Video: Testing a coil-on-plug system 0 By autotech-nic on November 25, 2015 Article How to test a 4-wire coil on plug (COP) ignition system on a Toyota Yaris (Duration 7mins) Tags: Coil-on-plug, Ignition test, PicoScope Share. Twitter Facebook Pinterest LinkedIn Tumblr Email About Author autotech-nic Related Posts February 22, 2021 0 New car focus: two models introduce hybrid tech on a budget February 16, 2021 0 Brakes – Past, present and future February 8, 2021 0 4-Focus – new tech innovations from Volkswagen, Skoda, Hyundai and BMW Leave A Reply Cancel ReplyYou must be logged in to post a comment.