Yamaha SR400 2014 Service Manual page 297

Fault code No.
Item
4 Open or short circuit in wire harness.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Malfunction in ECU
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of malfunction
46
Power supply to the fuel injection system is not normal.
• Repair or replace if there is an open or short
• Between battery and main fuse terminal.
• Between the main fuse terminal and fuse box
• Between the fuse box terminal (fuel injection
• Between the fuel pump relay coupler and the
After starting, let the engine run at idle speed for about 5 seconds.
50
Malfunction in ECU memory.
Unable to start engine
Unable to drive vehicle
—
—
—
• Replace the ECU.
TIP
Do not replace the ECU with the main switch set
to "ON".
Turn the main switch to "ON".
70
Engine idling stop: engine has been left idling. (The ECU
automatically stops the engine after 20 minutes if it is left
idling.)
Able to start engine
Able to drive vehicle
—
—
—
7-40
FUEL INJECTION SYSTEM
circuit.
R–R (red–red)
terminal (fuel injection system fuse)
R–R (red–red)
system fuse) and the fuel pump relay coupler
Br/Y–Br/Y (brown/yellow–brown/yellow)
injector coupler
R/L–R/L (red/blue–red/blue)
Check or maintenance job
Check or maintenance job