Daewoo Nubira Owner's Manual page 733

Description
Fuel Level Sensor Procedures
4. Disconnect the Wiring Harness Electrical
Connector from the Fuel Pump Module.
5. Turn the ignition switch to the "ON" position.
6. Using a suitable DVOM, measure voltage at
the Wiring Harness Electrical Connector
between terminal 1 and chassis ground. If a
5-V reference voltage is not present, repair
the open circuit between terminal B5 of the
ECM/PCM and the Wiring Harness Electrical
Connector. If a 5-V reference voltage is
present, go to the next step.
7. Measure the voltage at the Wiring Harness
Electrical Connector between terminals 1 and
6. If a 5-V reference voltage is not present,
repair the open circuit between terminal 6 of
the Wiring Harness Electrical Connector and
terminal D8 of the ECM/PCM. If a 5-V
reference voltage is present, go to the next
step.
8. Turn the Ignition Switch to the "OFF" position.
9. Reconnect the Wiring Harness Electrical
Connector to the Fuel Pump Module.
10. Remove the Fuel Pump Relay from the
Engine Compartment Fuse/Relay Box.
11. Start the engine and allow it to idle until the engine stalls. Crank the engine an additional
10 seconds, then turn the Ignition Switch to the "OFF" position.
Note: The engine should stall in less than 10 seconds once Fuel Pump Relay is
removed.
12. Remove the Fuel Filler Cap.
13. Disconnect the Fuel Outlet Hose from the Fuel Pump Module.
14. Disconnect the Fuel Tank Return Hose from the Fuel Pump Module.
15. Disconnect the Wiring Harness Electrical Connector.
16. Using a suitable hammer and brass drift, release the Fuel Pump Module Retaining Ring
by rotating it counterclockwise.
17. After removing the Fuel Pump Module Retaining Ring, remove the Fuel Pump Module
from the Fuel Tank.
CAUTION: Removing components from a sealed fuel system exposes fuel vapors to
outside oxygen and possible sources of combustion. A fuel system should
only be opened in a properly ventilated area. Special caution should be
used when removing components from a fuel tank or fuel system. Removal
of such components should only be done away from open flame (torches,
lit cigarettes, heater pilots or other flames however minor) or sparks
(mechanical, electrical or otherwise) that could cause fuel vapors to ignite.
August, 2001
Wiring Harness Electrical Connector
Terminal "1"
Wiring Harness Electrical Connector
Terminal "1"
Page
2 of 7
Terminal "6"