DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed [04/2020 - 09/2022]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTCs
- Check for DTCs of hybrid control system.
Powertrain > Hybrid Control > Trouble Codes
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
B
GO TO HYBRID CONTROL SYSTEM
for NICKEL METAL HYDRIDE BATTERY: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022]
for LITHIUM-ION BATTERY: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 09/2022]
Result:
A
See step 2
- Check for DTCs of hybrid control system.
- CHECK FOR DTCs (HEALTH CHECK)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: System Select / Health Check.
- Check DTCs.
- Turn the power switch off.
OK
DTCs indicating a vehicle information mismatch with the hybrid vehicle control ECU are not output by any ECU other than the forward recognition camera.
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
A
REPLACE FORWARD RECOGNITION CAMERA. Refer to COMPONENTS [06/2018 - 09/2022]
Result:
B
REPLACE HYBRID VEHICLE CONTROL ECU. Refer to COMPONENTS [01/2019 - ]