HVAC Compressor Clutch Does Not Engage Gasoline
| • | Refer to Air Conditioning (A/C) Compressor Control Circuit Diagnosis in Engine Controls - 4.3L - L35 |
| • | Refer to Air Conditioning (A/C) Compressor Control Circuit Diagnosis in Engine Controls - 5.0L- 5.7L Air Conditioning (A/C) Request Circuit Diagnosis |
| • | Refer to Air Conditioning (A/C) Compressor Control Circuit Diagnosis in Engine Controls - 7.4L- L29 |
HVAC Compressor Clutch Does Not Engage Diesel MFI
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Before using this table, confirm that the air conditioning (A/C) system has an adequate state of charge. Does the A/C system have an adequate state of charge? | -- | Go to Step 2 | |
2 | Inspect the condition of the ENG-BAT fuse. Is the fuse open? | -- | Go to Step 3 | Go to Step 4 |
3 | Locate and repair the source of the overload in CKT 540 (ORN) and replace the fuse. Is the repair complete? | -- | System OK | -- |
4 | Inspect the condition of G 200. Is it clean and tight? | -- | Go to Step 6 | Go to Step 5 |
5 | Repair G 200 as necessary. Is the repair complete? | -- | System OK | -- |
6 |
Did the compressor engage? | -- | System OK | Go to Step 7 |
7 |
Did the test light illuminate? | -- | Go to Step 8 | Go to Step 9 |
8 | Connect a test light from the A/C compressor clutch connector cavity B to B +. Did the test light illuminate? | -- | Go to Step 10 | Go to Step 11 |
9 |
Did the test light illuminate? | -- | Go to Step 12 | Go to Step 13 |
10 | Replace the A/C compressor clutch coil. Refer to Compressor Clutch Coil and/or Pulley Rim . Is the repair complete? | -- | System OK | -- |
11 | Repair the open in CKT 250 (BLK) between the A/C compressor clutch connector cavity B and G 200. Is the repair complete? | -- | System OK | -- |
12 |
Did the compressor engage? | -- | Go to Step 14 | Go to Step 15 |
13 | Repair the open in CKT 540 (ORN) between the ENG-BAT fuse cavity F1 and the A/C compressor relay connector cavity 30. Is the repair complete? | -- | System OK | -- |
14 |
Did the test light illuminate? | -- | Go to Step 16 | Go to Step 17 |
15 |
Did the test light illuminate? | -- | Go to Step 10 | Go to Step 18 |
16 | Connect a test light from the A/C compressor relay connector, cavity 86 to B +. Did the test light illuminate? | -- | Go to Step 19 | Go to Step 20 |
17 |
Did the test light illuminate? | -- | Go to Step 21 | Go to Step 22 |
18 | Repair the open in CKT 59 (DK GRN) between the A/C compressor relay connector, cavity 87 and the A/C compressor clutch connector, cavity A. Is the repair complete? | -- | System OK | -- |
19 | Replace the A/C compressor relay. Refer to Compressor Relay Replacement . Is the repair complete? | -- | System OK | -- |
20 | Repair the open in CKT 250 (BLK) between the A/C compressor relay connector, cavity 86 and G 200. Is the repair complete? | -- | System OK | -- |
21 |
Did the test light illuminate? | -- | Go to Step 23 | Go to Step 24 |
22 |
Did the test light illuminate? | -- | Go to Step 25 | Go to Step 26 |
23 | Replace the A/C compressor high pressure cutoff switch. Is the repair complete? | -- | System OK | -- |
24 | Repair the open in CKT 762 (DK GRN/WHT) between the A/C compressor high pressure cutoff switch connector, cavity B and the A/C compressor relay connector, cavity 85. Is the repair complete? | -- | System OK | -- |
25 | Use a J 39200 DMM in order to measure the resistance from the A/C compressor refrigerant pressure switch connector, cavity A to the A/C compressor high pressure cutoff switch connector, cavity A. Is the resistance greater than the specified value? | 1.0ohms | Go to Step 28 | Go to Step 27 |
26 | Repair the open in CKT 922 (GRY) between the A/C compressor refrigerant pressure switch connector, cavity B through the A/C ON/OFF switch and the ignition switch circuit. Is the repair complete? | -- | System OK | -- |
27 | Replace the A/C compressor refrigerant pressure switch. Is the repair complete? | -- | System OK | -- |
28 | Repair the open in CKT 203 (LT BLU) between the A/C compressor high pressure cutoff switch connector, cavity A and the A/C compressor refrigerant pressure switch connector, cavity A. Is the repair complete? | -- | System OK | -- |
HVAC Compressor Clutch Does Not Engage Diesel EFI
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Before using this table, confirm that the air conditioning (A/C) system has an adequate state of charge. Does the A/C system have an adequate state of charge? | -- | Go to Step 2 | |
2 | Inspect the condition of the HEATER fuse. Is the fuse open? | -- | Go to Step 3 | Go to Step 4 |
3 | Locate and repair the source of the overload in CKT 922 and replace the fuse. Is the repair complete? | -- | System OK | -- |
4 | Inspect the condition of the ENG-BAT fuse. Is the fuse open? | -- | Go to Step 5 | Go to Step 6 |
5 | Locate and repair the source of the overload in CKT 540 (ORN) and replace the fuse. Is the repair complete? | -- | System OK | -- |
6 | Inspect the condition of the GAUGES fuse. Is the fuse open? | -- | Go to Step 7 | Go to Step 8 |
7 | Locate and repair the source of the overload in CKT 39 (PNK) and replace the fuse. Is the repair complete? | -- | System OK | -- |
8 | Inspect the condition of the grounds G 200 and G 104 for the P32, and the grounds G 200 and G 102 for the P42. Are the grounds clean and tight? | -- | Go to Step 10 | Go to Step 9 |
9 | Repair the grounds as necessary. Is the repair complete? | -- | System OK | -- |
10 |
Did the test light illuminate? | -- | Go to Step 11 | Go to Step 12 |
11 | Connect a test light from the A/C compressor clutch connector, cavity B to B+. Did the test light illuminate? | -- | Go to Step 13 | Go to Step 14 |
12 |
Did the test light illuminate? | -- | Go to Step 15 | Go to Step 16 |
13 | Replace the A/C compressor clutch coil. Refer to Compressor Clutch Coil and/or Pulley Rim . Is the repair complete? | -- | System OK | -- |
14 | Repair the open in CKT 250 (BLK) between the A/C compressor clutch connector, cavity B, and G 200. Is the repair complete? | -- | System OK | -- |
15 |
Did the compressor engage? | -- | Go to Step 17 | Go to Step 20 |
16 | Repair the open in CKT 540 (ORN) between the ENG-BAT fuse cavity F1 and the A/C compressor relay connector, cavity 30. Is the repair complete? | -- | System OK | -- |
17 |
Did the test light illuminate? | -- | Go to Step 19 | Go to Step 18 |
18 | Repair the open in CKT 39 (PNK) between the GAUGES fuse, cavity F5 and the A/C compressor relay connector, cavity 85. Is the repair complete? | -- | System OK | -- |
19 |
Did the test light illuminate? | -- | Go to Step 32 | Go to Step 22 |
20 |
Did the test light illuminate? | -- | Go to Step 11 | Go to Step 21 |
21 | Repair the open in CKT 59 (DK GRN) between the A/C compressor relay connector, cavity B87, to the A/C compressor clutch connector, cavity A. Is the repair complete? | -- | System OK | -- |
22 |
Is the resistance greater than the specified value? | 1.0ohms | Go to Step 23 | Go to Step 24 |
23 | Repair the open in CKT 459 (DK GRN/WHT) between the PCM connector C3, cavity D5, and the A/C compressor relay connector, cavity 86. Is the repair complete? | -- | System OK | -- |
24 |
Did the test light illuminate? | -- | Go to Step 35 | Go to Step 25 |
25 |
Did the test light illuminate? | -- | Go to Step 26 | Go to Step 28 |
26 | Use a J 39200 DMM in order to measure the resistance between the A/C compressor high pressure cutoff switch connector, cavity B, and the PCM connector C1, cavity C2. Is the resistance greater than the specified value? | 1.0ohms | Go to Step 27 | Go to Step 33 |
27 | Repair the open in CKT 762 (DK GRN/WHT) between the A/C compressor high pressure cutoff switch connector, cavity B, and the PCM connector C1, cavity C2. Is the repair complete? | -- | System OK | -- |
28 |
Did the test light illuminate? | -- | Go to Step 29 | Go to Step 31 |
29 | Use a J 39200 DMM in order to measure the resistance from the A/C compressor refrigerant pressure switch connector, cavity A, to the A/C compressor high pressure cutoff switch connector, cavity A. Is the resistance greater than the specified value? | 1.0ohms | Go to Step 30 | Go to Step 34 |
30 | Repair the open in CKT 203 (LT BLU) between the A/C compressor refrigerant pressure switch connector, cavity A, and the A/C compressor high pressure cutoff switch connector, cavity A. Is the repair complete? | -- | System OK | -- |
31 | Repair the open in CKT 922 (GRY) between the A/C compressor refrigerant pressure switch and the heater and A/C control. Is the repair complete? | -- | System OK | -- |
32 | Replace the A/C compressor relay. Refer to Compressor Relay Replacement . Is the repair complete? | -- | System OK | -- |
33 | Replace the A/C compressor high pressure cutoff switch. Refer to Compressor Control Switches . Is the repair complete? | -- | System OK | -- |
34 | Replace the A/C compressor refrigerant pressure switch. Refer to Compressor Control Switches . Is the repair complete? | -- | System OK | -- |
35 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Is the repair complete? | -- | System OK | -- |
