Parts for your 1999 Suzuki Jimny-Camshaft sensor

1999 Suzuki Jimny camshaft sensor: is it even there?

Short answer: a camshaft sensor isn’t used on the 1999 Suzuki Jimny with the 1.3‑litre G13BB engine. Factory documentation for the JB33/JB43 Jimny (G13BB) engine management shows a crankshaft position (CKP) sensor as the primary timing input and no camshaft position (CMP) sensor in the system. The wiring diagrams and diagnostic trouble code lists for the G13BB don’t include a CMP circuit or CMP‑related DTCs (like P0340/P0341). Trade data compilations (e.g., Autodata) and Suzuki workshop literature align with this: the G13BB Jimny is CKP‑only. Later Jimny models with the M13A engine (from mid‑2000s) added a cam sensor to enable sequential injection and variable valve timing—features the 1999 model doesn’t run.

Why doesn’t the 1999 Jimny need one? Its G13BB uses wasted‑spark ignition and batch (or semi‑batch) fuel injection, which don’t require the ECU to know which stroke each cylinder is on. With a clean signal from the crank sensor and a fixed trigger pattern, the ECU can time spark and fuel well enough for this simple, rugged setup. A cam sensor becomes essential when the ECU wants cylinder‑specific phasing (sequential injection) or to control cam phasing/VVT—neither applies to the 1999 Jimny.

Chasing a “cam sensor” fault on a 1999 Jimny? Under the bonnet you won’t find one. If a scan tool spits out a generic P0340 on this model, it’s usually a scan tool quirk, the wrong engine selected, or an engine swap. Real‑world faults that mimic “cam sensor” issues on a G13BB are typically CKP‑sensor or timing‑reference problems, such as:

• Tired or heat‑soaked crankshaft position sensor, especially when hot.
• Damaged wiring or a loose connector at the CKP near the front cover.
• Trigger wheel/reluctor issues or timing alignment problems.
• Weak coil pack, poor engine earths, or low system voltage causing misfires.

If a parts catalogue lists a camshaft sensor “for 1999 Jimny”, it’s likely referencing the later M13A engine, not the early G13BB. For proper servicing on the ’99, focus on the CKP sensor health, clean connectors, solid grounds, and correct base timing. That’s the lot—no cam sensor required.

Popular questions about the 1999 Suzuki Jimny camshaft sensor

Does a 1999 Suzuki Jimny have a camshaft sensor?
No. The G13BB‑equipped 1999 Jimny uses only a crankshaft position sensor. Suzuki’s workshop material for the JB33/JB43 G13BB shows no camshaft sensor in the wiring or DTC listings. Cam sensors appear on later M13A Jimnys that run sequential injection and VVT.

Why is my scan tool showing a camshaft sensor code on a 1999 Jimny?
Generic OBD tools sometimes map faults to “P0340” even when the vehicle doesn’t have a cam sensor. On a 1999 Jimny, look to the CKP sensor, its plug and wiring, or timing/reluctor issues. Also confirm you’ve selected the correct engine in the scan tool and that the vehicle hasn’t had an engine conversion.

Can a camshaft sensor be retrofitted to make the 1999 Jimny sequential injection?
Not practically. The stock ECU isn’t designed for a cam input or sequential injection. Retrofitting would require an aftermarket ECU, custom wiring, trigger strategy, and calibration work—well beyond routine servicing and rarely worth it on a stock G13BB.