Integrated Troubleshooting Procedure - Sym HD2 125 Service Manual

Integrated Troubleshooting Procedure

Checking, Detection of
adjusting maintenance projects
Project and steps
Battery Use meter direct
●
measurement
voltage
battery voltage
Use diagnosis
●
tool detection
battery voltage
Diagnosis Use of the
●
fault code diagnosis tool
inspection detection fault
code
Elimination of
●
fault codes, and
then start engine
Fuel Removed the
●
injector on the
quantity and
intake manifold,
fuel
but not removal of
pressure
harness coupler.
(Injector and
injector cap tightly
by hands, fuel
spills should not
be the case)
Start the engine
●
Examine whether
●
injector fuel
injection
Between the tank
●
and injector
installation the
pressure gauge
check fuel
●
pressure
adequacy
Ignition Removed the
●
situation spark plug from
the cylinder
head, but then
power lines still
ring
Start the engine
●
check spark plug
●
sparks
To this chapter contents
Fault status
determination
Battery voltage
●
is 10 V above?
NO
Diagnosis tool
●
show whether
the voltage of 10
V above?
YES
Diagnostic tool
●
show whether or
not a fault code?
YES
Fault Code
●
cleared after
show again?
NO
Injector whether
●
injection?
Injector spray
●
angle is normal?
Fuel pressure
●
enough?
NO
YES
Examine
●
whether the
spark plug
NO
ignition?
Check spark
●
plug sparks
strength is
normal?
YES
Continued next page
5. Fuel Injection System
Fault reasons
Battery electricity
●
Battery connector
●
loose
Harness circuit
●
opening
ECU coupler not
●
connected properly
TPS fault
●
ETS fault
●
CPS fault
●
MAP fault
●
O2 sensor fault
●
ROS fault
●
ECU fault
●
less than fuel tank
●
Injector fault
●
Fuel pump relay
●
fault
Fuel pump fault
●
ECU fault
●
Fuel pump filter
●
obstructive
Spark plug fault
●
Roll over sensor
●
fault
ECU fault
●
Ignition coil fault
●
Crankshaft position
●
sensor fault
Parts specifications
Diagnosis tool
●
display voltage
required to
achieve more
than 10 V
The sensor
●
detection
methods and
specifications,
please refer to
repair manual
Pressure fuel
●
specifications:
Open the main
switch three
seconds after
but not start
engine →more
than 250 kPa
Idle →
294±6kPa
Injector
●
resistance
specifications:
11.7±0.6Ω
Spark plug
●
specifications:
NGK-CR8E
5-37