Yamaha MT-09 2021 Service Manual page 654

3. Wire harness continuity.
• Disconnect the ECU coupler "1", IMU coupler "3" and ignition fuse 2 "4".
• Remove the joint coupler cap "2".
• Open circuit check
Between ECU coupler "1" and joint coupler "2"
Between joint coupler "2" and IMU coupler "3"
Between ECU coupler "1" and ground
Between ignition fuse 2 holder "4" and IMU cou-
pler "3"
4
2
L/W W L/W W
B B/L B B B B B
*. MTN890
**. MTN890D
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", then to "OFF", and back to "ON".
c. 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 and IMU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-4.
3
B/W L/W L/B R/W
B B L/B L/B Y/B Y/B
B/L L/R L/R L/R L/R
blue/white–blue/white
blue/black–blue/black
blue/white–blue/white
blue/black–blue/black
black/white–ground
red/white–red/white
*
1
L/B Y/L
L/W B/Y
L/Y L/W
**
1
L/B Y/L
L/W B/Y
L/Y L/W
9-224
Lg/L P/W P V L L Gy
G/L Gy/G Br/W B/L B/L
G/W G/W W/G W/Y
O/W Lg/L P/W P V L L Gy
Br/L G/L Gy/G Br/W B/L B/L
Lg/B G/W G/W W/G W/Y
P1600