Parts for your 2002 Daihatsu Terios-Throttle position sensors

2002 Daihatsu Terios Throttle Position Sensor (TPS)

Yes, the 2002 Daihatsu Terios uses a throttle position sensor. This is documented in Daihatsu’s J1xx Terios workshop manual (EFI/Engine Control section), which shows a TPS mounted on the throttle body for both the HC-EJ and K3-VE fuel-injected engines. Daihatsu’s Electronic Parts Catalogue also lists a throttle position sensor (sometimes noted as “sensor, throttle position”) for this model year, with DENSO-supplied components common across markets. These technical sources confirm the TPS is fitted and is relevant to correct engine and transmission control on a 2002 Terios.

On the Terios, the TPS tells the engine control unit how far the throttle is open. That angle signal helps the ECU sort fuelling, ignition timing, idle control and deceleration fuel cut. If it’s an automatic, the transmission also uses throttle angle for shift timing and line pressure, so a crook TPS can make gear changes feel odd. Day to day, a healthy TPS means smoother take-offs, better economy and cleaner emissions.

While it’s not a routine “wear item”, the TPS and its connector are worth a look during regular servicing — especially if the vehicle sees dusty roads or plenty of stop–start driving around town. If replacement is needed, it’s a straightforward job: it sits on the side of the throttle body under the bonnet. Some units are slotted and require a basic adjustment, others are fixed. Always follow the workshop manual procedure and use a scan tool or multimeter to confirm the signal moves smoothly through the range without spikes or dead spots.

• Common signs it’s on the way out:
  • Erratic idle, hesitation or flat spots on acceleration
  • Poor kickdown on autos, harsh or late shifts
  • Higher-than-normal fuel use
  • Check Engine Light with TPS-related fault codes

• Simple service tips:
  • Inspect and clean the TPS connector, look for green crust, loose pins or brittle wiring
  • Clean the throttle body bore and plate (avoid spraying directly into the TPS)
  • If the sensor is adjustable, set it to spec per the manual and confirm with a scan reading
  • When replacing, use a quality part and new screws if the originals are chewed

Workshops in Australia and New Zealand typically check the TPS signal as part of drivability diagnostics. It’s a small piece that makes a big difference to how a Terios feels over the kilometres.

Popular questions about 2002 Daihatsu Terios throttle position sensors

Does a 2002 Terios actually have a TPS?
Yes. The Daihatsu J1xx Terios workshop manual (EFI section) shows a TPS on the throttle body, and the Daihatsu EPC lists the sensor for HC-EJ and K3-VE engines used in 2002. It’s a standard part of the fuel-injection system.

What symptoms point to a failing TPS on a Terios?
Typical clues are a lumpy or wandering idle, hesitation when tipping into the throttle, higher fuel use, and odd auto shifts. The Check Engine Light may appear with throttle-circuit fault codes. A scan tool graph that isn’t smooth as the pedal moves is another giveaway.

Can a TPS be cleaned, or should it be replaced?
The sensor itself is a sealed unit and isn’t serviceable. Clean the throttle body and the electrical connector, but don’t flood the TPS with cleaner. If the signal has dead spots or won’t calibrate within spec, replacement is the reliable fix.