Electronically Controlled Actuator
If turbocharger actuator is removed for any reason, the actuator must be calibrated to the turbo with turbocharger actuator installation procedure. Reinstallation without calibrating turbo actuator may result in a DTC.
If turbocharger actuator calibration procedure is interrupted without completing, it may result in a P003A. Turbo actuator must be recalibrated using the turbo actuator installation procedure.
The Electronically Controlled Actuator is mounted to the turbocharger bearing housing. The actuator consists of an integrated controller and a gear train that controls the position of the sliding nozzle ring. The actuator uses a signal from the Powertrain Control Module (PCM) to control the relationship between the sliding nozzle ring and turbine blades.
Moving the nozzle ring rearward or forward redirects the exhaust flow so that the turbine wheel spins faster or slower as needed
- If the sliding nozzle is moved rearward, the turbocharger builds more pressure (turbine wheel moves faster)
- If the sliding nozzle is moved forward, the turbocharger builds less pressure (turbine wheel moves slower)