Yamaha MT-09 2021 - Page 575

9-145
P0203
4. Wire harness continuity.
• Disconnect the injector #3 coupler “1”, ECU coupler “2” and relay unit coupler “3”
• Open circuit check
• Short circuit check
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 38)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to step 4.
Between injector #3 coupler “1” and ECU cou-
pler “2”
blue/black–blue/black
Between injector #3 coupler “1” and relay unit
coupler “3”
red/blue–red
Is resistance 0 Ω?
YES
→ Go to “Short circuit check”.
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code 38)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to “Short circuit check”.
L/B R/L
W
L/W R L/B LB Sb/W Sb
W
Br
L/W
RR
O Gy/RO/GP/BY/R
B
R/BG/BL/BLg/R
B
G/YR/L
B/WB/WR/LL/WY/BY/RR/G
3
2
1