Yamaha YZF-R1 Series Service Manual page 659

3. Wire harness continuity.
• Disconnect the EXUP servo motor coupler "1" and ECU coupler "2".
• Open circuit check
Between EXUP servo motor coupler and ECU cou-
pler
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, and complete the service.
NO
→ Go to "Short circuit check".
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between EXUP servo motor coupler "1" and ground
Lines short circuit check "B"
EXUP servo motor coupler
ECU coupler "2"
black/green–black/green
black/red–black/red
2
1
L/Y L Y/B R/W
W W L/G B/R
B/G B B/G
B/L B B/Y W/Y
black/green–ground
black/red–ground
black/green–any other coupler terminal
black/red–any other coupler terminal
black/green–any other coupler terminal
black/red–any other coupler terminal
9-162
P0475, P0476, P048B
L W/Y B/L
G B/G B/R