Engine Control relay
Engine Control relay
The purpose of the System Voltage is to detect an excessively low or high system voltage that may be caused by a malfunctioning charging system.
System Voltage is the ignition voltage potential at the Powertrain Control Module (ECM)
ECM measures and compares voltage from ignition key and each relay. With this mechanism, ECM knows if the Engine Control relay switch turns on after Turn the ignition switch "ON" or if turns OFF after Turn the ignition switch "OFF".
Engine Control relay is located in PCB BLOCK of junction box.