Yamaha MT-09 2021 Service Manual page 666

Between ECU coupler "3" and joint coupler "2"
Between ECU coupler "3" and intake air pres-
sure sensor 2 coupler "1"
Between intake air pressure sensor 2 coupler
"1" and joint coupler "2"
1
B P L
2
L/W W L/W W B
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", 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 "REPLACING THE ECU (Engine Control Unit)" on page 8-56.
*
3
L/B Y/L P/W
L/W B/Y Gy/G
L/Y L/W
B L/B L/B Y/B Y/B
B/L L/R L/R L/R L/R
[P1607] black/blue–black/blue
[P1607] blue–blue
[P1606, P1607] pink–pink
[P1607] black–black
3
P V L L Gy
Br/W B/L B/L
G/W G/W W/G W/Y
9-236
P1606, P1607
**
L/B Y/L O/W Lg/L P/W P
L/W B/Y Br/L G/L Gy/G Br/W
L/Y L/W Lg/B G/W
V L L Gy
B/L B/L
G/W W/G W/Y