Yamaha YZF-R1 Series Service Manual page 754

1
*. 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 "OFF" and back to "ON", and then check the condition of the DTC using the
malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Service is completed.
NO
→ Go to "Short circuit check".
• Short circuit check
TIP
Disconnect the SCU and IMU related connectors before checking.
Refer to "PARTS CONNECTED TO THE SCU (for YZF-R1M)" on page 9-3.
Ground short circuit check "A"
Between SCU coupler "1" and ground
Between IMU coupler "3" and ground
Lines short circuit check "B"
SCU coupler
Joint coupler "2"
IMU coupler
P/W G/R Y Br/W
P G Y/R Gy/G Gy B
L/B P/L G/B Y/G Gy/B Gy/R
L/W P/B G/L Y/B W W/R W/B W/G
2
*
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
9-257
3
blue/white–ground
blue/black–ground
blue/white–ground
blue/black–ground
blue/white–any other coupler terminal
blue/black–any other coupler terminal
blue/white–any other coupler terminal
blue/black–any other coupler terminal
blue/white–any other coupler terminal
blue/black–any other coupler terminal
U0125 (SCU)