FI
Fault
code No.
28
Symptom
Engine temperature sensor: open or short circuit detected.
Diagnostic code No. D11
Engine temperature sensor
Order
Item / components and
probable cause
Check or maintenance job
Reinstatement
method
1
Connections
•
Engine temperature
sensor coupler
•
Main wire harness ECU
coupler
•
Check the coupler for any pins that may be
pulled out
•
Check the locking condition of the couplers.
•
If there is a malfunction, repair it and
connect the coupler seculery.
2
Open or short circuit in wire
harness.
•
Repair or replace if there is an open or short
circuit.
•
Between engine temperature sensor
coupler and ECU coupler.
Black / Blue - Black / Blue
Green / Red - Green / Red
3
Defective engine
temperature sensor
•
Execute the diagnostic mode. (Code no.
D11).
•
Replace if defective.
1. Remove the engine temperature sensor
from the cylinder.
2. Connect the pocket tester to the engine
temperature sensor as shown.
3. Measure the engine temperature sensor
resistance
4. Is the engine temperature sensor OK?
Turning the main
switch ON.
FUEL INJECTION SYSTEM
6-20
Positive end --> green/red
1
1
1
1
1
Negative end --> black/blue
2
2
2
2
2
Engine temperature sensor
resistance
11 ~ 13K
Ω
Ω
Ω
Ω
Ω
(at 20
o
C)
•
Handle the air intake temperature
sensor with special care.
•
Do not submit the air intake
temperature sensor to strong impact.
If the sensor fall over, replace it.
V
V
V
V
V
WARNING
1
1
1
1
1
2
2
2
2
2
Summary of Contents for YBR250 2007
Page 1: ...YBR250 SERVICE MANUAL 5D1 F8197 E0 2007 ...
Page 2: ......
Page 359: ...YAMAHA MOTOR DA AMAZÔNIA LTDA ...
