Standard: Air temperature: 20-30℃, 53±20%Ω
Circuit inspection of idle speed stepper motor:
Stepper motor
On
NG:A+Open circuit
Stepper motor
On
NG:A-Open circuit
Stepper motor
C-J1-12
On
NG:B+Open circuit
Stepper motor
D-J1-13
On
NG:B-Open circuit
Cleaning
The stepper motor assembly is integrated at
throttle body. For cleaning, first disassemble stepper
motor and then clean it using a clean cloth.
Resetting of idle speed stepper motor
The resetting method of the idle speed
stepper motor is hereby explained: After the
production and debugging of new motorcycle
are finished, the debugger will take off the storage
battery and wait for packing the vehicle. This will
cause a sudden power down of the ECU and all
self-learning of ECU (including self-learning of the
stepper motor), result in the lost step of stepper
motor and forget their current locations; after the
storage battery is installed and powered on next
time, the stepper motor will be in a “chaotic” state,
thus resulting in instable idle speed, high or low
idle speed. At this time, we need to reset the
stepper motor. Method: after starting the
motorcycle, turn off the key and wait for 15
seconds. Then turn on the key and start the motorcycle
to check whether the stepper motor has returned to
normal. If it has not returned to normal, repeat
the resetting operation.
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