Parts for your 1992 Mitsubishi Pajero-Camshaft sensor

1992 Mitsubishi Pajero camshaft sensor — is it used, and what to know

Based on factory literature and parts catalogues, whether a camshaft sensor is relevant on a 1992 Mitsubishi Pajero depends on the engine fitted. Technical sources referenced include the Mitsubishi Pajero/Montero 1991–1996 Workshop Manual (Engine Electrical/IGN sections), Mitsubishi 6G7x Petrol Engine Service Manual, Mitsubishi 4D56 Diesel Engine Service Manual (Fuel Injection Equipment), and the Mitsubishi ASA/CAPS electronic parts catalogue for 1992 Pajero models.

• Petrol V6 (6G72 3.0): Yes, a camshaft-sensor function is used. It’s integrated inside the distributor as an optical/Hall “crank/cam angle sensor” that the ECU uses for timing.
• Diesel (4D56 2.5): No separate camshaft sensor is used. This engine runs a mechanically governed injection pump with no ECU control in 1992, so a CMP sensor isn’t required.

Why the diesel doesn’t use one: The 1992 4D56 Pajero relies on fixed mechanical timing (timing belt, cam sprocket, and pump sprocket alignment) and a mechanical VE-type injection pump. With fuelling and timing not commanded by an ECU, there’s no need for a camshaft position input, which matches the diesel workshop manual’s descriptions.

If the vehicle is the 3.0-litre petrol V6, the camshaft-sensor role is absolutely in play. On these models, the “cam” signal is provided by the angle sensor inside the distributor. Its job is to tell the ECU exactly where the cam/distributor is, so the ECU can fire the coils and injectors at the right moment. When this sensor gets flaky, owners often see hard starts (especially hot), random stalling, misfires, rough idle, and the odd no-start. A scan of the OBD1 system or fault code blink test can help confirm the issue.

It’s not a routine replacement item, but as the car clocks up the kilometres, it pays to keep the distributor cap, rotor, and wiring tidy and dry, and to replace the timing belt on schedule. Oil ingress or dust inside the distributor can upset the optical window, if it’s just dirty, a gentle clean can help, but cracked discs or weak sensors call for replacement.

When replacing, disconnect the battery, mark the distributor housing relative to the head, and avoid moving the rotor once the cap is off. Many workshops replace the entire distributor assembly because it’s quicker and reliably restores the internal sensor. If you’re fitting just the sensor/module, handle the trigger disc carefully. After refitting, set base ignition timing with a timing light following the workshop manual procedure (using the timing set connector) and verify idle quality and throttle response. Quality parts matter here, cheap units can cause intermittent faults that’ll drive anyone around the bend.

Technical references consulted: Mitsubishi Pajero/Montero 1991–1996 Workshop Manual (Ignition/Engine Electrical), Mitsubishi 6G7x Engine Manual (distributor angle sensor description), Mitsubishi 4D56 Diesel Engine Manual (mechanical injection system), and Mitsubishi ASA/CAPS EPC entries for 1992 Pajero distributor assemblies.

• Where is the camshaft sensor on a 1992 Pajero?
• What are the tell-tale signs the camshaft sensor is failing?
• Can a faulty camshaft sensor be cleaned, or is replacement the go?

Where is the camshaft sensor on a 1992 Pajero?
On the 3.0 V6 petrol, it’s built into the distributor — the angle sensor under the cap and rotor. There isn’t a separate sensor on the cam cover. On the 2.5 diesel (4D56), there isn’t a camshaft sensor at all.

What are the tell-tale signs the camshaft sensor is failing?
Intermittent no-start, sudden stalling, rough idle, misfires, and poor fuel economy are common. The tach can behave erratically, and an OBD1 fault code may be stored. Heat soak issues are typical — it dies hot, then fires up again once cooled.

Can a faulty camshaft sensor be cleaned, or is replacement the go?
If contamination is the culprit, a careful clean inside the distributor can buy time. But if the optical disc is cracked, the pick-up is weak, or wiring is brittle, replacement (often the full distributor) is the reliable fix.