The throttle valve of the V8 engine management system is electronically controlled. The throttle valve is located on the intake manifold in the engine compartment. The throttle control circuit consists of three main components:
- Throttle valve with electric drive and electronic control
- APP (accelerator pedal position sensor)
- ECM (the engine control unit)
Pressing the accelerator pedal changes the APP sensor control signals (accelerator pedal position sensor). ECM (the engine control unit) compares this change with the electronic data card and via PWM signals (pulse width modulation), proportional to the APP sensor signals (accelerator pedal position sensor), moves the throttle. The main purpose of the system is:
- Ensuring air intake in the amount determined by the position of the accelerator pedal and the electronic data card.
- Control of driver commands for speed control.
- Automatic electronic throttle positioning for precise speed control.
- Damper control at the request of stability control systems.
- Limitation of the maximum speed of movement and the maximum frequency of rotation of the crankshaft.
ECM Software (the engine control unit) provides for the calibration of the damper position in each ignition cycle. After turning on the ignition (ON position) ECM (the engine control unit) performs self-diagnosis and calibration of the electronic throttle position by fully opening and fully closing the valve.
Throttle connector pinout table
| contact no | Purpose |
| 1 | - electric motor |
| 2 | + electric motor |
| 3 | Sensor weight |
| 4 | Sensor 2 signal |
| 5 | Sensor 1 signal |
| 6 | Power supply 5 V |
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