Impulse Hatchback L4-1809cc 1.8L DOHC (4XF1-W) (1992)
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Chart A-5 Fuel Pump Relay Circuit
CIRCUIT DESCRIPTION:
When the ignition switch is turned "ON," the ECM will activate the fuel pump relay and operate the in-tank fuel pump. The fuel pump will operate as
long as the engine is cranking or running and the ECM is receiving ignition reference pulses. If there are no reference pulses, the ECM will shut "OFF"
the fuel pump within 2 seconds after key "ON."
TEST DESCRIPTION: The numbers below refer to circled numbers on the diagnostic chart.
1.
Checks for the presence of B+ at switching portion of fuel pump relay.
2.
Checks circuit between fuel pump relay and ground (including the fuel pump).
3.
This test will confirm if voltage is available to the relay coil.
DIAGNOSTIC AIDS:
