Yamaha XVS950CU 2014, Service Manual

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ABS (ANTI-LOCK BRAKE SYSTEM) (for ABS models)
7-118
WARNING
EWA1XC1001
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 “[C-1] FINAL
CHECK” on page 7-145.)
EAS27830
[A] CHECKING THE ABS WARNING LIGHT
Turn the main switch to “ON”. (Do not start the engine.)
1. The ABS warning light does not come on.
• Only the ABS warning light fails to come on. [A-1]
• The ABS warning light and all other indicator lights fail to come on. [A-2]
2. The ABS warning light comes on. [A-3]
EAS1XC1005
[A-1] ONLY THE ABS WARNING LIGHT FAILS TO COME ON
1. Check for a short circuit to the ground between the green/black terminal of the ABS ECU coupler
and green/black terminal of the meter assembly.
• If there is short circuit to the ground, the wire harness is defective. Replace the wire harness.
2. Disconnect the ABS ECU coupler and check that the ABS warning light comes on when the main
switch is turned to “ON”.
• If the ABS warning light does not come on, the meter assembly circuit (including the ABS warning
light [LED]) is defective. Replace the meter assembly.
• If the ABS warning light comes on, the ABS ECU is defective. Replace the hydraulic unit assembly.
EAS1XC1006
[A-2] THE ABS WARNING LIGHT AND ALL OTHER INDICATOR LIGHTS FAIL TO COME ON
1. Main switch
• Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES” on page 7-151.
• If there is no continuity, replace the main switch/immobilizer unit.
2. Battery
• Check the condition of the battery.
Refer to “CHECKING AND CHARGING THE BATTERY” on page 7-156.
• If the battery is defective, clean the battery terminals and recharge it, or replace the battery.
3. Main fuse
• Check the fuse for continuity.
Refer to “CHECKING THE FUSES” on page 7-155.
• If the main fuse is blown, replace the fuse.
4. Circuit
• Check the meter assembly circuit.
Refer to “CIRCUIT DIAGRAM” on page 7-109.
• If the meter assembly circuit is open, replace the wire harness.
EAS1XC1007
[A-3] THE ABS WARNING LIGHT COMES ON
Connect the Yamaha diagnostic tool to the ABS test coupler. If the Yamaha diagnostic tool cannot com-
municate with the vehicle, perform the following steps. For information about connecting the Yamaha
diagnostic tool, refer to “[B-2] DIAGNOSIS USING THE FAULT CODES” on page 7-119.
1. Yamaha diagnostic tool
• Check if the Yamaha diagnostic tool is connected correctly.
Refer to “[B-2] DIAGNOSIS USING THE FAULT CODES” on page 7-119
2. ABS ECU fuse
• Check the ABS ECU fuse for continuity.
Refer to “CHECKING THE FUSES” on page 7-155.
• If the ABS ECU fuse is blown, replace the fuse.