Parts for your 1992 Mitsubishi Pajero-Throttle position sensors

1992 Mitsubishi Pajero throttle position sensor (TPS)

Yes, the 1992 Mitsubishi Pajero uses a throttle position sensor. This applies to the petrol EFI models (such as the 6G72 V6) where the TPS is mounted on the throttle body, and to many diesel variants (like the 4D56) where a position sensor is fitted to the injection pump throttle lever to inform the engine control of load for EGR and timing functions. This fitment is documented in Mitsubishi’s Pajero/Montero Factory Service Manual for the 1991–1999 models (engine electrical/fuel injection sections), the 4D56/4M40 diesel engine workshop manuals (pump-mounted position sensor description), and the Mitsubishi ASA electronic parts catalogue, all of which show a TPS/position sensor for these engines.

The TPS on a 1992 Pajero tells the ECU exactly how far the driver has opened the throttle. On petrol models, that means crisp fuelling, smoother idle control, better spark timing, and, on autos, tidier shift timing. On diesels with a mechanical pump, the position sensor doesn’t meter fuel directly but gives the control unit a heads-up on driver demand so it can manage EGR and timing strategies to keep it running clean and willing.

As part of regular servicing, it’s smart to give the TPS a quick once-over. It’s not a routine replacement item, but age, heat and vibration can make the sensor track wear or the connector go crusty.

• Typical signs of a crook TPS: erratic idle, flat spots on take-off, surging, higher fuel use, lazy or harsh shifts on autos, and a stored fault code on petrol ECUs.
• Basic checks: inspect the plug and loom under the bonnet for oil or corrosion, make sure the sensor mount screws are snug, and confirm the throttle cable isn’t too tight.
• Testing/calibration: with a multimeter or suitable scan tool, verify smooth voltage change from closed to wide-open throttle and set base position to factory spec (closed-throttle is typically around the half-volt mark, but always follow the workshop manual for the exact figure).

Replacement is straightforward. Disconnect the battery, unplug the sensor, mark its current position, remove the small fixings, and swap it over. Refit loosely, rotate to align the tang, then nip the screws and perform the closed-throttle adjustment. Clear stored codes on petrol models and take it for a spin to confirm clean throttle response. On diesel pump-mounted sensors, access is tighter, so patience (and small hands) helps.

Technical sources: Mitsubishi Pajero/Montero Factory Service Manual (1991–1999), Mitsubishi 4D56/4M40 Diesel Engine Workshop Manuals, Mitsubishi ASA Electronic Parts Catalogue.

Does a 1992 Mitsubishi Pajero definitely have a TPS?

For petrol EFI models, yes—there’s a TPS on the throttle body. Many diesel models of this era also have a position sensor on the injection pump throttle lever to inform EGR and timing control. Factory service literature and the Mitsubishi parts catalogue list these sensors by engine and market.

What symptoms point to a failing TPS on a 1992 Pajero?

Common giveaways include uneven idle, hesitation off the line, surging at a steady cruise, poor fuel economy, and harsh or oddly timed shifts on automatic transmissions. Petrol models may log a fault code and illuminate the warning lamp. Intermittent faults often trace back to a dirty connector rather than the sensor itself.

Can the TPS be cleaned, or should it be replaced?

The connector can be cleaned and the mounting position re-set. If the sensor track is worn (voltage jumps or dead spots while the throttle is moved), replacement is the fix. Because adjustment matters, follow the workshop spec and use a multimeter or scan tool to set it correctly after fitting.