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2011-2014 Mustangs
2011-2014 Mustang Talk
P2068 Instrument cluster bad?
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<blockquote data-quote="Vinnie_B" data-source="post: 16833822" data-attributes="member: 201678"><p>These DTC'S have nothing to do with a Failing IPC [USER=159850]@InTrikit 5.0[/USER] . You have an issue in the fuel circuit.</p><p></p><p></p><ul> <li data-xf-list-type="ul">P2068 — Fuel Level Sensor B Circuit High</li> </ul><p></p><p>Sets in the PCM when the PCM detects an open or short to voltage on the fuel level sensor signal circuit on the messaged input received from the IPC .</p><p></p><p></p><p></p><p></p><ul> <li data-xf-list-type="ul">B1A76:15 — Fuel Sender No. 2: Circuit Short to Battery or Open</li> </ul><p>Here is whats happening that sets this DTC:</p><p></p><p>A continuous and on-demand DTC that sets in the IPC if the IPC detects that the fuel level sensor (RH side) is out of range on the input circuit with an open or short to voltage on circuit RMC33 (WH/VT) for 33 seconds. Once the IPC detects a fault, the IPC sets DTC B1A76:15 and the gauge displays between 1/2 and empty (E), indicating the fuel level in the LH side of the tank.</p><p></p><p></p><p></p><p>This is how the fuel tank and IPC work togather...........</p><p></p><p>The fuel tank is a saddle tank design with 2 variable resistance senders, driven by floats, that provide resistances related to fuel level in each side of the fuel tank to the Instrument Panel Cluster (IPC) . The fuel level is determined using variable resistance fuel sender units, with an approximate resistance range between 180 ohms ± 4 ohms at empty (E) and 10 ohms ± 2 ohms at full (F). The IPC provides a reference voltage to the fuel level sender (part of the fuel pump module [LH side]) and the fuel level sensor (RH side) through individual signal circuits and receives a return through the signal return circuits from both the fuel level sender (part of the fuel pump module [LH side]) and fuel level sensor. As the fuel level changes, a float actuates a variable resistor on the fuel pump module and the fuel level sensor, raising or lowering the fuel level signal voltage depending on the resistance of the fuel level sender (float and card) or fuel level sensor. The IPC monitors the changes in voltage from both senders and commands the fuel gauge with a corresponding movement of the pointer. If the IPC detects the fuel level sensor circuitry is open, the fuel gauge defaults to the fuel level sender (part of the fuel pump module [LH side]) value only and the fuel gauge displays between 1/2 and empty (E) indicating the fuel level in the LH side of the fuel tank. If the IPC detects the fuel pump module circuitry is open, the fuel gauge defaults to the empty (E) position.</p></blockquote><p></p>
[QUOTE="Vinnie_B, post: 16833822, member: 201678"] These DTC'S have nothing to do with a Failing IPC [USER=159850]@InTrikit 5.0[/USER] . You have an issue in the fuel circuit. [LIST] [*]P2068 — Fuel Level Sensor B Circuit High [/LIST] Sets in the PCM when the PCM detects an open or short to voltage on the fuel level sensor signal circuit on the messaged input received from the IPC . [LIST] [*]B1A76:15 — Fuel Sender No. 2: Circuit Short to Battery or Open [/LIST] Here is whats happening that sets this DTC: A continuous and on-demand DTC that sets in the IPC if the IPC detects that the fuel level sensor (RH side) is out of range on the input circuit with an open or short to voltage on circuit RMC33 (WH/VT) for 33 seconds. Once the IPC detects a fault, the IPC sets DTC B1A76:15 and the gauge displays between 1/2 and empty (E), indicating the fuel level in the LH side of the tank. This is how the fuel tank and IPC work togather........... The fuel tank is a saddle tank design with 2 variable resistance senders, driven by floats, that provide resistances related to fuel level in each side of the fuel tank to the Instrument Panel Cluster (IPC) . The fuel level is determined using variable resistance fuel sender units, with an approximate resistance range between 180 ohms ± 4 ohms at empty (E) and 10 ohms ± 2 ohms at full (F). The IPC provides a reference voltage to the fuel level sender (part of the fuel pump module [LH side]) and the fuel level sensor (RH side) through individual signal circuits and receives a return through the signal return circuits from both the fuel level sender (part of the fuel pump module [LH side]) and fuel level sensor. As the fuel level changes, a float actuates a variable resistor on the fuel pump module and the fuel level sensor, raising or lowering the fuel level signal voltage depending on the resistance of the fuel level sender (float and card) or fuel level sensor. The IPC monitors the changes in voltage from both senders and commands the fuel gauge with a corresponding movement of the pointer. If the IPC detects the fuel level sensor circuitry is open, the fuel gauge defaults to the fuel level sender (part of the fuel pump module [LH side]) value only and the fuel gauge displays between 1/2 and empty (E) indicating the fuel level in the LH side of the fuel tank. If the IPC detects the fuel pump module circuitry is open, the fuel gauge defaults to the empty (E) position. [/QUOTE]
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