Service manual

G420F(FE) Service Manual Chapter 4. Engine Electrical System 124
Component and Circuit Diagram
Inspection
1. 1st Coil Resistance Measurement
Measure resistance between no.1 (Ba+) and no.3
(ECU) terminals of ignition coil.
1st Coil Resistance : 0.71 ± 9 % (Ω)
2. 2nd Coil Resistance measurement
Measure resistance between high pressure
terminals.
2nd Coil Resistance : 18∼19.5 ± 14 % (kΩ)
Inspection of Spark Plug
Inspection and clean
① Ignition wire Ass’y ② Ignition Coil Ass’y
③ Spark Plug
1. Disconnect the ignition wire ass’y from the ignition
coil ass’y.
2. Remove the ignition coil ass’y by pulling the
ignition coil with hand.
3. Remove all spark plugs from the cylinder head
using a spark plug wrench.
CAUTION
Take care not to come foreign materials into
spark-plug mounting hole.