Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, erase DTCs.
3. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
FUEL LEVEL SENSOR 2
1. Turn the ignition off.
2. Disconnect the Fuel Pump Module C2 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  NOTE:
  The P2068-FUEL LEVEL SENSOR 2 CIRCUIT HIGH DTC should be active or pending with the harness connector unplugged.
  
  Does the scan tool display as described above?
  
  Yes
  - Replace the Fuel Level Sending Unit in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (N5) FUEL LEVEL SIGNAL 2 CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM C5 harness connector.
3. Check for continuity between ground and the (N5) Fuel Level Signal 2 circuit at the Fuel Pump Module C2 harness connector.
  Is there continuity between ground and the (N5) Fuel Level Signal 2 circuit?
  
  Yes
  - Repair the (N5) Fuel Level Signal 2 circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (N5) FUEL LEVEL SIGNAL 2 CIRCUIT FOR A SHORT TO THE (G109) FUEL LEVEL SENSE RETURN CIRCUIT
1. Check for continuity between the (N5) Fuel Level Signal 2 circuit and the (G109) Fuel Level Sense Return circuit at the Fuel Pump Module C2 harness connector.
  Is there continuity between the (N5) Fuel Level Signal 2 circuit and the (G109) Fuel Level Sense Return circuit?
  
  Yes
  - Repair the short between the (N5) Fuel Level Signal 2 circuit and the (G109) Fuel Level Sense Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
BODY CONTROL MODULE (BCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Level Sensor 2 and the BCM.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Fuel Level Sensor 2 and the BCM harness connectors.
4. Perform any Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .