P0251

Tests 1 - 2:

Tests 3 - 8:

Tests 9 - 13:

Test 14:

SYMPTOM
P0251 - FUEL INJECTION PUMP MECHANICAL FAILURE FUEL VALVE FEEDBACK CIRCUIT

WHEN MONITORED
Ignition ON.

SET CONDITION
Fuel command > 20 ml/stroke, Fuel Pump Battery voltage, when Fuel Delivery Valve, Solenoid is energized > 9 volts

POSSIBLE CAUSES
- Fuel injection pump module wiring harness observable defect
- Fuel injection pump relay control circuit open
- Fuel injection pump relay ground circuit open
- Fuel injection pump relay output circuit open
- Fuel injector pump ground circuit open
- Fused B(+) circuit open
- Fuel injection pump
- Fuel injection pump relay
- Battery