The purpose of the System Voltage is to detect an excessively low or high system voltage that may be caused by a malfunctioning charging system.
System Voltage is the ignition voltage potential at the Powertrain Control Module (ECM/PCM)
ECM/PCM measures and compares voltage from ignition key and each relay. With this mechanism, ECM/PCM knows if the main relay switch turns on after IG on or if turns OFF after IG off.
If the system voltage is 2.54~9 V during 0.2 sec, ECM/PCM sets DTC P0562.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check, low | 1. Poor connection 2. Short to ground in control circuit 3. Charging system 4. Main relay |
Enable Conditions |
•
Time after engine start > 120sec. | |
Threshold Value |
•
Voltage : 2.54~9V | |
Diagnostic Time |
•
0.2 sec | |
MIL ON Condition |
•
3 driving cycle |
