DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed [12/2019 - 09/2020]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for HV Model	A
   for Gasoline Model	B

Result: 

B 

See step  5

Result: 

A 

See step  2

1. Using the GTS, check for hybrid control system DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   Hybrid control system DTCs are not output	A
   Hybrid control system DTCs are output	B

Result: 

B 

GO TO HYBRID CONTROL SYSTEM 

for AWD: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]

for 2WD: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]

Result: 

A 

See step  3

1. Check DTCs.
2. Turn the ignition 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

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

OK 

See step  4

1. Read the Data List according to the display on the GTS.

   Body Electrical > Pre-Collision System > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Information (Conv/HV)	Vehicle information (Conv/HV)	Unknown / Conv / HV	Unknown: Vehicle information not confirmed Conv: Conventional HV: Hybrid vehicle	-

   Body Electrical > Pre-Collision System > Data List 

   Tester Display
   Vehicle Information (Conv/HV)

   HINT: 

   • If the vehicle information stored in the forward recognition camera is different than the actual vehicle specifications, the vehicle information stored in the forward recognition camera may be incorrect. Check for DTCs and replace the forward recognition camera if necessary.
   • If the vehicle information stored in the forward recognition camera matches the actual vehicle specifications, the installed hybrid vehicle control ECU is incompatible. Replace the hybrid vehicle control ECU with a correct one.

   Result

   Result	Proceed to
   Vehicle information stored in forward recognition camera and actual vehicle specifications do not match	A
   "Unknown" is displayed
   Vehicle information stored in forward recognition camera and actual vehicle specifications match	B

Result: 

A 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [12/2019 - 09/2020] 

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022] 

1. Using the GTS, check for SFI system DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

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

Result: 

B 

GO TO SFI SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] 

Result: 

A 

See step  6

1. Check DTCs.
2. Turn the ignition switch off.

   OK

   DTCs indicating a vehicle information mismatch with the ECM are not output by any ECU other than the forward recognition camera.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020] 

Result: 

OK 

See step  7

1. Read the Data List according to the display on the GTS.

   Body Electrical > Pre-Collision System > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Information (Conv/HV)	Vehicle information (Conv/HV)	Unknown / Conv / HV	Unknown: Vehicle information not confirmed Conv: Conventional HV: Hybrid vehicle	-

   Body Electrical > Pre-Collision System > Data List 

   Tester Display
   Vehicle Information (Conv/HV)

   HINT: 

   • If the vehicle information stored in the forward recognition camera is different than the actual vehicle specifications, the vehicle information stored in the forward recognition camera may be incorrect. Check for DTCs and replace the forward recognition camera if necessary.
   • If the vehicle information stored in the forward recognition camera matches the actual vehicle specifications, the installed ECM is incompatible. Replace the ECM with a correct one.

   Result

   Result	Proceed to
   Vehicle information stored in forward recognition camera and actual vehicle specifications do not match	A
   "Unknown" is displayed
   Vehicle information stored in forward recognition camera and actual vehicle specifications match	B

Result: 

A 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [12/2019 - 09/2020] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]