AUTOMOTIVE ELECTRONIC CIRCUIT ANALYZER

摘要

An automotive electronic circuit analyzer that plugs into an automobile's electronic control module connector slot in place of the electronic control module, is disclosed, comprising positive and negative load sensing cells each having a series resistor coupled to an ECM load positive load via the ECM connector and having an LED transistor for conducting current when the ratio between the load and the series resistor exceeds a predetermined value. A regulated power circuit for sinking current from the positive load sensing cells and for supplying current to the negative load sensing cells, includes a timing circuit for controlling the active power pulse width so that the LEDs are illuminated with high frequency, short duration power pulses to indicate a shorted load.