Diagnostic Procedure
DIAGNOSTIC PROCEDURES - U110C-NO FUEL LEVEL BUS MESSAGE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 |
NOTE:
If a fuel level circuit or performance DTC is set along with P1681, diagnose the circuit/performance DTC before continuing. Turn the ignition on.With the DRBIII®, erase DTCs.Start the engine on and off several times. Leave the engine running for at least 20 second each time.With the DRBIII®, read DTCs.Does the DTC reset?Yes --> Go To 2No --> Refer to the INTERMITTENT CONDITION SYMPTOM .Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |
| 2 | Ignition on, engine not running. With the DRBIII®, attempt to communicate with the BCM. Can communication be established with the BCM? Yes --> Go To 3 No --> Refer to the COMMUNICATION CATEGORY and perform the appropriate symptom related to no communication with BCM. Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |
| 3 | Turn the ignition on. Using the DRBIII®, read the Fuel Level parameter in the PCM. Does the DRBIII® display a fuel level value? Yes --> Replace and program the Powertrain Control Module in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 1 . No --> Go To 4 |
All |
| 4 | Turn the ignition off. Disconnect the PCM harness connectors. Disconnect the BCM harness connector.
CAUTION:
DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS. Measure the resistance of the PCI Bus circuit from the BCM harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes --> Replace BCM in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 1 . No --> Repair the PCI Bus circuit between the PCM and the BCM for an open. Perform POWERTRAIN VERIFICATION TEST VER - 1 . |
All |