As I repair ECUs I notice trends and would like your thoughts. Today topic is the internal Voltage Regulator in our ECU

  • LM/PM are generally good except a steel leg on the power resistor rusts out and the thus circuit stops working. Easy to replace or repair in the PM.
  • SMEC based on the LM/PM except the resistor is within the goo. I have not seen a fault in this yet.
  • SBEC/SBEC2 These use a new MOSFET rather than BJT. I feel these has higher incidence of failure due to under spec of said MOSFET.

What are you observations?