DTC P0A1D-94: Hybrid/EV Powertrain Control Module Unexpected Operation [09/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Corolla, 2024 Toyota Corolla, and 2023 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU)
- Check the connections of the hybrid vehicle control ECU connector.
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [06/2018 - ]
OK
The connectors are connected securely and there are no contact problems.
Result
Result OK NG
Result:
NG
CONNECT SECURELY
Result:
OK
See step 2
- Check the connections of the hybrid vehicle control ECU connector.
- CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY) WARNING:
Be sure to wear insulated gloves and protective goggles.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.
- Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [06/2018 - ]
OK
The connector is connected securely and there are no contact problems.
Result
Result OK NG
Result:
OK
REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL [09/2022 - ]
Result:
NG
CONNECT SECURELY
- Check that the service plug grip is not installed.