Porsche RJ describes the 9288 as a Porsche-specific Bosch KTS 300 derivative introduced around 1989, with Porsche diagnostic software in replaceable cartridges and a Porsche-specific 19-pin connector. It is often called the Hammer or System Tester 1.
The earlier Porsche 9268 was a separate fault-code reader. Later coverage depends on the cartridge, cable, model and control unit; do not infer complete vehicle coverage from the housing alone.
Photographs and screenshots
Related pages
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Porsche RJ: evolution of Porsche diagnostic systems. Porsche RJ; Portuguese, illustrated history. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.
- Porsche diagnostic tester history: 9268 through PIWIS. Callas Rennsport, 2011. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.
- Porsche 944 workshop manual: Systemtester 9288 / Bosch KTS 301. Porsche workshop manual, 1991; hosted by Manualzz. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.