Yamaha XT1200Z(Z) 2010, Service Manual

Page: 544 / 616

ABS (ANTI-LOCK BRAKE SYSTEM)
8-95
EAS27770
MAINTENANCE OF THE ABS ECU
Checking the ABS ECU
1. Check:
• Terminals “1” of the ABS ECU
Cracks/damage
→
Replace the hydraulic unit
assembly and the brake pipes that are con-
nected to the assembly as a set.
• Terminals “2” of the ABS ECU coupler
Defective connections/contamination/discon-
nections
→
Repair or clean.
TIP
If the ABS ECU coupler is clogged with mud or
dirt, clean with compressed air.
EAS27790
ABS TROUBLESHOOTING OUTLINE
This section describes the troubleshooting for the ABS in detail. Read this service manual carefully and
make sure you fully understand the information provided before repairing any malfunctions or perform-
ing service.
The ABS ECU (electronic control unit) has a self-diagnosis function. When failures occur in the system,
the ABS warning light on the meter assembly indicates a malfunction.
The following troubleshooting describes the problem identification and service method according to the
fault codes indicated by the ABS warning light flash pattern. For troubleshooting items other than the
following items, follow the normal service method.
WARNING
EWA23P1017
When maintenance or checks have been performed on components related to the ABS, be sure
to perform a final check before delivering the vehicle to the customer. (Refer to “[D-3] FINAL
CHECK” on page 8-131.)
ABS operation when the ABS warning light comes on
1. ABS is canceled and the braking reverts to normal braking. Futhermore, the braking performance of
the unified brake system could be reduced.
• A malfunction was detected using the ABS self-diagnosis function.
2. The ABS warning light comes on, and then goes off when starting the engine
→
ABS and UBS op-
eration is normal.
• The ABS warning light comes on for 2 seconds, and then goes off every time the main switch is
set to “ON”.
• The ABS warning light comes on while the start switch is being pushed.
3. The ABS warning light flashes
→
ABS and UBS operation is normal.
• Refer to “BASIC INSTRUCTIONS FOR TROUBLESHOOTING” on page 8-96.
Self-diagnosis and servicing
The ABS ECU has a self-diagnosis function. By utilizing this function, quick problem identification and
service are possible. Previous malfunctions can be checked since the ABS ECU also stores the mal-
function history.
The ABS warning light flash pattern indicates all the fault codes recorded in the ABS ECU.
Note all of the indicated fault codes if more than two fault codes are stored in the memory. When the
service is finished, check the normal operation of the vehicle, and then delete the fault code(s). (Refer
to “[D-3] FINAL CHECK” on page 8-131.) By deleting the fault codes stored in the ABS ECU memory,
it is possible to pursue the cause correctly if another malfunction occurs.
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