Hi Anonymous, if you have a 2003 or older Harley Davidson here is how you can access the Diagnostic Fault Codes through your speedometer.
The reset switch is used to change the odometer display between mileage and trip values and to reset the trip odometer. It is also used to identify the speedometer calibration and to enter the diagnostic mode, clear diagnostic codes and exit the diagnostic mode.
The Diagnostic Mode is entered by holding down the odometer reset button with the "off/run" switch in the run position, turn the ignition from OFF to ON and wait for the fuel pump to stop priming then let go of the reset button. The normal power-up sequence will occur and before entering the diagnostic mode diagnostic codes set during this power-up sequence will be stored as well. When in the diagnostic mode the odometer will display the first diagnostic code. When the trip switch is pressed again the next code will be shown. If the trip switch is pressed for more than 5 seconds at any time while in the diagnostic mode, the diagnostic code displayed will be erased.
There are 7 different diagnostic codes available:
d01 - Speed sensor power output shorted low
d02 - Speed sensor power output shorted high or open
d03 - Not Used
d04 - Not Used
d05 - Speed sensor return shorted high
d06 - Speed sensor return shorted low
d07 - Not Used
d08 - Speedometer power over voltage
d09 - Speed output shorted high
d10 - Speed output shorted low or open
CAL XX - Speedometer application calibration number:
14 = Domestic
15 = HDI
When in the diagnostic mode, all codes are displayed in sequence from d01 to d10.
As a code appears in the display (for instance d02), it will read
"d02Set" if set or "d02CLr" if clear.
You can exit the diagnostic mode by turning ignition from ON to OFF to ON again without depressing the reset switch or if a speed signal greater than 5 MPH is detected.
Diagnostics cannot be performed if system voltage is less than 9 VDC or greater than 16 VDC. The only exception is d08 which is set when system voltage is greater than 16 VDC.
After all the diagnostic codes are displayed, the speedometer
Calibration number is displayed example CAL 14 if you change rear wheel size or gearing you need to visit your local Dealership to have your speedometer re-calibrated.
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2003 Harley Touring Service Manual pdf
2005 Harley Davidson Road King Classic EFI Owner Manual
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