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 - P0481-HIGH SPEED FAN CONTROL RELAY CIRCUIT
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition on. With the DRBIII®, actuate the High Speed Radiator Fan Relay. Is the High Speed Radiator Fan Relay operating? Yes --> Refer to the INTERMITTENT CONDITION . Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 2 |
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| 2 | Turn the ignition off. Remove the High Speed Radiator Fan Relay from the PDC. Turn the ignition on. Measure the voltage of the (A16) Fused Ignition Switch Output circuit in the PDC. Is the voltage above 11.0 volts? Yes --> Go To 3 No --> Repair the (A16) Fused Ignition Switch Output circuit. Check and replace any open fuses. Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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| 3 | Turn the ignition off. Remove the High Speed Radiator Fan Relay from the PDC. Measure the resistance of the High Speed Radiator Fan Relay between the Fused Ignition Switch Output terminal and the High Speed Rad Fan Relay Control terminal. Is the resistance between 60 to 85 ohms? Yes --> Go To 4 No --> Replace the High Speed Radiator Fan Relay. Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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| 4 | Turn the ignition off. Remove the High Speed Radiator Fan 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 (C27) High Speed Rad Fan 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 (C27) High Speed Rad Fan Relay Control circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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| 5 | Turn the ignition off. Remove the High Speed Radiator Fan Relay from the PDC. Disconnect the PCM harness connector. Measure the resistance between ground and the (C27) High Speed Rad Fan Relay Control circuit in the PDC. Is the resistance below 5.0 ohms? Yes --> Repair the short to ground in the (C27) High Speed Rad Fan Relay Control circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . 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.Repair
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary. Replace and program the Powertrain Control Module in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
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