Circuit Description
NOTE:
To locate components, see COMPONENT LOCATIONS . For circuit reference, see WIRING DIAGRAMS . For connector terminal identification, see CONNECTOR IDENTIFICATION . If testing requires component removal or replacement, see appropriate REMOVAL & INSTALLATION article.
The Power Control Module (PCM) checks the validity of the signals used in the ION Sensing module various engine operating conditions. This test will return a fault if the cylinder synchronization routine has not been completed after a predetermined number of events after crank. This test will detect fault that will prevent the PCM from synchronization, such as Knock Signal (KI) - Combustion Quality (CQ) lines being swapped, shorted spark plugs, ION Sensing module faults, an PCM hardware faults.