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ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
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
ABS indicator does not come on
ABS indicator stays on after the
–
pre-start self-diagnosis proce-
dure is complete
11
Front wheel speed sensor
13
Rear wheel speed sensor
12
Front wheel speed sensor
14
Rear wheel speed sensor
21
Front pulser ring
23
Rear pulser ring
31
Solenoid valve
32
33
34
37
38
41
Front wheel lock
42
Front wheel lock (Wheelie)
43
Rear wheel lock
51
Motor lock
52
Motor stuck off
53
Motor stuck on
54
Fail-safe relay
61
Power circuit
62
Power circuit
71
Tire
81
CPU
(A) Pre-start self-diagnosis (page 18-7)
(B) Ordinary self-diagnosis: diagnoses while the scooter is running (after pre-start self-diagnosis)
18-10
Check Part/Symptoms
Detection
Probable faulty part
A
B
• Indicator related wires
O
O
• Wheel speed sensor or related wires
O
O
O
• Wheel speed sensor or related wires
• Electromagnetic interference
O
O
• Pulser ring or wheel speed sensor
O
• Solenoid valve (modulator)
O
O
O
• Riding condition
O
O
O
O
• Pump motor (modulator) or related
wires
O
O
O
O
• Fail-safe relay (modulator) or related
O
O
wires
O
O
• Input voltage (too low)
O
O
• Input voltage (too high)
O
• Tire size
O
O
• ABS control unit (modulator)
Reference
page
18-11
18-12
18-14
18-16
18-14
18-16
18-14
18-16
18-18
18-14
18-16
18-18
18-19
18-21
18-22
18-22
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Troubleshooting
