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1. Remove overlay decal from front of Diagnostic ACE so numbers “0” to “17”
next to LED’s are visible.
2. Set ECU to special diagnostic mode:
A. Turn ignition key switch
OFF.
B. Raise seat and set Backlap switch to
FRONT backlap position.
C. Set Enable/Disable switch to
DISABLE position.
D. Hold Lower/Mow-Raise lever in
RAISE position and turn ignition key switch
to
ON position. Release Lower/Mow-Raise lever.
3. Slowly turn HOC Selector. LED’s on Diagnostic ACE will show how ECU is
enterpreting HOC Selector. LED labeled “0“ should be illuminated when knob is
pointed to “A”, and LED labeled “15” should be illuminated when knob is pointed
to “P”. Table below shows when machine is set for correct clip. It is not necessary
for knob to line up with letters on decal for machine to function normally.
Diagnostic
ACE Display
LED
HOC
Selector
Position
8 Blade Height-of-cut 5 Blade Height-of-cut
Inches mm Inches mm
0 A Full Speed Full Speed
1 B 0.25 6.4 0.50 12.7
2 C 0.30 7.6 0.55 14.0
3 D 0.35 8.9 0.60 15.2
4 E 0.40 10.2 0.65 16.5
5 F 0.45 11.4 0.70 17.8
6 G 0.50 12.7 0.75 19.1
7 H 0.55 14.0 0.80 20.3
8 I 0.60 15.2 0.85 21.6
9 J 0.65 16.5 0.90 22.8
10 K 0.70 17.8 0.95 24.0
11 L 0.75 19.0 1.00 25.4
12 M 0.80 20.3 1.10 27.0
13 N 0.85 21.6 1.20 30.0
14 O 0.90 22.9 1.30 33.0
15 P 0.95 24.1 1.40 36.0
4. Turn Ignition key switch OFF and install overlay decal on Diagnostic ACE.
INPUT – HOC Selector
Using the Diagnostic ACE (RM 5100-D/5300-D) Page 18