Hydraulic Unit Operation Tests - Yamaha N MAX GPD150-A 2015 Service Manual

• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
ECA13540
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
6. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-12.
7. Check the operation of the hydraulic unit ac-
cording to the brake levers response. (Refer
to "HYDRAULIC UNIT OPERATION TESTS"
on page 4-65.)
ECA14550
NOTICE
Always check the operation of the hydraulic
unit according to the brake lever response.
8. Delete the fault codes. (Refer to "[B-3] DE-
LETING THE FAULT CODES" on page
8-90.)
9. Perform a trial run. (Refer to "CHECKING
THE ABS WARNING LIGHT" on page 4-68.)
EAS30201

HYDRAULIC UNIT OPERATION TESTS

The reaction-force pulsating action generated in
the brake levers when the ABS is activated can
be tested when the vehicle is stopped.
The hydraulic unit operation can be tested using
the following two methods.
• Brake line routing confirmation: this test
checks the function of the ABS after the sys-
tem was disassembled, adjusted, or serviced.
• ABS reaction-force confirmation: this test gen-
erates the same reaction-force pulsating action
that is generated in the front brake lever and
rear brake lever when the ABS is front activat-
ed.
Brake line routing confirmation
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP
• For the brake line routing confirmation, use the
diagnosis mode of the Yamaha diagnostic tool.
ABS (ANTI-LOCK BRAKE SYSTEM)
• Before performing the brake line routing confir-
mation, make sure that no malfunctions have
been detected in the ABS ECU and that the
wheels are not rotating.
1. Place the vehicle on a center stand.
2. Turn the main switch to "OFF".
3. Open the seat.
4. Remove:
• Battery cover
Refer to "GENERAL CHASSIS (1)" on page
4-1.
5. Check:
• Battery voltage
Lower than 12.8 V → Charge or replace the
battery.
Battery voltage
Higher than 12.8 V
TIP
If the battery voltage is lower than 12.8 V, charge
the battery, and then perform brake line routing
confirmation.
6. Removing the protective cap "1", and then
connect the Yamaha diagnostic tool to the
Yamaha diagnostic tool coupler (4P).
Yamaha diagnostic tool
90890-03231
4-65
1