Prizm L4-1600cc 1.6L DOHC VIN 5 (1989)
Circuit Opening Relay: Description and Operation
The ECM controls "ON/OFF" operation of the fuel pump by turning it "ON" via the fuel pump relay under any of the following conditions:
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For 2 seconds after ignition switch "ON."
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While cranking engine (while engine start signal is received by the ECM).
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The crank angle sensor signal is received by the ECM.
