Cumminz

Circuit DescriptionThe WIF sensor is attached to the fuel filter. The WIF sensor sends a signal to the electroniccontrol module (ECM) when a set volume of water has accumulated in the fuel filter. The WIFcircuit contain two wires: A return ground (pin 20), and a signal wire (pin 40). Component LocationThe water-in-fuel sensor is installed in the fuel filter and is located on the side of the headapproximately midway on the engine.

Circuit DescriptionThe idle validation switch (IVS) is used by the electronic control module (ECM) to indicatewhen the accelerator pedal is released (on-idle) or depressed (off-idle). The switch is adjustedby the accelerator pedal manufacturers to switch from on-idle to off-idle at the correctaccelerator pedal position. NOTE: The connector pin letters shown for the accelerator pedal wiring in thesetroubleshooting steps are examples of representative sensors. The connector pin assignmentscan vary with the equipment manufacturer, but the base troubleshooting logic will still apply. Component LocationThe idle validation switch is located on the accelerator pedal assembly. Shop TalkThis fault code is usually caused by...

Circuit DescriptionThe idle validation switch (IVS) is used by the electronic control module (ECM) to indicatewhen the accelerator pedal is released (on-idle) or depressed (off-idle). The switch is adjustedby the accelerator pedal manufacturers to switch from on-idle to off-idle at the correctaccelerator pedal position. NOTE: The connector pin letters shown for the accelerator pedal wiring in thesetroubleshooting steps are examples of representative sensors. The connector pin assignmentscan vary with the equipment manufacturer, but the base troubleshooting logic will still apply. Component LocationThe idle validation switch is located on the accelerator pedal assembly. Shop TalkThis fault code is usually caused by...

Circuit DescriptionThe accelerator pedal assembly relays the accelerator percentage requested by the operatorto the electronic control module (ECM). Percent accelerator is used to determine fueling. Theaccelerator position sensor and the idle validation switch on the accelerator pedal are adjustedat the factory to provide the correct output signals. NOTE: The connector pin letters shown for the accelerator pedal wiring in thesetroubleshooting steps are examples of representative sensors. The connector pin assignmentscan vary with the equipment manufacturer, but the base troubleshooting logic will still apply. Component LocationThe accelerator position sensor and the idle validation switch are located on the acceleratorpedal in the...

Circuit DescriptionThe intake manifold pressure sensor monitors intake manifold pressure and passes information to theelectronic control module (ECM) through the engine harness. If intake manifold pressure becomes toohigh, it will cause a derate condition. Component LocationThe intake manifold pressure sensor is located in the side of the intake manifold, just to the right ofthe fuel filter. Shop TalkThe ECM checks for this fault only at idle speed. If the intake manifold pressure shows too high of avalue at this time, the ECM will log a fault code.