Test NS-5A - Checking Fuel Pump
NOTE:
Perform TEST NS-2A before proceeding.
- Turn ignition off. Disconnect fuel pump relay. For fuel pump relay location, See Fig 1. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector fused ignition switch output circuit. See Figure. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open fused ignition switch output circuit. Perform TEST VER-2A.
- Install a substitute relay. Attempt to start engine. If engine does not start, go to next step. If engine started, replace fuel pump relay. Perform TEST VER-1A.
- Reinstall original fuel pump relay. Disconnect fuel pump harness connector. See FUEL PUMP CONNECTOR LOCATION table. Turn ignition on. Using scan tool, actuate ASD fuel system. Using scan tool in voltmeter mode, check voltage of fuel pump relay output circuit at fuel pump connector (harness side). See the CONNECTOR IDENTIFICATION DIRECTORY. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open fuel pump relay output circuit. Perform TEST VER-1A.
- Turn ignition off. Using scan tool in ohmmeter mode, check resistance of fuel pump ground circuit at fuel pump connector (harness side) Black wire. If resistance is less than 5 ohms, replace fuel pump. Perform TEST VER-1A. If resistance is 5 ohms or more, repair open fuel pump ground circuit. Perform TEST VER-1A.
FUEL PUMP CONNECTOR LOCATION
| Application | Location |
|---|---|
| 3.5L | Under Access Cover In Trunk Floor Panel |