Parts for your 1991 Suzuki Jimny-Camshaft sensor

1991 Suzuki Jimny camshaft sensor – is it actually a thing?

Short answer: for a 1991 Suzuki Jimny (known as Sierra in Aus/NZ), a standalone camshaft position sensor isn’t fitted or required. Factory literature for the SJ413/Sierra of this era specifies a distributor-based ignition system, not a cam sensor–equipped, distributorless setup. That’s confirmed by the Suzuki Sierra SJ413 Factory Service Manual (Engine Electrical: Distributor ignition), the Suzuki Electronic Parts Catalogue for Group 15 (Engine Electrical) listing a pick-up coil and igniter but no camshaft position sensor, and well-known references like Gregory’s Manual No. 512 (Suzuki Sierra 1982–1997) and Autodata ignition diagrams of the period—all of which show no discrete camshaft position sensor.

Why? The 1.3-litre G13 carburetted engines used in most 1991 Jimny/Sierra models across Australia and New Zealand rely on a conventional distributor with a pick-up coil for timing. The engine management of the day didn’t need a separate cam sync input because there wasn’t a multi-point EFI, coil-on-plug, or sequential injection strategy to drive. Timing and triggering come from the distributor signal, which turns at camshaft speed, so there’s no separate sensor on the cam or in the cylinder head to replace or maintain.

One caveat for the trainspotters: certain Japanese domestic market Jimny JA11 variants around 1990–1995 ran EFI with a distributor-mounted crank angle sensor. Even there, the sensor is integrated into the distributor housing, not a separate, head-mounted camshaft position sensor. Suzuki’s JA11 service material labels this as a crank/cam angle signal within the distributor assembly, not a standalone cam sensor.

If you’re chasing faults that a modern car might blame on a “cam sensor,” the Jimny/Sierra of this year typically needs attention elsewhere. Common checks include:

• Distributor pick-up coil and ignition module (igniter)
• Distributor cap, rotor and HT leads
• Base timing and timing belt alignment
• Carburettor fuel delivery and vacuum leaks
• Grounds and engine loom connectors

So, if someone’s trying to sell a camshaft sensor for a 1991 Jimny/Sierra, it’s not the right part for these local-spec vehicles. Focus on the distributor and associated ignition components for reliable starts and smooth running.

FAQs

Does a 1991 Suzuki Jimny/Sierra have a camshaft position sensor?
No. Aus/NZ 1991 models use a distributor-based ignition without a standalone camshaft position sensor. Timing input comes from the distributor pick-up coil. Technical sources: Suzuki Sierra SJ413 Factory Service Manual, Suzuki EPC (no CMP listing), Gregory’s 512, and Autodata ignition diagrams.

Where would a cam sensor be if mine’s a JDM import?
On some Japanese JA11 EFI variants, the timing sensor is inside the distributor (often called a crank angle or cam angle sensor in the distributor). It’s not a separate sensor on the cam cover. If your import has EFI and a different distributor, inspect inside the distributor body rather than searching the cylinder head.

What should be checked instead of a cam sensor on a 1991 Jimny?
Start with the distributor pick-up coil and the igniter, then the cap, rotor and leads. Confirm base ignition timing and that the timing belt hasn’t jumped a tooth. Also check carb tune, fuel supply, and any dodgy earths or connectors—these are far more likely to cause misfires or no-starts on this model.