Test QH: Fuel Level Input (FLI)

PINPOINT TEST QH: FUEL LEVEL INPUT (FLI)

Flow Chart:

This pinpoint test is intended to diagnose the following:
- instrument cluster (IC)
- powertrain control module (PCM)

-----------------------------------------------
QH1 : PRELIMINARY DIAGNOSIS

NOTE: Diagnostic trouble code (DTC) P115A may set with a low fuel level input. If an excessively low fuel level input message is received by the PCM from the IC, the PCM limits the injection control pressure (ICP). This may cause a lack of power, rough idle, or other driveability concerns. If no additional DTCs are present, the concern may have been caused by the vehicle running too low on fuel

- Ignition ON, engine OFF.
- Carry out the IPC self-test.
- Carry out the PCM self-test.
- Are any IC DTCs present or any additional PCM DTCs present?






-----------------------------------------------
QH2 : CHECK THE IC FUELLVL PID

- Access the IPC and monitor the FUELLVL PID.
- Record the FUELLVL PID value
- Compare the IC FUELLVL PID recorded value to the IC fuel gauge
- Does the IC FUELLVL PID correspond to the fuel gauge level?






-----------------------------------------------
QH3 : CHECK THE PCM FLI PID

- Access the PCM and monitor the FLI PID.
- Record the FLI PID value
- Compare the PCM FLI PID recorded value to the IC FUELLVL PID recorded value
- Does the PCM FLI PID correspond to the IC FUELLVL PID?






-----------------------------------------------
QH4 : CHECK IF A DTC IS STILL PRESENT

- Clear the DTCs.
- Carry out the self-test.
- Are DTCs P0460, P0462, P0463, P115A, P2067 or P2068 present?






-----------------------------------------------
QH5 : CHECK FOR CORRECT PCM OPERATION

- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion

- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?