DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed [08/2020 - 08/2021]: Procedure

1. Using the Techstream, 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 Nickel Metal Hydride Battery: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

for Lithium-ion Battery: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ]

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: System Select / Health Check.
5. Check DTCs.
6. Turn the power 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  COMPONENTS [06/2018 - ] 

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Pre-Collision System / Data List.
5. Read the Data List according to the display on the Techstream.

   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	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  COMPONENTS [06/2018 - ] 

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  COMPONENTS [06/2018 - ]