Yamaha YZF-R1 Series Service Manual page 700

• 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 air induction system solenoid coupler "1"
and ground
Lines short circuit check "B"
Air induction system solenoid coupler
ECU coupler "2"
A
1
Br/R R/W
Is resistance ∞ Ω?
YES
→ Go to step 4.
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 6, and complete the service.
NO
→ Start the engine and check the status of the DTC.
Is it in the "Recovered" condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to step 4.
TIP
Check that the start/engine stop switch is turned to "ON" then.
4. Defective air induction system solenoid.
• Check the air induction system solenoid.
Refer to "CHECKING THE AIR INDUCTION SYSTEM SOLENOID" on page 8-49.
• Turn the main switch to "ON", and then check the condition of the DTC using the malfunction mode
of the YDT.
brown/red–ground
red/white–ground
brown/red–any other coupler terminal
red/white–any other coupler terminal
brown/red–any other coupler terminal
B
1
Br/R R/W
9-203
P1400
2
Y/R P/W P/B O/G Gy/G O Gy/R
Lg/R L/R L/B O/B R/B G/B B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W B/W