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Home >> Land Rover >> 2022 >> Defender 90 S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Electronic Engine Controls - V8 S/C 5.0L Petrol -- Defender/L663) >> Electronic Engine Controls - V8 S/C 5.0L Petrol (G2796672) >> Description And Operation >> Electronic Engine Controls - V8 S/C 5.0L Petrol (G2796673) >> Description >> Accelerator Pedal Position Sensor

Accelerator Pedal Position Sensor

WARNING: This page is about a different variant/trim than selected.
NOTE: Right Hand Drive (RHD) vehicle is shown, Left Hand Drive (LHD) vehicle is similar.
G15306802Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

The APP  sensor allows the PCM  to determine the driver requests for vehicle speed, acceleration and deceleration. The PCM  uses this information and inputs from the Anti-Lock Brake System Control Module (ABS) and the Transmission Control Module (TCM). The PCM  then determines the setting of the electric throttle.

There are 3 screws that attach the APP  sensor and integrated accelerator pedal to a bracket on the lower instrument panel. A 6-pin electrical connector provides the interface with the vehicle wiring 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. 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. The limp home mode limits the engine speed to 2, 000 RPM  maximum.

The PCM  constantly checks the range and plausibility of the 2 signals and stores a Diagnostic Trouble Code(s) (DTC) if it detects a fault.

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