APP sensor 1 signals voltage increases as the pedal is depressed.
Gm Fly By Wire Gas Pedal Throttle Body Series Engine FamilyElectronic throttle was released before cable throttle for the LS-series engine family.In 1998, the Camaro and Firebird received a cable throttle LS1 engine.
The GM trucks received LSseries engines in 1999 and, depending on makemodel, were available with either cable throttle or electronic throttle. Navigating through the various electronic throttle equipment may be intimidating, but look carefully at the components to ensure success. For a comprehensive guide on this entire subject you can visit this link. Other than a few GM part number updates, the equipment remained the same and electronic throttle equipment can be interchanged. Everything changed (throttle body, pedal assembly, and TAC) when the LS2 engine was introduced in 2005. Choosing the wrong components could result in no throttle response and an illuminated MIL lamp. It is also fitted with a motor, operated by the TAC module, to open and close the throttle blade. The TPS housing contains two individual sensors with separate signals, low reference, and 5V circuits. As the throttle blade is opened, TPS sensor 1 voltage sweeps toward 5V reference, and TPS sensor 2 voltage sweeps toward low reference. These opposing signals are used by the PCM to monitor and make one throttle angle PID available. Gm Fly By Wire Gas Pedal Throttle Body Upgrade Or AnThe larger 90-mm throttle opening and four-bolt pattern requires an intake manifold upgrade or an adapter plate. The throttle position sensor is mounted on the bank 2 side of the engine and the throttle shaft motor is mounted on the bank 1 side of the engine. The blade on this throttle body measures approximately 75 mm in diameter. The blade on this throttle body measures approximately 90 mm in diameter. Because the bore is larger and the four-bolt pattern is different than the three-bolt pattern of the LS1 intake manifold, the use of this throttle body requires a different intake manifold or adapter plate. A DTC sets if a TPS value exceeds one of GMs predetermined threshold values. This chart reviews the allowable operating ranges for each TP sensor (see TPS Failure) and the expected 0-percent and 100-percent voltage ranges for each TP sensor. Notice the 5V reference and low reference for TP sensor 2 is not used because TP signal 1 and TP signal 2 share the same 5V reference and low reference from the TAC module. This chart reviews the allowable operating ranges for each APP sensor (see APP Failure) and the expected 0- and 100- percent voltage ranges for each APP sensor. The TAC module uses the three APP signals to determine absolute pedal position.
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