Honda SH300I 2006, Manual

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ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
18-4
SERVICE INFORMATION
GENERAL
• This section covers service of the Anti-lock Brake System (ABS; SH300A/AII/AIII). For conventional brake service, refer to
section 17.
• Pre-start self-diagnosis starts when the ignition switch is turned "ON". ABS modulator control unit receives signals and
detects if the ABS system functions normally. Pre-start self-diagnosis is complete by when the vehicle speed goes to 10
km/h (6 mph) approximately. The ABS system and the vehicle running condition are monitored constantly after pre-
start self-diagnosis until the ignition switch is turned "OFF".
• When the ABS control unit detects a problem, it stops the ABS function and switches back to the conventional brake
operation, and the ABS indicator blinks or stays on. Take care during the test ride.
• Troubles not resulting from a faulty ABS (e.g. brake disc squeak, unevenly worn brake pad) cannot be recognized by the
ABS diagnosis system.
• When the ABS modulator control unit detects a problem, the ABS indicator blinks to notify the rider of the problem. To
detect the faulty part, retrieve the problem code by shorting the service check connector terminals.
• Read "Before Starting Troubleshooting" carefully, inspect and troubleshoot the ABS system according to the Diagnostic
Troubleshooting flow chart. Observe each step of the procedures one by one. Write down the problem code and proba-
ble faulty part before starting diagnosis and troubleshooting.
• 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, erase the problem code when diagnostic troubleshooting is com-
plete, test ride the scooter above 30 km/h (18 mph) and check the other problem code by retrieving the self-diagnosis
system.
• When the wheel speed sensor and/or pulser ring is replaced, check the clearance (air gap) between both components.
• The ABS control unit (ECU) is mounted on the modulator (the modulator with the built-in ECU). Do not disassemble the
ABS modulator. Replace the ABS modulator as an assembly when it is faulty.
• The ABS modulator may be damaged if dropped. Also if a connector is disconnected when current is flowing, the exces-
sive voltage may damage the control unit. Always turn off the ignition switch before servicing.
• Be careful not to damage the wheel speed sensor and pulser ring when removing and installing the wheel.
• The following color codes are used throughout this section.
TORQUE VALUES
Bu = Blue G = Green Lg = Light Green R = Red
Bl = Black Gr = Gray O = Orange W = White
Br = Brown Lb = Light Blue P = Pink Y = Yellow
Brake pipe joint nut 14 N·m (1.4 kgf·m, 10 lbf·ft) Apply brake fluid to the threads.
Sensor protector socket bolt 10 N·m (1.0 kgf·m, 7 lbf·ft) ALOC bolt; replace with a new one.