HVAC Compressor Clutch Does Not Engage GAS
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
|
Important:: Before performing the following diagnostic check and repair any DTC's found stored within the VCM. Refer to Powertrain On Board Diagnostic (OBD) System Check (5.7L) or Powertrain On Board Diagnostic (OBD) System Check (7.4L) in Engine Controls. | ||||
1 | Perform the Cooling Insufficient - A/C Inoperative Diagnosis. Refer to Cooling Insufficient - Air Conditioning (A/C) Inoperative . Is the problem corrected? | -- | Go to Step 2 | |
2 |
Does the clutch click? | -- | Go to Step 14 | Go to Step 3 |
3 |
Does the clutch click? | -- | Go to Step 4 | Go to Step 7 |
4 |
Is battery voltage present? | -- | Go to Step 5 | Go to Step 6 |
5 | Replace the A/C Compressor Clutch Relay. Is the repair complete? | -- | -- | |
6 | Locate and repair the open in the circuit(s) between the Underhood Fuse Block pin G8 and cavity 1 of VCM C3. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
7 |
Is continuity present? | -- | Go to Step 9 | Go to Step 8 |
8 | Locate and repair the open in CKT 150 (BLK) between the compressor clutch and ground G105. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
9 |
Is battery voltage present? | -- | Go to Step 11 | Go to Step 10 |
10 | Locate and repair the open in the circuit(s) between the Underhood Fuse Block pin L12 and cavity B of the Compressor Clutch connector. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
11 |
Is continuity present in one direction only? | -- | Go to Step 13 | Go to Step 12 |
12 | Replace the diode located within the A/C Compressor Clutch Harness. Refer to Splicing Inline Harness Diodes in Wiring Systems. Is the repair complete? | -- | -- | |
13 | Replace the A/C Compressor Clutch. Refer to Compressor Clutch Plate/Hub Assembly Replacement . Is the repair complete? | -- | -- | |
14 |
Is battery voltage present? | -- | Go to Step 15 | Go to Step 18 |
15 |
Is continuity present? | -- | Go to Step 17 | Go to Step 16 |
16 | Locate and repair the open in the circuit(s) between cavity 25 of VCM C3 and grounds G103 and G104. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
17 | Replace the A/C Cycling Evaporator/Clutch Switch. Refer to Air Conditioning (A/C) High Pressure Cut-Out Switch Replacement . Is the repair complete? | -- | -- | |
18 |
Is battery voltage present? | -- | Go to Step 19 | Go to Step 20 |
19 | Replace the A/C High Pressure Switch. Refer to Air Conditioning (A/C) High Pressure Cut-Out Switch Replacement . Is the repair complete? | -- | -- | |
20 |
Is battery voltage present? | -- | Go to Step 21 | Go to Step 22 |
21 | Replace the HVAC Control Module. Refer to Control Assembly Replacement Is the repair complete? | -- | -- | |
22 | Locate and repair the open in the circuit(s) between cavity 25 of VCM C3 and pin N5 of the IP Fuse Block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
HVAC Compressor Clutch Does Not Engage DIESEL
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
|
Important:: Before performing the following diagnostic check and repair any DTC's found stored within the PCM. Refer to Powertrain On Board Diagnostic (OBD) System Check (6.5L) in Engine Controls. | ||||
1 | Perform the Cooling Insufficient - A/C Inoperative Diagnosis. Refer to Cooling Insufficient - Air Conditioning (A/C) Inoperative . Is the problem corrected? | -- | Go to Step 2 | |
2 |
Does the clutch click? | -- | Go to Step 14 | Go to Step 3 |
3 |
Does the clutch click? | -- | Go to Step 4 | Go to Step 7 |
4 |
Is battery voltage present? | -- | Go to Step 5 | Go to Step 6 |
5 | Replace the A/C Compressor Clutch Relay. Is the repair complete? | -- | -- | |
6 | Locate and repair the open in the circuit(s) between the Underhood Fuse Block pin G8 and cavity D5 of PCM C3. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
7 |
Is continuity present? | -- | Go to Step 9 | Go to Step 8 |
8 | Locate and repair the open in CKT 150 (BLK) between the compressor clutch and ground G105. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
9 |
Is battery voltage present? | -- | Go to Step 11 | Go to Step 10 |
10 | Locate and repair the open in the circuit(s) between the Underhood Fuse Block pin L12 and cavity B of the Compressor Clutch connector. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
11 |
Is continuity present in one direction only? | -- | Go to Step 13 | Go to Step 12 |
12 | Replace the diode located within the A/C Compressor Clutch Harness. Refer to Splicing Inline Harness Diodes in Wiring Systems. Is the repair complete? | -- | -- | |
13 | Replace the A/C Compressor Clutch. Refer to Compressor Clutch Plate/Hub Assembly Replacement . Is the repair complete? | -- | -- | |
14 |
Is battery voltage present? | -- | Go to Step 15 | Go to Step 16 |
15 | Replace the A/C Compressor Cycling Evaporator Switch. Refer to Air Conditioning (A/C) High Pressure Cut-Out Switch Replacement . Is the repair complete? | -- | -- | |
16 |
Is battery voltage present? | -- | Go to Step 17 | Go to Step 18 |
17 | Replace the A/C High Pressure Switch. Refer to Air Conditioning (A/C) High Pressure Cut-Out Switch Replacement . Is the repair complete? | -- | -- | |
18 |
Is battery voltage present? | -- | Go to Step 19 | Go to Step 20 |
19 | Replace the HVAC Control Module. Refer to Control Assembly Replacement . Is the repair complete? | -- | ||
20 | Locate and repair the open in the circuit(s) between cavity C2 of PCM C1 and pin N5 of the IP Fuse Block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
