Electronic throttle
Electronic throttle: Electronic throttle converts pedal request through ECU torque strategy into plate angle using a DC motor/H-bridge. The page also includes a worked example and measurement sequence.
Technical frame
Electronic throttle: Electronic throttle converts pedal request through ECU torque strategy into plate angle using a DC motor/H-bridge. The page also includes a worked example and measurement sequence.
The technical values here expose the standard, protocol or physical relationship directly; model-specific service values are linked through the matching model/variant dossier.
The goal is not only to define the term but to let the reader calculate and interpret what the data means in a scan, scope or physical test.
Concrete technical facts
- Electronic throttle converts pedal request through ECU torque strategy into plate angle using a DC motor/H-bridge.
- Many applications use two independent/opposed pedal and throttle-position channels for plausibility; exact transfer functions are vehicle-specific.
- The throttle motor can be PWM-driven, so commanded angle, actual angle, motor current and supply belong on the same timeline.
- Contamination or mechanical sticking can cause higher motor current and slower angle response for the same electrical command.
- A shared 5 V reference/ground fault can disturb both position channels and mimic a component fault.
- An adaptation/learn procedure can relearn mechanical stops and sensor relationships; a reset is not a repair if root cause remains.
Worked example
- Example: if target angle is 40% but actual remains at 15% while motor current rises markedly, mechanical load/sticking becomes more likely than a low-current no-response condition.
Measurement and verification sequence
- Log APP1/APP2 and TPS1/TPS2 together.
- Correlate commanded/actual throttle angle with motor PWM/current.
- Verify power and ground with loaded voltage-drop tests.
- Inspect the throttle mechanism for contamination/sticking using the safe OEM procedure.
Fault-separation logic
- Is a valid command present and are power/ground/network healthy?
- Does feedback follow the command?
- Does an independent physical measurement confirm the output?
- Is the fault limited to a specific temperature/load/speed condition?
- Does the result remain stable when the original condition is repeated after repair?
Technical sources
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