Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
DEFINITION: The A/C compressor does not engage when requested by the operator. | ||||
1 |
Are any compressor disabling diagnostic trouble codes set by the dash integration module (DIM) or the powertrain control module (PCM)? | -- | Go to the appropriate Diagnostic Trouble Code (DTC) table | |
2 | Using the scan tool view DIM data. Is the A/C Clutch (Actual) ON? | -- | ||
3 | Using the scan tool view A/C pressure status. Is the A/C pressure status NORMAL? | NORMAL | ||
4 | Using the scan tool view the Battery voltage. Is the battery voltage greater then the specified value? | 10.5 V | Go to Charging System Check | |
5 | Using the scan tool view the A/C temperature status. Is the A/C temperature status OK? | -- | Go to Cooling Insufficient - Air Conditioning (A/C) Inoperative | |
6 | Using the scan tool view the system pressure. Is the system pressure low? | -- | Go to Cooling Insufficient - Air Conditioning (A/C) Inoperative | |
7 | Inspect the A/C CLU fuse for an open. Is the A/C CLU fuse open? | -- | ||
8 | Replace the A/C CLU fuse. Is the A/C CLU fuse replaced? | -- | -- | |
9 |
Is the voltage measured greater then the specified value? | 10.5 V | ||
10 | Measure the voltage between terminal A of the compress clutch and ground. Is the voltage measured greater then the specified value? | 10.5 V | ||
11 |
Is the voltage measured greater then the specified value? | 10.5 V | ||
12 | Measure voltage to the A/C CLU relay terminal 86. Is the voltage measured greater then the specified value? | 10.5 V | ||
13 | Measure voltage at terminal 27 CKT 459 (DK GRN/WHT) at the PCM. Is the voltage measured greater then the specified value? | 10.5 V | ||
14 | Inspect CKT 459 (DK GRN/WHT) for an open or short to battery voltage. Is the repair complete? | -- | -- | |
15 | Replace the compressor. Refer to Air Conditioning Compressor Replacement . Is the repair complete? | -- | -- | |
16 | Inspect CKT 1550 (BLK) for an open condition. Is the repair complete? | -- | -- | |
17 | Replace the A/C CLU relay. Has the A/C CLU relay been replaced? | -- | -- | |
18 | Replace the PCM. Refer to PCM replacement in Engine Controls. Is the repair complete? | -- | -- | |
19 |
Is the repair complete? | -- | -- | |
20 | Confirm proper operation of the A/C compressor. Is the A/C compressor operating correctly? | -- | System OK | -- |