Page 488 - 2019 SHOP MANUAL CRF1000/A/D

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ANTI-LOCK BRAKE SYSTEM (ABS) (CRF1000A/D)
SERVICE INFORMATION
ANTI-LOCK BRAKE SYSTEM (ABS) (CRF1000A/D)
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.
• The ABS control unit is integrated in the ABS 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 motorcycle speed
reaches 10 km/h (6 mph). After pre-start self-diagnosis, the ABS control unit monitors the ABS functions and motorcycle 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, switches back to the conventional brake operation, and
turns on or blinks the ABS indicator. Take care during the test-ride.
• When the ABS control unit detects a problem in the rear ABS off indicator circuit, it stops the rear ABS off mode function,
switches back to the normal ABS operation, and turns on or blinks the ABS indicator and goes off rear ABS off indicator.
• Read "ABS TROUBLESHOOTING INFORMATION" carefully, inspect and troubleshoot the ABS according to the diagnostic
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 test-ride the motorcycle to check that the ABS indicator operates normally during pre-
start self-diagnosis (page 20-5).
• Problems not caused by the faulty ABS (e.g. brake disc squeak, unevenly worn brake pad) cannot be detected by the ABS
diagnosis system.
• Before wheel speed sensor servicing, check the following:
– Iron or other magnetic deposits between the pulser ring and wheel speed sensor
– Pulser ring slots for obstructions
– Installation condition of the pulser ring or wheel speed sensor for looseness
– Pulser ring and sensor tip for deformation or damage
• Be careful not to damage the pulser ring when removing and installing the wheel.
• For pulser ring service:
– Front pulser ring (page 17-12)
– Rear pulser ring (page 18-5)
• The following color codes are used throughout this section.
Bl = Black Bu = Blue Br = Brown G = Green O = Orange P = Pink
R = Red V = Violet W = White Y = Yellow

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