Tooney
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Diagnosing Charging Socket A/B or Left/Right Faults
Condition: The customer complains of vehicle unable to charge from right side charge socket. The workshop finds fault codes including P31E200 – Charging socket A, AC electrical system supply – short circuit.
Technical Background:
It is possible that either the left or right charging socket lid locking mechanism can stop sending feedback to the HV Onboard Charger (OBC). In this case, both charging socket lids can be opened because one is not sending a signal to lock the opposite side charge port. This loss of communication prevents charging on one of the charging sockets. In Guided Fault Finding (GFF), the driver side (left) charging socket is referenced as socket A, and passenger side (right) as socket B. This information is available along with a diagram in the GFF information for Fault Code P31CF00- Charging-socket lid A, locking detection, electrical fault.
Service Information
GFF does not include information pointing to the charging socket lids for some of these faults. Until these are
updated uniformly, check whether both lids are up at the same time. This signifies a fault in one of the charging socket switches.
There is a note in the GFF for P31CF00 that the fault can be caused by a malfunction of the opposite charging
socket lid. Before starting the troubleshooting, check whether the opposite charging socket lid can be opened.
If the charging socket lid cannot be opened, a resistance test must be performed on the limit switch.
https://static.nhtsa.gov/odi/tsbs/2024/MC-10252524-0001.pdf
Condition: The customer complains of vehicle unable to charge from right side charge socket. The workshop finds fault codes including P31E200 – Charging socket A, AC electrical system supply – short circuit.
Technical Background:
It is possible that either the left or right charging socket lid locking mechanism can stop sending feedback to the HV Onboard Charger (OBC). In this case, both charging socket lids can be opened because one is not sending a signal to lock the opposite side charge port. This loss of communication prevents charging on one of the charging sockets. In Guided Fault Finding (GFF), the driver side (left) charging socket is referenced as socket A, and passenger side (right) as socket B. This information is available along with a diagram in the GFF information for Fault Code P31CF00- Charging-socket lid A, locking detection, electrical fault.
Service Information
GFF does not include information pointing to the charging socket lids for some of these faults. Until these are
updated uniformly, check whether both lids are up at the same time. This signifies a fault in one of the charging socket switches.
There is a note in the GFF for P31CF00 that the fault can be caused by a malfunction of the opposite charging
socket lid. Before starting the troubleshooting, check whether the opposite charging socket lid can be opened.
If the charging socket lid cannot be opened, a resistance test must be performed on the limit switch.
https://static.nhtsa.gov/odi/tsbs/2024/MC-10252524-0001.pdf
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