Yamaha XP500 Service Manual page 315

Operation of solenoid relay
Terminal number
Normal
condition
Connect the
battery to ter-
minals 7 and
8
ANTI-LOCK BRAKE SYSTEM (XP500A)
Continuity
• [D-2] Maintenance of the ABS fail-safe
relay
CHECKING THE FAIL-SAFE RELAY
1. Check:
• solenoid relay for continuity
Connect the pocket tester (Ω × 1) to the ter-
minals.
Check for continuity between terminals 3
and 4 of the solenoid relay.
Positive tester probe → Terminal 3
Negative tester probe → Terminal 4
Tester reading is "∞". → Replace the fail-
safe relay.
• Check for continuity between terminals 7
and 8 of the solenoid relay.
Positive tester probe → Terminal 7
Negative tester probe → Terminal 8
Solenoid relay resistance
150 ~ 450 Ω
Tester reading is "∞". → Replace the fail-
safe relay.
• Connect the positive battery terminal to ter-
minal 7 and the negative battery terminal
to terminal 8, and then check for continuity
between terminals 4 and 5 of the solenoid
relay.
Positive tester probe → Terminal 4
Negative tester probe → Terminal 5
Tester reading is "∞". → Replace the fail-
safe relay.
CAUTION:
_
When connecting the solenoid relay and
battery terminals, be careful not to short-
circuit the positive and negative battery ter-
minals.
a Fail-safe relay
b ABS motor relay
c Solenoid relay
4 - 117
CHAS