Refrigerant Temperature Sensor: Service and Repair
Air Conditioning Refrigerant Temperature Sensor Replacement
Removal Procedure
1. Remove the instrument panel compartment door assembly. Refer to Instrument Panel Compartment Door Replacement (Except Cadillac) Instrument Panel Compartment Door ReplacementInstrument Panel Compartment Door Replacement (Cadillac) Instrument Panel Compartment Door Replacement.
2. Remove the instrument panel inflatable restraint module. Refer to Instrument Panel Inflatable Restraint Module Replacement Instrument Panel Inflatable Restraint Module Replacement.
3. Disconnect the air conditioning refrigerant temperature sensor connector (1).
4. Test the resistance reading of the air conditioning refrigerant temperature sensor. Refer to Sensor Resistance Table Electrical Specifications.
5. Remove the right side instrument panel insulator. Refer to Instrument Panel Insulator Replacement (Cadillac) Instrument Panel Insulator ReplacementInstrument Panel Insulator Replacement (Except Cadillac) Instrument Panel Insulator Replacement
6. Remove the rubber plug from the bottom of the air conditioning and heater module assembly if equipped, and proceed to step 13. If air conditioning and heater module assembly is not equipped with rubber plug proceed to the next step.
7. Open the template by clicking on the magnifying glass.
8. Above the template image, click on the printer icon next to the 1:1 in order to print in the correct scale.
Note: No other printing method is acceptable as scale changes print size.
9. Make a copy of the template using a copy machine, and re-size the template vertical and horizontal axis to a scale 50 mm.
10. Cut the template out along the printed ribs.
11. Secure the template to the bottom of the air conditioning and heater module assembly (1) with tape. The template should fit snugly between the molded ribs.
Caution: Extreme care must be taken when drilling into the air conditioning and heater case module. Misalignment of the hole can cause damage to the air conditioning evaporator or temperature door requiring replacement of these components.
12. Slowly drill a hole through the air conditioning and heater module assembly using a 1-1/4 inch (32 mm) hole saw following the template outline.
13. Inspect the air conditioning refrigerant temperature sensor through the newly drilled hole. The air conditioning refrigerant temperature sensor should be secure to the center of the evaporator core.
14. If the air conditioning refrigerant temperature sensor (1) is not secured to the evaporator core (2), use a pair of long needle nose pliers to grip the air conditioning refrigerant temperature sensor at the plastic base, and insert air conditioning refrigerant temperature sensor into the evaporator core.
15. Perform the air conditioning refrigerant temperature sensor calibration check using the scan tool.
16. If it is determine that the air conditioning refrigerant temperature sensor is defective and needs to be replaced, use a pair of long needle nose pliers to grip the air conditioning refrigerant temperature sensor at the plastic base. Pull the air conditioning refrigerant temperature sensor out away from the evaporator core and out of the newly drilled hole.
17. Secure 1 wire, 30 inches (762 mm) in length to the air conditioning refrigerant temperature sensor side of the sensor.
18. Secure 1 wire, 30 inches (762 mm) in length to the air conditioning refrigerant temperature sensor connector side of the sensor.
19. Remove the air conditioning refrigerant temperature sensor harness grommet (1) from the top of the air conditioning and heater module assembly (2).
20. Pull the air conditioning refrigerant temperature sensor (1) up and out of the air conditioning and heater module assembly (2), leaving part of the secured wire exiting the newly drilled hole.
Installation Procedure
1. Secure the new air conditioning refrigerant temperature sensor to the wire that was secured to the air conditioning refrigerant temperature sensor side.
2. Pull the wire exiting the newly drilled hole, routing the air conditioning refrigerant temperature sensor (1) back into the air conditioning and heater module assembly (2).
3. Install the air conditioning refrigerant temperature sensor harness grommet (1) back into the top of the air conditioning and heater module assembly (2).
4. Connect the air conditioning refrigerant temperature sensor connector (1).
5. Use a pair of long needle nose pliers to grip the air conditioning refrigerant temperature sensor at the plastic base (1), and insert air conditioning refrigerant temperature sensor into the center of the evaporator core (2).
6. Perform the air conditioning refrigerant temperature sensor calibration check using the scan tool.
7. Install 1 1/4 (32 mm) inch plug (P/N 94535734) into the newly drilled hole.
8. Apply silicon sealer (GM#88861417) around the perimeter of the plug.
9. Install the right side instrument panel insulator. Refer to Instrument Panel Insulator Replacement (Cadillac) Instrument Panel Insulator ReplacementInstrument Panel Insulator Replacement (Except Cadillac) Instrument Panel Insulator Replacement
10. Install the instrument panel inflatable restraint module. Refer to Instrument Panel Inflatable Restraint Module Replacement Instrument Panel Inflatable Restraint Module Replacement.
11. Install the instrument panel compartment door assembly. Refer to Instrument Panel Compartment Door Replacement (Except Cadillac) Instrument Panel Compartment Door ReplacementInstrument Panel Compartment Door Replacement (Cadillac) Instrument Panel Compartment Door Replacement.