VSS Installation Guide Product # 8126VSS
Table of Contents Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Console & Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Harness and Adapter Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction This manual provides instructions and information necessary to install the VSS version of the DriveRight 600E device. Since the specific installation details vary from vehicle to vehicle, these instructions are intended to be a general guide for professional installers or for knowledgeable and experienced mechanics. We strongly recommend that you read the entire manual before beginning the installation. Be sure you understand each procedure thoroughly before starting that procedure.
Harness and Adapter Cables Digital Input Adapter Cable Harness Cable Wiring Red +12V Wire with Fuseholder (2) (22 AWG) Spade Terminal Sets #8-10 Studs (2) 1/4" Studs (2) (3.5 - 5 mm) (6 mm) Butt Splices (8) (26-22AWG or 24-20AWG) Blue Wire with Fuseholder (2) (22 AWG) Insulated Male Disconnects (4) (18-22AWG) T-Tap Disconnects Blue (1) Red (3) (14-16AWG) (18-22AWG) Black Ground Wire (1) (22AWG) Fuses (4) (3AG 1-1/4 x 1/4", .
Installations using Adapter Cable Digital Inputs If you are using the adapter cable digital inputs in your installation, the following additional tools and other items may also be required: • Crimping Tool • Multimeter • Fuse Tap - Required to obtain +12 V from the fuse panel. Planning Your Installation How DriveRight VSS Works DriveRight VSS obtains vehicle speed data from the vehicle’s built-in VSS (vehicle speed sensor) wire. When your car is moving, the speed sensor sends a signal to the console.
• Decide where to install the harness cable and where to connect the power and ground leads — Find a location inside the vehicle where you can bring together the harness cable leads, the VSS, power and ground tap wires and the adapter cable leads. The location must allow the adapter cable to reach the DriveRight console. • Determine where to connect the digital input leads (if used) — In many installations Digital Input 1 monitors brake lights and Digital Input 2 monitors headlights.
Procedure 1: Install the Harness Cable CAUTION: Always use safety stands when working under a raised vehicle. Never work under a vehicle supported only by a jack. Note: Make sure the harness cable and adapter cable can reach the DriveRight console mounting location before making the following connections. Locate and Tap VSS Wire 1. Locate your vehicle’s VSS wire. You can find the location of your VSS wire at the website for Rostra Precision Controls: www.rostra.com.
related equipment (headlights, tail lights, air bag, etc.) that you can tap into with an in-line splice. Possible candidate wires include those from the cigarette lighter, dome light, glove compartment light, clock, tail gate light, or other convenience functions. 2. Tap a red wire from the fuse holder to the unswitched +12 VDC source you located. Use either an in-line splice (included) or use a fuse tap connector (not included) appropriate for your vehicle.
Procedure 2: Install the Adapter Cable Two digital inputs located on the adapter cable are available to monitor the on/off state of lights, including brake lights, or of other 12 VDC electrical accessories. Typically Digital Input 1 monitors the brake lights and Digital Input 2 monitors the headlights. In the DriveRight software Digital Input 1 is recorded in the GPS table and in the accident logs. Digital Input 2 is only recorded in the GPS table.
two connectors together. The two cables will lock together when properly connected. Sliding Connector Housing Hold cables as shown to connect. The connector housing on the cable slides back when you make the connection, allowing the cables to lock together. Note: To disconnect the cables, hold both cables by the housing and pull apart. Sliding the housing on the adapter cable connector will release the lock and allow the cables to be separated.
Instructions for Using Velcro ® 1. Apply the two adhesive-backed Velcro loop tapes to the flat spaces on the back of the console or to the back of the bracket. 2. Attach the hook tapes to the loop tapes, then press adhesive backing of the hook tape onto your selected mounting surface. Do not separate the Velcro for at least 24 hours after applying. Sun Visor Mounting Visor Clip Use the visor clip to mount your console on a visor or door pocket. 1.
3. Once plugged in, the console should display the Current Readings screen. If the display remains blank, check if the battery is properly installed in the unit. If it is, press MODE. If it remains blank, check the adapter cable and harness cable connections. Configure the VSS Signal Settings Because not all VSS signals are the same, you may need to change the default DIP switch setting on the VSS in-line circuit. VSS Dip Switch • Switch 1 is used for square wave VSS signals which do not go to ground.
Troubleshooting section on page 12 in this manual as well as the troubleshooting information in the DriveRight 600E User’s Guide for help. VSS DIP Switch Flow Chart Use this flow chart to determine the optimum VSS dip switch setting. Set Yes 1 2 3 4 0 = OFF 0 1 0 1 1 = ON Drive 2 mph. Green LED flashing or dimmed? No Set 1 2 3 4 1 1 0 1 Drive 2 mph. Green LED flashing or dimmed? Yes No Set 1 2 3 4 1 0 1 1 Drive 2 mph. Green LED flashing or dimmed? Yes Turn Test LED Off (SW4) and you are done.
Troubleshooting If your speed is not registering correctly, consult the following check list to help you identify the cause of the problem. • Make sure the display is reading in the units (km/hr or mph) you expect. • Hold down the Set/Clr button in the Current Screen to change the units. • Make sure the unit has been calibrated correctly. • Check the calibration section of the DriveRight 600E User’s Guide. • Check the switch settings on the VSS in-line circuit and reset the settings if necessary.
Specifications Visit our website for additional product information: www.davisnet.com. VSS Compatibility The DriveRight can work with many different VSS signals provided the switch settings of the VSS in-line circuit are set correctly. However, if the signal does not meet the specifications below it may not work. Maximum VSS frequency: . . . . . . . . . . . . . . . . . .1 khz (144,000 PPM) at 25 mph Min peak to peak amplitude: . . . . . . . . . . . . . . . .1 volt at 5 mph Max peak to peak amplitude: . . .
Technical Support If you are experiencing problems with your DriveRight, first check the cable connections and verify the calibration settings. If you are unable to solve the problem, please call Davis Technical Support. We’ll be glad to help. Most questions can be answered on the phone. You can also email us for support, or visit our website. Sorry, we are unable to accept collect calls. Note: Please do not return items for repair without prior authorization.
