Yamaha MT-09 2021 Service Manual page 524

Is it in the "Recovered" condition?
YES
→ Go to step 6, and complete the service.
NO
→ Start the engine, and then check the condition of the DTC.
Is it in the "Recovered" condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to "Short circuit check".
TIP
For this check, also set the stop/run/start switch to "ON".
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-4.
Ground short circuit check "A"
Between O sensor coupler "1" and ground
2
Lines short circuit check "B"
O sensor coupler "1"
2
ECU coupler "2"
A
1
R P/B
Gy/G B/L
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 then check the condition of the DTC.
red–ground
pink/black–ground
red–any other coupler terminal
pink/black–any other coupler terminal
pink/black–any other coupler terminal
B
1
R P/B
Gy/G B/L
9-94
P0030
2
Y/R P/B O/G Gy/R O
Lg/R L/B G/B R/B B
R/L G/Y B
R/G Y/R Y/B L/W R/L B/W B/W