Villager V6-181 3.0L SOHC VIN 1 EFI (1997)
Fuel Pump Relay: Description and Operation
Fuel Pump Relay
PURPOSE
The Fuel Pump (FP) relay supplies voltage to the fuel pump when activated by the Powertrain Control Module (PCM).
LOCATION
In the LH engine compartment relay block.
OPERATION
The PCM activates the FP relay for five seconds after turning the ignition key ON, and when the engine is cranking or running. The PCM deactivates
the FP relay 1.5 seconds after the engine stops. The voltage supplied from the FP relay allows the fuel pump to operate. When the PCM receives a 120
degree signal from the camshaft Position (CMP) sensor, it knows that the engine is rotating, and causes the FP relay to activate. When activated, the
FP relay supplies the pump with voltage, which allows it to operate continuously as long as the engine is running, If the PCM does not receive a 120
degree signal when the ignition switch is ON, the FP relay is deactivated to prevent battery discharging, thereby improving safety.
