Twin Scan II Series

 

Twin Scan II Low Cost Scan Tool

· Compatible with 2001-2010 H-D^® fuel injected models using Delphi^® system (including V-Rod^®) and 2003-2006 carbureted models with new 12 pin ignition module

· Support for new 2006-2010 closed loop fuel injection systems

· Displays throttle position and twist grip sensor data on new 2008-2010 touring models with electronic throttle control

· Uses laptop PC for display. Includes Windows software

· Reads and clears diagnostic trouble codes from engine control module (ECM), turn signal/security module (TSM/TSSM), speedometer, tach, and anti-skid braking system (ABS)

· Real time display of engine data on instrument panel type display

· Built-in data logging. Stores up to 45 minutes of data. Automatically triggers when a trouble code is set. Shows data before and after code is set

· Includes two analog inputs for air/fuel ratio (AFR). All Twin Scan II units can be upgraded to Twin Scan II+ for use as tuning aid

· Compact size: 3.1"L x 1.6"W x 0.8"H

 

Twin Scan II+ Tuning Aid for Screamin Eagle^® Pro Super Tuner, Screamin Eagle^® Race Tuner (SERT), Dynojet Power Commander, and Daytona Twin Tec Twin Tuner

· Complete kit that includes a WEGO IIID dual channel wide-band oxygen sensor system for logging front and rear cylinder air/fuel ratio (AFR) data along with engine data 

 

Twin Scan II+ Kit

 

· Ideal tuning aid for Screamin Eagle^® Pro Super Tuner,  Screamin Eagle^® Race Tuner (SERT), Dynojet Power Commander, and Daytona Twin Tec Twin Tuner. Twin Scan software analyzes logged data and displays AFR and the required volumetric efficiency (VE) correction (in percent) with the same RPM rows and throttle position sensor (TPS) or manifold pressure (MAP) columns used in Super Tuner, Power Commander, and Twin Tuner tables 

· New version 4.0 Twin Tuner II software can directly copy and paste to an Excel spreadsheet that you can use to calculate the required corrections and then copy and paste the data to the Super Tuner or Power Commander software. You can also directly export calculated fuel correction data to Twin Tuner data files.  

Visit our Tech FAQ and find out more about engine diagnostics!

New Harley-Davidson^® motorcycles use the SAE J1850 data bus for communications between the engine control module (ECM), instrument module (IM), turn signal/security module (TSM/TSSM), anti-skid braking system (ABS) and diagnostic scan tools. The Twin Scan II is a low cost scan tool that is compatible with 2001-2010 H-D^® fuel injected models using the Delphi^® fuel injection system (including V-Rod^®) and 2003-2006 carbureted models with new 12 pin ignition module. Please note that 1999-2003 carbureted Twin Cam 88^® models and all models with the earlier Marelli^® fuel injection lack the J1850 data bus and are not compatible with the Twin Scan.

The Twin Scan II connects to the four terminal Deutsch style data link connector on the H-D^® wiring harness and requires a laptop PC for user interface and data display. You can read and clear diagnostic trouble codes from the ECM, TSM/TSSM,  speedometer, tach (on models with IM data bus), and ABS (if equipped). You can view real time engine data on an instrument panel type display.

Download Twin Scan II Instructions

Twin Scan II Software

The Twin Scan software has four major functions: reading and clearing diagnostic trouble codes, displaying real time engine data, displaying logged data, and analyzing AFR data (if used with optional WEGO IIID). 

Diagnostic Trouble Codes

The unit will display information for all available modules (this includes the speedometer and tach on models with the instrument module on the data bus and the ABS). The upper half of the screen displays the system ID and calibration code information. The lower half of the screen displays diagnostic trouble codes. Each current and historic trouble code is displayed along with a brief description. The software includes a database of all diagnostic trouble codes published by Harley-Davidson^®. You can then refer to the H-D^® Electrical Diagnostic Manual for your model for detailed explanations and troubleshooting flowcharts.

You can print the displayed information to any Windows printer by clicking on the Print Codes button. You can clear any codes by clicking on the Clear Codes button.

Diagnostic Trouble Code Display

Real Time Engine Data

You can display real time engine data on an instrument panel type layout with round tach and speedometer gauges and bar graph type gauges for most other parameters. Barometric pressure, idle RPM and system status are displayed in additional boxes. If the engine is not running, most values will appear as zero. The screen snapshoot below shows the parameters displayed for a 2010 touring model with electronic throttle control. A subset of these parameters is displayed for other engine systems.

2008-2010 touring models feature electronic throttle control. In order to test and tune these models, you need to know the position of the twist grip sensor (TGS) and electronic throttle actuator (TPS). The Twin Scan II real time engine data display gives you this critical information (TGS% and TPS% in the upper right corner of the screen).

You can log data directly to the laptop PC while real time engine data display is active by clicking on the Start Data Logging button. Data is logged to a buffer memory on the laptop PC that stores 1450 data points using data logging interval ranging from 0.25 to 2.0 seconds. You can start and stop data logging as desired. The last 1450 data points will remain in the program data buffer.

Real Time Engine Data Display

Data Logging

You can display data downloaded from the Twin Scan II (if the unit has been operated on the motorcycle in stand-alone mode) or directly logged while real time display was active. The logged data appears on a chart recorder type screen. The screen snapshot below shows the complete set of parameters. Depending on the actual engine control system, a subset of these parameters is displayed. You have a range of capabilities for analyzing and printing the data. Data can also be saved to a file for future reference.

Data Logging Chart Display

AFR Data Analysis

The Twin Scan II+ is a complete kit that includes a WEGO IIID dual channel wide-band oxygen sensor system. When the WEGO IIID is connected, the Twin Scan II will log engine data along with the actual front and rear cylinder air/fuel ratio (AFR). The Twin Scan II+ is an ideal tuning aid for use with the new Screamin Eagle^® Pro Super Tuner, Screamin Eagle^® Race Tuner (SERT) or Dynojet Power Commander on fuel injected motorcycles. The figure below shows logged AFR data that has been analyzed and displayed in Twin Cam 88^® format. You can select from 11 different formats for both Twin Cam 88^® and VRSC (V-Rod™) engines. AFR data is displayed with the same RPM rows and throttle position sensor (TPS) or manifold pressure (MAP) columns used by the Super Tuner, DynoJet Power Commander, or Daytona Twin Tec Twin Tuner.  

Twin Scan II AFR Data Display

You can also display and print out the required volumetric efficiency (VE) correction (in percent) based on the AFR command. This gives you the required fuel correction. You can add data from an unlimited number of files that you previously saved. The data will be analyzed and incorporated into the table. Cells that vary more than ±0.5 AFR from the command value are shaded blue for rich or red for lean.

Twin Scan II VE Percent Correction Display

You can use two approaches to make the required corrections in the Super Tuner or Power Commander programs. If you have Microsoft Office with Excel, you can directly copy and paste data from the Twin Scan II software to an Excel spreadsheet and then copy and paste from the Excel spreadsheet into the tuning program. In the Twin Scan II software, you can select a range of cells with the mouse and right click to bring up a copy menu. You can also left click on the upper left legend cell to select the entire table and then right click to bring up the copy menu. For more details on using Excel, including sample spreadsheets, please visit the Twin Scan II Tec FAQ. Alternately, you can manually enter the required corrections in the tuning program by referring to the printed VE percent correction table and marking off cells as you edit them. The figures below show a typical Super Tuner VE table and Power Commander fuel table. When used with the Daytona Twin Tec Twin Tuner, the program can directly export VE correction data to Twin Tuner data files.

Typical Super Tuner VE Table

T

Typical Power Commander Fuel Table

The Twin Scan II software runs under Microsoft Windows XP/Vista/7. We no longer support older Windows versions. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The Twin Scan II connects to the PC by means of a USB interface. A USB cable is supplied with the unit. The PC must have a free USB port. If you have an older PC without USB capability, you cannot use the Twin Scan II. For more detailed product information, we suggest that you download the Twin Scan II software and instructions. The software download includes sample files with actual data.

Download Twin Scan Software 

The Twin Scan II can be used with an easily fabricated exhaust sniffer that allows temporary installation on most motorcycles for tuning and diagnostic purposes. The exhaust sniffer is constructed from sections of copper pipe that are soldered together. All the required parts are readily available at any hardware store. For more details refer to the Motorcycle Exhaust Sniffer Tech Note.

Motorcycle Exhaust Sniffer 

Motorcycle Exhaust Sniffer Installation