Yamaha XSR900 2022, Service Manual

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9-142
P0201
TIP
Disconnect the ECU related connectors before checking.
Refer to “PARTS CONNECTED TO THE ECU” on page 9-4.
Ground short circuit check “A”
Lines short circuit check “B”
5. Malfunction in ECU.
• Replace the ECU, and complete the service.
Refer to “REPLACING THE ECU (Engine Control Unit)” on page 8-41.
6. Delete the DTC and check that the MIL goes off.
• Start the engine and let it idle for approximately 5 seconds.
• Confirm that the DTC has a condition of “Recovered” using the malfunction mode of the YDT, and
then delete the DTC.
Between injector #1 coupler “1” and ground
red/black–ground
red/blue–ground
Injector #1 coupler “1”
red/black–any other coupler terminal
red/blue–any other coupler terminal
ECU coupler “2” red/black–any other coupler terminal
Relay unit coupler “3” red–any other coupler terminal
Is resistance
∞ Ω
?
YES
→
Go to step 5.
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code 36)
Is it hear operating sound?
YES
→
Go to step 6.
NO
→
Go to step 5.
W L/W R L/B L B Sb/W Sb
W
Br L/W R R
O Gy/R O/G P/B Y/R
B R/B G/B L/B Lg/R
B G/Y R/L
B/W B/W R/L L/W Y/B Y/R R/G
R/B R / L
R/B R / L
1 1 2
3
B A