DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U0300-57: Internal Control Module Software Incompatibility Invalid/Incompatible Software Component [08/2023 - ]: Procedure

1. Check for DTCs of SFI system.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO SFI SYSTEM 

for Gasoline Model:

for HEV Model:

Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - 08/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2024 - ]

Result: 

A 

See step  2

1. Using the GTS, perform a health check.

   OK

   ECUs other than the millimeter wave radar sensor assembly do not output specification information mismatch DTCs related to the ECM.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [05/2022 - 08/2024]  , or refer to  REMOVAL [08/2024 - ] 

Result: 

OK 

See step  3

1. Check that the ECM that is installed is a Toyota genuine part.

   OK

   The ECM that is installed is a Toyota genuine part.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [05/2022 - 08/2024]  , or refer to  REMOVAL [08/2024 - ] 

Result: 

OK 

See step  4

1. Check for DTCs.

   Body Electrical > Front Radar Sensor > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

A 

END 

Result: 

B 

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to  REMOVAL [08/2023 - ]