Yamaha MT-09 2021 Service Manual page 572

Is the coupler condition normal?
YES
→ Go to step 4.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code 37)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to step 4.
4. Wire harness continuity.
• Disconnect the injector #2 coupler "1", ECU coupler "2" and relay unit coupler "3".
• Open circuit check
Between injector #2 coupler "1" and ECU cou-
pler "2"
Between injector #2 coupler "1" and relay unit
coupler "3"
2
Y/R
Lg/R
R/L
R/G
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code 37)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to "Short circuit check".
• Short circuit check
P/B O/G Gy/R O
L/B G/B R/B B
G/Y B
Y/R Y/B L/W R/L B/W B/W
green/black–green/black
red/blue–red
1
G/B R/L
3
Br W
9-142
R L/W R
W L/W R L/B L
Sb B Sb/W
P0202