Bosch KTS 301

Bosch Diagnostics / Bosch KTS diagnostic testers

A 1991 Porsche 944 workshop manual identifies Porsche Systemtester 9288 as Bosch KTS 301. It is part of the early Hammer family and used Porsche-specific software modules and vehicle connections.

The names KTS 300, KTS 301 and 9288 are sometimes used loosely for related equipment. Record the exact label and software cartridge; the model designation alone does not establish which Porsche systems a particular unit can test.

Photographs and screenshots

• Porsche RJ illustrated 9288, PST2 and PIWIS history

Related pages

• Bosch KTS 300
• Porsche 9288 and System Tester 1

Sources

Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.

• 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.
• 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.