Parts for your 2017 Toyota Crown-Throttle position sensors

2017 Toyota Crown throttle position sensors

Based on Toyota’s own technical literature, the 2017 Toyota Crown does use throttle position sensors. Toyota’s ETCS‑i (Electronic Throttle Control System – intelligent), detailed in the Toyota New Car Features (NCF) manual for the S210-series Crown and corresponding Repair Manuals for the 8AR‑FTS, 2AR‑FSE and 2GR‑FSE powertrains, specifies a throttle body with an integrated throttle control motor and dual throttle position sensor circuits (often referenced as VTA1/VTA2). Related diagnostic sections list TPS-associated DTCs (e.g., P0120–P0124, P2135), confirming the sensor’s role in this model range.

On a 2017 Toyota Crown, the throttle position sensors are built into the throttle body assembly and continuously tell the engine control module exactly where the throttle plate is. Paired with the accelerator pedal position sensor, they let the ETCS‑i match driver demand to engine airflow with precision. That’s how the Crown delivers smooth take‑off in city traffic and crisp response on the open road, all while keeping emissions in check. Because the sensors are integral to the throttle body, Toyota treats the unit as a single service part: if the sensor fails, the complete throttle with motor assembly is typically replaced.

As part of routine servicing, it’s smart to keep the throttle body clean. Under the bonnet, a gentle clean of the throttle bore with a proper throttle-body-safe cleaner helps prevent sticky plates and wayward idle. Don’t force the plate open by hand, and avoid soaking the motor housing. If the battery’s been disconnected or the throttle body is replaced, a throttle learning/initialisation step via a scan tool (Toyota Techstream is the factory method) may be needed to stabilise idle. When faults crop up, watch for these clues:

• Unstable idle, stalling at lights, or hunting revs
• Sluggish acceleration or limp-home behaviour
• Check engine light with TPS/ETCS‑i DTCs logged

If any of that turns up, a technician will verify the dual-sensor signals (they track each other for safety), check wiring continuity, and confirm 5‑volt reference and grounds. Because the sensors are non-serviceable, replacement means a new throttle body, fresh gasket, correct torque on fasteners, and an electronic reset. With quality fuel, clean filters, and periodic throttle hygiene, most Crowns clock up heaps of kilometres without TPS drama.

Popular questions about 2017 Toyota Crown throttle position sensors

Where is the throttle position sensor on a 2017 Toyota Crown?

It’s integrated into the throttle body on the intake side of the engine, just downstream of the air intake hose. You won’t find a separate bolt‑on TPS, Toyota combines the sensor with the throttle control motor.

There’s also an accelerator pedal position sensor at the pedal, but that’s a different unit. Techs diagnose both sides to rule out wiring or correlation faults.

Do the throttle position sensors need calibration after replacement?

Yes. After fitting a new throttle body, an idle learn/initialisation with a scan tool is recommended so the ECU can relearn throttle plate angles and airflow. That helps avoid high or wandering idle.

Some cars will self‑learn over a few drive cycles, but using Techstream or an equivalent tool speeds it up and keeps the idle neat as.

What are the signs the TPS is playing up?

Common signs include erratic idle, hesitation off the line, cruise control dropping out, and a check engine light. You may feel the car default to reduced power if the signals don’t agree.

Scan for codes like P0121 or P2135 and inspect wiring and grounds before calling the throttle body. Cleaning the bore can also help if the plate is sticking.