Dynojet Autotune Installation guide

Auto Tune Installation Guide - 1
Basic installation and placement instructions are included in
the PCV installation guide for Harley Davidson models.
• The Autotune kit when used in conjunction with the PCV allows the bike
to be automatically tuned to a target air/fuel ratio. To use this feature
you must first enable Auto Tune in the PCV.
Go to Device Tools - Configure - Autotune.
EnablesAutotunefeature
Ifusingaswitch(notincluded)checkthisbox
Howmuchtimeafterstartingtheenginethesoft-
warewaitsuntilitstartssampling
Whattemperaturetheengineneedstoreachbe-
forethesoftwarestartssampling.
Themaximumthesoftwarewilltrimpersession
• Some models are shipped with the Autotune setup for basic mode (one
Target AFR table for both cylinders). If desired you can set different air/
fuel targets for each cylinder and each gear. Go to Device Tools -
Advance/Demote map.
Make sure that Fuel tables and Target AFR tables are set to the same
mode.
• EachHarleyDavidsonbasemapincludesabaseTargetAFRtable.These
settings are intended to deliver optimal performance while still
maintaining decent fuel mileage in the cruise area.
 ToaltertheAFRtargetclickonTargetAFRinthetreeview.Expand
each cylinder and/or gear if necessary to view the corresponding table.
If necessary type in different values in the cells. Multiple cells can be
highlighted by using click/drag with the mouse.
Showscurrenttablebeingaltered

• ItisrecommendedtoloadabasemapintothePCVthatbest
corresponds to your bikes current configuration. This will decrease the
time in which it takes for the Autotune module to achieve its target air/
fuel.
• AswitchcanbewiredintothePCV.Theswitchcanbeusedtotoggle
between your base map and learning mode. Any SPST (open/close)
typeswitchcanbeused.WhentheswitchisOPENthePCVwillbe
runningonthebasemap.WhentheswitchisCLOSEDthePCVwillgo
into learn mode and Autotune will start making fuel trim adjustments.
You can toggle between these modes at any time. The values learned
for the fuel trims will be saved if you toggle back to the base map.
• AfteraridingsessionyoucanviewtheTrimtablebyclickingonthe
respective cylinder in the tree view. To accept these trims and transfer
them into the Fuel map click on Auto Tune - accept trims. This will zero
out the trim table(s) and add the trim values to the base map(s).
The PCV is configured to only allow the software to trim +/- 20 until you
manually accept the trims. You can alter these limits in the Auto Tune
configuration. The more the PCV learns the lower you can make this
value. By lowering this value it will work as a safety net so if something
should go wrong in the unit or bike it will not cause the bike to run
poorly.
• ToverifythatAutotuneisworkingyoushouldseearealtimeAFR
reading in the lower right hand corner of the software.
A value of 0.00 could indicate a faulty sensor or the sensor wired
incorrectly to the module.
 Avalueof9.99couldindicatethattheCANterminationplugshavenot
been installed or Autotune has not been enabled in the software.
Tech tips
• Ifyoushouldseeabnormallyhighvaluesinthetrimtablesthencheck
the following:
 • Intakeleaks
 • Exhaustleaks-checkatallexhaustjunctions
 • Reversion-Ifusingthestockheaderswithaftermarketslip-onsthe
rear cylinder O2 sensor may see inaccurate readings. In these cases
you may have to zero out the Target AFR table for the rear cylinder
below 20% throttle. You can copy the values from the front cylinder
fuel table into the rear cylinder fuel table for below 20% throttle if
needed.
O2 sensor test
• TheAutotunekithasabuiltincircuitwhichallowsyoutotestthesensor
accuracy and condition.
 • Removethesensorfromtheexhaustsystemandholdinambientair.
 • VerifytheAutotunekithasbeenpoweredupforatleast1minute.
 • Pressandholdthefunctionbuttononthefrontofthecorresponding
Auto tune kit for 3 seconds and release the button.
 • TheLEDlightwillblinkrapidly,
 pauseforamoment,andthen
begin to flash.
 • Countthenumberofflashes
and refer to the chart.
 • Retestthesensorifthereis 
any question as to the purity
of the air during the test.
Auto Tune Installation Guide - 2
 Reversioncanalsobeanissueonbothcylindersifusingextremely
shortexhausts.
 • Sensorcondition-(seesensortest)
• Dynojetdoesnotrecommendinputtingvaluesinthe0%columnofthe
Target AFR tables. If you shoud need to tune the 0% column to combat
popping on deceleration input values directly in the Fuel tables.
• If fuel mileage is a concern then you can alter the Target AFR values in
the cruise range. Dynojet considers the cruise range to be 2500-
3500rpmand5-20%throttle(excludingVrod).StockAFRvaluesfor
thisrangeis14.7:1soyoucanleanoutthebasesettingsupthisvalue
if desired. Dynojet does not recommend making the bike any leaner
than14.7intheTargetAFRcells.
 • Dynojethasfoundthatforthebestcompromiseoffuelmileageand
 throttleresponsetosetthecruiserangeto13.7-14.0.
 • Forallotherranges12.8-13.4seemstoworkbest.Forthebest
results it is recommended to bring the bike to an Authorized Tuning
Center to have them verify the AFR values.
• Makesurethesensorisnotdroppedorsubjectedtowetconditions.
The O2 sensors used in this kit are a Bosch unit and do not come with
any warranty.