DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U0300-57: Internal Control Module Software Incompatibility Invalid / Incompatible Software Component [08/2021 - ]: Description

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 300h, 2024 Lexus ES 250, 2023 Lexus ES 350, and 2023 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

For HV Model:

The forward recognition camera receives vehicle information (Conv/HV/EV) and vehicle information (transmission type) from the hybrid vehicle control ECU via the CAN communication line.
When the forward recognition camera is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) from the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU, the forward recognition camera outputs U0300-51.
When the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU does not match the vehicle information stored by the forward recognition camera, the forward recognition camera outputs U0300-57.

For Gasoline Model:

The forward recognition camera receives vehicle information (Conv/HV/EV) and vehicle information (transmission type) from the ECM via the CAN communication line.
When the forward recognition camera is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) from the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM, the forward recognition camera outputs U0300-51.
When the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM does not match the vehicle information stored by the forward recognition camera, the forward recognition camera outputs U0300-57.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0300-51	Internal Control Module Software Incompatibility Not Programmed	For HV Model: Once 3 seconds elapse after turning the ignition switch to ON, the system is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU and vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the forward recognition camera for approximately 3 seconds or more For Gasoline Model: Once 3 seconds elapse after turning the ignition switch to ON, the system is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM and vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the forward recognition camera for approximately 3 seconds or more	For HV Model: Hybrid control system Forward recognition camera Hybrid vehicle control ECU For Gasoline Model: SFI system Forward recognition camera ECM
U0300-57	Internal Control Module Software Incompatibility Invalid / Incompatible Software Component	For HV Model: Once 3 seconds elapse after turning the ignition switch to ON, the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU does not match the vehicle information stored by the forward recognition camera for approximately 1 second or more For Gasoline Model: Once 3 seconds elapse after turning the ignition switch to ON, the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM does not match the vehicle information stored by the forward recognition camera for approximately 1 second or more	For HV Model: Hybrid control system Forward recognition camera Hybrid vehicle control ECU For Gasoline Model: SFI system Forward recognition camera ECM

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0300-51

Internal Control Module Software Incompatibility Not Programmed

For HV Model:

Once 3 seconds elapse after turning the ignition switch to ON, the system is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU and vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the forward recognition camera for approximately 3 seconds or more

For Gasoline Model:

Once 3 seconds elapse after turning the ignition switch to ON, the system is unable to determine the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM and vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the forward recognition camera for approximately 3 seconds or more

For HV Model:

Hybrid control system
Forward recognition camera
Hybrid vehicle control ECU

For Gasoline Model:

SFI system
Forward recognition camera
ECM

U0300-57

Internal Control Module Software Incompatibility Invalid / Incompatible Software Component

For HV Model:

Once 3 seconds elapse after turning the ignition switch to ON, the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the hybrid vehicle control ECU does not match the vehicle information stored by the forward recognition camera for approximately 1 second or more

For Gasoline Model:

Once 3 seconds elapse after turning the ignition switch to ON, the vehicle information (Conv/HV/EV) and vehicle information (transmission type) sent from the ECM does not match the vehicle information stored by the forward recognition camera for approximately 1 second or more

For HV Model:

Hybrid control system
Forward recognition camera
Hybrid vehicle control ECU

For Gasoline Model:

SFI system
Forward recognition camera
ECM