Bi-Fuel Models

CAUTION:
^ Prior to removal of the Hybrid Electronic Cluster (HEC), it is necessary to upload module configuration information to the scan tool. This information needs to be downloaded into the new module once installed. For additional information, refer to Module Communications Network.
^ Electronic modules are sensitive to electrical charges if exposed to these charges, damage may result.

NOTE:
^ Refer to Instrument Cluster, Conventional for Instrument Cluster Module (ICM) concerns that are not bi-fuel specific and not related to the fuel gauge.
^ The hybrid electronic cluster (HEC) must be reconfigured upon replacement. Refer to Module Communications Network.
^ Refer to Instrument Cluster, Conventional for ICM and Generic Electronic Module/Central Timer Module (GEM/CTM) indexes (DTCs, PIDs, and active commands).

As a technician it is very important to understand:
^ where the input (command) originates from.
^ all information (messages) necessary in order for a feature to operate.
^ which module(s) receive(s) the input or command message.
^ which module controls the output of the feature.

Instrument Cluster Replacement
When instrument cluster replacement is necessary, contact the Instrument Cluster Program at 1-800-259-9700 (U.S.) or 1-800-663-9974 (Canada).

Gauge Indication Systems
The gauge indication systems use magnetic gauges mounted in the instrument cluster. No adjustment, calibration, or maintenance is required for any gauges. The gauges cannot be installed separately.

Fuel Gauge Indication

NOTE: If the bi-fuel vehicle does not operate correctly in alternative fuel mode, refer to Powertrain Management.

A single fuel gauge is used for both alternative fuel and gasoline level indication. The fuel indication system uses a fuel pump intercept harness, compuvalve, dash reset relay, Liquid Petroleum Gas (LPG) sensor, Compressed Natural Gas (CNG) Fuel Tank Pressure Sensor (FTPS) combined with the gasoline fuel pump and fuel sensing circuitry. In the gasoline operating mode, the fuel sender information is passed thorough the fuel pump intercept harness directly to the instrument cluster fuel level gauge. In alternative fuel mode the compuvalve receives the alternate fuel level signal and sends it to the instrument cluster fuel level gauge via the Stand Corporate Protocol (SCP) line.