Yamaha XP500 Service Manual page 325

ANTI-LOCK BRAKE SYSTEM (XP500A)
• [D-6-6] Delete function test
1. Place the vehicle on the centerstand.
2. Set the main switch to "OFF".
3. Connect the test coupler adapter to the test
coupler.
4. Set the main switch to "ON".
5. Check:
• ECU (ABS) voltage
Connect the pocket tester (DC 20 V) to the
ECU (ABS) coupler.
Positive tester probe → brown/white 1
Negative tester probe → black/white 2
Battery voltage
Higher than 12.8 V
Lower than 12.8 V → Charge or replace the
battery.
6. Check:
• ECU (ABS)-to-start-switch-lead continuity
Connect the pocket tester (Ω × 1) to the
ECU (ABS) coupler and start switch cou-
pler.
Positive tester probe →
Negative tester probe →
No continuity → Replace or repair the wire
harness.
7. Check:
• ECU (ABS) voltage
Connect the pocket tester (DC 20 V) to the
ECU (ABS) coupler.
Positive tester probe → green/white 1
Negative tester probe → black/white 2
Push the start switch.
Start switch ON: less than 1 V
Start switch OFF: more than 12 V
Out of specification → Replace the handle-
bar switch.
8. If the above-mentioned checks are within
specification, replace the ECU (ABS).
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CHAS
green/white 1 (ECU)
green/white 2 (start switch)