This blog here will answer you this question: Which PTT Premium Tech Tool can diagnose Volvo B7R B9R B11R B12R bus? And which tool to use? Check professional answer as below: Some guys tested that Volvo PTT 2.04.87 diagnose Volvo B11R and B12R buses OK. Is that true? Yes. To diagnose Volvo Bus B7R, B9R, B11R and B12R bus you can use Volvo PTT 2.04.87 and newly released Volvo PTT 2.5.75! (Technicians from Autocardiag.com confirmed that) Volvo Tech Tool 2.05.75 What’s new? Special Login id and own Info Lasted Apci+ Update Volvo Trucks (Older electrical system, Vehicle electrical system ’98); Volvo Trucks (Version2, Version3 Parameter Programming); Volvo Trucks (Version4 FH4/FM4 Parameter Programming); Volvo Buses (Conventional, Multiplexed, Multiplexed V2, Multiplexed V3 [/b]); Volvo Construction Equipment Parameter Programming; Volvo Penta (Version2, Version3); Volvo OEM Component Customer (Version2, Version3); Mack Trucks (V-MAC I/II/III, ITC, IV, IV+) Parameter Programming); Renault Trucks (Version2, Version3, Version4) Parameter Programming; UD Trucks (Version2, Version3,Version4) Parameter Programming; Which tool can work with Volvo PTT 2.04.87 or Volvo PTT 2.5.75? Note: Both Volvo PTT 2.04.87 and Volvo PTT 2.5.75 software are tested 100% working with Volvo VOCOM and VCADS VOCOM. Volvo 88890300 VOCOM Interface VCADS Volvo 88890300 VOCOM