Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS PROCEDURE - P0645-A/C CLUTCH RELAY CIRCUIT
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. With the DRBIII®, actuate the A/C Clutch Relay. Is the A/C Clutch Relay operating? Yes --> Refer to the INTERMITTENT CONDITION . Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . No --> Go To 2 |
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| 2 | Turn the ignition off. Remove the A/C Clutch Relay from the PDC. Ignition on, engine not running. Measure the voltage on the (A14) Fused Ignition Switch Output circuit in the PDC. Is the voltage above 11.0 volts? Yes --> Go To 3 No --> Repair the open or short to ground in the (A17) Fused Ignition Switch Output circuit. Check and replace any open fuses. Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . |
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| 3 | Turn the ignition off. Remove the A/C Clutch Relay from the PDC. Measure the resistance of the A/C Clutch Relay between the Fused Ignition Switch Output terminal and the A/C Clutch Relay Control terminal. Is the resistance between 60 to 95 ohms? Yes --> Go To 4 No --> Replace the A/C Clutch Relay. Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . |
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| 4 | Turn the ignition off. Remove the A/C Clutch Relay from the PDC. Disconnect the PCM harness connector.
CAUTION:
DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS. Measure the resistance of the (C28) A/C Clutch Relay Control circuit from the PDC to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes --> Go To 5 No --> Repair the open in the (C28) A/C Clutch Relay Control circuit. Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . |
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| 5 | Turn the ignition off. Remove the A/C Clutch Relay from the PDC. Measure the resistance between ground and the (C28) A/C Clutch Control circuit in the PDC. Is the resistance below 5.0 ohms? Yes --> Repair the short to ground in the (C28) A/C Clutch Relay Control circuit. Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . No --> Go To 6 |
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| 6 |
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. If there are no possible causes remaining, view repair.RepairReplace and program the Powertrain Control Module in accordance with the Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC . |
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