Auto Meter 6002 - Manual (Page 51)

Chapter 6. Troubleshooting
Street Dash Users Guide 45
No. Symptom Possible Cause Remedy Notes
19 Display values and
messages unclear
or unreadable
(poor contrast) Display too hot or
too cold
Ensure that the
display is
operated within
the specified
temperature range Operating
temperature
is +5
° F to
+158
° F
20 No RPM speed
reading Incorrect wiring Check the
connection of the
engine speed wire
to the ignition
system (or sensor,
if used) See
instructions
supplied in
this manual.
If connected
directly to the
coil, check
that it is to
the switched
low tension
side (usually
the negative
side).
21 Displayed RPM
value too high or
too low by a
constant %-age
amount.
System configured
with wrong number
of engine cylinders.
Reconfigure
system to correct
number of
cylinders. Ignition
systems may
either:
-produce
"waste"
sparks giving
double the
number of
cylinders per
revolution
Ignition system
pulses per
revolution not same
as number of
cylinders
Reconfigure
system to correct
number of pulses
per revolution. -use multiple
coils where
each
additional
coil gives
proportionate
ly fewer
pulses per
revolution.