DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U0300-57: Internal Control Module Software Incompatibility Invalid/Incompatible Software Component; DTC U0301-57: Software Incompatibility with ECM/PCM Invalid/Incompatible Software Component [10/2023 - ]: Procedure
WARNING: This page is about a different car, the 2024 Lexus LS 500. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTCs (Engine)
- Check for DTCs.
Powertrain > Engine > Trouble Codes
HINT:
If DTC U0300-51, U0300-57 or U0301-57 is output, inspect the SFI system first as a SFI system DTC may be stored.
Result
Result Proceed to SFI system DTC is not output A SFI system DTC is output B
Result:
B
GO TO SFI SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - ]
Result:
A
See step 2
- Check for DTCs.
- CHECK FOR DTCs (HEALTH CHECK)
- Using the GTS, perform a health check.
OK
ECUs other than the forward recognition camera do not output specification information mismatch DTCs related to the ECM.
Result
Result Proceed to DTC is not output A DTC is output B
Result:
B
REPLACE ECM. Refer to REMOVAL [10/2023 - ]
Result:
A
See step 3
- Using the GTS, perform a health check.
- READ VALUE USING GTS (Powertrain Information)
- Using the GTS, read the Data List.
Chassis > Front Recognition Camera > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Powertrain Information Powertrain information Conventional, SS, HV, PHV, EV, 1MHV, FCV or Default Value Conventional: Conventional vehicle
SS: w/ Stop and start vehicle
HV: HEV
PHV: PHEV
EV: BEV
1MHV: 1MHV
FCV: FCEV
Default Value: Vehicle information not confirmed- Chassis > Front Recognition Camera > Data List
Tester Display Powertrain Information HINT:
- When the specification stored by the forward recognition camera and the vehicle specification do not match, there is a malfunction in the specification information stored by the forward recognition camera. Therefore, replace the forward recognition camera.
- When the specification stored by the forward recognition camera and the vehicle specification match, a ECM with different specifications may be installed. Therefore, replace the ECM.
Result
Result Proceed to - Vehicle information stored in the forward recognition camera and actual vehicle specifications do not match
- Not confirmed is displayed
A Vehicle specification information stored in forward recognition camera and actual vehicle specifications match B
Result:
A
REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [10/2023 - ]
Result:
B
REPLACE ECM. Refer to REMOVAL [10/2023 - ]
- Using the GTS, read the Data List.