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Fuel Pump: Testing and Inspection




FUEL PUMP UNIT INSPECTION [13B-MSP]

Continuity Inspection

1. Disconnect the negative battery cable.

2. Disconnect the fuel pump unit connector.

3. Inspect for continuity between fuel pump unit connector terminals B and D.






- If there is no continuity, replace the fuel pump unit. Removal and Replacement
- If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection

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






Open circuit

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

- Fuel pump unit terminal D and body GND
- Fuel pump unit terminal B and main relay terminal C

Short circuit

- If there is no continuity, the circuit is shorted. Repair or replace the wiring harness.

- Fuel pump unit terminal D and power supply
- Fuel pump unit terminal B and body GND

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