Sym Wolf SB 250 Ni User Manual

3. Fuel Injection System
Intergrated troubleshooting procedure
3-35
Checking,
adjusting item
● Use meter to
measure battery
voltage
Fault reasons Fault status
determination
● Use diagnostic
tool to detect
battery voltage
Parts specifications
Battery
voltage
Detection items and
procedures
● Battery electricity
● Battery connector
loose
● Harness circuit
opening
● ECU coupler
disconnect
td l
● Is battery
voltage above
10 V?
● Is diagnostic tool
showing voltage
above 10 V?
● Diagnostic tool
should show
voltage above
10 V.
NO
YES
● Is fault code
shown on
diagnostic tool?
● Fault Code is
show again after
fault code
elimination?
● TPS fault
● ETS fault
● CPS fault
● MAP fault
● O2 sensor fault
● ROS fault
● ECU fault
YES
● Use diagnostic
tool to detect
existing fault
code
● Eliminating fault
codes, and
restart engine
Fault code
inspection
with
diagnostic
tool
Please refer to
service manual for
detection method
and specification of
each sensor.
NO
● Does injector
inject?
● Is injecting angle
normal?
● Fuel pressure
enough?
● Removed injector
from intake
manifold, but do
not remove the
hose. (Injector and
injector cap tightly
by hands, fuel
spills should not
be the case)
● Start the engine
● Examine whether
injector injects
● Connect pressure
gauge between
the tank and
injector
Fuel
quantity and
fuel
pressure
● Insufficient fuel in
fuel tank
● Fuel pressure
specifications:
Key-on three
seconds but no
start engine
→more than
250 kPa
Idle speed→
294±6kPa
● Injector fault
● Fuel pump relay
fault
● Fuel pump fault
● p filter
clogged
● ECU fault
Fuel pum
● Injector
resistance:
11.7±0.6Ω
NO
● Check fuel
pressure
YES
● Remove the
spark plug from
the cylinder
head with
ignition coil
connected
● Start the engine
● Check spark
plug sparks
Ignition
situation
● Check if spark
plug ignites?
● Check if sparks
of spark plug
strength is
normal?
● Spark plug fault
● Rollover sensor fault
● ECU fault
● Ignition coil fault
● Crankshaft position
sensor fault
● Spark plug
specifications:
NGK-CR8E
NO
next page
YES

Sym Wolf SB 250 Ni Specifications

General

Brand	Sym
Model	Wolf SB 250 Ni
Category	Motorcycle
Language	English