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no diag mode

5.2K views 9 replies 3 participants last post by  1/2 Ton  
#1 ·
Hello, I have a 2018 fatboy with check engine light on
and cannot enter diag mode to check codes.
I hold mode sw then ignition to on and display sets to normal run mode.
 
#2 · (Edited)
Is the Run / Off switch set to Run?

Do you have the Factory Service Manual and the Electrical Diagnostic Manual?
Follow the instructions in the initial Diagnostics: Step by step. (this can be a long process)

Without the Electrical Diagnostic Manual, the bike needs to be taken to HD Service in order to connect with a Digital Tech II.
 
#3 ·
Is the Run / Off switch set to Run?

Do you have the Factory Service Manual and the Electrical Diagnostic Manual?
Follow the instructions in the initial Diagnostics: Step by step. (this can be a long process)
yes ignition/run sw to run after holding mode sw.
aah no to the manuals . . . is this info online or should I hunt for a paper manual.
ta.
 
#5 ·
Ignition (key) Switch: OFF
Right hand run/stop switch to ON
Hold the trip-reset switch down while turning the (Key) ignition switch to RUN.