TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Measure the resistance between ground and the Fuel Level Signal circuit at the Fuel
Pump Module harness connector.
Is the resistance below 100 ohms?
All
Yes → Repair the short to ground in the Fuel Level Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 4
4 Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Disconnect the BCM harness connector.
Measure the resistance of the Fuel Level Signal circuit from the Fuel Pump Module
harness connector to the BCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes → Go To 5
No → Repair the open in the Fuel Level Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
5 Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Measure the resistance of the Ground circuit from the Fuel Pump Module harness
connector to ground.
Is the resistance below 5.0 ohms?
All
Yes → Go To 6
No → Repair the open in the Ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
6 WARNING: The fuel system is under a constant pressure even with the
engine off. Before opening the fuel system the fuel pressure must be release.
Relieve the fuel pressure in accordance with the service information.
Inspect the following components.
- Siphon hose for restrictions or being disconnected.
- Siphon Inlet and Outlet tube on the Fuel Modules for restrictions.
- Fuel Pump Inlet Strainers for restrictions.
- Fuel Tank for any obstructions or deformities.
- Fuel Pump Module Float arm for damage.
Were any problems found?
All
Yes → Repair or replace as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Replace the Fuel Level Sensor.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
268
DRIVEABILITY - NGC
P1861-SIPHON LINE DISCONNECTED — Continued