Parts for your 1996 Daihatsu Gran move-Throttle position sensors

1996 Daihatsu Gran Move throttle-position sensor (TPS)

Yes, the 1996 Daihatsu Gran Move is fitted with a throttle-position sensor. Technical references backing this include Daihatsu factory service information for the G3-series Pyzar/Gran Move EFI system (which shows TPS signal lines VTA, IDL and E2 on the engine wiring diagram), as well as the Daihatsu electronic parts catalogue listing a TPS on the throttle body for the HC/HD-series EFI engines used in this model. Aftermarket parts catalogues for AU/NZ also list a direct-fit TPS for the 1996 Gran Move 1.5, further confirming its use.

On this Gran Move, the TPS tells the ECU exactly how far the throttle is open, so the engine can adjust fuelling, ignition timing and decel fuel-cut smoothly. It sharpens tip-in response when taking off, steadies the idle by flagging a fully closed throttle, and helps avoid flat spots when rolling on the throttle. On automatic versions, the TPS signal is also used by the transmission control to tidy up shift timing and kick-down behaviour.

There’s no set replacement interval for a TPS, but it’s smart to check it during regular servicing, say every 40–60,000 kilometres. Common signs it’s on the way out include hesitation, a dead spot on light throttle, hunting idle, sudden surging, harsh shifts on autos, or a check-engine light with throttle-related codes (such as P0120–P0123 on OBD-II vehicles). Also keep an eye on the connector for green corrosion and brittle wiring near the plug.

Basic checks can be done with a multimeter: you’re looking for a smooth voltage sweep from roughly 0.4–0.7 V closed-throttle to about 3.7–4.5 V at wide open, with no dropouts. Many Denso/Daihatsu units also have an idle switch (IDL) that should show continuity only at fully closed throttle. Specs can vary slightly by engine, so confirm against factory data when available.

If replacement is needed, it’s a straightforward bolt-on job. Mark the original sensor’s position, swap it over, and lightly preload/rotate the new sensor so the idle switch closes at rest without forcing the throttle plate open. Tighten the screws gently (they’re small), reconnect the plug, then perform a throttle/ECU relearn by idling the engine up to temperature without loads. Avoid turning the throttle stop screw, and don’t drown the sensor in solvent if cleaning the throttle body—spray sparingly and keep the TPS dry.

• Preventative tips: keep the throttle body clean, ensure the cable isn’t too tight, and secure the harness to avoid vibration damage.

Popular questions about 1996 Daihatsu Gran Move TPS

Where is the TPS on a 1996 Gran Move?
It’s mounted on the side of the throttle body, opposite the throttle cable lever. You’ll see a small, black plastic sensor with a 3- or 4-pin connector. It’s driven by the throttle shaft.

Do I need to calibrate the TPS after fitting?
Many Gran Move TPS units are slotted for minor adjustment. Set it so the idle switch closes at fully shut throttle and the output voltage sits around the lower spec at idle. After installation, clear fault codes and let the ECU relearn by idling to operating temp before driving.

What symptoms point to a failing TPS on this model?
Expect a flat spot on light throttle, intermittent surging, rough or high idle, poor fuel economy, and on autos, odd or harsh shifts. A stored throttle circuit code is common. Testing the voltage sweep usually confirms it.