B2300 SE Regular Cab 2WD L4-2.3L VIN A (1997)
Fuel Pump Relay: Testing and Inspection
NOTE:
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If the fuel pump relay or circuit has an open or short, Diagnostic Trouble Code No. P0230, P0231 or P0232 is output.
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If the circuit is open, the engine will not start.
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If the circuit is shorted, the fuel pump will operate whenever the ignition switch is ON.
Operational Check
Install the fuel pump relay and listen for clicking of the fuel pump relay while cranking the engine.
Continuity Inspection
1. Measure resistance between pins 85 and 86 at the relay.
Specification: 40-120 Ohms
2. Measure resistance between pin 85 and both pins 30 and 87 of relay.
Specification: Greater than 10,000 Ohms.
3. Apply battery positive voltage (B+) and check continuity between terminals of the relay.
4. If not as specified, replace the fuel pump relay.
