Circuit Description

The PCM will compare the secondary current reading to predetermined maximum and minimum thresholds. If the secondary current signal pulse width is out of the predetermined range, the fail counter will be incriminated. If the fail counter exceeds the calibration, then the PCM is complete and a failure will be reported. If the sample counter threshold is reached before the failure threshold, then the PCM is complete and pass will be reported. PCM will detect an open/short circuit in the secondary current sense input circuit, misfire on the entire bank for the secondary current sense input circuit, coil failure, and same internal Ignition Current Sense System (ICSS) module faults.