Parts for your 1987 Suzuki Jimny-Crank angle sensor

1987 Suzuki Jimny crank-angle-sensor — is it actually fitted?

For the 1987 Suzuki Jimny (also sold as the SJ413/Sierra in Australia and New Zealand), a crank-angle-sensor isn’t used. Period technical literature shows these models ran a carburetted F10A 1.0 or G13A 1.3 engine with a conventional distributor and an ignition pickup coil inside the distributor body, rather than a separate crank-angle-sensor and ECU. See: Suzuki SJ413/Samurai Factory Service Manual, Ignition System section (mid-1980s editions), Gregory’s/Max Ellery repair manuals for Suzuki Sierra 1982–1994, and Suzuki Parts Catalogues for SJ/Sierra of the era. Those documents describe a breakerless distributor with a reluctor/pulse generator and mechanical/vacuum advance, and make no provision for a standalone crank-angle-sensor.

Why no crank-angle-sensor on a ’87 Jimny? The ignition is distributor-based, not ECU-controlled. Timing is set by the distributor and advanced by mechanical weights and a vacuum diaphragm. The pickup coil in the distributor provides a basic engine-speed/trigger signal to the ignitor module to fire the coil, but there’s no need for a high-resolution crank position input because there’s no fuel injection computer or coil-on-plug system to feed. This is exactly how most small carb’d Suzukis of the time were engineered, and it’s backed by the factory ignition diagrams and test procedures in the SJ413/Sierra FSM.

It’s worth noting that some early-1990s EFI variants (G13BA) introduced a distributor-mounted crank/cam angle signal for the ECU. That’s a different setup from the 1987 carb models. If a vehicle’s been engine-swapped or converted to EFI, it may use a crank trigger or a distributor-integrated sensor, but that’s not original to a 1987 Jimny.

• What to service instead: check distributor shaft play, set base timing with a timing light, inspect the pickup coil resistance, confirm the reluctor air gap, and ensure the vacuum advance holds vacuum and moves the plate smoothly.
• Common drivability clues: hard starting, random misfire, or timing scatter usually point to a tired distributor bearing, failed pickup coil, cracked cap/rotor, or perished vacuum lines—rather than any crank-angle-sensor fault.
• Parts naming quirks: suppliers may list a “crank angle sensor” for later EFI Jimnys, for a 1987, the correct item is the distributor pickup coil/ignition pulse generator.

FAQs

Does a 1987 Suzuki Jimny have a crank-angle-sensor?
No. The ’87 Jimny/Sierra uses a conventional distributor with a magnetic pickup coil and mechanical/vacuum advance. There’s no standalone crank-angle-sensor or ECU in the factory carburetted setup.

Where does the engine get its timing signal on a 1987 Jimny?
From the pickup coil inside the distributor. The reluctor wheel and pickup generate a pulse that the ignitor uses to switch the ignition coil. Base timing is set by rotating the distributor and is further adjusted by the mechanical weights and vacuum diaphragm.

Can a crank-angle-sensor be added to a 1987 Jimny?
Yes, but only as part of an EFI or aftermarket ECU conversion. That typically involves a crank trigger wheel and sensor or a distributor with an internal angle sensor suited to the chosen ECU. It’s not a simple drop-in for a stock carburetted ignition.