ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
18-10
ABS INDICATOR PROBLEM CODE INDEX
• The ABS indicator denotes the problem codes from 11 to 81. The indicator has two types of blinks, a long blink and
short blink. The long blink lasts for 1.3 seconds, the short blink lasts for 0.3 seconds.
• ABS control unit (ECU) can record only the first problem data detected while the ignition switch is turned "ON" until it is
turned "OFF" even when there are multiple failures. To detect possible multiple failures, erase the problem code when
diagnostic troubleshooting is complete, test ride the scooter above 30 km/h (18 mph) and check the other problem code
by retrieving the self diagnosis system (page 18-7).
• The ABS indicator might blink in the following cases. Correct the faulty part.
– Incorrect tire pressure.
– Tires not recommended for the scooter were installed (incorrect tire size).
– Deformation of the wheel or tire.
• The ABS indicator might blink while riding under the following conditions. This is temporary failure. Be sure to erase
the problem code (page 18-9) then, test ride the scooter above 30 km/h (18 mph) and check the problem code by retriev-
ing the self-diagnosis system (page 18-8). Ask the rider for the riding conditions in detail when the scooter is brought in
for inspection.
– The scooter has continuously run bumpy roads.
– The front wheel leaves the ground for a long time when riding (wheelie).
– Only either the front or rear wheel rotates.
– The ABS operates continuously.
– The ABS control unit has been disrupted by an extremely powerful radio wave (electromagnetic interference).
Problem Code Check Part/Symptoms
Detection
Probable faulty part
Reference
page
AB
–
ABS indicator does not come on • Indicator related wires 18-11
ABS indicator stays on after the
pre-start self-diagnosis proce-
dure is complete
18-12
11 Front wheel speed sensor O O • Wheel speed sensor or related wires 18-14
13 Rear wheel speed sensor O O 18-16
12 Front wheel speed sensor O • Wheel speed sensor or related wires
• Electromagnetic interference
18-14
14 Rear wheel speed sensor O 18-16
21 Front pulser ring O • Pulser ring or wheel speed sensor 18-14
23 Rear pulser ring O 18-16
31 Solenoid valve
OO
• Solenoid valve (modulator)
18-18
32
33
34
37
38
41 Front wheel lock O • Riding condition 18-14
42 Front wheel lock (Wheelie) O
43 Rear wheel lock O 18-16
51 Motor lock O O • Pump motor (modulator) or related
wires
18-18
52 Motor stuck off O O
53 Motor stuck on O O
54 Fail-safe relay
OO
• Fail-safe relay (modulator) or related
wires
18-19
61 Power circuit O O • Input voltage (too low) 18-21
62 Power circuit O O • Input voltage (too high)
71 Tire O • Tire size 18-22
81 CPU O O • ABS control unit (modulator) 18-22
(A) Pre-start self-diagnosis (page 18-7)
(B) Ordinary self-diagnosis: diagnoses while the scooter is running (after pre-start self-diagnosis)
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