Yamaha YZF-R1 Series Service Manual page 672

→ Go to step 21.
NO
→ Go to step 7.
7. Malfunction in ABS ECU.
• Replace the ABS ECU and go to step 21.
8. Connection of neutral switch 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 9.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D21)
When the transmission is in neutral
When the transmission is in gear with the clutch lever released
Is it correct indication?
YES
→ Go to step 21.
NO
→ Go to step 9.
9. 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 10.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D21)
When the transmission is in neutral
When the transmission is in gear with the clutch lever released
Is it correct indication?
YES
→ Go to step 21.
NO
→ Go to step 10.
10.Wire harness continuity.
• Disconnect the relay unit coupler "1", ECU coupler "2" and neutral switch coupler "3".
• Open circuit check
Between relay unit coupler and ECU coupler black/yellow–black/yellow
9-175
P0500 (FI), P1500
ON
OFF
ON
OFF