Electric Throttle

WARNING: This page is about a different variant/trim than selected.

The Powertrain Control Module (PCM) uses the electric throttle to regulate engine torque.

The electric throttle is installed between the clean air duct and the supercharger. For additional information, refer to: INTAKE AIR DISTRIBUTION AND FILTERING

The throttle plate is operated by an electric Direct Current (DC) motor integrated into the throttle body. The PCM uses a Pulse Width Modulation (PWM) signal to control the DC motor. The PCM compares the Accelerator Pedal Position (APP) sensor inputs against an electronic map to determine the required position of the throttle plate. The PCM and electric throttle are also required to:

Monitor requests for cruise control operation
Automatically operate the electric throttle for accurate cruise control
Perform all dynamic stability control engine interventions
Monitor and carry out maximum engine speed and road speed cut outs
Provide different engine maps for the ride and handling optimization system.

A software strategy within the PCM calibrates the position of the throttle plate at the beginning of each ignition cycle. When the ignition is turned on, the PCM performs a self test and calibration routine by fully closing the throttle plate and then opening it again. This tests the default position springs and allows the PCM to learn the fully closed position.