Parts for your 1991 Toyota Hilux surf-Camshaft sensor

1991 Toyota Hilux Surf camshaft-sensor: is it actually used?

For the 1991 Toyota Hilux Surf, a separate, bolt-on camshaft-sensor isn’t used. Toyota’s engine control of that era takes the cam position signal from sensors built into the distributor (petrol) or inside the injection pump (diesel), not from a standalone sensor mounted on the cylinder head. So while the engine control unit absolutely needs a cam signal, there isn’t a distinct “camshaft position sensor” part to swap like on later models.

• 22R-E 2.4 petrol (EFI) and 3VZ-E 3.0 V6 petrol: cam (G) and engine speed (NE) signals come from the pick-ups inside the distributor.
• 2L-TE 2.4 turbo-diesel (EFI pump): the NE and G signals are generated within the injection pump assembly, not at the cam.

This design is confirmed by Toyota technical literature: the Toyota 4Runner/Hilux Surf Repair Manual (1989–1995, EFI sections for 22R‑E and 3VZ‑E) specifies NE and G signals within the distributor, the Toyota 2L‑TE Engine Repair Manual details NE/G sensors inside the pump, and the 1991 Electrical Wiring Diagram shows NE and G wiring from the distributor or pump to the ECU with no separate camshaft sensor. The Toyota Electronic Parts Catalogue for 1991 Hilux Surf engine codes likewise lists no standalone camshaft position sensor on these engines.

What should owners service instead? On the petrol models, keeping the distributor in top nick is the go: check shaft play, clean connectors, and replace cap/rotor and leads as needed. If there are hard starts, intermittent stalling, or a dead tach during cranking, test the NE/G signals at the ECU and inspect the distributor pick-ups. On the 2L‑TE, ensure the pump’s electrical connectors and grounds are clean and that timing belt alignment is spot on, internal timing sensors in the pump are specialist work. In all cases, correct base ignition/injection timing and timing-belt condition matter more than chasing a non-existent separate cam sensor.

If you’re shopping for a “1991 Toyota Hilux Surf camshaft-sensor”, it likely won’t match your vehicle. What you may need is distributor service or replacement (petrol), or diagnostic attention to the injection pump timing inputs (diesel).

Technical sources referenced (no external links provided): Toyota 4Runner/Hilux Surf Repair Manual (1989–1995) EFI sections for 22R‑E and 3VZ‑E, Toyota 2L‑TE Engine Repair Manual (Engine Control System), Toyota Electrical Wiring Diagram (1991 Hilux Surf/4Runner), Toyota Electronic Parts Catalogue for 1991 Hilux Surf engine families.

• Does a 1991 Hilux Surf have a separate camshaft position sensor?
  Not as a standalone part. The ECU’s cam signal (G) comes from the distributor on petrol engines and from inside the injection pump on the 2L‑TE diesel.
• What are the signs the cam/distributor signals are playing up?
  Hard starting, random stalling, no-start with a dead tacho whilst cranking, and an intermittent check engine light. A timing light that loses sync at idle can also point to weak NE/G signals.
• Can a later-model external cam sensor be retrofitted?
  It’s not a straightforward or worthwhile mod. The factory ECU expects NE/G signals from the original distributor or pump, retrofits would require custom triggers and standalone management.