Honda CBR650F Service Manual page 339

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ANTI-LOCK BRAKE SYSTEM (ABS; CBR650FA, CB650FA)
SERVICE INFORMATION
ANTI-LOCK BRAKE SYSTEM (ABS; CBR650FA, CB650FA)
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.
• Spilling brake fluid will severely damage plastic parts and painted surfaces. It is also harmful to some rubber parts.
• This section covers service of the Anti-lock Brake System (ABS). For other service (conventional brake) of the brake system,
see Hydraulic Brake section (page 18-2).
• The ABS control unit is integrated in the modulator. Do not disassemble the ABS modulator. Replace the ABS modulator as an
assembly when the it is faulty.
• The ABS control unit performs pre-start self-diagnosis to check whether the ABS functions normally until the vehicle speed
reaches 10 km/h (6 mph). After pre-start self-diagnosis, the ABS control unit monitors the ABS functions and vehicle running
condition constantly until the ignition switch is turned OFF (ordinary self-diagnosis).
• 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.
• Read "ABS Troubleshooting Information" carefully, inspect and troubleshoot the ABS system according to the troubleshooting
flow chart. Observe each step of the procedures one by one. Write down the DTC 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 DTC and perform the pre-start self-diagnosis to be sure that the ABS indicator is operating
normally (page 19-4).
• 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, be sure to check the air gap (page 19-21).
• The following color codes are used throughout this section.
Bl = Black G = Green
Br = Brown Gr = Gray
Bu = Blue Lb = Light Blue
SYSTEM LOCATION
DLC
19-2
Lg = Light Green R = Red
O = Orange V = Violet
P = Pink W = White
ABS MODULATOR
REAR WHEEL SPEED SENSOR
Y = Yellow
FRONT WHEEL SPEED SENSOR