B2300 SE Regular Cab 2WD L4-2.3L VIN A (1997)
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Fuel Pump Relay: Description and Operation
FUEL PUMP RELAY
Fuel pump relay is controlled by PCM. PCM turns relay on in following conditions:
1. For one second after ignition ON.
2. During receive Profile Ignition Pickup (PIP) signal.
NOTE: Fuel pump monitor:
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Fuel pump monitor is spliced into power-to-pump circuit.
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PCM uses this circuit for diagnostic purposes.