Identification and evidence
Bosch diagnostic bulletin 1 689 989 015 identifies MP5.4 on the Toyota Avensis AT220 1.6i 4AFE, October 1997 to July 2000. Bosch warns that on this specified application high voltage may be present at the diagnostic connector with the engine running and can damage the listed KTS testers; follow its adapter and connection instructions.
Identification and scope
Retain the complete ECU designation, Bosch and vehicle-manufacturer part numbers, engine, vehicle year and market, hardware and software identity. Similar names do not establish shared pin assignments, calibration files or programming procedures. Examples above are source-scoped and are not a complete fitment list.
Source accessed 10 November 2026.