Checking The Starter Relay; Checking The Diodes - Yamaha YZF-R7 Owner's Service Manual

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1
Br
L/W
2
3
L/W
4 L/Y
ELECTRIC STARTING SYSTEM

CHECKING THE STARTER RELAY

• Disconnect the starter relay from the cou-
pler.
• Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the starter relay coupler as
shown.
Battery positive terminal → brown 1
Battery negative terminal →
Tester positive probe → red 3
Tester negative probe → black 4
• Does the starter relay have continuity
between red and black?
Yes → Good.
No → Replace.

CHECKING THE DIODES

• Remove the diodes from the couplers.
• Connect the pocket tester (Ω × 1) to the
diode as show.
• Check the diodes for continuity.
Tester positive probe →
Tester negative probe →
Tester positive probe →
Tester negative probe →
Tester positive probe →
Tester negative probe →
Tester positive probe →
Tester negative probe →
NOTE:
When you switch the tester's positive and
negative probes, the readings in the above
chart will be reversed.
• Are the tester readings correct?
Yes → Good.
No → Replace the defective diode(-s).
8 - 15
–
ELEC
blue/white 2
brown 1
blue/white 2
Continu-
ity
blue/white 3
blue/yellow 4
blue/white 2
brown 1
No conti-
nuity
blue/yellow 4
blue/white 3
+