Fuel Pump Relay: Testing and Inspection
Simulation Test1. Carry out the "Fuel Pump Operation Inspection", "Fuel Pump Control Inspection".
- If not as specified, perform the further inspection for the fuel pump relay.
Continuity Inspection
NOTE: Perform the following test only when directed.
1. Disconnect the negative battery cable.
2. Remove the fuel pump relay.
3. Inspect for continuity between the fuel pump relay terminals using an ohmmeter.
- If not as specified, replace the fuel pump relay.
- If as specified but the "Simulation Test" is failed, carry out the "Circuit Open/Short Inspection".
Circuit Open/Short inspection
1. Remove the PCM.
2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.
Tightening torque:
7.9 - 10.1 Nm {80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}
4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
Open circuit
- GND circuit (fuel pump relay connector terminal B and PCM connector terminal 80 through common connector)
- GND circuit (fuel pump relay connector terminal C and fuel pump unit connector terminal B through common connector)
- Power circuit (fuel pump relay connector terminal A or E and main relay connector terminal D through common connector)
Short circuit
- Fuel pump relay connector terminal B and PCM connector terminal 80 through common connector to GND
- Fuel pump relay connector terminal C and fuel pump unit connector terminal B through common connector to GND
5. Install the fuel pump relay.
6. Reconnect the negative battery cable.