S&S Cycle Serial Delphi Style VFI (Variable Fuel Injection) Module and ProTune II Software - Manual (Page 10)

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BASIC TROUBLESHOOTING AND TUNING SUGGESTIONS
The following section includes troubleshooting and tuning information to aid in the diagnosis and correction of common vehicle running and
drivability issues. These issues include no start/run condition issues, performing a map merge when the adaptive fuel values max out, calibrating
the stepper motor to improve idle control, and steps to tuning the vehicle startup. These sections will cover the basic issues that arise and provide
information for you or a tuning center to correct them.
If performing the tasks outlined in this section does not correct the problem, please contact S&S Tech Services. Be prepared to list details about
your motorcycle and engine configuration. Model year, displacement, compression ratio, camshaft, intake, and exhaust are typical items needed to
determine if the calibration is correct. Also, be prepared to provide the part number or details about the calibration you are using. This information
can be found in the Comment Field portion of the calibration. This is accessed through the View menu of ProTune II as noted in the Loading a
Calibration section. You may also be asked to send your current calibration to S&S via e-mail.
No Start/Run Condition
Follow these steps if the vehicle has a no start issue or will not continue running after startup:
See ProTune II manual or help files installed with the software for additional information on the functions referenced in this section.
1- Verify the correct calibration has been loaded by reviewing the notes in the calibration comment field.
2- If the motorcycle has an S&S or other aftermarket throttle body, please review setup instructions for those components. Typical S&S throttle
body closed throttle voltage setting with a factory set, adjustable TPS is 0.50 V. Variation of +/- 0.02 V is typical. Some calibrations are designed
for a stock, non adjustable (fixed) TPS. In this case, the closed throttle voltage will be lower (typically about 0.40 V). Please, note what type of
TPS the calibration is designed for in the comment field of the calibration.
3- Perform Test Outputs function found under the Options menus in the ProTune II software. Specifically, check to ensure that both injectors
and ignition coils are working correctly and installed on the correct cylinder. Also verify that the stepper motor (Idle Air Control) is functioning
properly. Also, verify that the oxygen sensors are operating and installed on the correct cylinder. Disconnect one oxygen sensor and start
vehicle. Observe the gauge panel to verify correct sensor is being shown as not operating.
4- Verify fuel pressure maintains 58 psi during startup and operation.
5- Verify that the VFI module is powering down properly. When the VFI module is powering down (ignition on then off) the stepper motor will
move through a recalibration process of closing to 0 steps and then opening to a set position. During this time the VFI module will remain in
communication with the ProTune II software for approximately 10 – 15 seconds after the ignition switch is turned off. If this does not happen,
verify components and wiring to pin 31 of the VFI module for the constant or ECM power system of the motorcycle.
6- If the engine starts and runs for a few seconds, then quits this could be a possible Bank Angle Status issue. Observe the reading of the Bank
Angle Status on the Gauge panel. If Bank Angle Status is indicating “Tripped” verify that the installation of the VFI sub harness was completed
as noted in the installation instructions. The motorcycle will not run with tripped bank angle status. Also, try disconnecting the battery then
reconnecting as outlined in the installation instructions.
Map Merging
If a DTC has been set for front or rear Adaptive Maxed Out it is possible that a map merge needs to be performed. Motorcycles using oxygen sensors
with closed loop fuel control will learn adaptive fuel based on the feedback from the oxygen sensors. These adaptive fuel values apply an offset
to the main fuel table to maintain an air fuel ratio that matches the settings specified by the Target Closed-Loop Fuel Map. There are limits though
to the amount of fuel that can be added or removed by the closed loop fuel system. If the adaptive map values reach the limits of closed loop fuel
control the check engine light will illuminate and a DTC will be set for the related front or rear adaptive maxed out. When this occurs ProTune II can
be used to merge the values of the adaptive fuel control into the main fuel table. This creates a new fuel table and resets the adaptive fuel maps to
allow closed loop fuel control to have the full range of control again. The following steps cover how to merge the adaptive fuel table into the main
fuel table:
See ProTune II manual or help files installed with the software for additional information on the functions referenced in this section.
1- Save the current tune file. With ProTune II connected select Load All Data to Computer… from the File menu. In the new window that opens
enter the name of the file, pick the location to save it, and select save. This should be done so you can reference the original calibration if
needed.
2- Go to Advanced level of ProTune II. Under the options menu in ProTune II and choose Select User Level…. In the new window that opens,
select ADVANCED High-Level Tuning from the drop down list and hit OK.
3- To view the adaptive fuel maps select Front Cylinder Adaptive Map or Rear Cylinder Adaptive Map from the View menu. View each adaptive
map and take note of the readings. Any values at or near the max or min of 30% will illuminate the check engine light. The maps will appear
rough with some spikes in areas where the main fuel map is not tuned correctly. If this is the case proceed with completing the adaptive map
merge. If the maps have multiple spikes with large swings of positive and negative values in adjacent points of the map there is likely an issue
that is leading to bad adaptive data. If this is the case see the notes at the end of this section.
4- Observe front and rear cylinder trim maps by select Front or Rear from the top row of icons in ProTune II. Sometimes, one or the other will
have an area set to “-100%” to help reduce decel popping. If this is the case, it is recommended that this section be temporarily set to 0% during
the map merge. After changing the values from -100% to 0% save the map to the ECM by selecting the Saveg icon from the row of icons in
ProTune II. In the new window that opens the ECM will be selected by default. Select OK to save the map to the ECM.