Road Service Diagnostic Evaluation Process

Equipment users/fleets expect to be able to return a down unit to service in a timely manner without purchasing unneeded components, paying for wasted labor, or risking another related equipment failure due to inaccurate/incomplete troubleshooting. Road service providers want to provide accurate, competent, and timely repairs at a fair price. They strive for repeat business based on prior customer satisfaction and original equipment manufacturer (OEM) approval of proper warranty repairs and component replacements.
May 15, 2026

Vehicle technology is rapidly evolving and becoming more complex. However, the primary vehicle starting and charging electrical system has remained basically the same, with some updates in components. However, equipment users/fleets often experience frustration with the process of repairing electrical system related breakdowns at roadside. Based on this, ATA’s Technology & Maintenance Council (TMC) has developed RP 169A for systematically conducting a proper roadside diagnostic evaluation of the primary electrical system during a road service call. Whether you do the work yourself or outsource it to a third-party provider, this TMC recommended practice will help minimize downtime and standardize your diagnostic efforts when roadside breakdowns occur. It is just one of more than 500 RPs Council members have access to when they join TMC. Act now, and join TMC this year for half price when you respond to this invitation (full, associate & service provider executive/corporate level members only). Can you afford not to be a member of TMC?