pontiac Workshop Repair Guides

Pontiac Workshop Service and Repair Manuals

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Wiring Diagrams - Revised Relay Position Illustration|Page 3632 > < Wiring Diagrams - Revised Relay Position Illustration|Page 3630

Grand AM L4-138 2.3L DOHC VIN D MFI (1994)

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Fuel Pump Relay: Description and Operation

Fuel Control Wiring Schematic

OPERATION

When the ignition key is first turned to the "ON" position, the PCM will energize the fuel pump relay for two seconds. This increases fuel pressure for
cranking.  If the engine is not running within two seconds, the PCM will shut off the relay and wait until the engine starts. As soon as the engine is
cranked, the PCM will energize the relay and power the fuel pump.

NOTE The fuel pump relay may be bypassed by the oil pressure switch activating the fuel pump.

LOCATION

Relay Center.

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