Müsste mal einer von euch überprüfen, ob das so auch klappt - hab ich in einem amerikanischen Forum gefunden:

DTC Speedo Codes 03 and Earlier

Here are some trouble codes that can be accessed with your speedo on 03 and older models.

Information
Speedo Checks ('03 and earlier):
press the odometer switch in while turning the ignition on (with the run switch engaged)

d01 is the Speed sensor output shorted low,
d02 is Speed sensor power output shorted high or open,
d03 and d04 are not used,
d05 is Speed sensor return shorted high,
d06 is Speed sensor return shorted low,
d07 not used,
d08 is Speedometer power overvoltage,
d09 is Speed output shorted high and
d10 is Speed output shorted low or open.
If the code has CLr added (d01CLr) which means clear no problems
The CAL 03 will be the last one Calibration 3=Domestic.


Im Anhang noch eine Anleitung für die Baujahre 2000-2003. Danke an V-Michel!