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Parts for your 2002 Daihatsu Yrv-Throttle position sensors
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2002 Daihatsu YRV throttle position sensor (TPS): purpose and servicing
Technical sources including the Daihatsu YRV (M2# series, 2000–2005) workshop manual EFI section, Denso engine control wiring diagrams for the K3‑VE/K3‑VET, and the Daihatsu/Toyota EPC for YRV chassis M201/M211 all show a throttle position sensor mounted on the throttle body. So yes—on a 2002 Daihatsu YRV the throttle position sensor is fitted and relevant.
On a 2002 YRV, the TPS tells the engine control unit exactly how far the throttle plate is open. That signal helps the ECU decide fuelling, ignition timing, EGR/idle control, and, on autos, shift behaviour and kickdown. In day‑to‑day terms it smooths throttle response, keeps idle tidy, and stops the motor from bogging or surging when the driver dips the right foot.
The sensor itself is a small rotary potentiometer on the side of the throttle body. When healthy, it produces a clean sweep from a low closed‑throttle voltage to a higher wide‑open value. A crook or misadjusted TPS can make the YRV feel doughy off the line, hunt at idle, or throw the check‑engine lamp. Typical fault codes include P0120–P0124 and related correlation codes. Because it’s an electronic part rather than a consumable, there’s no fixed replacement interval—think of it as an “inspect and test” item during regular servicing.
- Signs it’s time to check the TPS: hesitations or flat spots, random stalling at lights, odd auto shift timing, poor fuel economy, or a check‑engine light.
- Quick driveway checks: confirm a snug, clean connector, no split vacuum hoses nearby, smooth, progressive throttle feel under the bonnet.
If replacement or adjustment is needed, it’s a straightforward job for a competent home mechanic:
- Disconnect the battery negative and remove the air intake duct for access.
- Unplug the TPS. If testing, back‑probe with ignition on: expect roughly 0.4–0.6 V closed throttle and around 4.0–4.5 V at wide open, with a smooth sweep in between.
- For cable‑throttle YRVs, the TPS usually mounts with slotted holes. Fit the new unit, then rotate slightly to set the closed‑throttle voltage in spec (often about 0.45–0.55 V). Lightly tighten the screws—no gorilla torque.
- Reconnect, clear fault codes, and perform an idle relearn by letting the engine reach operating temperature, then taking a short, gentle drive so the ECU trims settle.
During routine services (say every 40–60,000 km), it’s worth cleaning the throttle body bore and plate with proper intake cleaner (avoid soaking the TPS), inspecting loom routing, and ensuring the connector seal is intact. Sticking with a quality OE‑style sensor (Denso or genuine Daihatsu) keeps the YRV running sweet and avoids annoying drivability gremlins.
Does a 2002 Daihatsu YRV have a throttle position sensor?
Yes. The YRV’s EFI system (K3‑VE and K3‑VET) uses a TPS on the throttle body, as shown in the Daihatsu YRV workshop manual EFI diagrams and the Daihatsu/Toyota electronic parts catalogue for M201/M211 models.
What are common TPS symptoms on a YRV?
Hesitation, surging, rough idle, poor kickdown on autos, and a check‑engine lamp. Scan tools often show P0120–P0124 or related throttle correlation codes. If those turn up, test the TPS signal and wiring before replacing parts.
Do you need to calibrate the TPS after replacement?
On most 2002 cable‑throttle YRVs, yes—set the closed‑throttle voltage by rotating the sensor within its slotted mount, then clear codes and perform an idle relearn. If your variant is drive‑by‑wire, the ECU typically handles calibration automatically, but the 2002 models are commonly cable‑operated.
