Parts for your 1999 Suzuki Jimny-Crank angle sensor

1999 Suzuki Jimny crank angle sensor — what it does and how to look after it

Yes, the 1999 Suzuki Jimny uses a crank angle sensor (often listed as a crankshaft position sensor). This is confirmed in the Suzuki Jimny JB33/JB43 factory service manual (Engine Control/ECM section, 1998–2001 printing), in Autodata engine management references for the G13BB/K6A engines, and in OEM parts catalogues that list a crankshaft position sensor for the 1998–2004 Jimny. On the G13BB 1.3-litre, the sensor reads a toothed wheel on the crank (commonly at the bellhousing or front cover depending on market), while the K6A mini-vehicle variant mounts it at the timing cover.

This little sensor is the ECU’s timing compass. It tracks crank speed and exact crank position so the ECU can fire the coils and injectors at the right moment, control idle, and run diagnostics. Without a clean signal, the Jimny can be hard to start, stumble, misfire, or cut out once warm. It’ll usually log a fault like P0335 and light the check engine lamp.

It’s not a scheduled service item, but it absolutely benefits from attention during routine servicing. Heat, oil weeps under the bonnet, and stray metal filings can upset the signal. During a service, it’s smart to:

• Visually check the sensor body and plug for oil contamination or corrosion.
• Inspect the wiring loom for chafing near the bellhousing/front cover.
• Make sure the connector fits snugly and the terminals aren’t green or loose.
• If accessible, wipe away metallic debris from the sensor tip. Don’t pry at it.

If the Jimny is showing intermittent stalling, crank-no-start when hot, or random misfires, the sensor and its wiring deserve a look first. A scan tool live-data check (RPM during cranking) or an oscilloscope trace is the tidy way to confirm a weak or missing signal before replacing parts.

Replacement is straightforward with basic spanners: disconnect the battery, locate the sensor (G13BB: typically near the gearbox bellhousing or lower block, K6A: front timing cover), unplug, remove the retaining bolt, swap in the new unit, and route the loom away from the exhaust. There’s no adjustment on these sensors, so it’s bolt-in-and-go. Use a quality OEM-equivalent sensor and a fresh O-ring if specified to keep oil out. After fitting, clear any codes and road test. If faults persist, check the trigger wheel for damage and confirm good earths and 5 V reference at the plug.

Look after the crank angle sensor and the Jimny’s trusty 1.3 will keep pulling happily through the kays—on- or off-road.

• Typical symptoms when it’s failing: hard starting, no tach movement while cranking, random stalling when hot, misfires, poor fuel economy, and a CEL with P0335-type codes.
• Good practice: fix any oil leaks above the sensor and keep the loom clipped and supported.

FAQ

Where is the crank angle sensor on a 1999 Jimny?
On most Aussie/NZ G13BB models it’s mounted low on the engine, reading a toothed wheel at the rear of the crank near the bellhousing. Some variants place it at the front timing cover. If you can’t spot it, trace the two- or three-pin plug from the lower engine harness around the gearbox area.

This location keeps the sensor close to the trigger wheel but makes it a bit fiddly to reach, so a small ratchet and good lighting help.

Can a dirty crank sensor be cleaned, or does it need replacing?
If it’s only got light oily grime or metallic fuzz, a gentle wipe can restore a clean signal. Avoid harsh solvents on plastic bodies. If the sensor has internal fault codes, cracked insulation, or heat-soak failure, replacement is the reliable fix.

Always check the connector and wiring first—many “bad sensors” are actually a dodgy plug or damaged loom.

Is it safe to keep driving with a failing crank angle sensor?
It might run poorly today and fail to start tomorrow. Because the ECU relies on that signal for spark and fuel timing, a failing unit can leave the Jimny stranded.

Best to diagnose early and sort it—especially if planning a long trip or heading off-road where a tow is a hassle.