Yamaha XT1200Z(Z) 2010 Service Manual page 576

Fault code No. 74
Order Item/components and probable
cause
1 Brake master cylinder and brake cali-
per
2 Brake fluid
3 Brake lines
4 Hydraulic unit assembly
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom Difference between the actual hydraulic pres-
sure and the hydraulic pressure required by the
unified brake system is abnormal.
Check or maintenance job
• Check that the hydraulic pres-
sure is correctly transmitted to
the brake caliper when the
brake pedal is operated and
that the pressure decreases
when the pedal is released.
• Visually check the brake fluid in
the brake fluid reservoir for wa-
ter, foreign materials, solidifica-
tion, and contamination.
• Check for air in the brake lines.
• Check the brake lines for kinks
and deterioration (particularly
between the hydraulic unit and
the rear brake caliper).
EWA23P1020
Only use genuine Yamaha
parts. Using other brake pipes,
hoses and union bolts may
close the brake lines.
• Check that the connections of
the brake lines from the brake
master cylinder to the hydraulic
unit are correct.
See WARNING and TIP.
If the malfunction is not corrected
after checking items (1) to (3), re-
place the hydraulic unit assembly.
Be sure to connect the brake
hoses, hydraulic unit brake pipe
joint, brake pipes, and coupler
correctly and securely. Check the
hydraulic unit operation.
Refer to "HYDRAULIC UNIT OP-
ERATION TESTS" on page 4-71.
8-127
WARNING
2
Reinstatement
confirmation
method
Perform hy-
draulic unit op-
eration test 1
and check that
the operation of
the hydraulic
unit is normal.
1