Advanced Diagnostics

Advanced Diagnostics - DTC P0562: Charging System Low Voltage (Engine Type: K24Z7)

General Description






The alternator is driven by the engine, and it generates electricity according to the commands from the engine control module (ECM). The LIN line is connected to the alternator and transmits/receives information to/from the ECM. The ECM sets a target generating voltage in the range of 12.5 V to 14.5 V and commands the alternator via the LIN line. If the FI_MAIN_RLY_OUT terminal voltage is a set value for a set time, the ECM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The FI_MAIN_RLY_OUT terminal voltage is 11.0 V or less for at least 60 seconds.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

- Alternator failure (field coil open, stator coil open, voltage regulator failure)
- Alternator stopped by over temperature
- Battery line open
- ECM internal circuit failure

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the ECM memory. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.