KYMCO AHG5, Service Manual

Page: 305 / 363

17. IGNITION SYSTEM
DT X360
17-3
2. Service Information
General instructions 2.1.
˙
Some electrical components may be damaged if terminals or connectors are connected
or disconnected while the ignition switch is “ON” and current is present.
˙
When servicing the ignition system, always follow the steps in the troubleshooting.
˙
The ignition timing is set at the factory and is not adjustable. Perform the following
checks. Before performing any tests make sure the electrical connections are not loose
or corroded.
˙
The ignition control module or ECU may be damaged if dropped. Also, if the connector is
disconnected when current is flowing, the excessive voltage may damage the ignition
control module or ECU. Always turn off the ignition switch before servicing.
˙
A faulty ignition system is often related to poor connections. Check those connections
before proceeding.
˙
Make sure the battery is adequately charged. Using the starter motor with a weak battery
results in a slower engine cranking speed as well as no spark at the spark plug.
˙
Use a spark plug of the correct heat range. Using spark plug with an incorrect heat range
can damage the engine.
Specifications 2.2.
Item Standard
Spark plug
Type NGK CR7E
Gap 0.7~0.8 mm
Ignition coil
Primary coil resistance 2.8 K
Ω ±15%
Secondary coil resistance (without ) 9 K
Ω ±20%
Throttle position sensor resistance 3500~6500
Ω
Fuel pump resistance 1.9
Ω
Fuel injector resistance 10.5±0.53
Ω
Water temperature sensor resistance 2.076K
Ω ±10%
Oxygen sensor resistance(After warm up the vehicle) 120±24
Ω
Crank position sensor resistance 115±15
Ω
Rollover sensor resistance
Normal 0.4~1.4V
Fall down 4~4.4V