Yamaha YZF-R1 Series Service Manual page 666

• Open circuit check
Between EXUP servo motor coupler and ECU cou-
pler
2
L/Y L
W W L/G
B/G B
B/L B B/Y
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 6, 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"
1
Y/B R/W
L W/Y B/L
B/R
G B/G B/R
B/G
W/Y
blue–blue
white/yellow–white/yellow
black/blue–black/blue
2
L/B
L/W B/Y
L/Y L/W
white/yellow–ground
blue–ground
white/yellow–any other coupler terminal
blue–any other coupler terminal
black/blue–any other coupler terminal
white/yellow–any other coupler terminal
blue–any other coupler terminal
black/blue–any other coupler terminal
9-169
P048D, P048E
P/W P V L L/R Gy
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L