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 specified value for a specified 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 11.0 V or less for at least 60 seconds.
Possible Cause
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, regulator failure)
- Alternator stopped by over temperature
- Alternator side B terminal disconnection
- Under-hood fuse/relay box side B terminal disconnection
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.