I am having a hard time retrieving codes on a 2001 Road King, with a magnetti mirelli computer with the power commander 2 hardwired in. I do the speedo self test and nothing happens, no sweep no lights, all i get in the gauge is something different. any help.

 

welcome:

The below is for M & M system on a 1998 evo
1-turn ignition key switch to ignition and then turn off 1 second after fuel pump stops.
2.repeat #1 again..remember 1 second after pump stops
3.turn ignition key switch to ignition and wait about 8 seconds for a bunch of flashing of the check engine light
it will then stop for 2 seconds..get ready... these are the codes you must count:
it will slowly flash 1,2,3,5....there is NO 4....this is the first digit of the 2 digit code ..so it can only be 1,2,3,5 __ __
then a 2 second pause...then you will get second digit of the 2 digit code..it can only be 1,2,3,4,5,6
remember after the complete 2 digit code is given you will go back to the rapid flash sequence..
there are a total of 15 codes available with this procedure
examples
52,53,54,55 bad news ECM replacement
56 crank/cam sensor
11 throttle sensor
12 barometric
14 engine temp. sensor
15 intake temp sensor
23 and 32 are injectors front/rear
24 coil
33 fuel pump relay--in this case you would not hear the pump but instead waited 3 seconds after the on / off sequence
update: Code 35 on Magnetti-Marelli EFI Systems
Normally a code 35 is set when there is a problem in the tachometer circuit. We
have identified another possible cause for a code 35 not specifically covered in the
Service Manuals. It pertains to a current or recurring historic code 35 (Tachometer)
on 1995-2001 EFI Touring models including Road Kings not normally equipped with
a tachometer. This code may be accompanied by codes 41, 42 or 56 and perhaps
even hard starting, poor cold idle and driveability issues. The ECM is functional
because it still has Key On power at pin 26.
Diagnosing this possible condition is relatively easy. Using the Scanalyzer, look for
consistent battery voltage in the data monitor mode (you may have to perform a
wiggle test while monitoring) because the Scanalyzer is monitoring voltage at pin 35
of the ECM (not battery voltage across the battery terminals). Closely inspect every
connection from the Main Circuit breaker to the ECM for loose crimps or
connections. Even a loose ECM fuse or intermittent ECM relay can cause this
condition.
? power commander II is not hardwired it is a piggy back. Power commander is connected with factory type connectors between bike cable and ECU and is reversible without cutting or splicing.
What exactly are you trying to accomplish?