Diagnostic Test

Check the number of control units replaced before detecting "U0300".

Is the number of replaced control units one?

YES 

Since the replaced control unit may be out of specifications, check the part number and specifications.

NO 

GO TO STEP 2. 

With CONSULT 

1. Remove one of the replaced control units.
2. Install the previous control unit mounted before replacement.
3. Turn ignition switch ON and wait 2 seconds or more.
4. Perform "Self Diagnostic Results" in "TRANSMISSION".

Is "U0300" detected?

YES 

Turn OFF the ignition switch to check the other control units in the same method.

NO 

Since the removed control unit may be out of specifications, check the part number and specifications.