Yamaha YZF-R1S Service Manual page 406

EAS00753
12. Starting circuit cut-off relay (diode)
S Disconnect the starting circuit cut-off relay
coupler from the wire harness.
S Connect the pocket tester (Ω
starting circuit cut-off relay coupler as
shown.
S Check the starting circuit cut-off relay for
continuity.
Positive tester probe !
blue/yellow
Negative tester probe !
sky blue
Positive tester probe !
blue/yellow
Negative tester probe !
blue/black
Positive tester probe !
sky blue
Negative tester probe !
blue/yellow
Positive tester probe !
blue/black
Negative tester probe !
blue/yellow
NOTE:
When you switch the positive and negative
tester probes, the readings in the above chart
will be reversed.
S Are the tester readings correct?
YES
1) to the
1
2
Continuity
1
3
2
1
No
continuity
3
1
NO
Replace the starting
circuit cut-off relay.
8-13
IGNITION SYSTEM
13. Lean angle cut-off switch
S Check the lean angle cut-off switch.
Refer to "FUEL INJECTION SYSTEM" in
chapter 7.
S Is the lean angle cut-off switch OK?
YES
EAS00754
14. Wiring
S Check the entire ignition system's wiring.
Refer to "CIRCUIT DIAGRAM".
S Is the ignition system's wiring properly con-
nected and without defects?
YES
Replace the ECU.
ELEC
NO
Replace the lean
angle cut-off switch.
NO
Properly connect or
repair the ignition
system's wiring.