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DRIVEABILITY - NGC
P1861-SIPHON LINE DISCONNECTED —
TEST
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?
Yes → Repair the short to ground in the Fuel Level Signal circuit.
→ Go To 4
No
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?
Yes → Go To 5
→ Repair the open in the Fuel Level Signal circuit.
No
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?
Yes → Go To 6
→ Repair the open in the Ground circuit.
No
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?
Yes → Repair or replace as necessary.
→ Replace the Fuel Level Sensor.
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Continued
268
APPLICABILITY
All
All
All
All
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