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2.4 Analysis of starting motor
2.3 Analysis of starting motor
S t a r t i n g m o t o r
doesn’t run.
Turn on ignition switch and press the horn button or
turn on/off turning light switch.
Eletric horn cannot make sound
or make poor sound.Turning light
illuminates dimly.
Electric horn makes rotund sound.Turning light
illuminates brightly.
The power of storage battery is
not enough or the connecting
storage battery lead has poor
connection.
Press starting button and the
sound at the beginning of
electric starting cannot be
heard.
Press starting button and the
sound at the beginning of
electric starting can be heard.
Make short circuit of the connnection of battery on
starting relay and the connection of starting
motor with screwdriver and thick lead.
Remove the connecting component of starting relay from vehicle cable.
Connect the anode/cathode of storage battery with two down-leads of
starting relay coil with two leads.
After connection,starting motor
still cannot run and the sound at
the beginning of electric starting
cannot be heard.
Af ter connection,star ting
motor can run normally.
After short circuit
connection,starting
motor can run
normally.
After short circuit
connection,starting
motor still cannot run.
Check the circuit of electric
control system.
The connecting
p o i n t o f
starting relay
is damaged or
ablates.
Disassemble starting motor and check as follows:
[1]Check whether carbon brush is worn.
[2]Check whether the spring of carbon
brush breaks off or its elasticity is poor.
[3]Check whether armature comb is worn.
[4]Check whether armature coil has open
circuit or short circuit.
The coil of starting relay has open
circuit or short circuit.
[1]Check whether the connecting point of inner
clutch switch has bad connection.
[2]Check whether the connecting point of
starting button has bad connection.
[3]Check whether the circuit of inner electric
starting system has open circuit or short circuit.
Turn on ignition switch and press horn button or
turn on/off turning light switch.
Electric horn cannot make sound or make weak
sound.Turning light illuminates dimly.
Electric horn makes rotund sound.Turning light
illuminates brightly.
The power of storage battery is not enough
or the lead of connecting storage battery has
poor connection.
The running of starting
motor is weak.
Check whether the lead end from starting relay to
starting motor has poor connection.
Check and deal
with it.
Dismantle the connecting lead of starting motor from starting relay
and the connecting lead of storage battery.Press starting button.When
starting relay makes sound,measure the resistance between the
battery connection of starting relay and connection of starting motor
with ohmic meter.Check whether the resistance gets through.
Measure the resistance of motor
with ohmic meter and check
whether it gets through.
The connecting point of starting relay
is damaged or ablates.
No
Yes
Yes
No
