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Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Electronic Engine Controls - V8 S/C 5.0L Petrol -- Range Rover/L405) >> Electronic Engine Controls - V8 S/C 5.0L Petrol >> Electronic Engine Controls (Description And Operation) >> Description And Operation >> Description >> Accelerator Pedal Position (App) Sensor

Accelerator Pedal Position (App) Sensor

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The Accelerator Pedal Position (APP) sensor allows the PCM to determine the driver requests for vehicle speed, acceleration and deceleration. The PCM uses this information, together with information from the Anti-lock Brake System (ABS) control module and the Transmission Control Module (TCM), to determine the setting of the electric throttle.

Three screws attach the APP sensor and integrated accelerator pedal to a bracket on the lower instrument panel. A six pin electrical connector provides the interface with the vehicle harness.

The APP sensor is a twin track potentiometer. Each track receives an independent power supply from the PCM and returns an independent analog signal to the PCM. Both signals contain the same positional information, but the signal from track 2 is half the voltage of the signal from track 1 at all positions.

If both signals have a fault, the PCM adopts a limp home mode, which limits the engine speed to 2000 Revolutions Per Minute (RPM) maximum.

The PCM constantly checks the range and plausibility of the two signals and stores a fault code if it detects a fault.

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