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 signals 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 is set if fuel supplied to injector is not limited(fuel cut disabled) and injector operates when accelerator pedal is released(when vehicle coasts). This code is due to the case that ECM fails to cut power of injector operating system inside of ECM.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Software monitoring | ● ECM internal error | ||
Enable Conditions | ● Engine running | |||
Threshold Value | ● Injector operating signal duration exceeds max value for more than 12 times. ● The difference between engins speed and segment speed is above 320rpm. - 0.8 sec. | |||
Diagnostic Time | ● Refer to Threshold value | |||
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.
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.
