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The speed reading on the Trip 500AL agrees
with my vehicle’s speedometer, but the dis-
tance reading on the Trip 500AL and my
odometer differ (or vice versa).
For best accuracy, you should calibrate using
the car’s odometer (see “Calibration Using
the Odometer” on page 10). You may read-
just the unit’s calibration periodically (to
maintain accuracy) use the PLUS and MINUS
buttons to readjust the distance reading to
match the vehicle’s trip meter reading after a
long trip.
❏
The Trip 500AL seems to be recording erro-
neous readings at low speeds.
Excessive mechanical vibrations at low
speeds can cause erroneous readings. Have
your installation checked if you have this
problem.
❏
The display is black or all the segments
appear to be on.
The display was left in direct sunlight. The
display will return when it cools down. Even
though the display is black, the Trip 500AL
continues to record data.
❏
The tamper light won't go off.
Enter your security code (see “Tamper Pro-
tection” on page 29).
❏
I’ve forgotten my secret code.
If you have the software, you can read the
vehicle’s code. Otherwise, ship the unit back
to us with a check for $25.00 and a note
explaining the situation. We will return the
unit to you with the code set to 0000.
