Yamaha YZF-R6 99 Service Manual page 389

EB812010
TROUBLESHOOTING
The tachometer starts to display the self-
diagnosis sequence.
Check:
1. throttle position sensor
2. fuel level indicator light
NOTE:
S Before troubleshooting, remove the following
part(-s):
1) rider seat
2) fuel tank
3) air filter case
4) right side cowling inner panel
5) right side cowling
S Troubleshoot with the following special
tool(-s).
Pocket tester
90890-03112
EB812020
1. Throttle position sensor
CIRCUIT DIAGRAM
Throttle position sensor
13
CDI unit
14
SELF-DIAGNOSIS
1. Wire harness
S Check the wire harness for continuity.
Refer to "CIRCUIT DIAGRAM".
S Is the wire harness OK?
YES
EB812401
2. Throttle position sensor
S Check the throttle position sensor for conti-
nuity.
Refer to "CHECKING AND ADJUSTING
THE THROTTLE POSITION SENSOR" in
chapter 6.
S Is the throttle position sensor OK?
YES
Replace the CDI unit.
8-55
ELEC
NO
Repair or replace the
wire harness.
NO
Replace the throttle
position sensor.