Yamaha YZF-R1 Series Service Manual page 673

Between relay unit coupler and neutral switch cou-
pler
1
3
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code D21)
When the transmission is in neutral
When the transmission is in gear with the clutch lever released
Is it correct indication?
YES
→ Go to step 21.
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 relay unit coupler "1" and ground
Lines short circuit check "B"
Relay unit coupler
ECU coupler "2"
Neutral switch coupler "3"
Br/W L/W R/W L R/L
L/R L/W R/W L/B L/Y Sb B/Y Sb/W
9-176
sky blue–sky blue
2
L/B
L/W B/Y
L/Y L/W
black/yellow–ground
sky blue–ground
black/yellow–any other coupler terminal
sky blue–any other coupler terminal
black/yellow–any other coupler terminal
sky blue–any other coupler terminal
P0500 (FI), P1500
P/W P V L L/R Gy
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L
ON
OFF