Pinpoint Test Kc: Fuel Pump Control Module
WARNING:
WARNING: Before working on or disconnecting any of the fuel tubes or fuel system components, relieve the fuel system pressure to prevent accidental spraying of fuel. Fuel in the fuel system remains under high pressure, even when the engine is not running. Failure to follow this instruction may result in serious personal injury.
WARNING:
WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING:
WARNING: Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING:
WARNING: When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.
WARNING:
WARNING: Clean all fuel residue from the engine compartment. If not removed, fuel residue may ignite when the engine is returned to operation. Failure to follow this instruction may result in serious personal injury.
Refer to appropriate service information for schematic and connector information.
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P0230:00 | Fuel Pump Primary Circuit: No Sub Type Information | Sets when the PCM detects a concern from the fuel pump or fuel pump relay power (FPRPWR) circuits. |
| PCM P025A:00 | Fuel Pump Module "A" Control Circuit/Open: No Sub Type Information | Sets when the PCM detects an open, short to voltage or short to ground from ground the fuel pump command. When the PCM commands the fuel pump ON, the PCM is able to detect a short to voltage on the fuel pump command circuit. When the PCM commands the fuel pump OFF, the PCM is able to detect an open circuit or a short to ground from the fuel pump command circuit. |
| PCM P025B:00 | Fuel Pump Module "A" Control Circuit Range/Performance: No Sub Type Information | Sets when the PCM detects the fuel pump control module is still reporting an invalid duty cycle or frequency from the PCM after a calibrated amount of time. The fuel pump control module monitors the duty cycle and frequency of the signal it receives from the PCM. The fuel pump control module determines if the signal from the PCM on the fuel pump command circuit is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module sends a 20% duty cycle signal on the fuel pump monitor circuit to report the concern to the PCM. Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems. |
| PCM P0627:00 | Fuel Pump "A" Control Circuit/Open: No Sub Type Information | Sets when the PCM detects the fuel pump control module is reporting a concern with the fuel pump module or secondary circuits after a calibrated amount of time. The fuel pump control module monitors the fuel pump module and secondary circuits for a concern. If the fuel pump control module detects a concern with the fuel pump module or secondary circuits, the fuel pump control module sends an 80% duty cycle signal on the fuel pump monitor circuit to report the concern to the PCM. |
| PCM P064A:00 | Fuel Pump Control Module "A": No Sub Type Information | Sets when the PCM detects the fuel pump control module has an internal concern. Clear the PCM Diagnostic Trouble Codes (DTCs). Repeat the self-test. If the DTC is retrieved again, install a new fuel pump control module. Refer to FUEL PUMP DRIVER MODULE (FPDM) . |
| PCM P166A:00 | Restraints Deployment Communication Circuit: No Sub Type Information | Sets when the PCM detects an open or short from the IES circuit. |
| PCM U0109:00 | Lost Communication With Fuel Pump Control Module "A": No Sub Type Information | Sets when the PCM does not detect a duty cycled signal from the fuel pump monitor circuit after a calibrated amount of time. The PCM monitors the fuel pump monitor circuit for the presence of a duty cycled signal. If the fuel pump monitor circuit is fixed at a low or high voltage, the PCM begins to increment a counter. |
Possible Sources
- Fuel pump circuitry concern
- IES signal circuitry concern
- Fuel pump control module relay
- Fuel pump control module (9D370)
- Fuel pump (9H307)
- PCM (12A650)