P0562

DTC P0562

Circuit Description
The engine control module (ECM) monitors the system voltage on the ignition feed terminal to make sure that the voltage stays within the proper range. If the ECM detects an excessively low system voltage, this DTC will set. When the charging system detects a malfunction, the charge indicator will light.

Condition for Running the DTC
- The battery voltage is between 10-16 volts.
- The ignition switch is ON.
- The engine speed is higher than 500 RPM after engine started.

Condition for Setting the DTC
- The ECM detects that the ignition 1 feed circuit voltage is less than 7.8 volts.

Action Taken When the DTC Sets
- The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.

Condition for Clearing the DTC
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
- If the ignition voltage feed to the ECM is open, the engine will not start and the scan tool will not communicate with the ECM.
- A charging system problem may set this DTC.
- An intermittent or poor connection at the ignition 1 signal voltage feed (pin A-23 of J-218 connector) may set this DTC.

DTC P0562

Schematic Reference:
Engine Controls Schematics
Starting and Charging Schematics