Parts for your 2009 Toyota Hiace-Throttle position sensors

2009 Toyota HiAce throttle position sensor: is it there, what it does, and how to look after it

Referencing Toyota’s Global Service Information (TIS) and Repair Manuals for the H200 HiAce range, the Toyota Electronic Parts Catalogue (EPC), and trade databases such as Autodata and Haynes Pro, a throttle position sensor (TPS) is used on 2009 HiAce petrol engines (1TR‑FE 2.0L and 2TR‑FE 2.7L) as part of the ETCS‑i electronic throttle body. On the 2009 HiAce diesel (commonly the 1KD‑FTV D‑4D in AU/NZ), a conventional TPS is not used, engine load is managed by fuel quantity and an accelerator pedal position sensor. The diesel does have an intake air throttle (for EGR and smooth shutdown) with a built‑in position sensor, but this isn’t serviced or sold as a separate “TPS” in the usual sense.

For diesel owners: shopping specifically for a “TPS” isn’t relevant. Diagnosis typically focuses on the accelerator pedal position sensor, EGR/intake throttle actuator assembly, wiring, and ECU. That’s consistent with Toyota’s D‑4D documentation showing no stand‑alone TPS on the throttle body like the petrol units.

On petrol 2009 HiAce models, the TPS is integral to the throttle body with motor assembly. Its job is to report the exact angle of the throttle plate to the engine control unit (ECU) so the ECU can blend air, fuel and spark for smooth running. Because these HiAce engines use drive‑by‑wire (ETCS‑i), the assembly actually houses dual TPS tracks for redundancy and safety. When the sensor begins to drift or fails, the van can idle roughly, hesitate off the line, surge, or drop into limp mode, and may log fault codes such as P0120–P0124 or P2135.

• Typical tell‑tales: erratic idle, flat spots on acceleration, higher fuel use, and an illuminated MIL.
• Basic care: there’s no scheduled service for the TPS itself, but keeping the throttle body clean helps sensor readings remain stable. Use throttle‑body‑safe cleaner, don’t flood the electronics.
• Testing: verify power, ground and signal correlation with a scan tool. On ETCS‑i, check that both TPS tracks agree and that throttle command matches actual angle.
• Replacement tips: on these petrol HiAce engines the TPS isn’t sold separately — the fix is to replace the complete throttle body with motor and sensor assembly. After fitting, perform an ETCS/throttle learn procedure with a capable scan tool (or follow Toyota’s specified key‑on/idle adaptation steps). Confirm there are no intake air leaks and clear codes.

Quality OEM‑spec parts and a proper relearn usually restore crisp throttle response, stable idle and reliable drivability for many more kilometres.

Popular questions about 2009 Toyota HiAce throttle position sensors

Does a 2009 HiAce diesel have a throttle position sensor?
No — not in the conventional petrol sense. The 1KD‑FTV D‑4D uses an accelerator pedal position sensor for driver demand and an intake throttle/electronic valve for EGR and shutdown, which has its own position feedback. Toyota’s diesel documentation doesn’t list a standalone TPS service part.

Where is the TPS on a 2009 HiAce petrol?
It’s built into the throttle body with motor assembly on the intake. There isn’t a separate bolt‑on TPS, the sensor comes as part of the complete electronic throttle unit.

Do I need to relearn or program anything after replacing the throttle body?
Yes. After replacement, an ETCS/throttle learn or idle learn is required so the ECU can calibrate the new sensor and motor positions. A proper scan tool makes this quick and avoids rough idle or limp mode.