DTC P31B4-00: Extreme Hybrid/EV Battery Charging Current [06/2020 - ]: Procedure

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CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.

Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Powertrain > Hybrid Control > Trouble Codes

Result

Result	Proceed to
"P31B4-00" only is output.	A
DTCs except "P31B4-00" of hybrid battery system are output.	B
DTCs except "P31B4-00" of hybrid control system are output.	C

Turn the ignition switch off.

Result:

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

Refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result:

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - ]

Result:

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 12/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]