for debris. Is the HVAC filter clean of debris?Go to Step 3Go to Step 4
3Inspect the passenger compartment filter assembly for proper installation and sealing. Is the filter assembly installed properly?Go to Step 4Go to Passenger Compartment Air Filter Housing Replacement
4Remove passenger compartment air filter and shake off excessive dust. Refer to Passenger Compartment Air Filter Replacement . Is the action complete?Go to Step 5
5Inspect for wet carpeting. Is the carpet wet?Go to Step 6Go to Step 15
6Inspect for the following conditions: Water leaks around the windshield Blockage of the HVAC module drain Leaks around the door seals Blockage of the plenum drain Is a leak present?Go to Step 7Go to Step 15
7Repair the leak as necessary. Is the repair complete?Go to Step 16Go to Step 8
8Does the odor have a coolant smell?Go to Step 9Go to Step 13
9Inspect the cooling system for leaks. Refer to Loss of Coolant (M 35) , Loss of Coolant (M 82) in Engine Cooling. Is a leak present in the engine compartment?Go to Step 10Go to Step 11
10Repair the coolant leak as necessary. Is the repair complete?Go to Step 16
11Inspect for coolant leaking inside the vehicle or for a film build-up on the windshield. Is the condition present?Go to Step 12Go to Step 16
12Replace the heater core. Refer to Heater Core Replacement . Is the repair complete?Go to Step 16
13Does the odor have an oily smell?Go to Step 13Go to Step 16
14Inspect the engine compartment for any leaks. Refer to the following procedures: Coolant in Engine Oil in Engine Mechanical-2.6L and 3.2L. Coolant in Engine Oil in Engine Mechanical-3.6L. Fluid Leak Diagnosis in Automatic Transmission-5L40-E Power Steering Fluid Leaks in Power Steering System Repair any oil leaks. Is the repair complete?Go to Step 16
15A musty odor can be caused by mold or mildew build up on the evaporator or the heater core or inside of the HVAC module. Refer to Odor Correction . Is the action complete?Go to Step 16
16Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 1

Odor Diagnosis

Eliminating Air Conditioning Odor

Odors may be emitted from the air conditioning system primarily at start up in hot, humid climates. The following conditions may cause the odor

  1. Debris is present in the HVAC module.
  2. Microbial growth on the evaporator core

When the blower motor fan is turned on, the microbial growth may release an unpleasant musty odor into the passenger compartment. To remove odors of this type, the microbial growth must be eliminated. Perform the following procedure

Deodorize the evaporator core using Deodorizing Aerosol Kit.

Perform the following steps in order to deodorize the A/C system

  1. Ensure that the plenum that draws outside air into the HVAC module is clear of debris.
  2. Disable the A/C compressor clutch operation by disconnecting the clutch coil electrical connector.
  3. Dry the evaporator core by performing the following steps: Start the engine. Select the maximum temperature setting. Select the recirculation mode. Run the blower motor on high for 10 minutes.
  4. Locate an area in the air conditioning duct between the blower motor and the evaporator core downstream of the blower motor.
  5. Drill a 3.175 mm (0.125 in) hole where the hole will not interfere with or damage the following components: The blower motor The evaporator core Any other operating part the of system
  6. Wear safety goggles and latex gloves in order to perform the following actions: Select the maximum blower speed. Insert the deodorizer extension tube into the hole to the mark on the extension tube. Use short spray bursts and vary the direction of spray for a 2-3 minute period of time.
  7. Shut the engine OFF. Allow the vehicle to sit for 3-5 minutes.
  8. Seal the 3.175 mm (0.125 in) hole with body sealer or RTV gasket compound.
  9. Start the engine.
  10. Operate the blower motor on high for 15-20 minutes to dry.
  11. Reconnect the A/C compressor clutch coil electrical connector.
  12. Verify proper clutch operation.
  13. Using the scan tool enable the afterblow. Refer to «Afterblow Enable Procedure»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#hvac-systems-automatic__afterblow-enable-procedure) in HVAC Automatic.

Refrigerant Recovery and Recharging

Tools Required

  1. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45037 A/C Oil Injector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
CAUTIONAvoid breathing the A/C Refrigerant 134a (R-134a) and the lubricant vapor or the mist. Exposure may irritate the eyes, nose, and throat. Work in a well ventilated area. In order to remove R-134a from the A/C system, use service equipment that is certified to meet the requirements of SAE J 2210 (R-134a recycling equipment). If an accidental system discharge occurs, ventilate the work area before continuing service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.
CAUTIONFor personal protection, goggles and gloves should be worn and a clean cloth wrapped around fittings, valves, and connections when doing work that includes opening the refrigerant system. If R-134a comes in contact with any part of the body severe frostbite and personal injury can result. The exposed area should be flushed immediately with cold water and prompt medical help should be obtained.

Note. R-134a is the only approved refrigerant for use in this vehicle. The use of any other refrigerant may result in poor system performance or component failure.

Note. To avoid system damage use only R-134a dedicated tools when servicing the A/C system.

Note. Use only Polyalkylene Glycol Synthetic Refrigerant Oil (PAG) for internal circulation through the R-134a A/C system and only 525 viscosity mineral oil on fitting threads and O-rings. If lubricants other than those specified are used, compressor failure and/or fitting seizure may result.

Note. R-12 refrigerant and R-134a refrigerant must never be mixed, even in the smallest of amounts, as they are incompatible with each other. If the refrigerants are mixed, compressor failure is likely to occur. Refer to the manufacturer instructions included with the service equipment before servicing.

The J 43600 is a complete air conditioning service center for R-134a. See Special Tools and Equipment . The ACR 2000 recovers, recycles, evacuates and recharges A/C refrigerant quickly, accurately and automatically. The unit has a display screen that contains the function controls and displays prompts that will lead the technician through the recover, recycle, evacuate and recharge operations. R-134a is recovered into and charged out of an internal storage vessel. The ACR 2000 automatically replenishes this vessel from an external source tank in order to maintain a constant 5.45-6.82 kg (12-15 lbs) of A/C refrigerant.

The ACR 2000 has a built in A/C refrigerant identifier that will test for contamination, prior to recovery and will notify the technician if there are foreign gases present in the A/C system. If foreign gases are present, the ACR 2000 will not recover the refrigerant from the A/C system.

The ACR 2000 also features automatic air purge, single pass recycling and an automatic oil drain.

Refer to the J 43600 ACR 2000 manual for operation and setup instruction. See Special Tools and Equipment . Always recharge the A/C System with the proper amount of R-134a. Refer to Refrigerant System Capacities for the correct amount.

A/C Refrigerant System Oil Charge Replenishing

If oil was removed from the A/C system during the recovery process or due to component replacement, the oil must be replenished. Oil can be injected into a charged system using J 45037 . See Special Tools and Equipment . For the proper quantities of oil to add to the A/C refrigerant system, refer to Refrigerant System Capacities .

Flushing

Tools Required

  1. J 43600 Air Conditioning Service Center. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45268 Flush Adapter Kit. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. J 41447 Leak Detection Dye
  4. J 42220 Universal 12V Leak Detection Lamp. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
IMPORTANTFlushing is not intended to remove metal from the A/C system.

Flushing is intended to remove the following

  1. Contaminated PAG oil
  2. Desiccant, following a desiccant bag failure
  3. Overcharge of PAG oil
  4. Refrigerant contamination
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the TXV. Refer to «Thermal Expansion Valve Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. Install the J 45268-110.
  4. Remove the compressor. Refer to «Compressor Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Compressor Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Compressor Replacement (LHD, LY7)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) and «Compressor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Install the J 45268-12 to the discharge hose.
  6. Install the J 45268-13 to the suction hose.
  7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure: IMPORTANT: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter. Service the filter with ACDelco P/N GF 470, before each flush. Connect the J 45268-1 flush filter to the suction port of the J 45268-3 flush adapter. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Connect the red hose from the J 43600 to the J 45268-3 flush adapter. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace the desiccant bag when the A/C flush is complete and perform the following procedure: IMPORTANT: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter. Service the filter with ACDelco P/N GF 470, before each flush. Connect J 45268-1 flush filter to the discharge port of the J 45268-3 flush adapter. Replace the desiccant bag. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Connect the red hose from the J 43600 to the suction port of the J 45268-3 flush adapter. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  9. Flush the A/C system. Follow the instructions supplied with the J 43600 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Close the valve on the external refrigerant tank, before starting the flush process.
  10. Remove the J 45268-13 from the suction hose.
  11. Remove the J 45268-12 from the discharge hose.
  12. Remove the J 45268-1 from the J 43600 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  13. Drain the PAG oil from the A/C compressor, through the suction and discharge ports.
  14. Add one bottle of J 41447 to the A/C compressor.
  15. Install the compressor. Refer to «Compressor Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Compressor Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Compressor Replacement (LHD, LY7)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) and «Compressor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  16. Remove the J 45268-110.
  17. Inspect the TXV for debris. Clean or replace as needed.
  18. Install the TXV. Refer to «Thermal Expansion Valve Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  19. Replace the desiccant bag. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  20. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  21. Add the total system capacity of PAG oil to the A/C system. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  22. Leak test the fittings using the J 42220 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Draining

  1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container. Rotate the compressor shaft to assist in draining the compressor.
  2. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
  3. Properly discard the used refrigerant oil.

Balancing

  1. The replacement compressor is shipped with the total system capacity of refrigerant oil.
  2. Before installing the compressor, the refrigerant oil will have to be partially drained: Refer to the amount of refrigerant oil recorded during the compressor removal. Subtract the amount recorded from the total system capacity. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) . The difference between the total system capacity and the recorded amount is the calculated amount to be drained from the replacement compressor.
  3. Drain the calculated amount of refrigerant oil from the replacement compressor.

Tools Required

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

Removal Procedure

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the drive belt. Refer to «Drive Belt Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) in Engine Mechanical - 2.6L and Engine Mechanical - 3.2L.
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  4. Partially remove the intake air resonator and reposition for compressor clearance. Refer to «Intake Air Resonator Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  5. Remove the suction line bolt (1) at the compressor.
  6. Remove the discharge line bolt (2) at the compressor.
  7. Disconnect the A/C lines from the compressor.
  8. Remove and discard the O-ring seals.
  9. Remove the nut (1) retaining the power steering line to the compressor stud.
  10. Remove the clip and line from the compressor stud.
  11. Remove the nut (1) retaining the power steering cooler line to the compressor stud.
  12. Remove the clip (1) and line from the compressor stud (2).
  13. Remove the front lower compressor stud (3).
  14. Remove the front upper compressor stud.
  15. Remove the rear compressor stud (1).
  16. Disconnect the electrical connector from the compressor.
  17. Rotate the compressor and remove from the vehicle.
  18. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
  19. If you are replacing the compressor, balance the compressor oil. Refer to «Compressor Oil Balancing»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Installation Procedure

  1. Install the compressor.
  2. Connect the electrical connector.
  3. Install all compressor mounting studs finger tight.
  4. Tighten the compressor lower rear stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  5. Tighten the front lower compressor stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  6. Tighten the front upper compressor stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  7. Install the power steering line and bracket to lower compressor stud.
  8. Install the power steering line nut (1). Tighten: Tighten the nut to 8 N.m (71 lb in).
  9. Install the power steering line and clamp to rear compressor stud.
  10. Install the power steering line retainer nut (1). Tighten: Tighten the nut to 8 N.m (71 lb in).
  11. Install new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  12. Connect the suction line to the compressor.
  13. Connect the discharge line to the compressor.
  14. Install the compressor AC line bolts (1,2). Tighten: Tighten the bolts to 9.8 N.m (87 lb in).
  15. Reposition intake air resonator and install. Refer to «Intake Air Resonator Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  16. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  17. Install the engine drive belt. Refer to «Drive Belt Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) in Engine Mechanical - 2.6L and Engine Mechanical - 3.2L.
  18. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  19. Leak test the fitting of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the drive belt. Refer to «Drive Belt Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) in Engine Mechanical - 2.6L and Engine Mechanical - 3.2L.
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  4. Partially remove the intake air resonator and reposition for compressor clearance. Refer to «Intake Air Resonator Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - .2L.
  5. Remove the suction line bolt (1) at the compressor.
  6. Remove the discharge line bolt (2) at the compressor.
  7. Disconnect the A/C lines from the compressor.
  8. Remove and discard the O-ring seals.
  9. Remove the nut (1) retaining the power steering line to the compressor stud.
  10. Remove the clip and line from the compressor stud.
  11. Remove the nut (1) retaining the power steering cooler line to the compressor stud.
  12. Remove the clip (1) and line from the compressor stud (2).
  13. Remove the front lower compressor stud (3).
  14. Remove the front upper compressor stud.
  15. Remove the rear compressor stud (1).
  16. Disconnect the electrical connector from the compressor.
  17. Rotate the compressor and remove from the vehicle.
  18. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
  19. If you are replacing the compressor, balance the compressor oil. Refer to «Compressor Oil Balancing»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Install the compressor.
  2. Connect the electrical connector.
  3. Install all compressor mounting studs finger tight.
  4. Tighten the compressor lower rear stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  5. Tighten the front lower compressor stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  6. Tighten the front upper compressor stud (1). Tighten: Tighten the stud to 25 N.m (18 lb ft).
  7. Install the power steering line and bracket to lower compressor stud.
  8. Install the power steering line nut (1). Tighten: Tighten the nut to 8 N.m (71 lb in).
  9. Install the power steering line and clamp to rear compressor stud.
  10. Install the power steering line retainer nut (1). Tighten: Tighten the nut to 8 N.m (71 lb in).
  11. Install new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  12. Connect the suction line to the compressor.
  13. Connect the discharge line to the compressor
  14. Install the compressor AC line bolts (1,2). Tighten: Tighten the bolts to 9.8 N.m (87 lb in).
  15. Reposition intake air resonator and install. Refer to «Intake Air Resonator Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  16. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and Engine Controls - 3.2L.
  17. Install the engine drive belt. Refer to «Drive Belt Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) in Engine Mechanical - 2.6L and Engine Mechanical - 3.2L.
  18. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  19. Leak test the fitting of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the drive belt. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-36l-ly7-repair-procedures-1-of-5) in Engine Mechanical - 3.6L.
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls - 3.6L.
  4. Remove the intake air resonator and reposition for compressor clearance. Refer to «Air Cleaner Intake Duct Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls - 3.6L.
  5. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  6. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  7. Remove the compressor mounting bolt (3) from the compressor.
  8. Lower the vehicle.
  9. Loosen the compressor mounting bolts (1) until the threads are disengaged.
  10. Remove the suction line bolt at the compressor.
  11. Disconnect the suction line from the compressor.
  12. Remove and discard the O-ring seals.
  13. Remove the discharge line bolt at the compressor.
  14. Disconnect the discharge line from the compressor.
  15. Remove and discard the O-ring seals.
  16. Disconnect the electrical connector (2) from the compressor.
  17. Rotate the compressor. Remove the compressor from the vehicle.
  18. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
  19. Remove the compressor mounting bolts from the compressor.
  20. If you are replacing the compressor, balance the compressor oil. Refer to «Compressor Oil Balancing»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Partially install the compressor.
  2. Install the compressor mounting bolts (1) finger tight. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
  3. Install the new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. Install the suction line to the compressor.
  5. Install the suction line bolt to the compressor. Tighten: Tighten the nut to 9.8 N.m (87 lb in).
  6. Install the new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  7. Install the discharge line to the compressor.
  8. Install the discharge line bolt to the compressor. Tighten: Tighten the nut to 9.8 N.m (87 lb in).
  9. Connect the electrical connector (2).
  10. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  11. Install the compressor mounting stud (3) finger tight. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
  12. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  13. Lower the vehicle.
  14. Reposition intake air resonator and install. Refer to «Air Cleaner Intake Duct Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls - 3.6L.
  15. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls - 3.6L.
  16. Install the engine drive belt. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-36l-ly7-repair-procedures-1-of-5) in Engine Mechanical - 3.6L.
  17. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  18. Leak test the fitting of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
  3. Remove the radiator. Refer to «Radiator Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
  4. Remove the condenser. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) and «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove the drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) in Engine Mechanical - 5.7L.
  6. Remove the A/C drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) in Engine Mechanical - 5.7L.
  7. Loosen the upper A/C compressor mounting bolts.
  8. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  9. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  10. Disconnect the electrical connector (5) from the compressor.
  11. Remove the screw for the electrical connector mounting bracket. Necessary for clearance during the compressor removal.
  12. Remove the suction line bolt at the compressor.
  13. Disconnect the suction line from the compressor.
  14. Remove and discard the O-ring seals.
  15. Remove the discharge line bolt at the compressor.
  16. Disconnect the discharge line from the compressor.
  17. Remove and discard the O-ring seals.
  18. Remove the compressor mounting bolts (1, 2, 3, 4).
  19. Remove the A/C hose support bracket to oil pan bolt.
  20. Lower the vehicle.
  21. Rotate the compressor. Remove the compressor from the vehicle.
  22. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
  23. If you are replacing the compressor, balance the compressor oil. Refer to «Compressor Oil Balancing»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Remove the screw for the electrical connector mounting bracket.
  2. Install the upper A/C compressor mounting bolts (1, 2, 3, 4) to the compressor.
  3. Install the A/C compressor.
  4. Install the upper compressor mounting bolts finger tight.
  5. Raise the vehicle.
  6. Install the lower A/C compressor mounting bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
  7. Install the electrical connector mounting bracket to the compressor.
  8. Install the screw for the electrical connector mounting bracket. Tighten: Tighten the bolts to 2 N.m (17 lb in).
  9. Install the new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  10. Install the suction line to the compressor.
  11. Install the suction line bolt to the compressor. Tighten: Tighten the nut to 9.8 N.m (87 lb in).
  12. Install the new O-ring seals to the line fittings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  13. Install the discharge line to the compressor.
  14. Install the discharge line bolt to the compressor. Tighten: Tighten the nut to 9.8 N.m (87 lb in).
  15. Connect the electrical connector (2).
  16. Install the A/C hose support bracket to oil pan bolt. Tighten: Tighten the nut to 9.8 N.m (87 lb in).
  17. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  18. Lower the vehicle.
  19. Tighten the upper front compressor mounting bolt. Tighten: Tighten the bolt to 25 N.m (18 lb ft).
  20. Install the A/C drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) in Engine Mechanical - 5.7L.
  21. Install the engine drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) in Engine Mechanical - 5.7L.
  22. Install the condenser. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) , «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  23. Install the radiator. Refer to «Radiator Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
  24. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
  25. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  26. Leak test the fitting of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Disassemble the A/C refrigerant components. Refer to the appropriate repair procedure
  2. Remove the O-ring seal from the A/C refrigerant component.
  3. Inspect the O-ring seal for signs of damage to help determine the root cause of the failure.
  4. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.
  5. Cap or tape the A/C refrigerant components.
  6. Discard the O-ring seal.
  1. Inspect the new O-ring seal for any sign or cracks, cuts, or damage. Replace if necessary.
  2. Remove the cap or tape from the A/C refrigerant components.
  3. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant components.
  4. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
  5. Carefully slide the new O-ring seal onto the A/C refrigerant component.
  6. The O-ring seal must be fully seated.
  7. Assemble the A/C components. Refer to the appropriate repair procedure.
  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Connect Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  3. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  4. Remove the lower condenser line bolt (1).
  5. Lower the vehicle.
  6. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls - 3.6L or «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-2.6L and 3.2L.
  7. Remove the condenser tube quick connect fitting, using the J 45689 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove the condenser tube clamp bolt (1).
  9. Remove the condenser tube.
  1. Install the new O-rings to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the condenser tube to the liquid line.
  3. Install the condenser tube quick connect fitting (2).
  4. Install the condenser tube clamp bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
  5. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls-3.6L or «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-2.6L and 3.2L.
  6. Raise the vehicle.
  7. Install a new O-ring to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Connect the lower condenser line to the condenser.
  9. Install the lower condenser line bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
  10. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  11. Lower the vehicle.
  12. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  13. Leak test the fittings of the component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Connect Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
  3. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  4. Remove the lower condenser line bolt (1).
  5. Lower the vehicle.
  6. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L (LS6).
  7. Remove the condenser tube quick connect fitting, using the J 45689 (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove the condenser tube clamp bolt (1).
  9. Remove the condenser tube.
  1. Install the new O-rings to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the condenser tube to the liquid line.
  3. Install the condenser tube quick connect fitting (2).
  4. Install the condenser tube clamp bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
  5. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L (LS6).
  6. Raise the vehicle.
  7. Install a new O-ring to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Connect the lower condenser line to the condenser.
  9. Install the lower condenser line bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
  10. Lower the vehicle.
  11. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  12. Leak test the fittings of the component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  13. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  3. Remove the bolt that holds the compressor discharge hose to the compressor.
  4. Separate the compressor discharge hose from the compressor.
  5. Remove the bolt (1) from the condenser.
  6. Separate the discharge line from the condenser.
  7. Remove the discharge hose.
  8. Remove and discard the O-ring seals.
  1. Lubricate the O-rings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the discharge hose.
  3. Connect the discharge hose to compressor.
  4. Install the discharge hose bolt. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  5. Install the discharge hose to the condenser.
  6. Install the bolt (1) to the discharge hose. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  7. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  8. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  9. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  3. Remove the bolt (2) that holds the compressor discharge hose to the compressor.
  4. Separate the compressor discharge hose from the compressor.
  5. Remove the bolt (1) from the condenser.
  6. Disconnect the discharge line from the condenser.
  7. Remove the discharge hose.
  1. Lubricate the O-rings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the discharge hose.
  3. Connect the discharge hose to compressor.
  4. Install the discharge hose bolt (2). Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  5. Install the discharge hose to the condenser.
  6. Install the bolt (1) to the discharge hose. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  7. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  8. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  9. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  3. Remove the radiator. Refer to «Radiator Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
  4. Remove the bolt that holds the compressor discharge hose to the compressor.
  5. Separate the compressor discharge hose from the compressor.
  6. Remove the discharge hose clamp bolt.
  7. Remove the bolt (1) from the condenser.
  8. Separate the discharge line from the condenser.
  9. Remove the discharge hose.
  10. Remove and discard the O-ring seals.
  1. Lubricate the O-rings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the discharge hose.
  3. Connect the discharge hose to compressor.
  4. Install the discharge hose bolt. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  5. Install the discharge hose clamp bolt.
  6. Install the discharge hose to the condenser.
  7. Install the bolt (1) to the discharge hose. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  8. Install the radiator. Refer to «Radiator Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
  9. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  10. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  11. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Suction Hose Replacement (LHD, LY7)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Using J 45689 (1), disconnect the suction hose from the evaporator by pressing the probe end into the 2 small openings in the plastic quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. Remove the suction hose retaining screw from the clamp.
  4. Separate the liquid line from the A/C suction line bracket.
  5. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 3.6L (LY7).
  6. Remove the retaining bolt from the compressor.
  7. Separate the suction hose from the evaporator
  8. Remove the suction hose from the vehicle.
  9. Remove and discard the O-ring seals.
  1. Coat the new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the suction hose.
  3. Connect the suction hose to the evaporator.
  4. Position the clamp (1) around the suction hose and engage.
  5. Gently tug on the suction line to ensure that the clamp is engaged.
  6. Position the liquid line into the bracket.
  7. Install the screw into the bracket. Tighten: Tighten the screw to 1 N.m (9 lb in).
  8. Connect the suction hose to the compressor.
  9. Install the retaining bolt to the compressor. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  10. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 3.6L (LY7).
  11. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  12. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Suction Hose Replacement (LHD, LA3, LY9)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Using the J 45689 (1), disconnect the suction hose from the evaporator by pressing the probe end into the two small openings in the plastic quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. Remove the suction hose retaining screw (1) from the clamp.
  4. Separate the suction hose from the clamp.
  5. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and 3.2L.
  6. Remove the retaining bolt (1) from the compressor.
  7. Remove the suction hose from the vehicle.
  1. Coat the new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the suction hose.
  3. Connect the suction hose to the evaporator.
  4. Position the clamp (1) around the suction hose and engage.
  5. Gently tug on the suction hose to ensure that the clamp is engaged.
  6. Position the suction hose into the bracket.
  7. Install the screw (1) into the bracket. Tighten: Tighten the screw to 1 N.m (9 lb in).
  8. Connect the suction hose to the compressor.
  9. Install the retaining bolt (1) to the compressor. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  10. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and 3.2L.
  11. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  12. Leak test the fittings of the component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Suction Hose Replacement (RHD, LA3, LY9)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) , «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  3. Using the J 45689 (1), disconnect the suction hose from the evaporator by pressing the probe end into the two small openings in the plastic quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. Remove the suction hose retaining screw (1) from the clamp.
  5. Separate the suction hose from the clamp.
  6. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and 3.2L.
  7. Remove the retaining bolt (1) from the compressor.
  8. Remove the suction hose from the vehicle.
  1. Coat the new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the suction hose.
  3. Connect the suction hose to the evaporator.
  4. Position the clamp (1) around the suction hose and engage.
  5. Gently tug on the suction hose to ensure that the clamp is engaged.
  6. Position the suction hose into the bracket.
  7. Install the screw (1) into the bracket. Tighten: Tighten the screw to 1 N.m (9 lb in).
  8. Connect the suction hose to the compressor.
  9. Install the retaining bolt (1) to the compressor. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  10. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 2.6L and 3.2L.
  11. Install the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  12. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  13. Leak test the fittings of the component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Suction Hose Replacement (LS6)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  3. Using J 45689 (1), disconnect the suction hose from the evaporator by pressing the probe end into the 2 small openings in the plastic quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. Remove the suction hose retaining screw from the clamp.
  5. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 5.7L.
  6. Remove the retaining bolt from the compressor.
  7. Remove the discharge hose bolt from the compressor.
  8. Remove the discharge hose from the compressor.
  9. Remove the suction hose clamp bolt.
  10. Remove the suction hose from the vehicle.
  11. Remove and discard the O-ring seals.
  1. Coat the new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the suction hose.
  3. Connect the suction hose to the evaporator.
  4. Position the clamp (1) around the suction hose and engage.
  5. Gently tug on the suction line to ensure that the clamp is engaged.
  6. Position the liquid line into the bracket.
  7. Install the screw into the bracket. Tighten: Tighten the screw to 1 N.m (9 lb in).
  8. Install the suction hose clamp bolt.
  9. Connect the suction hose to the compressor.
  10. Install the retaining bolt to the compressor. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  11. Connect the discharge hose to the compressor.
  12. Install the discharge hose to compressor bolt. Tighten: Tighten the bolt to 9.8 N.m (87 lb in).
  13. Install the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  14. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls - 5.7L.
  15. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  16. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Liquid Line Replacement (LHD, LY7)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air cleaner from the vehicle. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 3.6L (LY7).
  3. Disconnect the electrical connector (1) from the A/C high pressure switch (2).
  4. Using J 45689 disconnect the liquid line to condenser tube quick joint by pressing the probe end into the 2 small openings on the quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove the liquid line from the strut tower retaining clip.
  6. Using J 45689 disconnect the liquid line at the evaporator fitting (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  7. Remove the liquid line from the vehicle.
  8. Remove and discard the O-ring seals.
  1. Coat new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the liquid line in to the vehicle.
  3. Connect the liquid line to the evaporator.
  4. Install the A/C quick connect clamp (1) on the line.
  5. Engage the clamp.
  6. Gently tug on the liquid line to ensure that the clamp is engaged.
  7. Connect the liquid line at the condenser tube.
  8. Install the A/C quick connect clamp on the line.
  9. Gently tug on the liquid line to ensure that the clamp (2) is engaged.
  10. Secure the liquid line into the strut tower retaining clip.
  11. Connect the electrical connector (1) to the high pressure switch (2).
  12. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 3.6L (LY7).
  13. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  14. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Liquid Line Replacement (LHD, LA3, LY9)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air cleaner from the vehicle. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 2.6L and 3.2L.
  3. Disconnect the A/C high pressure switch electrical connector (1) from the switch (2).
  4. Remove the retaining clip screw (1) from the A/C line.
  5. Using the J 45689 disconnect the quick joint (2) by pressing the probe end into the two small openings on the quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. Remove the liquid line from the strut tower retaining clip (1).
  7. Using the J 45689 disconnect the liquid line at the evaporator fitting. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove the liquid line from the vehicle.
  1. Coat new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the liquid line in to the vehicle.
  3. Secure the liquid line into the bracket (1) on the strut tower.
  4. Connect the liquid line to the evaporator.
  5. Install the A/C quick connect clamp (1) on the line.
  6. Engage the clamp.
  7. Gently tug on the liquid line to ensure that the clamp is engaged.
  8. Connect the liquid line at the condenser.
  9. Install the retaining clip screw (1) to the A/C line. NOTE: Refer to «Fastener Notice»(/cadillac/cts/i-2002-2007/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices. Tighten: Tighten the screw to 9.8 N.m (87 lb in).
  10. Install the A/C quick connect clamp on the line.
  11. Gently tug on the liquid line to ensure that the clamp (2) is engaged.
  12. Connect the high pressure switch electrical connector (1) to the switch (2).
  13. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 2.6L and 3.2L.
  14. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  15. Leak test the fittings of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Liquid Line Replacement (RHD, LA3, LY9)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  3. Remove the air cleaner from the vehicle. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 2.6L and 3.2L.
  4. Disconnect the A/C high pressure switch electrical connector (1) from the switch (2).
  5. Using the J 45689 disengage the clamp (2) at the fan assembly. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. Removing Retaining Clip Screw From A/C Line
  7. Using J 45689 , disconnect the quick joint (2) by pressing the probe end into the two small openings on the quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove the liquid line from the strut tower retaining clip (1).
  9. Using J 45689 disconnect the liquid line at the evaporator fitting. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  10. Remove the liquid line from the vehicle.
  1. Coat new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the liquid line in to the vehicle.
  3. Secure the liquid line into the bracket (1) on the strut tower.
  4. Connect the liquid line to the evaporator.
  5. Install the A/C quick connect clamp (1) on the line.
  6. Engage the clamp.
  7. Gently tug on the liquid line to ensure that the clamp is engaged.
  8. Connect the liquid line at the condenser.
  9. Install the retaining clip screw (1) to the A/C line. NOTE: Refer to «Fastener Notice»(/cadillac/cts/i-2002-2007/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices. Tighten: Tighten the screw to 9.8 N.m (87 lb in).
  10. Install the A/C quick connect clamp on the line.
  11. Gently tug on the liquid line to ensure that the clamp (2) is engaged.
  12. Connect the high pressure switch electrical connector (1) to the switch (2).
  13. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls 2.6L and 3.2L.
  14. Install the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  15. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  16. Leak test the fittings of the repaired or reinstalled component using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Liquid Line Replacement (LS6)

Tools Required

  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air cleaner from the vehicle. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-5.7L (LS6).
  3. Disconnect the electrical connector (1) from the A/C high pressure switch (2).
  4. Using J 45689 disconnect the liquid line to condenser tube quick joint by pressing the probe end into the 2 small openings on the quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove the liquid line from the strut tower retaining clip.
  6. Using J 45689 disconnect the suction hose at the evaporator fitting. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . This will allow access to the liquid line fitting.
  7. Using J 45689 disconnect the liquid line at the evaporator fitting (1). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove the liquid line from the vehicle.
  9. Remove and discard the O-ring seals.
  1. Coat new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the liquid line into the vehicle.
  3. Connect the liquid line to the evaporator.
  4. Install the A/C quick connect clamp (1) on the line.
  5. Engage the clamp.
  6. Gently tug on the liquid line to ensure that the clamp is engaged.
  7. Connect the suction hose to the evaporator.
  8. Install the A/C quick connect clamp on the line.
  9. Connect the liquid line at the condenser tube.
  10. Install the A/C quick connect clamp on the line.
  11. Gently tug on the liquid line to ensure that the clamp (2) is engaged.
  12. Secure the liquid line into the strut tower retaining clip.
  13. Connect the electrical connector (1) to the high pressure switch (2).
  14. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-5.7L (LS6).
  15. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  16. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Remove the electrical center cover.
  2. Remove the A/C compressor relay (1) from the electrical center.
  1. Install the A/C compressor relay (1) to the electrical center.
  2. Install the electrical center cover.

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  3. Remove the receiver dryer bottom plug (1).
  4. Remove the filter (2).
  5. Remove the desiccant bag (3).
  1. Install the desiccant bag (3).
  2. Install the filter (2).
  3. Lubricate the O-rings on the plug with refrigerant oil before installing. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. Install the bottom plug (1). Tighten: Tighten the plug to 12.5 N.m (111 lb in).
  5. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  6. Lower the vehicle.
  7. Add the proper amount of oil. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  8. Evacuate and recharge the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  9. Leak test the fittings of the component with J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Remove the I/P Retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the insulation (1) from the TXV.
  3. Remove the HVAC line clamp screw.
  4. Remove the HVAC line clamp.
  5. Remove the TXV to evaporator bolts (1).
  6. Remove the TXV line bracket.
  7. Remove the TXV from the evaporator core.
  8. Separate the TXV from the A/C lines by pulling straight out.
  9. Remove the TXV.
  1. Lubricate the O-rings. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install the A/C lines into the TXV.
  3. Carefully slide the TXV onto the evaporator core until seated.
  4. Install the TXV line bracket.
  5. Install the TXV to evaporator bolts (1). Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
  6. Install the HVAC line clamp.
  7. Install the HVAC line clamp screw. Tighten: Tighten the screw to 1 N.m (8 lb in).
  8. Install the insulation (1) onto the lines and TXV.
  9. Install the I/P Retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-2.6L and 3.2L or to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls-3.6L.
  3. Disconnect the electrical connector (1) from the A/C refrigerant pressure sensor (2).
  4. Remove the A/C refrigerant pressure sensor.
  1. Lubricate the O-ring with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . NOTE: Refer to «Fastener Notice»(/cadillac/cts/i-2002-2007/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices.
  2. Install the A/C refrigerant pressure sensor (2). Tighten: Tighten the sensor to 9.8 N.m (87 lb in).
  3. Connect the electrical connector (1) to the A/C refrigerant pressure sensor.
  4. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-26l-32l-introduction) in Engine Controls-2.6L and 3.2L or to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-36l-introduction) in Engine Controls-3.6L.
  5. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  6. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the radiator support brackets. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  3. Remove the upper condenser bolts.
  4. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  5. Disconnect the hose from the power steering cooler.
  6. Remove the discharge hose bolt (1).
  7. Remove the discharge hose.
  8. Remove and discard the O-ring seal.
  9. Remove the condenser tube bolt (1).
  10. Remove the condenser tube.
  11. Remove and discard the O-ring seal.
  12. Remove the lower condenser mounting bolts (1).
  13. Remove the condenser.
  1. Add refrigerant oil. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  2. Install the condenser.
  3. Install the lower condenser mounting bolts (1). Tighten: Tighten the bolts to 3.9 N.m (35 lb in).
  4. Lubricate the O-ring with refrigerant oil before installing the hose. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Connect the condenser tube to the condenser.
  6. Install the condenser tube bolt (1). Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  7. Connect the power steering lines to hoses.
  8. Lube the O-ring with refrigerant oil before installing hose. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  9. Connect the discharge hose to the condenser.
  10. Connect the discharge hose bolt (1) to the condenser. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  11. Ensure that side seals are not damaged and in position around pipes.
  12. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  13. Install the upper condenser mounting bolts. Tighten: Tighten the bolts to 3.9 N.m (35 lb in).
  14. Install the upper radiator supports. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) and «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  15. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  16. Leak test all fittings of the repaired or reinstalled components using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the radiator support brackets. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  3. Remove the upper condenser mounting bolts.
  4. Remove the auxiliary cooling fan. Refer to «Cooling Fan and Motor Replacement - Auxiliary»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  5. Remove the liquid line bolt (1) at the condenser
  6. Pull the line straight out to protect the O-ring.
  7. Disconnect the discharge hose (1) at the condenser.
  8. Pull the line straight out to protect the O-ring.
  9. Remove the condenser.
  1. Add refrigerant oil. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  2. Install the condenser.
  3. Install the auxiliary cooling fan. Refer to «Cooling Fan and Motor Replacement - Auxiliary»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  4. Lube O-ring with refrigerant oil before installing. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Connect the discharge hose to the condenser.
  6. Install the discharge hose bolt (1). Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  7. Lube O-ring with refrigerant oil before installing. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Connect the liquid line to the condenser.
  9. Connect the liquid line bolt (1) to the condenser. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  10. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  11. Install the upper condenser bolts. Tighten: Tighten the bolts to 3.9 N.m (35 lb in).
  12. Install the radiator support brackets. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) and «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  13. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  14. Leak test all fittings of the repaired or reinstalled components using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the radiator support brackets. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  3. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  4. Remove the lower condenser bolts.
  5. Remove the discharge hose bolt (1).
  6. Remove the discharge hose.
  7. Remove and discard the O-ring seal.
  8. Remove the condenser tube bolt (1).
  9. Remove the condenser tube.
  10. Remove and discard the O-ring seal.
  11. Remove the upper condenser mounting bolts (1).
  12. Remove the condenser.
  1. Add refrigerant oil to the condenser. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  2. Install the condenser.
  3. Install the upper condenser mounting bolts (1). Tighten: Tighten the bolts to 3.9 N.m (35 lb in).
  4. Lubricate the O-ring with refrigerant oil before installing the hose. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Connect the condenser tube to the condenser.
  6. Install the condenser tube bolt (1). Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  7. Lube the O-ring with refrigerant oil before installing hose. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Connect the discharge hose to the condenser.
  9. Connect the discharge hose bolt (1) to the condenser. Tighten: Tighten the bolt to 5.4 N.m (48 lb in).
  10. Ensure that side seals are not damaged and in position around pipes.
  11. Install the lower condenser mounting bolts. Tighten: Tighten the bolts to 3.9 N.m (35 lb in).
  12. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  13. Install the upper radiator supports. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  14. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  15. Leak test all fittings of the repaired or reinstalled components using the J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. J 39400-A Halogen Leak Detector. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 38185 Hose Clamp Pliers
  3. J 45689 A/C Quick Joint Tool. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  2. Remove the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  3. Drain the coolant. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  4. Using the J 38185 disconnect the heater inlet hose (1).
  5. Using the J 38185 disconnect the heater outlet hose (1).
  6. Disconnect both A/C lines at the cowl.
  7. Using the J 45689 (1) insert the probe end into the two small openings of the plastic quick joint. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Remove both quick joint clamps.
  9. Disconnect both A/C lines.
  10. Remove the IP Carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  11. Remove the air inlet assembly.
  12. Disconnect the HVAC module electrical connector.
  13. Disconnect the HVAC module drain tube (2) from the floor.
  14. Press the tab and release the left rear duct from the HVAC module.
  15. Disconnect the left rear heater duct from the HVAC module.
  16. Press the tab and release the right rear duct from the HVAC module.
  17. Disconnect the right rear heater ducts from the HVAC module.
  18. Remove the lower left HVAC module mounting nut (1).
  19. Remove the upper left HVAC module mounting nut (1).
  20. Remove the HVAC module from the vehicle.
  21. Remove the foam from the A/C lines.
  22. Remove the foam from around the heater pipes.
  1. Install the thick foam packing (1) on the heater core pipes.
  2. Install the thin foam packing (2) on the heater core pipes.
  3. Install the thick foam packing (1) on the A/C lines.
  4. Install the thin foam packing (2) on the A/C lines.
  5. Install the HVAC module into the vehicle.
  6. Install the upper left HVAC module mounting nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
  7. Install the lower left HVAC module mounting nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
  8. Connect the rear heater ducts to the HVAC module.
  9. Connect the drain tube to the bottom of the HVAC module.
  10. Connect the drain tube (2) to the floor.
  11. Connect the HVAC electrical connector.
  12. Install the air inlet assembly.
  13. Lubricate the O-rings of the A/C line with refrigerant oil before connecting the A/C lines. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  14. Install the A/C line and A/C line quick connect line clamp (1) to the evaporator.
  15. Engage the clamp.
  16. Install the A/C line and A/C line quick connect line clamp (1) to the evaporator.
  17. Engage the clamp.
  18. Connect the heater inlet hose (1) using J 38185 .
  19. Connect the heater outlet hose (1) using J 38185 .
  20. Install the IP carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  21. Install the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  22. Fill the coolant. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  23. Evacuate and recharge the AC system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
  24. Leak test the fittings of the component using J 39400-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Remove the HVAC module assembly. Refer to «HVAC Module Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove the insulation (1) from the TXV.
  3. Remove the HVAC line clamp screw.
  4. Remove the HVAC line clamp.
  5. Remove the TXV to evaporator bolts (1).
  6. Remove the TXV line bracket.
  7. Remove the TXV from the evaporator core.
  8. Separate the TXV from the A/C lines by pulling straight out.
  9. Remove the TXV.
  10. Remove the screws that hold the case together.
  11. Remove the clips that hold the case together.
  12. Disconnect the thermistor electrical connector.
  13. Separate the HVAC module.
  14. Remove the thermistor from the evaporator core.
  15. Remove the evaporator core.
  1. Add refrigerant oil. Refer to «Refrigerant System Capacities»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
  2. Install new evaporator core seals to evaporator.
  3. Install the evaporator core.
  4. Install the thermistor to the evaporator into the same position as removed.
  5. Slide the HVAC module together.
  6. Install the screws that hold the case together. Tighten: Tighten the screws to 1 N.m (8 lb in.)
  7. Install the clips that hold the case together.
  8. Connect the thermistor electrical connector.
  9. Lube A/C lines with refrigerant oil before installing. Refer to «O-Ring Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  10. Install the A/C lines into the TXV.
  11. Carefully slide the TXV onto the evaporator core until seated.
  12. Install the TXV line bracket.
  13. Install the TXV to evaporator bolts (1). Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
  14. Install the HVAC line clamp.
  15. Install the HVAC line clamp screw. Tighten: Tighten the screw to 1 N.m (8 lb in).
  16. Install the insulation (1) onto the lines and TXV.
  17. Install the HVAC module. Refer to «HVAC Module Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Remove the center console. Refer to «Console Replacement - Front Floor»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the rubber adhesive patch (1) from around the drain tube (2).
  3. Open the flap in the tunnel insulator and unsnap drain fitting from the tunnel sheet metal.
  4. Remove the HVAC module drain tube from the HVAC module.
  1. Install the HVAC module drain tube to the HVAC module.
  2. Ensure that the drain tube is fully seated to the HVAC module.
  3. Snap drain fitting into the tunnel sheet metal.
  4. Close the flap on the tunnel insulator.
  5. Install the rubber adhesive patch (1) around the drain tube (2).
  6. Install the center console. Refer to «Console Replacement - Front Floor»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.

J 38185 Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  2. Remove the left fuel rail cover.
  3. Using J 38185 slide the clamp back on the heater inlet hose.
  4. Remove the inlet heater hose from the heater core.
  5. Using J 38185 slide the clamp back on the heater outlet hose.
  6. Remove the outlet heater hose from the heater core.
  7. Using J 38185 slide the clamp back on the heater inlet hose (1).
  8. Remove the inlet heater hose (1) from the engine.
  9. Using J 38185 slide the clamp back on the heater outlet hose (2).
  10. Remove the outlet heater hose (2) from the engine.
  11. Remove the wire harness from the pipe.
  12. Remove the heater hose bracket nuts.
  13. Remove the heater hose assembly.
  1. Install the heater hose assembly into the vehicle.
  2. Install the heater hose bracket nuts. Tighten: Tighten the nuts to 9 N.m (7 lb ft)
  3. Install the wire harness to the pipe.
  4. Install the outlet heater hose (2) to the engine.
  5. Using the J 38185 slide the clamp back into the original position on the hose.
  6. Install the inlet heater hose (1) to the engine.
  7. Using the J 38185 slide the clamp back into the original position on the hose.
  8. Install the outlet heater hose to the heater core.
  9. Using the J 38185 slide the clamp back into the original position on the hose.
  10. Install the inlet heater hose to the heater core.
  11. Using the J 38185 slide the clamp back into the original position on the hose.
  12. Install the left fuel rail cover.
  13. Fill the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

J 38185 Spring Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  2. Raise the vehicle.
  3. Remove the lower bolt from the heater pipe assembly at the thermostat assembly.
  4. Lower the vehicle
  5. Remove the cover assembly to the engine intake manifold.
  6. Remove the battery tray. Refer to «Battery Tray Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) , «Battery Tray Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Tray Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  7. Remove the lower bolt securing the battery tray to the panel assembly on the front air inlet housing.
  8. Remove the nuts securing the panel assembly to the front of the dash.
  9. Remove the panel assembly from the vehicle.
  10. Using J 38185 slide the clamp back on the heater inlet hose.
  11. Remove the inlet heater hose from the heater core.
  12. Using J 38185 slide the clamp back on the heater outlet hose.
  13. Remove the heater outlet hose from the heater core.
  14. Remove the upper bolt of the heater pipe assembly at the thermostat assembly.
  15. Remove the entire assembly from the vehicle.
  16. Remove the heater inlet hose from the heater pipe assembly.
  1. Install the heater inlet hose to the heater pipe assembly.
  2. Using J 38185 slide the clamp back into the original position on the hose.
  3. Position the entire assembly in the vehicle.
  4. Install the upper bolt of the heater pipe assembly at the thermostat assembly. Tighten: Tighten the bolt to 10 N.m (7 lb ft).
  5. Install the inlet heater inlet hose to the heater core.
  6. Using J 38185 slide the clamp back into the original position on the hose.
  7. Install the heater outlet hose to the heater core.
  8. Using J 38185 slide the clamp back into the heater outlet hose.
  9. Install the panel assembly for the front air inlet housing to the vehicle.
  10. Install the lower bolt securing the battery tray to the panel assembly. Tighten: Tighten the bolt to 6 N.m (53 lb in).
  11. Install the nuts securing the panel assembly to the front of the dash. Tighten: Tighten the nuts to 6 N.m (53 lb in).
  12. Install the battery tray. Refer to «Battery Tray Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) , «Battery Tray Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Tray Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  13. Raise the vehicle.
  14. Install the lower bolt to the heater pipe assembly at the thermostat assembly. Tighten: Tighten the bolt to 10 N.m (7 lb ft).
  15. Lower the vehicle
  16. Install the cover assembly to the engine intake manifold.
  17. Fill the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

J 38185 Spring Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  2. Using J 38185 slide the clamp back on the heater inlet hose.
  3. Remove the inlet heater hose (1) from the heater core.
  4. Using J 38185 slide the clamp back on the heater inlet hose.
  5. Remove the clamp and hose from the coolant inlet pipe.
  1. Install the inlet heater hose to the coolant inlet pipe.
  2. Using the J 38185 slide the clamp back into the original position on the hose.
  3. Installing inlet heater hose (1) to the heater core.
  4. Using the J 38185 slide the clamp back into the original position on the hose.
  5. Fill the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

J 38185 Spring Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  2. Raise the vehicle.
  3. Remove the lower bolt from the heater pipe assembly at the thermostat assembly.
  4. Lower the vehicle
  5. Remove the cover assembly to the engine intake manifold.
  6. Remove the battery tray. Refer to «Battery Tray Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) , «Battery Tray Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Tray Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  7. Remove the lower bolt securing the battery tray to the panel assembly on the front air inlet housing.
  8. Remove the nuts securing the panel assembly to the front of the dash.
  9. Remove the panel assembly from the vehicle.
  10. Using J 38185 slide the clamp back on the heater inlet hose.
  11. Remove the inlet heater hose from the heater core.
  12. Using J 38185 slide the clamp back on the heater outlet hose.
  13. Remove the heater outlet hose from the heater core.
  14. Remove the upper bolt of the heater pipe assembly at the thermostat assembly.
  15. Remove the entire assembly from the vehicle.
  16. Remove the heater outlet hose from the heater pipe assembly.
  1. Install the heater outlet hose to the heater pipe assembly.
  2. Using J 38185 slide the clamp back into the original position on the hose.
  3. Position the entire assembly in the vehicle.
  4. Install the upper bolt of the heater pipe assembly at the thermostat assembly. Tighten: Tighten the bolt to 10 N.m (7 lb ft).
  5. Install the inlet heater inlet hose to the heater core.
  6. Using J 38185 slide the clamp back into the original position on the hose.
  7. Install the heater outlet hose to the heater core.
  8. Using J 38185 slide the clamp back into the heater outlet hose.
  9. Install the panel assembly for the front air inlet housing to the vehicle.
  10. Install the lower bolt securing the battery tray to the panel assembly. Tighten: Tighten the bolt to 6 N.m (53 lb in).
  11. Install the nuts securing the panel assembly to the front of the dash. Tighten: Tighten the nuts to 6 N.m (53 lb in).
  12. Install the battery tray. Refer to «Battery Tray Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) , «Battery Tray Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Tray Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
  13. Raise the vehicle.
  14. Install the lower bolt to the heater pipe assembly at the thermostat assembly. Tighten: Tighten the bolt to 10 N.m (7 lb ft).
  15. Lower the vehicle
  16. Install the cover assembly to the engine intake manifold.
  17. Fill the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

J 38185 Spring Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  2. Using the J 38185 slide the hose clamp (1) back on the heater hose.
  3. Remove the outlet heater hose from the afterboil pump.
  4. Using J 38185 slide the hose clamp (1) back on the heater hose.
  5. Remove the heater outlet hose from the heater core.
  6. Remove the heater outlet hose.
  1. Position the outlet heater hose assembly into the vehicle.
  2. Install the outlet hose to the heater core.
  3. Using the J 38185 slide the hose clamp (1) back into the original position on the hose.
  4. Install the outlet hose to the afterboil pump.
  5. Using the J 38185 slide the hose clamp (1) back into the original position on the hose.
  6. Fill the cooling system. Refer to «Draining and Filling Cooling System (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) , «Draining and Filling Cooling System (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
  1. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. With two hands release the tabs on each side of the access cover.
  3. Lift up the filter access cover (1).
  4. Remove the filter (1) from the filter housing.
  5. Gently pry out on the filter housing to separate the housing from the sheet metal.
  6. Remove the passenger air filter housing (1).
  1. Install the passenger air filter housing (1).
  2. Press the passenger air filter housing until all clips engage into the sheet metal.
  3. Ensure that there is a good seal between the passenger air filter housing and the sheet metal.
  4. Install the filter (1) in to the filter housing.
  5. Install the filter access cover (1).
  6. Install the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  2. With two hands release the tabs on each side of the access cover.
  3. Lift up the filter access cover (1).
  4. Remove the filter (1) from the filter housing.
  1. Install the filter (1) in to the filter housing.
  2. Install the filter access cover (1).
  3. Install the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
  1. Remove the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) Instrument Panel, Gages, and Console.
  2. Remove the closeout panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) or «Closeout/Insulator Panel Replacement - Left»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
  3. Remove the upper air inlet assembly bolts (1).
  4. Remove the lower right air inlet assembly bolt (1).
  5. Slide the assembly to the right and then lower.
  6. Disconnect the air inlet assembly electrical connector (1).
  7. Rotate the air inlet assembly (1) and remove.
  1. Connect the air inlet assembly electrical connector (1).
  2. Install the air inlet assembly (1) to the locator pin.
  3. Install the upper air inlet assembly bolts (1). Tighten: Tighten the bolt to 9 N.m (80 lb in)
  4. Install the lower right air inlet assembly bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in)
  5. Install the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  6. Install the closeout panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) or «Closeout/Insulator Panel Replacement - Left»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
  1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-36l-ly7-repair-procedures-1-of-5) .
  2. Remove the windshield wiper arms. Refer to «Wiper Arm Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) or «Wiper Arm Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
  3. Remove the air inlet grille panels (1,3). Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) .
  4. Disconnect the electrical connector (4) from the windshield wiper motor.
  5. Remove the wiper motor module (6). Refer to «Wiper Motor Module Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) or «Wiper Motor Module Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
  6. Remove the fasteners securing the panel assembly to the front of the dash.
  7. Remove the panel assembly from the vehicle.
  1. Install the panel assembly for the front air inlet housing to the vehicle.
  2. Install the fasteners securing the panel assembly to the front of the dash. Tighten: Tighten the bolt to 6 N.m (53 lb in).
  3. Install the wiper motor module (6). Refer to «Wiper Motor Module Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) or «Wiper Motor Module Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
  4. Install the electrical connector (4) to the windshield wiper motor.
  5. Install the air inlet grille panels (1,3). Refer to «Air Inlet Grille Panel Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) or «Air Inlet Grille Panel Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) .
  6. Install the windshield wiper arms. Refer to «Wiper Arm Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) or «Wiper Arm Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
  7. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-36l-ly7-repair-procedures-1-of-5) .
  1. Remove the right closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  3. Disconnect the blower motor electrical connector.
  4. Disconnect the blower motor processor electrical connector.
  5. Remove the screws (1) that retain the blower motor.
  6. Remove the air inlet housing bolts to gain clearance for the blower motor.
  7. Remove the blower motor.
  1. Install the blower motor.
  2. Install the blower motor screws (1). Tighten: Tighten the screws to 1.5 N.m (13 lb in).
  3. Install the air inlet housing bolts. Tighten: Tighten the screws to 6 N.m (53 lb in).
  4. Connect the blower motor processor electrical connector.
  5. Connect the blower motor electrical connector.
  6. Install the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  7. Install the right closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  1. Remove the left closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  3. Disconnect the electrical connector (1).
  4. Remove the blower motor screws (1).
  5. Remove the blower motor.
  1. Install the blower motor.
  2. Install the blower motor screws (1). Tighten: Tighten the screws to 1.5 N.m (13 lb in).
  3. Connect the blower motor electrical connector (1).
  4. Install the IP compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  5. Install the left closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  1. Using a small flat bladed tool, insert between the air vent and the I/P retainer.
  2. Pry out in order to release the retainer securing the air vent.
  1. Position the air vent onto the I/P.
  2. Push the air vent into the I/P in order to secure.
  1. Pull out on the center I/P vent assembly in order to release the fasteners securing the vent to the I/P.
  2. Disconnect the hazard switch electrical connector.
  3. Remove the vent from the I/P.
  1. Connect the hazard switch connector.
  2. Position hazard switch wire harness (1) in the harness retainers.
  3. Push the wire service loop forward between the duct as the vent is positioned on the I/P.
  4. Overlap the vent housing over the duct.
  5. Position the vent into the I/P. IMPORTANT: Ensure that the wire harness is not interfering with the moving parts of the vent.
  6. Push the vent in to the I/P in order to seat the retainers.
  1. Using a small flat bladed tool, insert between the air vent and the I/P retainer.
  2. Pry out in order to release the retainer securing the air vent.
  1. Position the air vent onto the I/P.
  2. Push the air vent into the I/P in order to secure.
  1. Remove the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the foam dash pad (1).
  3. Disconnect the wiring harness from the air duct.
  4. Remove the screws (1) that retain the air duct.
  5. Remove the left air duct (2), by unsnapping the air duct from the HVAC module.
  1. Install the left air duct (2), by pressing down until you hear the tabs engage on the HVAC module.
  2. Install the air outlet duct screws (1). Tighten: Tighten the screws to 2 N.m (18 lb in).
  3. Connect the wiring harness to the air duct.
  4. Install the foam dash pad (1).
  5. Install the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  1. Remove the IP retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the foam dash pad (1).
  3. Disconnect the wiring harness from the air duct (1).
  4. Remove the screws (1) that retain the air duct (2).
  5. Remove the right air duct (2), by releasing the tabs from the module.
  1. Install the right air duct (2), by pressing down until you hear the tabs engage on the HVAC module.
  2. Install the right air duct screws (1). Tighten: Tighten the screws to 2 N.m (18 lb in).
  3. Connect the wiring harness to the air duct (1).
  4. Install the foam dash pad (1).
  5. Install the IP retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  1. Remove the IP retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  2. Remove the pushpins.
  3. Press in on the tab to release the defroster duct (1) from the HVAC module.
  4. Remove the defroster duct (1).
  1. Install the defroster duct (1).
  2. Press down on the defroster duct (1) until you hear the tabs engage.
  3. Install the pushpins to the mag beam.
  4. Install the IP retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
  1. Remove the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__carpet-replacement-front) in Instrument Panel, Gages and Console.
  2. Remove the push pin (2) from the duct (1) and the carpet.
  3. Disconnect the wiring (1) from the duct.
  4. Press the tab to release the duct from the HVAC module.
  5. Disconnect the duct from the module.
  6. Remove the rear duct nut (1).
  7. Remove the air outlet duct (1).
  1. Install the air outlet duct (1).
  2. Install the rear duct nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
  3. Connect air outlet duct to the HVAC module.
  4. Connect the wiring (1) to the duct.
  5. Install the push pin (2) from the duct (1) and the carpet.
  6. Install the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__carpet-replacement-front) in Instrument Panel, Gages and Console.
  1. Remove the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__carpet-replacement-front) in Instrument Panel, Gages and Console.
  2. Remove the push pin (2) from the duct (1) and the carpet.
  3. Disconnect the wiring from the duct.
  4. Press the tab to release the duct from the module.
  5. Disconnect the duct from the module.
  6. Remove the rear duct nut (1).
  7. Remove the air outlet duct.
  1. Install the air outlet duct (2).
  2. Install the rear duct nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
  3. Install the air outlet duct.
  4. Connect the duct to the module.
  5. Connect the wiring to the duct.
  6. Install the push pin (2) from duct (1) and carpet.
  7. Install the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__carpet-replacement-front) in Instrument Panel, Gages and Console.
  1. Remove the HVAC module. Refer to «HVAC Module Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove the heater hose bracket screw.
  3. Remove the heater hose bracket (1).
  4. Slide the heater core out of the HVAC module.
  1. Slide the heater core into the HVAC module.
  2. Install the heater hose bracket (1).
  3. Install the heater hose bracket screw. Tighten: Tighten the screws to 1 N.m (9 lb in)
  4. Install the HVAC module. Refer to «HVAC Module Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Special Tools

Special Tools Illustration Tool Number/ Description J 38185 Hose Clamp Pliers J 39400-A Halogen Leak Detector J 42220 Universal 12V Leak Detection Lamp J 43600 ACR 2000 Air Conditioning Service Center J 43872 Fluorescent Dye Cleaner J 45037 A/C Oil Injector J 45268 A/C Flushing Adapter Kit J 45689 A/C Quick Joint Tool J 46297-12 Replacement Dye Cartridges J 46297 A/C Dye Injector Kit

Scheme 2

Scheme 2: Special Tools
Scheme 2: Special Tools

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

See also:
• Diagnostic System Check - HVAC Systems - Automatic
• Air Delivery Description and Operation
• Air Temperature Description and Operation
• Moving Parts and Hot Surfaces Caution
• Cooling System Description and Operation
• Cooling Fan Inoperative
• Too Cold in Vehicle
• Flushing
• Engine Fails To Reach Normal Operating Temperature (LY7, LS6)
• Drive Belt Excessive Wear Diagnosis
• Drive Belt Excessive Wear Diagnosis
• Drive Belt Tensioner Diagnosis
• Drive Belt Tensioner Diagnosis
• Drive Belt Replacement - Generator and Water Pump
• Instrument Panel (I/P) Retainer Replacement
• Loss of Coolant (M 35)
• Loss of Coolant (M 82)
• Coolant in Engine Oil
• Coolant in Engine Oil
• Fluid Leak Diagnosis
• Power Steering Fluid Leaks
• Afterblow Enable Procedure
• Air Cleaner Assembly Replacement
• Fastener Notice
• Air Cleaner Assembly Replacement
• Lifting and Jacking the Vehicle
• Air Deflector Replacement - Front
• Air Cleaner Assembly Replacement
• Radiator Replacement (LS6)
• Drive Belt Replacement - Accessory
• Battery Replacement (LHD)
• Wiper Arm Replacement (LHD)
• Carpet Replacement - Front
• Special Tools and Equipment
• Refrigerant Recovery and Recharging
• Leak Testing
• Air Conditioning (A/C) Diagnostics - Pressure Zone A
• Flushing
• Refrigerant System Capacities

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