PCM (ECM/TCM): EMS No Request
While the ignition switch is ON, the PCM/ECM receives information from the IBU (IMMOBILIZER + BCM + TPMS) and permits fuel injection by confirming that the CODE memorized in the PCM/ECM coincides with the one in the IBU (IMMOBILIZER + BCM + TPMS).
Once the ID code from a transponder is verified by the IBU (IMMOBILIZER + BCM + TPMS) and registered, an answer signal will be sent to the PCM/ECM. The IBU (IMMOBILIZER + BCM + TPMS) then sends a START or NO START signal to the PCM/ECM.