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Component Location

General Description

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)

ECM measures and compares voltage from ignition key and each relay. With this mechanism, ECM knows if the main relay switch turns on after IG on or if turns OFF after IG off.

DTC Description

If the system voltage is 2.54~10 V during 0.2 sec, ECM sets DTC P0562.

DTC Detecting Condition

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
Case1	Enable Conditions	• -
	Threshold Value	• Voltage < 2.54V
	Diagnostic Time	• 0.5 sec
Case2	Enable Conditions	• Engine speed > 2000rpm
	Threshold Value	• Voltage < 9.99V
	Diagnostic Time	• 0.2 sec
MIL ON Condition		• 3 driving cycle

Diagnostic Circuit Diagram

note

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