Sym MaxSym 600i ABS Service Manual

1. General Information
1-13
Troubleshooting
A. Engine cannot be started or
difficult to be started
To this chapter contents
Check and adjustment
Fault condition
Probable causes
Normal cylinder compression pressure
Low or no compression
pressure
Restart the engine
No ignition
With signs of ignition but
the engine cannot be
started
Remove and check the
spark plug
Dry spark plug
Wet spark plug
1. Contaminated or clogged fuel injector
2. Malfunction of throttle valve operation
3. Malfunction of fuel pressure regulator
4.
Press the fuel injector feed pipe and confirm
whether there is fuel in the feed pipe
The fuel supply to the fuel injector is
sufficient
The fuel injector is not
supplied with sufficient fuel
1. Check the fuel amount in the fuel tank
2. Check if the fuel pipe and the vacuum
tube are blocked or not
3. Malfunction of fuel pump relay or wiring
4. Malfunction of fuel pump
5. The fuel strainer is blocked or not
1. Piston ring seized
2. Malfunction of cylinder valves
3. Worn cylinder and piston ring
4. Cylinder gasket leakage
5. Sand hole in the compression parts
1. Malfunction of throttle valve operation
2. Air sucked into intake manifold
3. Incorrect ignition timing
Check the spark plug ignition
condition
Perform cylinder compression
pressure test
Sparks
Weak sparks or no spark
1. Malfunction of spark plug
2. Spark plug contamination
3. Malfunction of ECU
4. Malfunction of the AC Generator
5. Ignition coil is in open or short circuit
6. Malfunction of main switch

Sym MaxSym 600i ABS Specifications

General

Brand	Sym
Model	MaxSym 600i ABS
Category	Scooter
Language	English