DESCRIPTION & OPERATION
A solid state relay senses negative pulsations at the ignition coil and switches the pump on when the engine is running or the starter is engaged. Relay is located under dash panel at the left side of driver's compartment. Circuit is protected by a fuse in the fuse box as well an in-line fuse.
The electric fuel pump is located at the rear corner of vehicle on Accord models; left corner of fuel tank on Prelude models. Fuel pump is a sealed unit and is serviceable as an assembly.
CUT-OFF RELAY
- Remove fuse box panel mounting bolt and nut. Pull down panel and remove fuel pump cut-off relay. Turn ignition switch to "ON" position. Connect positive probe of voltmeter to Black/Yellow wire terminal of fuel pump cut-off relay connector. If no voltage, check fuse and continuity of Black/Yellow wire.
- If voltage is present, check Blue wire at cut-off relay for battery voltage. If Blue wire does not show battery voltage, check for continuity between connector and negative side of coil.
- Turn ignition switch to "OFF" position. Attach jumper wire between the 2 Black/Yellow wires of connector. Turn ignition switch to "ON" position.
- If fuel pressure is now available and battery voltage was present at Blue wire, replace the cut-off relay. If no pressure is available, unplug fuel pump leads at pump.
- Attach positive lead of voltmeter to the Black/Yellow wire and negative lead to Black wire. Battery voltage should be present with ignition on. If not, check continuity of Black/Yellow wire from relay and Black wire to ground.
PRESSURE TEST
- Attach jumper wire between 2 Black/Yellow wires in fuel pump cut-off relay connector. Disconnect fuel hose to carburetor and cap "T" fitting. Install pressure gauge to fuel hose. Turn ignition switch on and check for normal pressure of 2-3 psi (.14-.21 kg/cm 2 ).
- Remove pressure gauge and hold measuring cup under fuel hose. Turn ignition switch to "ON" position. Measure amount of fuel flow in 60 seconds with 10 volts minimum battery voltage. Flow should as indicated in FUEL FLOW SPECIFICATIONS chart. If not replace fuel pump.
| Application | Volume: oz./min.(cc/min.) |
|---|---|
| Accord | 15(450) |
| Prelude | 23(680) |
FUEL FLOW SPECIFICATIONS
REMOVAL & INSTALLATION
- Raise and support vehicle. Remove left rear wheel. Unplug electrical leads at fuel pump and clamp fuel lines between pump and tank.
- Remove fuel pump cover bolts. lift off cover and pump as an assembly. Disassemble pump from cover. To install, reverse removal procedure.
