DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U0300-57: Internal Control Module Software Incompatibility Invalid/Incompatible Software Component [12/2021 - ]: Procedure

1. Check vehicle condition.

   Result

   Result	Proceed to
   for Gasoline Model	A
   for HV Model	B

Result: 

B 

See step  6

Result: 

A 

See step  2

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 

Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 10/2022] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 10/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2023 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]

Result: 

A 

See step  3

1. Using the Techstream, 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 [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

OK 

See step  4

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 [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

OK 

See step  5

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 [12/2021 - ]

1. 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 AWD with NICKEL METAL HYDRIDE BATTERY:

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]

for LITHIUM-ION BATTERY:

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2020 - ]

Result: 

A 

See step  7

1. Using the Techstream, perform a health check.

   OK

   ECUs other than the millimeter wave radar sensor assembly do not output specification information mismatch DTCs related to the hybrid vehicle control ECU assembly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

OK 

See step  8

1. Check that the hybrid vehicle control ECU assembly that is installed is a Toyota genuine part.

   OK

   The hybrid vehicle control ECU assembly that is installed is a Toyota genuine part

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

OK 

See step  9

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 [12/2021 - ]