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.
P0652 is set when the voltage below 4.7V - minimum voltage of sensor power supply 2 generates from ECM - is detected for more than 0.1 sec.. This code is due to the short to ground in sensor power circuit or the voltage problem inside of ECM.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage monitoring |
•
RPS power supply circuit
•
APS 2 power supply circuit
•
BPS power supply circuit
•
ECM component
•
MAFS power supply circuit | ||
EnableConditions |
•
IG KEY "ON" | |||
ThresholdValue |
•
when the voltage is below the minimum voltage of sensor power supply ( below 4.7V ) | |||
Diagnostic Time |
•
0.1 sec. | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | YES | |||
MIL | NO | |||
Sensor power 1 | Sensor power 2 | Sensor power 3 | |||||||||
MAFS, APS 1 | RPS, APS 2,BPS,MAFS | A/C pressure transducer, VSA position Sensor | |||||||||
4830mV~5158mV | 4830mV~5158mV | 4830mV~5158mV |
