Yamaha VMAX 2009 Service Manual page 225

5. Connect the test coupler adapter "1" to the
ABS test coupler "2".
Test coupler adapter
90890-03149
2
1
6. Turn the main switch to "ON" while operating
the brake lever and the brake pedal simulta-
neously.
TIP
Do not push the start switch when turning the
main switch to "ON", otherwise the operation
test will not begin.
7. Check:
• Hydraulic unit operation
When the main switch is turned to "ON", a
single pulse will be generated in the brake le-
ver "1", brake pedal "2", and again in the
brake lever "1", in this order.
ABS (ANTI-LOCK BRAKE SYSTEM)
1
ECA2S31028
NOTICE
• Check that the pulse is felt in the brake le-
ver, brake pedal, and again in the brake le-
ver, in this order.
• If the pulse is felt in the brake pedal before
it is felt in the brake lever, check that the
brake hoses and brake pipes are connected
correctly to the hydraulic unit assembly.
• If the pulse is hardly felt in either the brake
lever or brake pedal, check that the brake
hoses and brake pipes are connected cor-
rectly to the hydraulic unit assembly.
• If the operation of the hydraulic unit is normal,
delete all of the fault codes.
Hydraulic unit operation test 2
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
1. Place the vehicle on a suitable stand.
2. Turn the main switch to "OFF".
3. Remove:
• Left side cover
• Top cover
Refer to "GENERAL CHASSIS" on page 4-1.
4. 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 hydraulic
unit operation test 2.
• If the battery voltage is lower than 10 V, the
ABS warning light comes on and the ABS does
not operate.
4-60
2