Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: HVAC Schematics | |||
1 | Did you review the Air Delivery Description and Operation and the Air Temperature Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the compressor clutch disengage? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Disconnect the compressor clutch relay. Does the compressor clutch disengage? | Go to Step 5 | Go to Step 4 |
4 | Test for a short to voltage in the compressor clutch supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
5 | Exchange the compressor clutch relay with a known good relay (the horn relay or the shiftlock relay). Does the compressor clutch operate normally? | Go to Step 10 | Go to Step 6 |
6 |
Does the compressor clutch engage? | Go to Step 7 | Go to Step 8 |
7 | Test for a short to ground in the compressor clutch relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
8 | Test for a short to ground in the A/C request signal circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
9 | Replace the A/C compressor clutch. Refer to Air Conditioning Clutch Coil Replacement . Did you complete the replacement? | Go to Step 12 | -- |
10 | Replace the A/C compressor clutch relay. Refer to Compressor Relay Replacement . Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the A/C compressor control module. Refer to Air Conditioning (A/C) Compressor Control Module Replacement . Did you complete the replacement? | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
