5.
Are any DTCs recorded ?
▶ Go to the DTC guide of recorded NO. in Scantool.
▶ System operates within specification.
ECM is activated by power supply. Signals from several sensors, such as CKPS and APS, is inputted to ECM. Comparing inputted siganals with control LOGIC saved at micro controller and EEPROM, ECM controlls engine as actuating injectors, solenoids and relays. To guarantee accurate control, ECM performs SELF TEST, DIAGNOSIS of several sensors and actuators. And if serious trouble which affects vehicle performance occurrs, ECM sets DTCs.At certain cases, ECM shuts down whole systems in order to prevent dangerous situation due to incorrect control.
P1145 will be set when Fuel Cut is not performed , that is ECM still controls fuel injection through the injector although accelerator pedal is off or actual Engine RPM is higher than 320RPM which is target RPM controlled by ECM for more than 0.8sec. In this case, Drive stage for injectors in ECM is failure to controlling the Power supply cut.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Software monitoring | ● ECM internal error | ||
Enable Conditions | ● Engine running | |||
Threshold Value | ● Overrun lasts for seconds. (fuel injection performed regardless with driver's intension) ● Actual Engine RPM is higher than 320 RPM which is target RPM controlled by ECM. - 0.8 sec | |||
Diagnostic Time | ● Immediately | |||
Fail Safe | Fuel cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
ECM Component Inspection
IG KEY "OFF", ENGINE "OFF".
Disconnect ECM.
Replace ECM, check if abnormal operations disappear.
If problems are corrected, replace ECM.
Input injector IQA data(7 letters) using scantool at replacing ECM.
Enter the driving distance - how many km the CPF is used- into New ECM with scanner.
For immobilizer applied vehicle, input pin code.
After a repair, it is essential to verify that the fault is corrected.
After connecting Scantool select "DIAGNOSTIC TROUBLE CODES(DTCs)" mode.
Clear recorded DTC using Scantool.
Drive the vehicle within DTC "Enable conditions" in "General information".
After selecting "DIAGNOSTIC TROUBLE CODES(DTCs)" mode and check if DTC is recorded again.
Are any DTCs recorded ?
▶ Go to the DTC guide of recorded NO. in Scantool.
▶ System operates within specification.
