The wastegate is controlled by the engine's electronic control unit (ECU). The ECU monitors various engine parameters, such as engine speed, load, and boost pressure, and adjusts the wastegate position accordingly. This ensures that the turbocharger is operating within its safe limits and that the engine is producing the desired power output.
In addition to the wastegate, the turbocharger in a 2004 Hilux diesel SR5 is also equipped with a variable geometry turbocharger (VGT). The VGT uses movable vanes to control the flow of exhaust gas through the turbocharger. This allows the turbocharger to produce boost pressure more quickly at low engine speeds, resulting in improved throttle response and acceleration.
The VGT is also controlled by the ECU, which adjusts the vane position based on engine speed, load, and boost pressure. This ensures that the turbocharger is operating efficiently and that the engine is producing the desired power output.
