When the transistor interrupts current flow, the resulting inductive voltage crosses the zener to provide a confirmation pulse of coil firing to the microprocessor. The voltage kick within the primary pattern is relevant to the PCM on-board diagnostics.Ī zener diode placed in parallel to the PCM internal switching electronics is rated at a specific zener voltage. While connecting a scope to the ignition primary, an attenuator may be necessary to protect the scope from high voltage inductive kick. Primary ignition waveforms can be accessed at each individual coil or at the PCM, whichever is easier. These repair solutions will cover more than six-million vehicles on the road today.ĭavid Hirschhorn, Director of Brand Management In a 45-minute webinar sponsored by CRP Automotive, the company that brings you Rein Automotive, we will cover six common cooling system repairs on BMW, Audi and VW vehicles. These solutions can simplify a repair and protect against future failures.
These parts can create a win/win situation for your shop and customers when dealing with today’s vehicle’s complexity and longevity. Some replacement parts can be better than the original parts. It could be hoses, plastic couplings or water pumps.
Have you ever noticed many European cars and SUVs no longer have coolant replacement intervals listed in the service information? This could be due to cooling systems requiring service or component replacement prior to that interval. Sponsored By CRP Automotive, the company that brings you REIN Automotive