System Operation: Fuel
When equipped with a single fuel tank, the IPC receives the fuel level data from a single fuel level sender. The IPC sends a reference voltage to the fuel level sender. As the fuel level changes, a float actuates the variable resistor fuel level sender, raising or lowering the fuel level signal voltage. The IPC monitors the changes in voltage from the sender and commands the fuel gauge with a corresponding movement of the pointer on the fuel gauge.
When equipped with dual fuel tanks, the IPC receives fuel level data from both primary and auxiliary fuel level senders. The fuel pump operates a jet pump (part of the fuel pump and sender unit) that transfers fuel from the auxiliary fuel tank to the primary fuel tank. This functions similar to the saddle-type fuel tank design except that there are 2 separate fuel tanks that need to be refueled independent of one another. The primary fuel tank maintains a higher level of fuel due to the transfer function of the jet pump module. For additional information about the fuel pump and fuel transfer operation, Refer to: Fuel System - Overview . The IPC sends a reference voltage to the fuel level senders. As the fuel level changes, a float actuates the variable resistor fuel level senders, raising or lowering the fuel level signal voltages. The IPC monitors the changes in voltage from both senders, calculates an overall fuel level and commands the main fuel gauge with a corresponding movement of the pointer. In addition to the main fuel gauge, the message center provides virtual fuel gauges for each individual tank on all Instrument Panel Clusters (IPCs).
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The IPC uses 4 different operating modes to calculate the fuel level:
- Anti-slosh (default mode)
- Key OFF fueling
- Key ON fueling
- Recovery
When equipped with a single fuel tank, the IPC receives the fuel level data from a single fuel level sender. The IPC sends a reference voltage to the fuel level sender. As the fuel level changes, a float actuates the variable resistor fuel level sender, raising or lowering the fuel level signal voltage. The IPC monitors the changes in voltage from the sender and commands the fuel gauge with a corresponding movement of the pointer on the fuel gauge.
When equipped with dual fuel tanks, the IPC receives fuel level data from both primary and auxiliary fuel level senders. The fuel pump operates a jet pump (part of the fuel pump and sender unit) that transfers fuel from the auxiliary fuel tank to the primary fuel tank. This functions similar to the saddle-type fuel tank design except that there are 2 separate fuel tanks that need to be refueled independent of one another. The primary fuel tank maintains a higher level of fuel due to the transfer function of the jet pump module. For additional information about the fuel pump and fuel transfer operation, Refer to: Fuel System - Overview . The IPC sends a reference voltage to the fuel level senders. As the fuel level changes, a float actuates the variable resistor fuel level senders, raising or lowering the fuel level signal voltages. The IPC monitors the changes in voltage from both senders, calculates an overall fuel level and commands the main fuel gauge with a corresponding movement of the pointer. In addition to the main fuel gauge, the message center provides virtual fuel gauges for each individual tank on all Instrument Panel Clusters (IPCs).
The IPC uses 4 different operating modes to calculate the fuel level:
- Anti-slosh (default mode)
- Key OFF fueling
- Key ON fueling
- Recovery