Yamaha YZF-R1 Series Service Manual page 569

Between joint coupler and IMU coupler
Between IMU coupler and ignition fuse holder
Between IMU coupler and ECU coupler
4
2
*. Joint coupler for YZF-R1
**. Joint coupler for YZF-R1M
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 ECU coupler "1" and ground
Between IMU coupler "3" and ground
Lines short circuit check "B"
ECU coupler
*
L/W L/W L/W L/W L/W L/W L/B L/B L/B L/B L/B L/B
**
L/W L/W L/W L/W L/W L/W L/W
L/B L/B L/B L/B L/B L/B L/B
blue/white–blue/white
blue/black–blue/black
red/white–red/white
black/white–black/white
3
1
L/B
L/W
blue/white–ground
blue/black–ground
blue/white–ground
blue/black–ground
red/white–ground
blue/white–any other coupler terminal
blue/black–any other coupler terminal
9-72
C0520 (FI)
1
Y/R P/W P/B O/G Gy/G O Gy/R
Lg/R L/R L/B O/B R/B G/B B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W B/W
P/W P V L L/R Gy
Gy/G Br/W W W/B
B/Y B/L
L/Y L/W Gy/Y G/W G Gy/B W/L