Yamaha YZF-R1 Series Service Manual page 676

Is the coupler condition normal?
YES
→ Go to step 17.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D21)
When the clutch lever is released with the transmission in gear and when the
sidestand is retracted
When the clutch lever is squeezed with the transmission in gear and when the
sidestand is retracted
Is it correct indication?
YES
→ Go to step 21.
NO
→ Go to step 17.
17.Connection of ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
→ Go to step 18.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D21)
When the clutch lever is released with the transmission in gear and when the
sidestand is retracted
When the clutch lever is squeezed with the transmission in gear and when the
sidestand is retracted
Is it correct indication?
YES
→ Go to step 21.
NO
→ Go to step 18.
18.Wire harness continuity.
• Disconnect the ECU coupler "2", relay unit coupler "1" and clutch switch coupler "3".
• Open circuit check
Between ECU coupler and relay unit coupler
Between clutch switch coupler and relay unit coupler
black/yellow–black/yellow
black/yellow–black/yellow
blue/yellow–blue/yellow
9-179
P0500 (FI), P1500
OFF
ON
OFF
ON