As activated by power supply, ECM receives signals from several sensors such as Crank Position Sensor, Acceleration Position Sensor. ECM controls engine as actuating injectors, various solenoids and relays by comparing sensor signals with CONTROL LOGIC of micro controller and EEPROM.
For reliability of control, ECM performs SELF TEST and diagnoses several sensors and actuators. If serious errors which have influence on driving performance, ECM notifies drivers and mechanics of malfunction informations. ECM can shut system down to prevent the system from dangerous situation by miss controls.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Software monitoring | ● ECM component failure | ||
Enable Conditions | ● Ignition "ON" | |||
Threshold Value | ● Sofrware inside of ECM operation error - Immediately, RESET YES ● Software relavant to injector operation error - VGT : 1.04sec, M/T : 1.02sec ● Communication error between micro controller and output transistor - Immediately | |||
Diagnostic Time | ● Refer to Threshold Value | |||
Fail Safe | Fuel Cut | YES | ||
EGR Off | NO | |||
Fuel Limit | YES | |||
MIL | NO | |||
