Fuel Pump: Testing and Inspection

FUEL PUMP UNIT INSPECTION [LF, L3]

Continuity Inspection

1. Disconnect the negative battery cable.

2. Disconnect the fuel pump unit connector.

3. Inspect for continuity between the following fuel pump unit terminals.

California emission regulation applicable model
- B and C






Except for California emission regulation applicable model
- A and E






- If there is continuity, perform the "Circuit Open/Short Inspection".
- If there is no continuity, replace the fuel pump.

Circuit Open/Short Inspection

1. Inspect the following wiring harnesses for open or short circuit (continuity check).











Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the harness.

- Fuel pump unit terminal C*1, A*2 and fuel pump relay terminal C
- Fuel pump unit terminal B*1, E*2 and body ground

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the harness.

- Fuel pump unit terminal C*1, A*2 and body ground
- Fuel pump unit terminal B*1, E*2 and power supply

*1
California emission regulation applicable model
*2
Except for California emission regulation applicable model

Fuel Static Pressure Inspection

NOTE:
- The fuel static pressure inspection cannot be performed because the pressure regulator is integrated with the fuel pump unit.