Yamaha SR400 2014 Service Manual page 290

Fault code No.
Item
2 Connections
• O
sensor coupler
2
• Wire harness ECU coupler
• Sub-wire harness coupler
3 Open or short circuit in wire harness
and/or sub-wire harness.
4 Incorrect fuel pressure
5 Defective O sensor.
2
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Installed condition of engine temperature
sensor.
2 Connections
• Engine temperature sensor coupler
• Wire harness ECU coupler
• Sub-wire harness coupler
24
O sensor: no normal signals are received from the O
2
sor.
• Check the coupler for any pins that may be
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
• Repair or replace if there is an open or short
• Between O
• Check the fuel pressure.
• Replace if defective.
Start the engine and let it run at idle, or reset it with diagnostic
code No. D63.
28
Engine temperature sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
D11
Displays the engine temperature.
Compare the actually measured engine temperature with the FI
diagnostic tool display value.
• Check for looseness or pinching.
• Check the coupler for any pins that may be
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
7-33
FUEL INJECTION SYSTEM
pulled out.
the coupler securely.
circuit.
sensor coupler and ECU cou-
2
pler
B/L–B/L (black/blue–black/blue)
Gy/G–Gy/G (gray/green–gray/green)
P/B–P/B (pink/black–pink/black)
R/L–R/L (red/blue–red/blue)
Refer to "CHECKING THE PRESSURE
REGULATOR OPERATION" on page 6-12.
Check or maintenance job
pulled out.
the coupler securely.
sen-
2