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General
Information:
The VDO
Programmable Speedometers featured in this installation manual are available in
three diameters: 3 1/8" (80mm); 3 3/8" (85 mm), and 4"(100 mm). The
speedometers are also available with different dial faces: (MPH, Km/h or
MPH-Km/h).
Incorporated
into each speedometer is the latest VDO microprocessor technology for measuring
speed and distance. These versatile instruments can be used in Original Equipment
Manufacturer applications as well as in aftermarket installations.
VDO
Programmable Speedometers can be used with inductive hall-effect, reed and on
manual transmissions, with OEM sensors. Use with electronic transmissions
requires the speedometer be hooked up to the electronic transmission control
box. Intermittent shifting may occur when connecting directly to OEM sensors in
electronic transmissions.
These
instructions describe the installation, wiring, calibration and operation of
all VDO Programmable Speedometers with LCD display.
CAUTION:
These instructions contain information about gauges of different sizes. You must determine the size of your gauge BEFORE
cutting any holes. Read these instructions thoroughly before making the installation.
Do not deviate from assembly or wiring instructions. ALWAYS
disconnect battery ground BEFORE making any electrical
connections. If in doubt, please contact your dealer or VDO Instruments at
(540)-665-2428.
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Sensor
Installation
The
speed sensor necessary to provide the signal to your new VDO Speedometer is not
included. This sensor is available from your auto parts dealer. (Part numbers
for VDO Hall-Effect Sensors are: 340011; 340012; 340013; and 340014. The VDO
Generator Sensor is Part # 340 001. VDO's Inductive Sensor is Part # 340020 or
340021.)
I.
Mounting the Speedometer
1. Refer
to Diagram B for dimensions. The 3 1/8" (80 mm) speedometer requires a
hole diameter of 3 1/8" (80mm); the 3 3/8" (85 mm) speedometer
requires a hole diameter of about 3 3/8"(85 mm); and the 4" (100 mm)
speedometer requires a hole diameter of about 4" (100 mm). If you are
mounting the speedometer into an existing panel, remember that the panel cannot
be more than 3/4" (20 mm) thick. Minimum mounting depth is 3 9/16"
(91mm).
2.
Careful measuring is a must for proper mounting of your
3. Cut
the hole. If you do not have a hole saw the exact size needed, use the closest SMALLER
size, and carefully widen the hole with a half-round file or other similar
device.
4.
Place the speedometer in the opening and secure it with the supplied VDO
Spin-Lok clamp as shown in Diagram C. You may also mount the speedometer with a
VDO mounting bracket and nuts (optional - must be purchased separately; they
are available from your VDO dealer).
II
Wiring the Speedometer
1.
Prepare insulated 1/4" spade terminals for use with the speedometer. Make
sure all wires are long enough to reach the necessary positive and negative
terminals and any wires from the sensor.
2.
Connect the wire from pin #4 to a switched + 12 volt or + 24 volt source. A
switched + 12 or 24 volt wire can be found coming from the ignition switch.
Follow this wire to a junction, and attach the wire from the speedometer. Refer
to Diagram D for the proper wiring of the speedometer.
3.
Attach the wire from pin #3 to a ground (negative) source. One such source can
always be found where the battery is attached to the metal frame of the
vehicle. Use an appropriate electrical connector to ground this wire.
4a. If
you are using a hall-effect speed sensor, attach the three hall-effect sensor
wires to the speedometer head as
a) RED to Terminal #2;
b) BLACK to be piggy-backed to
Terminal #3 and on to a suitable ground;
c) The OFF WHITE wire to a
butt-splice with two wires coming out of the butt-splice going to Terminals #6
and #8.
4b. If
you are using an inductive speed sensor, connect one terminal to pin #7. Connect
the other terminal to pin #8.
4c. If
you are using an electronic transmission, connect its speed signal wire to pin
#8.
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5. For wiring of the lights, see Diagram D below. Click on the image to enlarge.
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6.
Reconnect the battery and turn on the ignition to make sure the speedometer is
working. When you turn on the ignition, the speedometer will do an automatic
self-test. During this self-test, the pointer moves over the whole scale range,
and the LCD display shows the word "TEST." After the test is
completed, the display will reveal either the trip distance or the total
distance, depending on which one was selected when the ignition was turned off.
Since this is the first time power has been applied to the instrument, the
reading will be 000000, or 0000.0. If everything is working properly, the
installation is complete. If it isn't, re-check your wiring.
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III.
Calibrating the Speedometer
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Calibration
of the VDO Speedometer with LCD Display is a relatively simple procedure, and
can be accomplished in any of three ways:
•
Automatic calibration when driving on a road with the exact distance of l mile
clearly defined; or on a dynamometer
• By the input of the known pulse-per-mile (kilometer) for the vehicle and
sensor being used with the speedometer...
• Using a reference point for adjustment or fine tuning.
You
gain access to the calibration functions by pressing the button on the front of
the speedometer and holding it in while you turn on the ignition. As you
continue to hold in the button, the display will change ...scrolling through
the three calibration methods and stopping on each one for about two seconds.
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DIAGRAM
F (see above)
The
display lists the auto-calibrate mode as AUTOCL; the pulse-per-mile mode as
PULSE; and the reference/fine-tune mode as ADJUST. When you see the method you
wish to use, let go of the button and that function will be enabled. See
Diagram F.
Autocalibration
(AUTOCL)
The
auto-calibration function can be used successfully only on: A road with the
distance of one mile accurately designated or a dynamometer.
To
use the auto calibrate mode:
1.
Press the button on the front of the speedometer, hold it in, and start the
engine. Release the button when the display reads, "AUTOCL"
2.
After three seconds, the word "BUTTON" will show on the display. When
you are ready to begin your calibration run, press the button again. The
display will now begin flashing the word "START."
3.
Drive the reference distance of one mile (or 1 kilometer). NOTE: As you drive
this distance, the speedometer needle will not register or move. This is a
normal occurrence during the auto calibration process.
4. When
you have gone exactly one mile, press the button again. If the electronic
impulse rate detected by the speedometer's microprocessor is within the
calibration range limits of 500 to 399,999, the rate will be shown on the LCD
display. For example, your reading might be "P16000 ^
However, if the speedometer detects any kind of error during your run, the LCD will display the following, "P00". This means no useable impulse was detected. In this case, simply turn off the ignition, and start the process again.
REMEMBER:
During the autocalibration run, the pointer on the
speedometer will not operate.
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2.
Manual Calibration with a known value (PULSE)
If you
know the exact calibration value for the vehicle and type of sensor you are
using (pulse-per-mile or pulse per kilometer), you may use that value to
manually calibrate the speedometer.
To
calibrate your VDO Speedometer manually:
1.
Press and hold in the button on the front of the speedometer as you turn on the
ignition. Hold in the button until the word "PULSE" is displayed on
the LCD readout.
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2. As
soon as you see the word "PULSE," release the button. After a few
seconds, the display will start flashing a series of numbers (factory default
setting) that you can change to represent the correct calibration impulse
value. For example, a number like 50000 will show on the display, with each
digit flashing in turn, except for the last digit on the right, which is fixed:
first, the second 0 from the right; then the third 0 from the right; then, the
next 0; and finally, the 5th.
3. As
each number flashes, press the button to change it until the correct digit
appears (that is, the number you wish to input).
For
example, let's say the number that represents the correct calibration value for
your vehicle and sensor is"43850." When you begin the manual
calibration process, the LCD displays a default value. Each digit, except the
one farthest to the right, will flash, in turn, from right to left. Wait until
the second digit from the right starts to flash again. When it does, press the
button to start cycling through the numbers available for this digit. When the
number "5" appears, release the button.
At this
point, the number "5" is set, and the digit to its immediate left
begins to flash. Press the
4. When
you are satisfied you have properly entered the correct calibration value -
when that value is displayed on the LCD readout - take your finger off the
button and wait. After a few seconds, the value you have entered will be
downloaded into the speedometer's microprocessor, and the speedometer, will
revert back to normal operating mode. At this point, the manual calibration
process is complete.
In the
future, you can use this method to update the calibration value stored in the
computer should it ever become necessary. This function also allows you to
manually adjust the calibration value after you perform the automatic
calibration process.
3. Manual Calibration (Fine Tuning) (ADJUST)
You can
fine-tune the calibration of the speedometer's analog display (the pointer
showing miles-per-hour or kilometers-per-hour) by using speed test equipment
and the "ADJUST" function on the LCD readout. The pointer can be
repositioned anywhere within the calibration range of the speedometer.
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1.
Press and hold in the button on the speedometer as you turn on the ignition and
start the engine. Hold in the button until the word "ADJUST" shows
up. When it does, release the button.
2.
Press the button once, and the word "UP" will be displayed on the LCD
readout. Press it twice, in rapid succession, and the word "DOWN"
will be displayed.
3. When
either "UP" or "DOWN" is showing, press the button again,
and hold it in. If you hold the button in for just a short time, the pointer
will move slowly either upwards or downwards, depending on which mode you
selected. This allows for a very accurate adjustment of the pointer. Holding
the button in for a longer period of time makes the pointer move faster.
4. When
you have repositioned the pointer where you want it, release the button and
wait. If no further adjustments are made within one minute, the speedometer
will revert back to the normal operating mode.
NOTE:
If you move the pointer past the upper limit of the calibration range, the LCD
display will flash and you will only be able to adjust the pointer downward. If
you move the pointer past the lower limit of the calibration range, the LCD
display will also flash, and you will only be able to adjust the pointer upward.
IV
Operating the Speedometer
When
the speedometer is in the normal operating mode, the LCD readout acts as an
odometer, allowing you to display either total miles driven, or trip distance.
Total mileage is counted up to 999,999.9 miles. Trip distance is counted up to
99,999.9 miles.
To
display either Total Mileage or Trip Distance:
Press the button. If the Total Mileage had been showing on the LCD readout, it will change to Trip Distance when you push the button. If the Trip Distance had been showing, the display will change to reveal Total Mileage. See DIAGRAM J below.
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To
reset the odometer Trip Distance display to zero:
Push and hold in the button for about two seconds. The odometer will reset to 0.0 miles. Be aware that pushing and holding in the button will reset Trip Distance to zero regardless of which display is currently showing on the LCD readout - Trip Distance or Total Mileage. See DIAGRAM K below.
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TECHNICAL DATA:
Operating Voltage: 10.8 - 32 volts
Operating Current: <100 mA (<600mA with light)
Operating Temperature: -4 degrees F to 158 degrees F (-20 degrees Celsius to 70
degrees Celsius)
Protection: IP65 (front) Ozone and UV resistant housing
Dimensions: 3.6" (91mm)
Diameter: 3 1/8" (80mm)
3 3/8" (85mm)
4" (100mm)
Illumination: Backlit/Front lit dial and display