IPC Display | Description |
|---|---|
PDS: x LWS: x | Park detect switch (0 = open/not park, 1 = closed/park). |
Engineering Test Mode Use Right Up/Down to scroll screens | Repeats the test display cycle. |
Analog Gauges
Fuel Gauge
The IPC sends a reference voltage to the fuel level sender(s). 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 both senders and commands the fuel gauge with a corresponding movement of the pointer.
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
Anti-Slosh Mode
The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sensor readings caused by fuel moving around in the tank), the fuel gauge takes approximately 40 minutes to go from empty (E) to full (F).
Key OFF Fueling Mode
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions to be met:
The ignition must be in the OFF mode when refueling the vehicle. At least 6% of the vehicle's fuel capacity must be added to the fuel tank. The IPC must receive a valid ignition ON fuel sensor reading within one second of the ignition being put into the RUN mode. The key ON sample readings are considered valid if the fuel sensor reading is between 10 ohms ± 2 ohms and 180 ohms ± 4 ohms.
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
The key ON fueling mode (approximately 60 seconds to read empty [E] to full [F]) requires the following conditions be met:
The transmission is in PARK (P) or NEUTRAL (N). The ignition is in the RUN mode. At least 6% of the vehicle's fuel capacity must be added to the fuel tank
Key ON Fueling Mode
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) or NEUTRAL (N) position. When the 30-second time has elapsed and at least 9% of the vehicle's fuel capacity has been added, the fuel gauge response time is 60 seconds to read from empty (E) to full (F). When the transmission is shifted
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.