Contents Wiring diagrams Section: Automatic HVAC System All sections

Heating, Ventilation, and Air Conditioning Chevrolet Camaro V

Automatic HVAC System 43 illustrations ~6767 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
A/C Compressor Clutch Bolt12 N.m106 lb in
A/C Compressor Front Bolt50 N.m36 lb ft
A/C Compressor Front Nut50 N.m36 lb ft
A/C Compressor Hose to A/C Compressor Block Fitting Nut17 N.m12.5 lb ft
A/C Compressor Hose to A/C Condenser Nut17 N.m12.5 lb ft
A/C Compressor Hose to Evaporator Tube Block Fitting Nut19 N.m14 lb ft
A/C Compressor Pressure Relief Valve8 N.m70 lb in
A/C Compressor Rear Bolt50 N.m36 lb ft
A/C Refrigerant Pressure Sensor4.7 N.m41 lb in
Air Distributor Case Cover Screws1.5 N.m13 lb in
Air Duct Bolts10 N.m89 lb in
Air Duct Center Screw1.8 N.m16 lb in
Blower Motor Screws1.5 N.m13 lb in
Blower Motor Control Module Screws1.5 N.m13 lb in
Evaporator Line Block Fitting-to-TXV Nut17 N.m12.5 lb ft
Heater Core Cover Screws1.5 N.m13 lb in
Heater Core Outlet Cover Screws1.5 N.m13 lb in
Heater Inlet Pipe Adapter Bolt7 N.m62 lb in
Heater Outlet Pipe Adapter Bolt7 N.m62 lb in
HVAC Module-to-Dash Bolts/Nuts10 N.m89 lb in
HVAC Module Upper Case Screws1.5 N.m13 lb in
I/P Center Air Outlet Screw2 N.m18 lb in
I/P Cluster Trim Bezel Assembly Screw2 N.m18 lb in
Side Window Defog Outlet Grille Screw2 N.m18 lb in
TXV-to-Evaporator Screws7 N.m62 lb in
TXV Stud7 N.m62 lb in

Refrigerant System Specifications

ApplicationSpecification
MetricEnglish
PAG Oil GM P/N 12378526 for United States PAG Oil GM P/N 88900060 for Canada
Compressor Replacement
The Delphi Service Compressor CSP17 is precharged with the specified amount of PAG Oil75 ml 12.5 oz 1
Condenser Replacement40 ml 11.35 oz 1
Desiccant Bag Replacement10 ml 10.34 oz 1
Evaporator Replacement30 ml 11.0 oz 1
Refrigerant Line Replacement10 ml 10.34 oz 1
Total System PAG Oil Capacity120 ml4.06 oz
R-134a
Refrigerant Charge0.6 kg1.32 lb
1 If more than the specified amount of PAG oil was drained from a component, add the equal amount of oil drained.

Handling of Refrigerant Lines and Fittings

CAUTIONTo avoid system damage use only R-134a dedicated tools when servicing the A/C system.
  1. Keep all metal tubing lines free of dents or kinks. Any line restrictions will cause the loss of system capacity.
  2. Never bend a flexible hose line to a radius of less than four times the diameter of the hose.
  3. Never allow a flexible hose line to come within 65 mm (2-1/2 in) of the exhaust manifold.
  4. Inspect flexible hose lines regularly for leaks or brittleness.
  5. Replace flexible hose lines with new lines if you find signs of deterioration or leaking.
  6. Discharge the refrigeration system of all refrigerant before disconnecting any fitting in the refrigeration system.
  7. Proceed very cautiously regardless of the gauge readings.
  8. Open the fittings very slowly.
  9. If you notice pressure when you loosen a fitting, allow the pressure to bleed off as described in «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) Procedures for A/C System.
  10. Cap or tape any refrigerant line immediately after it is opened. This will prevent the entrance of moisture and dirt, which can cause internal compressor wear or plugged lines in the condenser, the evaporator core, the expansion valve, or the compressor inlet screens. NOTE: Use two proper wrenches to connect the fittings.
  11. Back up the opposing fitting to prevent distortion of the connecting lines or the components.
  12. Keep the sealing surfaces in perfect condition. A burr or a piece of dirt may cause a refrigerant leak.
  13. When seal washers are used, always install the seal washer without lubrication.
  14. When O-rings are used, always lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil prior to installation.

Special Tools

  1. GE-50078: Infrared Refrigerant Leak Detector
  2. GE-41447: R-134A A/C Tracer Dye-Box of 24
  3. GE-42220: Universal 12V Leak Detection Lamp
  4. GE-43872: Fluorescent Dye Cleaner
  5. GE-46297: A/C Dye Injector Kit
  6. GE-46297-12: Replacement Dye Cartridges

For equivalent regional tools. Refer to Special Tools .

Refrigerant Leak Testing

Note. All A/C system repairs must be verified using electronic leak detection. Dye detection may take up 2 or 3 days to be reliable.

Note. General 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 refrigerant oil throughout the refrigerant system.

Verifying some passive leaks may require using the GE-50078: Infrared Refrigerant Leak Detector, even though the A/C system contains fluorescent dye.

The only time that adding additional fluorescent dye is required is after flushing the A/C system. Excessive dye can result in compressor damage.

Visual Inspection

Visually trace the entire refrigerant system and look for signs of lubricant leakage, damage, and corrosion on all lines hoses and components (Oil can be an indication of a leak). Each questionable area should be checked for leaks using an electronic leak detector.

Fluorescent Leak Detector

Note. Always use UV protective eyewear when working with UV light.

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 GE-42220: lamp.
  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 GE-43872: cleaner.

Fluorescent Dye Injection

  1. Not all of the fluorescent dyes are compatible with GM refrigerant systems. Using dyes not approved by GM may damage the vehicle's refrigerant system.
  2. To prevent false diagnosis, thoroughly clean any residual dye from the service port with a rag and the approved fluorescent dye cleaner GE-43872: dye cleaner.

Electronic Leak Detection

Infrared detectors operate differently than heated sensor type detectors. They detect changes in concentration of refrigerant rather than absolute concentration. If the tip is held at a detected leak for more than 5 seconds the detector will saturate and zero to that concentration and will no longer detect leaks at that concentration or less. Move tip away from the leak saturation area for 30 seconds to reset the sensitivity of the detector.

Adequate system pressure is required for effective leak detection.

  1. If system is empty install 10% of system charge.
  2. Temperature must be above 60 F.

Do not use

  1. Soap solutions (not effective for leak detection)
  2. Shop air (will introduce contamination to the refrigerant system)
  3. High pressure gasses i.e. nitrogen (may cause system damage

Air movement from the engine cooling fan can affect the detectors ability to detect leaks. Always leak test with engine off and if possible after engine has reached normal operating temperature.

  1. All fittings and components should be checked.
  2. Take care not to contaminate the probe tip if the part being tested is contaminated.
  3. No cleaners containing solvents should be used prior to using electronic leak detector.
  4. Always follow the refrigerant system around in a continuous path so that no areas of potential leaks are missed. Move the tip along the refrigerant system at a rate of no more than 3 inches per second and a distance of 3/8 inch from the surface being tested. If a leak is found, always continue to test the remainder of the system.

Follow the instructions supplied with the GE-50078: detector.

Air Conditioning (A/C) System Performance Test (V6)

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

Test Description

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
NOTE: 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 2 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures within 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
2NOTE: 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 12.7-15.2 cm (5-6 in). Select the following HVAC control settings: The A/C is ON. The coldest temperature setting The maximum blower speed Recirculation mode The instrument panel (I/P) panel outlet mode All I/P panel outlets are OPEN. Install the temperature probes of the J 43600 in the left and right center panel air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in one of the following positions: PARK (Automatic) NEUTRAL (Manual) Start the engine and warm to operating temperature. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises NOTE: Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The panel outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the panel output temperatures to the A/C Performance Table below. Does all the data recorded fall within the specified ranges of the A/C Performance Table below?Go to Step 8Go to Step 3
3If the pressures and temperatures recorded do not fall within the specified ranges: 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 . Compare the low and high side pressures and the panel output temperature to the table below. Does all the data recorded fall within the specified ranges of the table below?Go to Step 8Go to Step 4
4Do the high and low side pressures fall within the specified ranges, but the panel 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 the specified range, but the low side pressure is within or 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 - Manual
NOTE
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.
NOTE
Record the relative humidity and the ambient air temperature at the time of the test.
NOTE
Press the RESET button, before using the print function of the J 43600 . See Special Tools .

Scheme 1

Scheme 1
Ambient TemperatureRelative HumidityLow Side Service Port PressureHigh Side Service Port PressureMaximum Left Center Discharge Air Temperature
13-18°C (55-65°F)0-100%151-206 kPa (22-30 psi)957-1136 kPa (1139-165 psi)8°C (45°F)
19-24°C (66-75°F)Below 40%151-206 kPa (22-30 psi)1109-1322 kPa (161-192 psi)8°C (45°F)
Above 40%151-234 kPa (22-34 psi)1088-1336 kPa (158-194 psi)9°C (48°F)
25-29°C (76-85°F)Below 35%151-227 kPa (22-33 psi)1233-1440 kPa (183-238 psi)9°C (48°F)
35-50%165-234 kPa (24-34 psi)1240-1460 kPa (180-212 psi)9°C (48°F)
Above 50%172-252 kPa (25-37 psi)1247-1508 kPa (181-219 psi)12°C (52°F)
30-35°C (86-95°F)Below 30%172-254 kPa (25-37 psi)1329-1570 kPa (193-228 psi)12°C (52°F)
30-50%179-261 kPa (26-38 psi)1350-1632 kPa (196-237 psi)13°C (55°F)
Above 50%192-275 kPa (28-40 psi)1378-1722 kPa (200-250 psi)13°C (55°F)
36-41°C (96-105°F)Below 20%199-275 kPa (29-40 psi)1433-1667 kPa (264-325 psi)13°C (55°F)
20-40%206-282 kPa (30-41 psi)1460-1750 kPa (212-254 psi)13°C (55°F)
Above 40%213-289 kPa (31-42 psi)1522-1839 kPa (221-267 psi)14°C (57°F)
42-46°C (106-115°F)Below 20%234-303 kPa (34-44 psi)1543-1770 kPa (224-257 psi)15°C (59°F)
Above 20%241-303 kPa (35-44 psi)1591-1880 kPa (231-273 psi)15°C (59°F)
47-49°C (116-120°F)Below 30%261-330 kPa (38-48 psi)1688-1942 kPa (245-282 psi)18°C (63°F)

A/C Performance Table

Air Conditioning (A/C) System Performance Test (V8)

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
NOTE: 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 2 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures within 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
2NOTE: 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 12.7-15.2 cm (5-6 in). Select the following HVAC control settings: The A/C is ON. The coldest temperature setting The maximum blower speed Recirculation mode The instrument panel (I/P) panel outlet mode All I/P panel outlets are OPEN. Install the temperature probes of the J 43600 in the left and right center panel air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in one of the following positions: PARK (Automatic) NEUTRAL (Manual) Start the engine and warm to operating temperature. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises NOTE: Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The panel outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the panel output temperatures to the A/C Performance Table below. Does all the data recorded fall within the specified ranges of the A/C Performance Table below?Go to Step 8Go to Step 3
3If the pressures and temperatures recorded do not fall within the specified ranges: 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 . Compare the low and high side pressures and the panel output temperature to the table below. Does all the data recorded fall within the specified ranges of the table below?Go to Step 8Go to Step 4
4Do the high and low side pressures fall within the specified ranges, but the panel 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 the specified range, but the low side pressure is within or 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 - Manual
NOTE
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.
NOTE
Record the relative humidity and the ambient air temperature at the time of the test.
NOTE
Press the RESET button, before using the print function of the J 43600 . See Special Tools .
Ambient TemperatureRelative HumidityLow Side Service Port PressureHigh Side Service Port PressureMaximum Left Center Discharge Air Temperature
13-18°C (55-65°F)0-100%151-220 kPa (22-32 psi)937-1247 kPa (136-181 psi)8°C (46°F)
19-24°C (66-75°F)Below 40%151-234 kPa (22-34 psi)957-1260 kPa (139-183 psi)8°C (46°F)
Above 40%165-248 kPa (24-36 psi)1047-1350 kPa (152-196 psi)10°C (50°F)
25-29°C (76-85°F)Below 35%179-248 kPa (26-36 psi)1123-1357 kPa (163-197 psi)10°C (50°F)
35-50%168-254 kPa (27-37 psi)1171-1391 kPa (170-202 psi)10°C (50°F)
Above 50%192-261 kPa (28-38 psi)1198-1433 kPa (174-208 psi)12°C (52°F)
30-35°C (86-95°F)Below 30%199-268 kPa (29-39 psi)1247-1488 kPa (181-216 psi)13°C (54°F)
30-50%206-268 kPa (30-39 psi)1267-1508 kPa (184-219 psi)13°C (54°F)
Above 50%213-275 kPa (31-40 psi)1309-1529 kPa (190-222 psi)13°C (54°F)
36-41°C (96-105°F)Below 20%234-296 kPa (34-43 psi)1398-1632 kPa (203-337 psi)14°C (57°F)
20-40%234-296 kPa (34-43 psi)1398-1632 kPa (203-237 psi)14°C (57°F)
Above 40%234-289 kPa (34-42 psi)1419-1632 kPa (206-237 psi)14°C (57°F)
42-46°C (106-115°F)Below 20%261-323 kPa (38-47 psi)1550-1750 kPa (225-254 psi)17°C (61°F)
Above 20%261-316 kPa (38-46 psi)1550-1743 kPa (225-253 psi)17°C (61°F)
47-49°C (116-120°F)Below 30%282-337 kPa (41-49 psi)1667-1860 kPa (242-270 psi)18°C (63°F)

A/C Performance Table

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

StepActionValueYesNo
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 (V6) or Air Conditioning (A/C) System Performance Test (V8)
2Refer to the instrument panel outlet air temperatures recorded during the A/C system performance test. Does the discharge air temperature between the right and left center instrument panel outlets vary by more than 1-2°C (2-3°F)?Go to Step 7Go to Step 3
3Did the customer mention that the A/C system output temperatures are good at first, but then turn warm during extended drives?Go to Step 4Go to Step 5
4Increase engine speed to 2000 RPM. During extended operation of the A/C system, does the low side pressure decrease, possibly accompanied by heavy frost on the liquid line between the expansion device and the evaporator?Go to Air Conditioning (A/C) Diagnostics - Pressure Zone DGo to Step 5
5Refer to the pressures recorded during the A/C system performance test. WARNING: Refer to Moving Parts and Hot Surfaces Warning . Inspect for the following conditions: The high side pressure is slightly greater than the specified pressure ranges but still within Zone A on the A/C Pressure-Zone Classification Chart in the A/C System Performance Test. Refer to Air Conditioning (A/C) System Performance Test (V6) Air Conditioning (A/C) System Performance Test (V8) . The discharge line is hot. The suction line is cool. Do the listed conditions exist?Go to Step 7Go to Step 6
6Refer 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 within Zone A on the A/C Pressure-Zone Classification Chart in the A/C System Performance Test. Refer to Air Conditioning (A/C) System Performance Test (V6) Air Conditioning (A/C) System Performance Test (V8) . The discharge line is warm to hot. The suction line is cool to warm. Do the listed conditions exist?Go to Step 8Go to Diagnostic Starting Point - Vehicle
7The A/C system may be undercharged. Leak test A/C system. Refer to Leak Testing . Recharge the A/C system to specifications. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 13
8The A/C system may be contaminated. View the information screen on the J 43600 ACR 2000 Air Conditioning Service Center for detection of foreign gases in the A/C system. See Special Tools . Do foreign gases exist?Go to Step 9Go to Step 10
9Evacuate the A/C system to a scavenging tank. Refer to Refrigerant Recovery and Recharging . Recharge the A/C system to specifications. Is the action complete?Go to Step 13
10The 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 instrument panel outlet air temperatures. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Are the instrument panel outlet air temperatures within the specified ranges of the A/C Performance Test Table?Go to Step 14Go to Step 11
11The A/C system may contain too much refrigerant oil. IMPORTANT: Review the vehicle's A/C repair history. If the vehicle history shows multiple A/C repairs and is suspected of improper PAG oil balancing in the previous repairs, perform the following procedure: Drain all of the PAG oil drain bottle on the ACR 2000. Flush the A/C system. Refer to Flushing . Was more than the total system capacity of refrigerant oil recovered from the ACR 2000 oil drain bottle?120 ml (4.06 oz)Go to Step 12Go to Step 13
12Add the specified amount of refrigerant oil. Refer to Refrigerant System Specifications . Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the actions complete?Go to Step 13
13Record the low and high side pressures and the instrument panel outlet air temperature. Compare the instrument panel outlet air temperatures to those listed in the A/C System Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Are the high and low side pressures and the instrument panel outlet air temperatures within specifications?Go to Step 14
14Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Manual
IMPORTANT
Review the vehicle's A/C repair history.

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

StepActionYesNo
DEFINITION: The low side pressure is higher than normal 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 (V6) or Air Conditioning (A/C) System Performance Test (V8)
2After continued operation of the A/C system, do the low and the high side pressures equalize or become static?Go to Step 5Go to Step 3
3Refer to the pressures recorded during the A/C System Performance Test. Inspect for the following conditions: WARNING: Refer to Moving Parts and Hot Surfaces Warning . The low side pressure is equal to or greater than the specified pressure range of the A/C Performance Table. Refer to Air Conditioning (A/C) System Performance Test (V6) Air Conditioning (A/C) System Performance Test (V8) . 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 (V6) Air Conditioning (A/C) System Performance Test (V8) . The low side refrigerant line at the compressor feels cool to warm. The high side refrigerant line at the compressor feels warm to hot. Do the listed conditions exist?Go to Step 5Go to Step 4
4Refer to the pressures recorded during the A/C System Performance Test. Inspect for the following conditions: WARNING: Refer to Moving Parts and Hot Surfaces Warning . 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 (V6) Air Conditioning (A/C) System Performance Test (V8) . 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 (V6) Air Conditioning (A/C) System Performance Test (V8) . 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 5Go to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8)
5The A/C system has a low refrigerant charge. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 6
6After you perform the repairs, record the following: The low and the high side pressures The instrument panel outlet air temperature Compare the pressures and the temperature to those listed in the A/C Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Are the readings within the specified ranges found on the A/C Performance Chart?Go to Step 13Go to Step 7
7The A/C compressor is malfunctioning. Remove the expansion device and inspect for contamination. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Did you find metal flakes on the expansion device?Go to Step 9Go to Step 8
8Inspect the expansion device for a brown, powdery residue indicating desiccant in the A/C system. Is a brown, powdery residue present?Go to Step 11Go to Step 12
9Remove the compressor hose from the compressor. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Inspect for metal flake contamination at the line connections and the compressor ports. Is metal flake contamination present?Go to Step 10Go to Step 12
10Replace the A/C compressor. Refer to Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Replace the thermal expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Replace the A/C refrigerant filter. Refer to Receiver and Dehydrator Replacement . Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 13
11Flush the A/C system. Refer to Flushing . Replace the thermal expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Replace the A/C compressor. Refer to Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Replace the A/C refrigerant filter. Refer to Receiver and Dehydrator Replacement . Replace the condenser. Refer to Air Conditioning Condenser Replacement (LLT) or Air Conditioning Condenser Replacement (LS3, L99) . Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 13
12Replace the A/C compressor. Refer to Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 13
13Operate the system in order to verify the repair Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Manual

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

StepActionYesNo
DEFINITION: The low and the 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 (V6) or Air Conditioning (A/C) System Performance Test (V8)
2Start the engine. Turn ON the A/C. Inspect for proper cooling fan operation. Refer to Cooling System Description and Operation . 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 air flow Do any of these conditions exist?Go to Step 4Go to Step 6
4Repair the air flow restriction. Is the action complete?Go to Step 9
5Repair the fault to the cooling fan operation. Refer to Cooling Fan Inoperative . Is the repair complete?Go to Step 9
6WARNING: Refer to Moving Parts and Hot Surfaces Warning . Feel the inlet evaporator thermal expansion valve tube at the expansion device Feel the outlet evaporator thermal expansion valve tube at the expansion device Are the temperatures on both sides of the evaporator thermal expansion valve tube at the expansion device similar?Go to Step 7Go to Step 8
7Replace the damaged or faulty thermal expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Is the action complete?Go to Step 9
8Air is in the refrigerant system, or the system is overcharged. Refer to the view screen on J 43600 for foreign gas content in the refrigerant. See Special Tools . Recover and recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Is the action complete?Go to Step 9
9Record the low and high side pressures and the instrument panel outlet air temperature after you have performed the repairs. Compare the pressures and the instrument panel outlet air temperature to those listed in the A/C Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Are the readings within the specified ranges listed in the A/C Performance Chart?Go to Step 10Go to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8)
10Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Manual

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

StepActionYesNo
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 (V6) or Air Conditioning (A/C) System Performance Test (V8)
2WARNING: Refer to Moving Parts and Hot Surfaces Warning . Feel the liquid line before the expansion device.Is the liquid line cold before the expansion device?Go to Step 3Go to Step 8
3Feel along the surfaces of the following high side components: The compressor discharge hose The condenser The liquid line between the condenser and the expansion device Did you detect an abrupt drop in temperature along the surfaces of any of the listed components?Go to Step 7Go to Step 4
4Feel the liquid line at the expansion device location for extreme cold, possibly accompanied by heavy frost. Feel along the liquid line beyond the expansion device location for warm temperature. Is the liquid line extremely cold at the expansion device location and warm beyond the expansion device location?Go to Step 11Go to Step 5
5Feel along the surfaces of the following low side components: The evaporator thermal expansion valve tube between the expansion device and the compressor suction hose The compressor suction hose Did you feel an abrupt temperature change along the surfaces of any of the listed components?Go to Step 7Go to Step 6
6Feel along the surfaces of the low and the high side components. The evaporator thermal expansion valve tube between the expansion device and the compressor suction hose The compressor suction hose The compressor discharge hose The condenser The evaporator inlet tube between the condenser and the expansion device Are the temperatures of these components only mildly warm?Go to Step 14Go to Step 8
7Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Remove the restriction from the component, or replace the component which produced an abrupt temperature drop. Is the action complete?Go to Step 9
8Recover the refrigerant and evacuate the system. Refer to Refrigerant Recovery and Recharging . Record the weight of the recovered refrigerant. Compare the weight of the recovered refrigerant with the system capacity. Refer to Refrigerant System Specifications . Is the weight of the recovered refrigerant charge greater than 75 percent of the total system capacity?Go to Step 9Go to Step 10
9Recharge the A/C System. Refer to Refrigerant Recovery and Recharging . Is the cooling performance improved?Go to Step 21Go to Step 10
10Leak test the system. Refer to Leak Testing . Repair any leaks. Is the action complete?Go to Step 21
11The expansion device is restricted. Replace the expansion device. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . If the expansion device was restricted, note the type of debris present. Are metal flakes present?Go to Step 12Go to Step 13
12Remove the compressor hose assembly from the vehicle. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Inspect the hose for debris by blowing shop air through one end of the hose while covering the other end with a shop towel. Observe the amount of debris collected in the shop towel. Did a large amount of debris collect in the shop towel?Go to Step 18Go to Step 20
13If the expansion device was restricted with a brown or black residue, perform the following procedure: Flush the A/C System. Refer to Flushing . Replace the A/C refrigerant filter. Refer to Receiver and Dehydrator Replacement . Replace the condenser. Refer to Air Conditioning Condenser Replacement (LLT) or Air Conditioning Condenser Replacement (LS3, L99) . Are the actions complete?Go to Step 21
14Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Disconnect the compressor hose from the compressor. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Inspect for the presence of debris in the compressor suction port. Is debris present in the compressor suction port?Go to Step 15Go to Step 19
15Remove the debris from the suction port. Inspect the expansion device for damage or debris. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Did you find evidence of damage or debris?Go to Step 17Go to Step 16
16If the expansion device does not show any signs of damage or debris, perform the following procedure: Remove the compressor hose assembly from the vehicle. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Inspect the hose for debris by blowing shop air through one end of the hose while covering the other end with a shop towel. Observe the amount of debris collected in the shop towel. Did a large amount of debris collect in the shop towel?Go to Step 18Go to Step 19
17Replace the expansion device. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . If the expansion device was restricted, observe the type of debris present. Are metal flakes present?Go to Step 12Go to Step 13
18If a large amount of debris was collected in the shop towel from the suction hose, perform the following procedure: Replace the A/C condenser. Refer to Air Conditioning Condenser Replacement (LLT) or Air Conditioning Condenser Replacement (LS3, L99) . Replace the A/C refrigerant filter. Refer to Receiver and Dehydrator Replacement . Is the action complete?Go to Step 19
19Install the compressor hose assembly. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Is the action complete?Go to Step 21
20Install the compressor hose assembly. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) . Recharge the A/C system. Refer to Refrigerant Recovery and Recharging . Are the actions complete?Go to Step 21
21Record the low and the high side pressures and the instrument panel outlet air temperature after you perform the repairs. Compare the pressures and the instrument panel outlet air temperature to those listed in the A/C Performance Chart. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Are the readings within the specified ranges as shown on the A/C Performance Chart?Go to Step 22Go to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8)
22Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Symptoms - HVAC Systems - Manual

Heating Performance Diagnostic

StepActionYesNo
DEFINITION: Heating system performance.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Manual
2Start the engine. Allow the engine to idle. Does the engine reach a normal operating temperature?Go to Step 3Go to Step 9
3WARNING: Refer to Moving Parts and Hot Surfaces Warning . 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 near 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 I/P 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 I/P 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 Heating and Air Conditioning System Description and Operation . 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 near 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. Refer to Heater Core Replacement . Is the repair complete?Go to Step 10
9Repair the low engine temperature concern. Refer to Engine Fails To Reach Normal Operating Temperature . 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

Defrosting Insufficient

StepActionYesNo
DEFINITION: Time required to defrost the windshield is longer than normal.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Manual
2Turn ignition to ON.. Select the DEFROST mode. Select the maximum blower speed. Does sufficient air flow from the defroster outlets?Go to Step 3Go to Step 6
3Select the minimum blower speed. Select the maximum temperature setting. WARNING: Refer to Moving Parts and Hot Surfaces Warning . 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 7Go to Step 4
4Perform the A/C system performance test. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Is the A/C system operating within the specifications?Go to Step 5Go to Step 8
5Inspect for correct operation of the air inlet door. Is the air inlet door operating correctly?Go to Step 10Go to Step 9
6Repair the air delivery concern. Refer to Diagnostic Starting Point - Vehicle . Is the repair complete?Go to Step 10
7Repair the heating concern. Refer to Heating Performance Diagnostic . Is the repair complete?Go to Step 10
8Repair the A/C performance concern. Refer to Air Conditioning (A/C) System Performance Test (V6) or Air Conditioning (A/C) System Performance Test (V8) . Is the repair complete?Go to Step 10
9Repair the air inlet door concern. Refer to Air Inlet Housing Replacement . Is the repair complete?Go to Step 10
10Operate the system in order to verify the repair. Did you find and correct the problem?System OKGo to Step 2

Noise Diagnosis - Blower Motor

StepActionYesNo
DEFINITION: Noise originating from the blower motor.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Manual
2Inspect the air inlet grille for debris. Is debris present?Go to Step 8Go to Step 3
3Sit 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 and modes in order to determine where and when the noise occurs. Is a noise evident during the blower operation?Go to Step 4Go to Step 11
4Inspect for excessive vibration at each blower motor speed by feeling the blower case. Is excess vibration present?Go to Step 6Go to Step 5
5Listen to the blower motor at each speed. Is the blower motor making a squeaking or chirping noise?Go to Step 9Go to Step 11
6Remove the blower motor. Refer to Blower Motor Replacement . Inspect the blower motor impeller for deposits of foreign material. Inspect the blower motor for deposits of foreign material. Did you find any foreign material on the blower motor or blower motor impeller?Go to Step 8Go to Step 7
7Inspect 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 9Go to Step 10
8Remove the foreign material. Is the action complete?Go to Step 10
9Replace the blower motor. Refer to Blower Motor Replacement . Is the repair complete?Go to Step 11
10Install the blower motor. Refer to Blower Motor Replacement . Is the action complete?Go to Step 11
11Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 2

Air Conditioning Compressor Oil Diagnosis

ConditionCorrective Action
NOTE: To avoid repeat compressor failure, always inspect the condition of the refrigerant oil and take the appropriate corrective action before installing the replacement compressor.
Clean Oil no debris presentNo corrective action necessary.
Clean Oil with debris presentInspect the suction port of the replacement compressor for presence of a suction screen. If the replacement compressor does NOT contain a suction screen, install suction screen in the line. Replace desiccant or component containing the desiccant. Replace desiccant filter if applicable. Remove and inspect high pressure side filter (if applicable). Remove, inspect, clean, or replace orifice tube. If the system has a front orifice tube and is equipped with a filter in the rear auxiliary line, remove, inspect, clean, or replace the filter. If the system has a front orifice tube and is not equipped with a filter in the rear auxiliary line, remove the filter in the auxiliary TXV and Install a universal inline A/C Filter P/N 89016656 (AC Delco P/N 15-10413) as close to the rear TXV as possible.
Dark brown/black and/or pungent/unusual odor with no debris presentReplace desiccant or component containing the desiccant. Replace desiccant filter if applicable. Flush refrigerant system.
Dark brown/black and/or pungent/unusual odor with debris presentReplace desiccant or component containing the desiccant. Replace desiccant filter if applicable. Flush refrigerant system. Inspect the suction port of the replacement compressor for presence of a suction screen. If the replacement compressor does NOT contain a suction screen, install suction screen. Remove and inspect high pressure side filter (if applicable). Remove, inspect, clean, or replace orifice tube. If the system has a front orifice tube and is equipped with a filter in the rear auxiliary line, remove, inspect, clean, or replace the filter. If the system has a front orifice tube and is not equipped with a filter in the rear auxiliary line, remove the filter in the auxiliary TXV and install a universal inline A/C Filter P/N 89016656 (AC Delco P/N 15-10413) as close to the rear TXV as possible.
Oil OverchargeFlush refrigerant system.
Refrigerant ContaminationFlush refrigerant system.
Hybrid Polyolester Refrigerant Oil (POE) ContaminationFlush refrigerant system. Replace desiccant or component containing the desiccant. Replace desiccant filter if applicable.
NOTE
To avoid repeat compressor failure, always inspect the condition of the refrigerant oil and take the appropriate corrective action before installing the replacement compressor.

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 Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Manual
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 Falls Off and Excessive Wear Diagnosis for the 3.6L engine and Drive Belt Falls Off and Excessive Wear Diagnosis for the 6.2L engine. Is the drive belt excessively worn?Go to Step 18Go to Step 4
4Inspect the drive belt tensioner. Refer to Drive Belt Tensioner Diagnosis for the 3.6L engine and Drive Belt Tensioner Diagnosis for the 6.2L engine.. Is the drive belt tension correct?Go to Step 5Go to Step 19
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 A/C compressor locked up?Go to Step 23Go to Step 7
7Is the A/C compressor clutch slipping?Go to Step 23Go to Step 8
8WARNING: Refer to Moving Parts and Hot Surfaces Warning . Using 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 a component of the A/C system touching another component. Are any of the A/C components grounding out and causing a vibration 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 24
14Idle the engine in PARK or Neutral with the parking brake ON 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 Specifications . 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 23Go to Step 25
17Repair the oil leak. Refer to the appropriate repair procedure for the 3.6L or 6.2L engines. Is the repair complete?Go to Step 25
18Replace the accessory drive belt. Refer to Drive Belt Replacement - Accessory . Is the replacement complete?Go to Step 25
19Replace the accessory drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Accessory . 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 Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Is the replacement complete?Go to Step 25
24The concern may be caused by an engine related component. Refer to Vibration Analysis - Engine . 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 - 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 - Manual
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 I/P Assembly. Refer to Instrument Panel Tie Bar Replacement . Is the action complete?Go to Step 7
7Inspect the mode valve assembly 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 valve assembly and temperature doors and seals for warping or cracking. Are the mode valve assembly and temperature doors in normal condition?Go to Step 11Go to Step 9
9Replace the appropriate component. 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 I/P assembly. Refer to Instrument Panel Tie Bar Replacement . 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

Odor Diagnosis

StepActionYesNo
DEFINITION: Odor originating or noticed through the HVAC system.
1Were you sent here from Symptoms or another diagnostic table?Go to Step 2Go to Symptoms - HVAC Systems - Manual
2Sit 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 3Go to Step 8
3Inspect the HVAC filter and the air inlet grille for debris. Is debris present?Go to Step 4Go to Step 5
4Remove any debris. Is the action complete?Go to Step 15
5Inspect for wet carpeting. Is the carpet wet?Go to Step 6Go to Step 8
6Inspect for the following conditions: Water leaks around the windshield Blockage of the HVAC module drain Leaks around the door seals Is a leak present?Go to Step 7Go to Step 15
7Repair the leak as necessary. Is the repair complete?Go to Step 15
8Does the odor have a coolant smell?Go to Step 9Go to Step 12
9Inspect the cooling system for leaks. Refer to Loss of Coolant . Is a leak present?Go to Step 10Go to Step 12
10Inspect for coolant leaking inside the vehicle or for a film build-up on the windshield. Is the condition present?Go to Step 11Go to Step 15
11Inspect and if necessary replace the heater core. Refer to Heater Core Replacement . Is the repair complete?Go to Step 15
12Does the odor have an oily smell?Go to Step 13Go to Step 15
13Inspect the engine compartment for any leaks. Refer to the following procedures: Oil Leak Diagnosis for 3.6L or Oil Pressure Diagnosis and Testing for 6.2L engine Fluid Leak Diagnosis Power Steering Fluid Leaks Repair any oil leaks. Is the repair complete?Go to Step 15
14A 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 15
15Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 2

Eliminating Air Conditioning Odor

  1. Odors may be emitted from the air conditioning system primarily at start up in hot, humid climates. The following conditions may cause the odor: Debris is present in the HVAC module assembly. Microbial growth on the evaporator core.
  2. 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 addressed. Perform the following procedure: Remove evaporator core. Refer to «Air Conditioning Evaporator Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Clean evaporator core with a solution of 40% vinegar and 60% water. Refit evaporator core. Refer to «Air Conditioning Evaporator Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. J 45037 A/C Oil Injector. See «Special Tools»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
WARNINGTo prevent personal injury, avoid breathing A/C Refrigerant and lubricant vapor or mist. Work in a well ventilated area. To remove refrigerant from the A/C System, use service equipment designed for recovery that is certified to meet the requirements of the appropriate SAE Standards. If an accidental system discharge occurs, ventilate the work area before continuing service. Additional health and safety information may be obtained from the refrigerant, refrigerant recovery, and lubricant manufacturers.
WARNINGFor personal protection, goggles and lint-free gloves should be worn and a clean cloth wrapped around fittings, valves, and connections when doing work that includes opening the refrigerant system. If refrigerant 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.
CAUTIONYou must replace the desiccant if the A/C refrigerant system has been open to atmosphere for more than four hours, or if the A/C refrigerant oil has been contaminated. Failure to replace the desiccant will result in damage to the A/C refrigerant system.
CAUTIONR-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.
CAUTIONTo avoid system damage use only R-134a dedicated tools when servicing the A/C system.
CAUTIONUse 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.
CAUTIONR-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. 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. See Special Tools .

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. Always recharge the A/C System with the proper amount of R-134a. Refer to Refrigerant System Specifications for the correct amount. See Special Tools .

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 . For the proper quantities of oil to add to the A/C refrigerant system, refer to Refrigerant System Specifications . See Special Tools .

Tools Required

  1. J 41447: R-134A A/C Tracer Dye - Box of 24
  2. J 42220: Universal 12V Leak Detection Lamp
  3. J 43600: ACR 2000 Air Conditioning Service Center
  4. J 45268: A/C Flushing Adapter Kit

Note. Flushing with the J 43600: ACR 2000 Air Conditioning Service Center 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

Forward Flushing Setup

  1. Install both J 45268-9 (2) onto the J 45268-10 (3).
  2. Install the J 45268-7 (4) onto the suction side of the J 45268-10 (3).
  3. Install the J 45268-8 (1) onto the discharge side of the J 45268-10 (3).

Reverse Flushing Setup

  1. Install both J 45268-9 (2) onto the J 45268-10 (3).
  2. Install the J 45268-8 (1) onto the suction side of the J 45268-10 (3).
  3. Install the J 45268-7 (4) onto the discharge side of the J 45268-10 (3).

Flush Procedure

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove the TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. Install the stud onto the J 45268-115.
  4. Install new sealing washers onto the evaporator core. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Install J 45268-115 in place of the TXV.
  6. Install TXV mounting bolts and tighten to 7 N.m (62 lb in).
  7. Install new washers onto the rear evaporator line assembly. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Connect the rear evaporator line assembly to the J 45268-115.
  9. Install the TXV block fitting nut and tighten to 20 N.m (15 lb ft).
  10. Remove the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  11. Service the filter with ACDelco P/N GF 470, before each flush.
  12. Install the J 45268-10 to the compressor hose assembly.
  13. Connect the J 45268-1 flush filter to the J 45268-7 flush adapter.
  14. Connect the blue hose from the J 43600: ACR 2000 Air Conditioning Service Center to J 45268-1 flush filter adapter.
  15. Connect the red hose from the J 43600: ACR 2000 Air Conditioning Service Center to J 45268-8 flush adapter.
  16. Flush the A/C system. Follow the instructions supplied with the J 43600: ACR 2000 Air Conditioning Service Center.
  17. Disconnect the red hose from the J 43600: ACR 2000 Air Conditioning Service Center to J 45268-8 flush adapter.
  18. Disconnect the blue hose from the J 43600: ACR 2000 Air Conditioning Service Center to J 45268-1 flush filter adapter.
  19. Disconnect the J 45268-1 flush filter from the J 45268-10 flush adapter.
  20. Remove the J 45268-10 from the compressor hose assembly.
  21. If you will reinstall the removed A/C compressor, perform the following procedure: Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. Add the total system capacity of PAG oil to the crankcase of the A/C compressor. Refer to «Refrigerant System Specifications»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-specifications) . NOTE: Flushing will remove the fluorescent leak detection dye from the A/C system. Add one bottle of J 41447: R-134A A/C Tracer Dye - Box of 24 directly to the A/C compressor.
  22. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  23. Remove the TXV block fitting nut.
  24. Disconnect the rear evaporator line assembly from the J 45268-115.
  25. Remove the TXV bolts retaining the J 45268-115.
  26. Remove the J 45268-115.
  27. Inspect the TXV for debris. Clean or replace as needed.
  28. Install the TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  29. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  30. Leak test the fittings using J 42220: Universal 12V Leak Detection Lamp.

Draining Procedure

  1. Drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.
  2. Rotate the compressor shaft to assist in draining the compressor.
  3. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
  4. Inspect oil drained from removed compressor. Refer to «Air Conditioning Compressor Oil Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__air-conditioning-compressor-oil-diagnosis) .
  5. Properly discard the used refrigerant oil.
  6. Clean the graduated cylinder.
  7. Drain bolt and drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.
  8. Rotate the compressor shaft to assist in draining the compressor.

Balancing Procedure

  1. Refer to the amount of refrigerant oil recorded during the compressor removal.
  2. If the amount of oil recorded from the removed compressor is less than or equal to 75 ml (2.5 fl. oz), add 75 ml of the new PAG oil back into the new compressor through the compressor suction port.
  3. If the amount of oil recorded from the removed compressor is greater than 75 ml (2.5 fl. oz), add the equivalent amount of the new PAG oil back into the new compressor through the compressor suction port.
  4. Rotate the clutch driver three times to lubricate the internal compressor components.
  5. If necessary, refer to «Refrigerant System Specifications»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-specifications) .

Scheme 2

Scheme 2: Air Conditioning Compressor Replacement (LLT)
CalloutComponent Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the A/C compressor belt. Refer to Drive Belt Replacement . Remove the A/C compressor hose. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) .
1A/C Compressor Stud CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2A/C Compressor Nut CAUTION: Refer to Fastener Caution . Tighten: 22 N.m (16 lb ft)
3A/C Compressor Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 22 N.m (16 lb ft)
4A/C Compressor Procedure If an internal mechanical failure is suspected within the A/C compressor that creates metal debris, inspect and clean/or replace the R/D filter screen within the A/C condenser and install a suction screen to the A/C compressor line suction port. Remove and discard seal. Refer to Air Conditioning Compressor Hose Seal Replacement .
CAUTION
Refer to Fastener Caution .
CAUTION
Refer to Fastener Caution .
CAUTION
Refer to Fastener Caution .

Scheme 3

Scheme 3: Air Conditioning Compressor Replacement (LS3, L99)
CalloutComponent Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the A/C compressor belt. Refer to Air Conditioning Compressor Belt Replacement . Remove the A/C compressor hose. Refer to Air Conditioning Compressor Hose Replacement (LLT) or Air Conditioning Compressor Hose Replacement (LS3, L99) .
1A/C Compressor Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten: 50 N.m (37 lb ft)
2A/C Compressor Procedure If an internal mechanical failure is suspected within the A/C compressor that creates metal debris, inspect and clean/or replace the R/D filter screen within the A/C condenser and install a suction screen to the A/C compressor line suction port. Remove and discard seal. Refer to Air Conditioning Compressor Hose Seal Replacement .
CAUTION
Refer to Fastener Caution .

Scheme 4

Scheme 4: Compressor Clutch Plate and Hub Assembly Removal (LLT)
CalloutComponent Name
Preliminary Procedures Remove the drive belt. Refer to Drive Belt Replacement . Remove the air conditioning compressor if necessary. Refer to Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Disconnect the electrical connector from the air conditioning compressor.
1Air Conditioning Compressor Pulley Bolt CAUTION: Refer to Fastener Caution . Tighten: 12 N.m (106 lb in)
2Air Conditioning Clutch Drive Plate Procedure: Measure and adjust the air conditioning compressor clutch drive plate per specification. Refer to Air Conditioning Clutch Drive Plate Adjustment .
3Air Conditioning Compressor Clutch Drive Plate Adjustment Shim
4Air Conditioning Compressor Clutch Pulley Snap Ring Procedure: Ensure the clutch pulley snap ring is installed with the flat side toward the air compressor.
5Air Conditioning Compressor Clutch Pulley
6Air Conditioning Compressor Clutch Coil Snap Ring Procedure: Ensure the clutch coil snap ring is installed with the flat side toward the air compressor.
7Air Conditioning Compressor Clutch Coil
CAUTION
Refer to Fastener Caution .

Scheme 5

Scheme 5: Compressor Clutch Plate and Hub Assembly Removal (LS3, L99)
CalloutComponent Name
Preliminary Procedures Remove the air conditioning compressor belt. Refer to Air Conditioning Compressor Belt Replacement . Remove the air conditioning compressor if necessary. Refer to Air Conditioning Compressor Replacement (LLT) or Air Conditioning Compressor Replacement (LS3, L99) . Disconnect the electrical connector from the air conditioning compressor.
1Air Conditioning Compressor Pulley Bolt CAUTION: Refer to Fastener Caution . Tighten: 12 N.m (106 lb in)
2Air Conditioning Clutch Drive Plate Procedure: Measure and adjust the air conditioning compressor clutch drive plate per specification. Refer to Air Conditioning Clutch Drive Plate Adjustment .
3Air Conditioning Compressor Clutch Drive Plate Adjustment Shim
4Air Conditioning Compressor Clutch Pulley Snap Ring Procedure: Ensure the clutch pulley snap ring is installed with the flat side toward the air compressor.
5Air Conditioning Compressor Clutch Pulley
6Air Conditioning Compressor Clutch Coil Snap Ring Procedure: Ensure the clutch coil snap ring is installed with the flat side toward the air compressor.
7Air Conditioning Compressor Clutch Coil
CAUTION
Refer to Fastener Caution .

Air Conditioning Clutch Drive Plate Adjustment

  1. Install the clutch plate assembly.
  2. Measure the air gap between the pulley and the drive plate. Adjust the shims to achieve a 0.30-0.60 mm (0.011-0.023 in) air gap.
  3. Install the clutch plate retaining bolt and tighten to 12 N.m (106 lb in).

Removal Procedure

  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.

Installation Procedure

  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. Remove the seal washer from the A/C refrigerant component.
  2. Inspect the seal washer for any signs of damage.
  3. Inspect the A/C refrigerant components for damage or burrs. Repair or replace as necessary.
  4. Discard the sealing washer.
  1. Inspect the new seal washer for any signs of cracks, cuts, or damage. Do not use a damaged seal washer.
  2. Using a lint-free clean, dry cloth, clean the sealing surfaces of the A/C refrigerant components.
  3. Carefully install the new seal washer onto the A/C refrigerant component.
  4. The washer must completely bottom against the surface of the fitting.
  5. Assemble the remaining A/C refrigerant components. Refer to the appropriate repair procedure.
  1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove the front intake manifold cover. Refer to «Intake Manifold Cover Replacement - Front»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  4. Disconnect the refrigerant pressure sensor electrical connector.
  5. Remove compressor hose nut (1).
  6. Remove A/C compressor hose (2) from thermal expansion valve tube.
  7. Remove compressor hose bolt (1).
  8. Remove A/C compressor hose (2) from compressor.
  9. Remove the A/C compressor hose nut (1).
  10. Remove A/C compressor hose (2) from condenser.
  11. Remove A/C compressor hose from vehicle and discard sealing washers.
  1. Install new sealing washers to A/C compressor hose. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install A/C compressor hose (2) to condenser.
  3. Install A/C compressor hose nut (1) and tighten to 20 N.m (15 lb ft).
  4. Install A/C compressor hose (2) to compressor.
  5. Install A/C compressor hose nut (1) and tighten to 20 N.m (15 lb ft).
  6. Install A/C compressor hose (2) to thermal expansion valve tube.
  7. Install compressor hose nut (1) and tighten to 20 N.m (15 lb ft).
  8. Connect the refrigerant pressure sensor electrical connector.
  9. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  10. Install the front intake manifold cover. Refer to «Intake Manifold Cover Replacement - Front»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
  11. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  4. Disconnect the refrigerant pressure sensor electrical connector.
  5. Remove compressor hose nut (1).
  6. Remove A/C compressor hose (2) from thermal expansion valve tube.
  7. Remove compressor hose bolt (1).
  8. Remove the A/C compressor hose nut (2) from the engine.
  9. Remove A/C compressor hose (3) from compressor and engine.
  10. Remove the A/C compressor hose nut (1).
  11. Remove A/C compressor hose (2) from condenser.
  12. Remove A/C compressor hose from vehicle and discard sealing washers.
  1. Install new sealing washers to A/C compressor hose. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  2. Install A/C compressor hose (2) to condenser.
  3. Install A/C compressor hose nut (1) and tighten to 18 N.m (13 lb ft).
  4. Install A/C compressor hose (3) to compressor and engine.
  5. Install A/C compressor hose nut (2) to engine and tighten to 9 N.m (7 lb ft).
  6. Install compressor hose bolt (1) and tighten to 18 N.m (13 lb ft).
  7. Install A/C compressor hose (2) to thermal expansion valve tube.
  8. Install compressor hose nut (1) and tighten to 18 N.m (13 lb ft).
  9. Connect the refrigerant pressure sensor electrical connector.
  10. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  11. Install engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  12. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove the rear intake manifold cover. Refer to «Intake Manifold Cover Replacement - Rear»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  4. Disconnect the compressor hose from the A/C evaporator thermal expansion valve tube and reposition. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove A/C evaporator thermal expansion valve tube nut (1).
  6. Remove A/C evaporator thermal expansion valve tube (2) from HVAC module.
  7. Remove A/C evaporator thermal expansion valve tube nut (1).
  8. Remove A/C evaporator thermal expansion valve tube (2) from condenser.
  9. Remove A/C evaporator thermal expansion valve tube clips (1).
  10. Remove A/C evaporator thermal expansion valve tube (2) from body.
  11. Remove A/C evaporator thermal expansion valve tube from vehicle and discard sealing washers.
  1. Install new sealing washers to A/C evaporator thermal expansion valve tube. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install A/C evaporator thermal expansion valve tube clips (1) to body.
  3. Install A/C evaporator thermal expansion valve tube (2) to condenser.
  4. Install A/C evaporator thermal expansion valve tube nut (1) and tighten to 20 N.m (15 lb ft).
  5. Install A/C evaporator thermal expansion valve tube (2) to thermal expansion valve tube.
  6. Install A/C evaporator thermal expansion valve tube nut (1) and tighten to 19 N.m (14 lb ft).
  7. Connect the compressor hose to the A/C evaporator thermal expansion valve tube. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  9. Install the rear intake manifold cover. Refer to «Intake Manifold Cover Replacement - Rear»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-on-vehicle-1-of-2) .
  10. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Remove engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  3. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  4. Disconnect the compressor hose from the A/C evaporator thermal expansion valve tube and reposition. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove A/C evaporator thermal expansion valve tube nut (1).
  6. Remove A/C evaporator thermal expansion valve tube (2) from HVAC module.
  7. Remove A/C evaporator thermal expansion valve tube nut (1).
  8. Remove A/C evaporator thermal expansion valve tube (2) from condenser.
  9. Remove A/C evaporator thermal expansion valve tube clips (1).
  10. Remove A/C evaporator thermal expansion valve tube (2) from body.
  11. Remove A/C evaporator thermal expansion valve tube from vehicle and discard sealing washers.
  1. Install new sealing washers to A/C evaporator thermal expansion valve tube. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Install A/C evaporator thermal expansion valve tube clips (1) to body.
  3. Install A/C evaporator thermal expansion valve tube (2) to condenser.
  4. Install A/C evaporator thermal expansion valve tube nut (1) and tighten to 20 N.m (15 lb ft).
  5. Install A/C evaporator thermal expansion valve tube (2) to thermal expansion valve tube.
  6. Install A/C evaporator thermal expansion valve tube nut (1) and tighten to 19 N.m (14 lb ft).
  7. Connect the compressor hose to the A/C evaporator thermal expansion valve tube. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  8. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-36l-repair-instructions) .
  9. Install the engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  10. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  1. J 39400-A: Halogen Leak Detector
  2. J 46246: Valve Core Removal Tool
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  2. Use J 46246: Valve Core Removal Tool or equivalent to remove the valve core.
  1. Use J 46246: Valve Core Removal Tool or equivalent to install and tighten the valve core.
  2. Evacuate and charge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  3. Test the affected A/C fittings for leaks using J 39400-A: Halogen Leak Detector.

Scheme 6

Scheme 6: Receiver and Dehydrator Replacement
CalloutComponent Name
Preliminary Procedure: Remove the condenser. Refer to Air Conditioning Condenser Replacement (LLT) or Air Conditioning Condenser Replacement (LS3, L99) .
1Receiver and Dehydrator Cover CAUTION: Refer to Fastener Caution . Tighten: 3 N.m (26 lb in)
2Receiver and Dehydrator Snap Ring
3Receiver and Dehydrator Plug
4A/C Refrigerant Dryer
5A/C Refrigerant Filter
CAUTION
Refer to Fastener Caution .

Scheme 7

Scheme 7: Air Conditioning Evaporator Thermal Expansion Valve Replacement
CalloutComponent Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Remove the air conditioning evaporator thermal expansion valve tube. Refer to Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT) or Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99) .
1Thermal Expansion Valve Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 6 N.m (53 lb in)
2Thermal Expansion Valve Tip: Remove and discard the sealing washers. Refer to Air Conditioning Compressor Hose Seal Replacement .
CAUTION
Refer to Fastener Caution .

Scheme 8

Scheme 8: Air Conditioning Refrigerant High Pressure Service Valve Replacement
CalloutComponent Name
Preliminary Procedures Remove the service port cap. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging
1High Side Pressure Fitting. CAUTION: Refer to Fastener Caution . Procedure Use the J 39037: Charge Valve Octagon Socket to remove the high side pressure fitting. Replace the O-ring. Refer to Air Conditioning O-Ring Seal Replacement Tighten: 2 N.m (53 lb in) Special Tools: J 39037: Charge Valve Octagon Socket
CAUTION
Refer to Fastener Caution .

Scheme 9

Scheme 9: Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (LLT)
CalloutComponent Name
Preliminary Procedures: Disconnect the electrical connector from the pressure sensor.
1A/C Refrigerant Pressure Sensor CAUTION: Refer to Fastener Caution . Tip: Remove and discard the O-ring. Refer to Air Conditioning O-Ring Seal Replacement Tighten: 6 N.m (53 lb in)
CAUTION
Refer to Fastener Caution .

Scheme 10

Scheme 10: Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (LS3, L99)
CalloutComponent Name
Preliminary Procedures: Disconnect the electrical connector from the pressure sensor.
1A/C Refrigerant Pressure Sensor CAUTION: Refer to Fastener Caution . Tip: Remove and discard the O-ring. Refer to Air Conditioning O-Ring Seal Replacement Tighten: 6 N.m (53 lb in)
CAUTION
Refer to Fastener Caution .

Scheme 11

Scheme 11: Ambient Air Temperature Sensor Replacement
CalloutComponent Name
Preliminary Procedure: Remove Front Bumper Fascia Upper Support. Refer to Front Bumper Fascia Upper Support Replacement .
1Ambient Air Temperature Sensor Procedure Disconnect the electrical connector. Unsnap the temperature sensor from the ai deflection/baffler.

Scheme 12

Scheme 12: Evaporator Air Temperature Sensor Replacement
CalloutComponent Name
Preliminary Procedures Remove the right floor front air duct. Refer to Floor Front Air Outlet Duct Replacement (Right Side) or Floor Front Air Outlet Duct Replacement (Left Side) . Reposition any wiring or hoses to gain access to evaporator temperature sensor.
1Evaporator Temperature Sensor Procedure Disconnect the wiring connector Rotate sensor 1/4 turn counter clock wise to remove
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  2. Remove the radiator. Refer to «Radiator Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Radiator Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system)
  3. Disconnect the air conditioning compressor hose from the condenser. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  4. Disconnect the air conditioning evaporator thermal expansion valve tube from the condenser. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  5. Disconnect the power steering gear outlet hose form the power steering cooler. Plug the power steering cooler. Plug the power steering gear outlet hose. Refer to «Power Steering Gear Outlet Pipe/Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  6. Disconnect the power steering fluid cooler outlet hose from the power steering cooler. Plug the power steering cooler outlet hose. Refer to «Fluid Cooler Outlet Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  7. Remove the air conditioning condenser bolts (1).
  8. Remove the air conditioning condenser (2).
  1. Install the air conditioning condenser (2).
  2. Install the air conditioning condenser bolts (1) and tighten to 9 N.m (80 lb in).
  3. Plug the outlet of the power steering fluid cooler.
  4. Remove the plug from the power steering gear outlet hose and connect it to the condenser inlet. Secure using the clamp. Refer to «Power Steering Gear Outlet Pipe/Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  5. Remove plug from cooler outlet hose. When fluid begins to flow from the hose, cap the hose using your thumb/finger. Remove the cap on the cooler and when fluid starts to flow from the cooler, connect the hose to the cooler. Secure using clamp. Refer to «Fluid Cooler Outlet Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  6. Connect the air conditioning evaporator thermal expansion valve tube to the condenser. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  7. Connect the air conditioning compressor hose to the condenser. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  8. Install the radiator. Refer to «Radiator Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Radiator Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system)
  9. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  10. Bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  2. Remove the radiator. Refer to «Radiator Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Radiator Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system)
  3. Disconnect the air conditioning compressor hose from the condenser. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  4. Disconnect the air conditioning evaporator thermal expansion valve tube from the condenser. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  5. Disconnect the power steering gear outlet hose form the power steering cooler. Plug the power steering cooler. Plug the power steering gear outlet hose. Refer to «Power Steering Gear Outlet Pipe/Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  6. Disconnect the power steering fluid cooler outlet hose from the power steering cooler. Plug the power steering cooler outlet hose. Refer to «Fluid Cooler Outlet Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  7. Remove the air conditioning condenser bolts (1).
  8. Remove the air conditioning condenser (2).
  1. Install the air conditioning condenser (2).
  2. Install the air conditioning condenser bolts (1) and tighten to 9 N.m (80 lb in).
  3. Plug the outlet of the power steering fluid cooler.
  4. Remove the plug from the power steering gear outlet hose and connect it to the condenser inlet. Secure using the clamp. Refer to «Power Steering Gear Outlet Pipe/Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  5. Remove plug from cooler outlet hose. When fluid begins to flow from the hose, cap the hose using your thumb/finger. Remove the cap on the cooler and when fluid starts to flow from the cooler, connect the hose to the cooler. Secure using clamp. Refer to «Fluid Cooler Outlet Hose Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)
  6. Connect the air conditioning evaporator thermal expansion valve tube to the condenser. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  7. Connect the air conditioning compressor hose to the condenser. Refer to «Air Conditioning Compressor Hose Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Air Conditioning Compressor Hose Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  8. Install the radiator. Refer to «Radiator Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Radiator Replacement (LS3, L99)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system)
  9. Evacuate and charge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
  10. Bleed the power steering system. Refer to «Power Steering System Bleeding»(/chevrolet/camaro/v-2009-2013/remont/manual-power-steering/#power-steering-system)

Scheme 13

Scheme 13: Heater and Air Conditioning Evaporator Module Replacement
CalloutComponent Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Drain the cooling system. Refer to Cooling System Draining and Filling (LS3, L99 Static Fill) or Cooling System Draining and Filling (LLT Static Fill) or Cooling System Draining and Filling (GE 47716) . Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement . Remove the instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement . Disconnect the HVAC module electrical connectors. Remove the air conditioning evaporator thermal expansion valve tube. Refer to Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LLT) or Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement (LS3, L99) . Remove the heater outlet hose. Refer to Heater Outlet Hose Replacement (LLT) . Remove the heater inlet hose. Refer to Heater Inlet Hose Replacement (LLT) .
1HVAC Module Assembly Fastener (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2HVAC Module Assembly
CAUTION
Refer to Fastener Caution .

Scheme 14

Scheme 14: Heater Lower Case Replacement
CalloutComponent Name
Preliminary Procedure Remove the instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement . Remove HVAC Module. Refer to Air Conditioning and Heater Module Assembly Removal and Installation .
1Cover Assembly Screw - Heater (Qty: 12) Tighten: 1.5 N.m (13 lb in)
2Heater Cover Assembly

Scheme 15

Scheme 15: Blower Front Case Replacement
CalloutComponent Name
Preliminary Procedures Remove instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement . Remove blower motor control module. Refer to Blower Motor Control Module Replacement .
1Blower Front Case Replacement CAUTION: Refer to Fastener Caution . Procedure Remove blower motor. Refer to Blower Motor Replacement . Remove the 8 fasteners (1) securing front case. Remove front case. Tighten: 1.4 N.m (12 lb in)
CAUTION
Refer to Fastener Caution .

Air Conditioning and Heater Module Assembly Removal and Installation

CalloutComponent Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Remove the heater inlet hose from the heater core tube. Refer to Heater Inlet Hose Replacement (LLT) . Remove the heater outlet hose from the heater core tube. Refer to Heater Outlet Hose Replacement (LLT) . Remove the evaporator hose assembly from the thermal expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement . Remove the instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement .
1Heater and Air Conditioning Evaporator and Blower Module Fastener (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Air Conditioning and Heater Module Assembly Procedure: With the aid of an assistant, remove the heater and air conditioning evaporator and blower module from the vehicle.
CAUTION
Refer to Fastener Caution .
  1. Remove the HVAC module assembly. Refer to «Air Conditioning and Heater Module Assembly Removal and Installation»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__air-conditioning-and-heater-module-assembly) .
  2. Remove the lower HVAC module case fasteners (2).
  3. Remove the lower HVAC module case.
  4. Remove the evaporator air temperature sensor Refer to «Evaporator Air Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Remove the evaporator.
  1. If replacing the evaporator, add the specific amount of PAG® oil directly to the evaporator. Refer to «Refrigerant System Specifications»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-specifications) .
  2. Install the evaporator.
  3. Install new sealing washers. Refer to «Air Conditioning Compressor Hose Seal Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  4. Install the evaporator air temperature sensor Refer to «Evaporator Air Temperature Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Install the lower HVAC module case.
  6. Install the lower HVAC module case screws and tighten to 1.5 N.m (13 lb in).
  7. Install the HVAC module assembly. Refer to «Air Conditioning and Heater Module Assembly Removal and Installation»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__air-conditioning-and-heater-module-assembly) .

J 38185: Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
  2. Disengage tension on the heater inlet hose clamp (1) at the engine using J 38185: Hose Clamp Pliers.
  3. Remove the heater inlet hose (2) from the engine.
  4. Disengage tension on the heater inlet hose clamp (1) at the heater core using J 38185: Hose Clamp Pliers.
  5. Remove the heater inlet hose (2) from the heater core.
  6. Remove the heater inlet hose from the vehicle.
  1. Install heater inlet hose to the vehicle.
  2. Install the heater inlet hose (2) to the heater core.
  3. Engage tension on the heater inlet hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
  4. Install the heater inlet hose (2) to the engine.
  5. Engage tension on the heater inlet hose clamp (1) at the engine using J 38185: Hose Clamp Pliers.
  6. Fill the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
  2. Remove the engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle)
  3. Disengage tension on the heater inlet and outlet hose clamps (1) at the heater core using J 38185: Hose Clamp Pliers.
  4. Remove the heater inlet and outlet hose (2) from the heater core.
  5. Disengage tension on the heater inlet and outlet hose clamps (1) at the engine using J 38185: Hose Clamp Pliers.
  6. Remove the heater inlet and outlet hose (2) from the vehicle.
  1. Install heater inlet and outlet hose to the vehicle.
  2. Engage tension on the heater inlet and outlet hose clamps (2) at the engine using J 38185: Hose Clamp Pliers.
  3. Install the heater inlet and outlet hose (2) to the heater core.
  4. Engage tension on the heater inlet and outlet hose clamps (1) at the heater core using J 38185: Hose Clamp Pliers.
  5. Install the engine cover. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle)
  6. Fill the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .

J 38185: Hose Clamp Pliers

  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .
  2. Disengage tension on the heater outlet hose clamp (1) at the engine using J 38185: Hose Clamp Pliers.
  3. Remove the heater outlet hose (2) from the engine.
  4. Disengage tension on the heater outlet hose clamp (1) at the heater core using J 38185: Hose Clamp Pliers.
  5. Remove the heater outlet hose (2) from the heater core.
  6. Remove the heater outlet hose from the vehicle.
  1. Install heater inlet hose to the vehicle.
  2. Install the heater outlet hose (2) to the heater core.
  3. Engage tension on the heater outlet hose clamp (1) at the radiator using J 38185: Hose Clamp Pliers.
  4. Install the heater outlet hose (2) to the engine.
  5. Engage tension on the heater outlet hose clamp (1) at the engine using J 38185: Hose Clamp Pliers.
  6. Fill the cooling system. Refer to «Cooling System Draining and Filling (LS3, L99 Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LLT Static Fill)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716)»(/chevrolet/camaro/v-2009-2013/remont/cooling-system-mechanical/#engine-cooling-system) .

Scheme 16

Scheme 16: Passenger Compartment Air Filter Replacement
CalloutComponent Name
Preliminary Procedure: Remove air inlet grille panel. Refer to Air Inlet Grille Panel Replacement .
1Passenger Compartment Air Filter Service Lid Retainer Procedure: Release the retainer and open the service lid.
2Passenger Compartment Air Filter

Scheme 17

Scheme 17: Air Inlet Housing Replacement
CalloutComponent Name
Preliminary Procedures Remove the Heater and Air Conditioning Evaporator and Blower Module. Refer to Air Conditioning and Heater Module Assembly Removal and Installation . Disconnect the electrical connectors as necessary.
1Air Inlet Housing Fastener (Qty: 5) CAUTION: Refer to Fastener Caution . Tighten: 2.5 N.m (23 lb in)
2Air Inlet Housing
CAUTION
Refer to Fastener Caution .

Scheme 18

Scheme 18: Blower Motor Control Module Replacement
CalloutComponent Name
Preliminary Procedures Remove the I/P Compartment. Refer to Instrument Panel Compartment Replacement . Reposition any wiring or hoses to gain access to blower motor control.
1Blower Motor Control Module Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 2 N.m (17 lb in)
2Blower Motor Control Module Procedure: Disconnect the wiring connector.
CAUTION
Refer to Fastener Caution .
  1. Remove the instrument panel compartment assembly. Refer to «Instrument Panel Compartment Replacement»(/chevrolet/camaro/v-2009-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  2. Remove screws that attach lower portion of plastic instrument panel glove box opening.
  3. Pull lower portion of plastic instrument panel glove box opening away from metal mounting points enough to remove screws holding right side heater duct in place.
  4. Remove the right side floor heater duct. «Floor Front Air Outlet Duct Replacement (Right Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Floor Front Air Outlet Duct Replacement (Left Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove the blower motor cover. «Blower Motor Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. Remove the blower motor wire harness connector.
  7. Cut out the blower motor using a utility knife in the narrow groove of the lower case.
  8. Remove the blower motor.
  9. Remove the blower motor nuts.
  10. Remove the blower motor from the blower motor cup.

Scheme 19

Scheme 19: Removal Procedure - Previously Removed Blower Motor
  1. Remove the instrument panel compartment assembly. Refer to «Instrument Panel Compartment Replacement»(/chevrolet/camaro/v-2009-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  2. Remove screws that attach lower portion of plastic instrument panel glove box opening.
  3. Pull lower portion of plastic instrument panel glove box opening away from metal mounting points enough to remove screws holding right side heater duct in place.
  4. Remove the right side floor heater duct. «Floor Front Air Outlet Duct Replacement (Right Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Floor Front Air Outlet Duct Replacement (Left Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  5. Remove the blower motor cover. «Blower Motor Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. Remove the blower motor wire harness connector.
  7. Remove the 3 outer most screws from blower service ring.
  8. Remove the blower motor.
  9. Remove the blower motor nuts.
  10. Remove the blower motor from the blower motor cup.
  1. Clean / smooth the rough edges / burs of plastic from HVAC module case where original molded in place blower was cut out.
  2. Attach blower service ring using service screws. Tighten: Tighten the nuts to 2.4 N.m (21 lb in).
  3. Install blower motor with service ring assembly into position on the HVAC module, and attach service ring to HVAC module case with additional service screws
  4. Install the blower motor. Tighten: Tighten the screws to 1.5 N.m (13 lb in).
  5. Install the blower motor wire harness connector.
  6. Remove the right side floor heater duct. «Floor Front Air Outlet Duct Replacement (Right Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Floor Front Air Outlet Duct Replacement (Left Side)»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
  7. Install the instrument panel compartment assembly. Refer to «Instrument Panel Compartment Replacement»(/chevrolet/camaro/v-2009-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .

Scheme 20

Scheme 20: Blower Motor Cover Replacement
CalloutComponent Name
Preliminary Procedures Remove the I/P Compartment. Refer to Instrument Panel Compartment Replacement . Reposition right floor duct to access blower motor cover.
1Blower Motor Cover Screw (Qty: 2)
2Blower Motor Cover

Scheme 21

Scheme 21: Side Window Defogger Outlet Deflector Replacement
CalloutComponent Name
1Side Window Defroster Outlet Deflector Right or Left Procedure: Use a flat bladed plastic trim tool in order to release the deflector from the instrument panel assembly.

Scheme 22

Scheme 22: Instrument Panel Outer Air Outlet Replacement - Left Side
CalloutComponent Name
Preliminary Procedures Remove the left instrument panel outer trim cover. Refer to Instrument Panel Outer Trim Cover Replacement . Remove the left instrument panel outer air outlet duct assembly. Refer to Instrument Panel Outer Air Outlet Duct Replacement - Left Side . Remove the headlamp switch. Refer to Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement .
1Instrument Panel Outer Air Outlet Fasteners (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 2.5 N.m(22 lb in)
2Instrument Panel Outer Air Outlet Assembly
CAUTION
Refer to Fastener Caution .

Scheme 23

Scheme 23: Instrument Panel Center Air Outlet Replacement
CalloutComponent Name
Preliminary Procedure: Remove the instrument panel trim pad. Refer to Instrument Panel Trim Pad Replacement (with UV6) or Instrument Panel Trim Pad Replacement (without UV6) .
1Instrument Panel Center Air Outlet Fasteners (Qty: 5) CAUTION: Refer to Fastener Caution . Tighten: 2.5 N.m (22 lb in)
2Instrument Panel Center Air Outlet Assembly
CAUTION
Refer to Fastener Caution .

Scheme 24

Scheme 24: Instrument Panel Center Air Outlet Grille Replacement
CalloutComponent Name
1Instrument Panel Center Air Outlet Grille Assembly Procedure Use a flat bladed plastic trim tool and release the clip securing the left side of the grille assembly Pull the grill assembly to the left releasing the retainer tab on the right side of the grill. Disconnect the electrical connector. When replacing the instrument panel center air outlet grille assembly, transfer all necessary components.

Scheme 25

Scheme 25: Instrument Panel Outer Air Outlet Replacement - Right Side
CalloutComponent Name
Preliminary Procedures Remove the right instrument panel outer trim cover. Refer to Instrument Panel Outer Trim Cover Replacement . Remove the right instrument panel outer air outlet duct assembly. Refer to Instrument Panel Outer Air Outlet Duct Replacement - Right Side . Open the instrument panel compartment in order to access the lower screw.
1Instrument Panel Outer Air Outlet Fasteners (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 2.5 N.m(22 lb in)
2Instrument Panel Outer Air Outlet Assembly
CAUTION
Refer to Fastener Caution .

Scheme 26

Scheme 26: Floor Front Air Outlet Duct Replacement (Right Side)
CalloutComponent Name
Preliminary Procedures Remove the instrument panel compartment. Refer to Instrument Panel Compartment Replacement . Reposition any wiring or hoses to gain access to air duct.
1Floor Front Air Duct Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 2.0 N.m (18 lb in)
2Floor Front Air Duct (Right Side)
CAUTION
Refer to Fastener Caution .

Scheme 27

Scheme 27: Floor Front Air Outlet Duct Replacement (Left Side)
CalloutComponent Name
Preliminary Procedures Remove Instrument panel trim pad. Refer to Instrument Panel Trim Pad Replacement (with UV6) or Instrument Panel Trim Pad Replacement (without UV6) . Reposition any wiring or hoses to gain access to air duct.
1Floor Front Air Outlet Duct Screw (Qty: 2) CAUTION: Refer to Fastener Caution Tighten: 1.5 N.m (13 lb in)
2Floor Front Air Outlet Duct
CAUTION
Refer to Fastener Caution

Scheme 28

Scheme 28: Defroster Valve Replacement
CalloutComponent Name
Preliminary Procedures Remove the HVAC module. Refer to Air Conditioning and Heater Module Assembly Removal and Installation . Disconnect all the electrical connectors from components associated with the HVAC module. Remove any components associated with splitting the air distribution case. Remove Lower Heater case Refer to Heater Lower Case Replacement
1Defroster Valve

Scheme 29

Scheme 29: Instrument Panel Outer Air Outlet Duct Replacement - Left Side
CalloutComponent Name
Preliminary Procedures Remove the instrument panel (I/P) outer trim cover. Refer to Instrument Panel Outer Trim Cover Replacement . Reposition any wiring or hoses to gain access to air duct.
1Instrument Panel Outer Front Air Outlet Duct Screw (Qty: 1) CAUTION: Refer to Fastener Caution . Tighten: 1.5 N.m (13 lb in)
2Instrument Panel Outer Front Air Outlet Duct
CAUTION
Refer to Fastener Caution .

Scheme 30

Scheme 30: Instrument Panel Outer Air Outlet Duct Replacement - Right Side
CalloutComponent Name
Preliminary Procedures Remove the instrument panel (I/P) outer trim cover. Refer to Instrument Panel Outer Trim Cover Replacement . Reposition any wiring or hoses to gain access to air duct.
1Instrument Panel OuterFront Air Outlet Duct Screw (Qty: 1) CAUTION: Refer to Fastener Caution . Tighten: 1.5 N.m (13 lb in)
2Instrument Panel Outer Front Air Outlet Duct
CAUTION
Refer to Fastener Caution .

Scheme 31

Scheme 31: Windshield Defroster Duct Replacement
CalloutComponent Name
Preliminary Procedures Remove the I/P trim pad. Refer to Instrument Panel Trim Pad Replacement (with UV6) or Instrument Panel Trim Pad Replacement (without UV6) . Reposition any wiring or hoses to gain access to defroster duct.
1Windshield Defroster Air Duct Screw (Qty: 2) CAUTION: Refer to Fastener Caution Tighten: 1.5 N.m (13 lb in)
2Windshield Defroster Air Duct
CAUTION
Refer to Fastener Caution

Scheme 32

Scheme 32: Air Distributor Duct Replacement
CalloutComponent Name
Preliminary Procedures Remove the I/P trim pad. Refer to Instrument Panel Trim Pad Replacement (with UV6) or Instrument Panel Trim Pad Replacement (without UV6) . Reposition any wiring or hoses to gain access to air duct.
1Air Distributor Duct Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 1.5 N.m(13 2b in)
2Air Distributor Duct
CAUTION
Refer to Fastener Caution .

Heater Core Cover Replacement

CalloutComponent Name
Preliminary Procedure Remove the instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement . Remove HVAC Module. Refer to Air Conditioning and Heater Module Assembly Removal and Installation .
1Cover Assembly Screw - Heater (Qty: 12) Tighten: 1.5 N.m (13 lb in)
2Heater Cover Assembly
  1. Remove the HVAC module assembly. Refer to «Air Conditioning and Heater Module Assembly Removal and Installation»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__air-conditioning-and-heater-module-assembly) .
  2. Remove the heater core cover screws (2).
  3. Remove the heater core cover.
  4. Remove the heater core (4).
  1. Install the heater core (4).
  2. Install the heater core cover.
  3. Install the heater core cover screws (1) and tighten to 1.5 N.m (13 lb in).
  4. Install the HVAC module assembly. Refer to «Air Conditioning and Heater Module Assembly Removal and Installation»(/chevrolet/camaro/v-2009-2013/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__air-conditioning-and-heater-module-assembly) .

Engine Coolant

Engine coolant is the key element of the heating system. The engine thermostat controls the normal engine operating coolant temperature. Coolant pumped out of the engine enters the heater core through the inlet heater hose. The air flowing through the HVAC module absorbs the heat of the coolant flowing through the heater core. The coolant then exits the heater core through the heater outlet hose and returns back to the engine block.

A/C Cycle

Refrigerant is the key element in an air conditioning system. R-134a is presently the only EPA approved refrigerant for automotive use. R-134a is a very low temperature gas that can transfer the undesirable heat from the passenger compartment to the outside air.

A Delphi model CSP-17 compressor is used on this model year vehicle. The A/C compressor is belt driven and operates when the magnetic clutch is engaged. The compressor builds pressure in the A/C system. Compressing the refrigerant also adds heat to the refrigerant. The refrigerant is discharged from the compressor through the discharge hose, and forced to flow to the condenser and then through the balance of the A/C system. The A/C system is mechanically protected with the use of a high pressure relief valve. If the high pressure A/C switch were to fail or if the refrigerant system becomes restricted and refrigerant pressure continued to rise, the high pressure relief will pop open and release refrigerant from the system.

Compressed refrigerant enters the condenser in a high temperature, high pressure vapor state. As the refrigerant flows through the condenser, the heat of the refrigerant is transferred to the ambient air passing through the condenser. Cooling the refrigerant causes the refrigerant to condense and change from a vapor to a liquid state.

The condenser is located in front of the radiator for maximum heat transfer. The condenser is made of aluminum tubing and aluminum cooling fins, which allows rapid heat transfer for the refrigerant. The semi-cooled liquid refrigerant exits the condenser and flows through the liquid line, to the TXV.

The TXV is located at the evaporator inlet. The TXV is the dividing point for the high and the low pressure sides of the A/C system. As the refrigerant passes through the TXV, the refrigerant is lowered. Due to the pressure differential on the liquid refrigerant, the refrigerant will begin to boil at the TXV. The TXV also meters the amount of liquid refrigerant that can flow into the evaporator.

Refrigerant exiting the TXV flows into the evaporator core in a low pressure, liquid state. Ambient air is drawn through the HVAC module and passes through the evaporator core. Warm and moist air will cause the liquid refrigerant to boil inside the evaporator core.

The boiling refrigerant absorbs heat from the ambient air and draws moisture onto the evaporator. The refrigerant exits the evaporator through the suction line and back to the compressor, in a vapor state. This completes the A/C cycle of heat removal. At the compressor, the refrigerant is compressed again and the cycle of heat removal is repeated.

The conditioned air is distributed through the HVAC module for passenger comfort. The moisture removed from the passenger compartment will also change form, or condense, and is discharged from the HVAC module as water.

Illustration Tool Number / Description J 38185 Hose Clamp Pliers J 41447 R-134a A/C Tracer Dye - Box of 24 J 41459 A/C Oil Injector J 42220 Universal 12V Leak Detection Lamp J 43600 ACR 2000 Air Conditioning Service Center J 43872 Fluorescent Dye Cleaner J 43872 Soapy Water Solution J 45037 A/C Oil Injector J 45268 A/C Flushing Adapter Kit J 46053 Electronic Leak Detector J 46246 Charge Port Valve Core Remover/Installer J 46297 A/C Dye Injector Kit J 46297-12 Replacement Dye Cartridges 7000086I Scan Tool Used for diagnosis of vehicle electrical system

Scheme 33

Scheme 33: Special Tools

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See also:
Symptoms - HVAC Systems - Manual
Moving Parts and Hot Surfaces Warning
Diagnostic Starting Point - Vehicle
Cooling System Description and Operation
Engine Fails To Reach Normal Operating Temperature
Drive Belt Falls Off and Excessive Wear Diagnosis
Drive Belt Falls Off and Excessive Wear Diagnosis
Drive Belt Tensioner Diagnosis
Drive Belt Tensioner Diagnosis
Drive Belt Replacement - Accessory
Vibration Analysis - Engine
Instrument Panel Tie Bar Replacement
Loss of Coolant
Oil Leak Diagnosis
Oil Pressure Diagnosis and Testing
Fluid Leak Diagnosis
Power Steering Fluid Leaks
Fastener Caution
Lifting and Jacking the Vehicle
Drive Belt Replacement
Air Cleaner Assembly Replacement
Front Bumper Fascia Upper Support Replacement
Air Inlet Grille Panel Replacement
Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement
Refrigerant Recovery and Recharging
Air Conditioning (A/C) Diagnostics - Pressure Zone A
Air Conditioning (A/C) System Performance Test (V6)
Refrigerant System Specifications
Heating Performance Diagnostic
Air Conditioning Compressor Oil Diagnosis
Air Conditioning Clutch Drive Plate Adjustment
Air Conditioning and Heater Module Assembly Removal and Installation