Yamaha SR400 2014 Service Manual page 286

Fault code No.
Item
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Connections
• Intake air pressure sensor coupler
• Wire harness ECU coupler
• Sub-wire harness coupler
2 Open or short circuit in wire harness
and/or sub-wire harness.
3 Defective intake air pressure sensor.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Intake air pressure sensor hose.
2 Defective intake air pressure sensor.
13
Intake air pressure sensor: open or short circuit detected.
Displays the intake air pressure.
Set the engine stop switch to " ", and then operate the throttle
while cranking the engine. (If the display values change, the per-
formance is OK.)
• 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 intake air pressure sensor coupler
• Execute diagnostic code No. D03.
• Replace if defective.
Turn the main switch to "ON".
14
Intake air pressure sensor: hose system malfunction
(clogged or detached hose).
Able to start engine
Able to drive vehicle
D03
Displays the intake air pressure.
Set the engine stop switch to " ", and then operate the throttle
while cranking the engine. (If the display value changes, the per-
formance is OK.)
• Check the intake air pressure sensor hose
• Repair or replace the intake air pressure sen-
• Execute diagnostic code No. D03.
• Replace if defective.
7-29
FUEL INJECTION SYSTEM
Check or maintenance job
pulled out.
the coupler securely.
circuit.
and ECU coupler.
L–L (blue–blue)
P/W–P/W (pink/white–pink/white)
B/L–B/L (black/blue–black/blue)
Refer to "CHECKING THE INTAKE AIR
PRESSURE SENSOR" on page 7-71.
Check or maintenance job
condition.
sor hose.
Refer to "CHECKING THE INTAKE AIR
PRESSURE SENSOR" on page 7-71.