MCi Crusader II 1989 Maintenance Manual page 250

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MC-9 MAINTENANCE MANUAL
ELECTRONIC SPEEDOMETER TROUBLESHOOTING (Cont'd)
SYMPTOMS
POSSIBLE CAUSE
4) Low reading just
slightly but speady
and same percent-
age low at all speeds.
4) Improperly calibrated head
or wrong size tire.
C. High Reading. C.
1) High reading at all
speeds but steady.
Reads some percentage
high at all speeds.
2) Meter pinned at
maximum reading.
1) Head improper! y
calibrated or for
differenf tire size.
2) (a) Bad head. Try new
head in vehicle.
(b) Shorted cable (if
new head does the
same thing or clears
but is erratic as you
move cable connector,
this proves cable is
not good).
3) Reads two times too 3) Magnets too close.
high exactly.
4) Reads two times too 4) Magnets too close.
high at speeds (over
25-30) but accurate
at Low speeds.
5) Reads 1-1/2 times too 5) One magnet too close or
high exactly. to powerfu I.
6) Reads 1-1/2 times too 6) One magnet too close
high at high speeds but or too powerful. .
accurately at low speeds.
SOLUTION
4) Install proper head or
reca I ibrate existing
head.
C.
1) Replace head with
properly calibrated
unit or recalibrate
existing head.
2) (a) Replace head &
return to factory.
(b) Replace cable or
clear short by
disassembling con-
nector and pulling
on wires & carefully
reassemb Ii ng •
3)
N-ove
pickup away from
magnets.
4) f'J.ove pickup away from
magnets.
5) Correct spacing depend-
ing upon reason for
magnet being too close.
6) Correct spacing or
replace magnet.