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Old 07-06-2014, 02:06 AM
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Join Date: Nov 1999
Location: Brisbane, Australia, Q
Cobra Make, Engine: Contemporary CCX3117 427FE
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To program a VDO speedo (using the KM markers on the side if the road)
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 KM. 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 kilometre, 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 ^ Calibration Range 16000). Such a display indicates that the impulse rate detected during the reference mile you drove exactly matches the microprocessor's programmed rate for 1 kilometre. That means the speedometer is now perfectly calibrated to provide the most accurate display possible of both speed and distance. The speedometer finishes its Auto calibration by moving the pointer through a full sweep, then back down to zero.

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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