Parts for your 1990 Suzuki Jimny-Crank angle sensor

1990 Suzuki Jimny crank‑angle sensor — is it actually fitted?

Short answer for Aussie and Kiwi owners: on the locally delivered 1990 Suzuki Jimny/Sierra (SJ413, 1.3‑litre carb model), there isn’t a separate crank‑angle sensor. The factory Suzuki Sierra/Jimny SJ413 service manual for this era specifies an electronic distributor with a pickup coil and igniter providing the timing signal, and the Suzuki Electronic Parts Catalogue for AU/NZ lists a distributor assembly but no standalone crankshaft position or crank‑angle sensor. For reference, see the Suzuki SJ413 Service Manual (often cited as P/N 99500‑81A10‑01E or similar editions) and the Suzuki EPC for SJ70/SJ73/SJ413.

Why it’s not used on these models: the 1990 AU/NZ Jimny/Sierra runs a carburettor and a distributor with mechanical and vacuum advance. There’s no engine control unit demanding a high‑resolution crank reference, so a dedicated crank‑angle sensor isn’t required. The distributor’s internal pickup coil (sometimes called a signal generator) triggers the ignition, and timing is adjusted mechanically and via vacuum, not by software.

There is one common exception owners bump into, especially in NZ: Japanese‑market 1990 Jimny JA11 variants with electronic fuel injection. Those run a distributor‑mounted crank‑angle sensor (an optical or reluctor setup inside the distributor) that feeds the ECU. If the vehicle is a grey import JA11 with EFI, a crank‑angle sensor is relevant. You’ll spot EFI by the throttle‑body injection hardware, an ECU under the dash, and a multi‑pin square connector at the distributor.

For AU/NZ carb models, there’s nothing to replace on the crank snout or bellhousing because there is no sensor there. Instead, good servicing focuses on the distributor and related ignition bits:

• Renew distributor cap and rotor, and keep leads and plugs in good nick.
• Check the vacuum advance diaphragm and base timing with a timing light (per the under‑bonnet sticker or service manual spec).
• Inspect the distributor pickup coil wiring for cracks and measure resistance per the manual if you’re chasing a no‑spark.
• Ensure solid engine and body earths, dodgy grounds mimic sensor faults.

If you’re diagnosing a rough idle, misfire, or no‑start on a carb 1990 Jimny, think cap/rotor, pickup coil, igniter, coil and wiring first. Don’t spend hours hunting a crank sensor on the block — it isn’t there on the local carb models. For Japanese‑import JA11 EFI vehicles, a failing distributor CAS can cause intermittent no‑start, tach dropouts and backfiring, testing is done at the distributor connector per the JA11 workshop manual.

Popular questions

Does my 1990 Suzuki Jimny/Sierra in Australia or New Zealand have a crank‑angle sensor?
Most locally delivered carb models do not have a standalone crank‑angle sensor. Ignition timing is triggered by the distributor’s internal pickup coil and handled with mechanical/vacuum advance, as outlined in the Suzuki SJ413 service manual and the AU/NZ EPC.

How can I tell if my 1990 Jimny (especially a Japanese import) actually has a CAS?
If it’s a JA11 EFI vehicle, it will have an ECU, throttle‑body injection and a multi‑pin distributor connector. Those models use a distributor‑integrated crank‑angle sensor for the ECU. Carb models with a simple two‑wire pickup and no ECU don’t have a CAS as a separate service part.

What faults mimic a bad crank‑angle sensor on a carb 1990 Jimny?
No‑spark or random misfire is more likely the distributor pickup coil, igniter, cap/rotor, ignition coil, poor grounds or tired leads/plugs. Follow the service manual tests for pickup coil resistance and igniter checks, and verify base timing with a timing light.