Honda NC700 2012, Service Manual

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20-4
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ANTI-LOCK BRAKE SYSTEM (ABS)
SERVICE INFORMATION
GENERAL
The ABS modulator may be damaged if dropped. Also if a connector is disconnected when current is flowing, the excessive voltage
may damage the control unit. Always turn off the ignition switch before servicing.
• This section covers service of the Anti-lock Brake System (ABS). Refer to information for the combi brake system servicing
(page 19-5).
• Pre-start self-diagnosis starts when the ignition switch is turned ON. The ABS modulator control unit receives signals and
detects whether the ABS system functions normally. Pre-start self-diagnosis starts when the vehicle speed goes above 6 km/h
(4 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 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 DLC terminals.
• When the ABS control unit detects a problem, it stops the ABS function and switches back to the combi brake operation, and the
ABS indicator blinks or stays on. Take care during the test ride.
• Read "ABS TROUBLESHOOTING INFORMATION" 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
probable faulty part before starting diagnosis and troubleshooting.
• Use a fully charged battery. Do not diagnose with a charger connected to the battery.
• After troubleshooting, erase the problem code and perform the pre-start self-diagnosis to be sure that the ABS indicator is
operating normally.
• 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 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 the it is faulty.
• 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
Bl = Black Bu = Blue O = Orange R = Red W = White
Br = Brown G = Green P = Pink V = Violet Y = Yellow
ITEM Q'TY
THREAD TORQUE
REMARKS
DIA. (mm) N·m (kgf·m, lbf·ft)
Step holder mounting socket bolt 4 8 32 (3.3, 24)
Brake pipe joint nut 14 10 14 (1.4, 10) Apply brake fluid to the threads and
sliding surface.
PCV mounting bolt 2 6 12 (1.2, 9)
Delay valve mounting bolt 2 6 12 (1.2, 9)