Page 491 - 2019 SHOP MANUAL CRF1000/A/D

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ANTI-LOCK BRAKE SYSTEM (ABS) (CRF1000A/D)
ABS TROUBLESHOOTING INFORMATION

SYSTEM DESCRIPTION
SUMMARY OF ABS PRE-START SELF-DIAGNOSIS SYSTEM
The ABS pre-start self-diagnosis system diagnoses the electrical system as well as the operating status of the modulator. When
there is any abnormality, the problem and the associated part can be detected by reading the Diagnostic Trouble Code (DTC).
When the motorcycle is running, pulse signals generated at the front and rear wheel speed sensors are sent to the ABS control unit.
When the motorcycle speed reaches approximately 6 km/h (4 mph), the ABS control unit operates the pump motor to check it.
When the motorcycle speed reaches 10 km/h (6 mph), the ABS control unit turns off the ABS indicator if the system is normal and
the pre-start self-diagnosis is completed.
If any problem is detected, the ABS indicator brinks or comes on and stays on to notify the rider of the problem.
The ordinary self-diagnosis is also made while the motorcycle is running after the pre-start diagnosis is completed. When the ABS
indicator brinks or stays on, the cause of the problem can be identified by retrieving the DTC (page 20-6).
If the ABS indicators do not come on when the ignition switch is turned ON, or the indicator stays on after the pre-start self-
diagnosis is completed although the ABS is normal, the indicator circuit may be faulty. Follow the troubleshooting (page 20-10).

Pre-start serf-diagnosis when the system is normal:

IGNITION ON
SWITCH OFF

Running
ENGINE Start
Stop

MOTORCYCLE 6 km/h (4 mph) or above
SPEED 0

PUMP ON
MOTOR OFF

ABS ON
INDICATOR OFF

REAR ON 2 sec. Pre-start serf-diagnosis is
completed at 10 km/h (6 mph)
ABS OFF
INDICATOR OFF

CPU completion of
the initial settings

PRE-START SELF-DIAGNOSIS PROCEDURE (Daily check)
1. Turn the ignition switch ON and engine stop switch " ".
2. Make sure the ABS indicator and rear ABS off indicator comes on.
3. After CPU initial settings completes, the rear ABS off indicator will go off after approximately 2 seconds if system is normal.
4. Start the engine.
5. Ride the motorcycle and increase the motorcycle speed to approximately 10 km/h (6 mph).
6. The ABS is normal if the ABS indicator goes off.

MCS INFORMATION
Refer to the PGM-FI system (page 4-6).

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