DTC Advanced Diagnostics: P0562
DTC P0562:Charging System Low Voltage

General Description

Driven by the engine, the alternator generates electricity according to the commands from the powertrain control module (PCM). The local interconnect network (LIN) line is connected to the alternator and transmits/receives information to/from the PCM. The PCM 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 PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
60 seconds or more
DTC Type
One drive cycle, MIL off

Enable Conditions
Condition
Minimum
Maximum
Engine speed [Engine Speed]
500 rpm
–
[ ]: HDS Parameter

Malfunction Threshold
The FI MAIN RLY OUT terminal voltage is less than 11 V 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 poor or loose connection
Alternator side B terminal disconnection
Battery terminal fuse box side B terminal disconnection
12 volt battery voltage low
PCM 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 PCM 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.