KYMCO MXU 500i 2018 Service Information page 56

1.Quick Reference
malfunction
Idle air valve circuit
8 P0410
malfunction
Idle speed volume control
9 P0505
range problem
Injector or electric circuit
10 P0251
problem
Failure
Blinks Fault description
Codes
Ignition coil or electric
11 P0350
circuit malfunction
Fuel pump relay or electric
12 P0230
circuit malfunction
Engine speed has
13 P0219
exceeded top speed
1. Check if the ISC connector or
wiring is faulty.
2
2. Check the resistance of the idle air
valve.
1.Check the ISC steps range with the
diagnostic tool.
3 2. Check throttle body for carbon
deposits.
3. Check intake for air leaks
1. Make sure the fuel injector
connector is connected correctly.
2. Check if the ECU sends a signal to
the injector.
2
3. Check the power source and
resistance of the injector.
4. Make sure the battery is fully
charged and connected correctly.
Priority Fault management
1. Make sure the ignition coil connector is
connected correctly.
2. Check if the ECU sends a signal to the
ignition coil.
2
3. Check the ignition coil power source
and resistance.
4. Make sure the battery is fully charged
and connected correctly.
1. Make sure the relay and pump
connectors are connected correctly.
2
2. Check if the ECU sends a signal to relay.
3. Check the fuel pump relay resistance
2 Check if the CVT belt is broken.
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MXU 500i/700i