Bosch Diagnostics / Bosch KTS diagnostic testers
Bosch dates the KTS 500 to 1997. The portable system tester brought an integrated display, navigation keys and diagnostic and electrical measurement functions to the workshop. Exact capabilities depend on the installed interface, software and accessories.
Porsche System Tester 2 (PST2) used the KTS 500 computer platform with Porsche-specific software. A Bosch-labelled KTS 500 running Porsche software is a separate configuration; the case and the program displayed do not on their own establish whether it is an original Porsche-supplied tester.
A separate PC installation could use a KTS 500 diagnostic board; this is documented on the ISA-interface page.
Photographs and screenshots


- Porsche RJ photograph of PST2
- Owner photographs of a green KTS 500 running Porsche diagnostic software
- Porsche and Bosch tester history with photographs
Related pages
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Bosch KTS 560/590 press information and KTS milestones. Bosch press information; timeline in French. 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.
- ESI[tronic] installation manual: KTS 500 PC board and ISA requirements. Bosch installation manual, Portuguese edition hosted by Manualzz. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.