Yamaha YZF-R1 Series Service Manual page 625

→ Go to step 4.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D36)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to step 4.
4. Wire harness continuity.
• Disconnect the primary injector #1 coupler "1", ECU coupler "2" and relay unit coupler "3"
• Open circuit check
Between primary injector #1 coupler and ECU cou-
pler
Between primary injector #1 coupler and relay unit
coupler
2
Y/R P/W P/B O/G
Lg/R L/R L/B O/B R/B
R/L G/Y Br/R Br/Y Br/B W/L
R/G Y/B L/W Y/L Sb
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code D36)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to "Short circuit check".
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between primary injector #1 coupler "1" and ground
Lines short circuit check "B"
Primary injector #1 coupler
1
R/LR/B
Gy/G O Gy/R
G/B B
Sb/W B
R/L B/W B/W
9-128
red/black–red/black
red/blue–red/blue
3
Br/W L/W
L/R L/W R/W L/B L/Y
red/black–ground
red/blue–ground
red/black–any other coupler terminal
red/blue–any other coupler terminal
P0201
R/W L R/L
Sb B/Y Sb/W