Ignition Tests; Ignition Coil Resistance Test - BRP Johnson J30TEL4SUA 2007 Service Manual

ENGINE CONTROL

IGNITION TESTS

IGNITION TESTS
WARNING
Before working on or removing any elec-
trical parts, disconnect the battery cables
at the battery to prevent electrical sparks.
Twist and remove all spark plug leads to
avoid accidental starting.
All cranking output tests must be performed with
spark plugs installed and torqued in the cylinder
head. If it is necessary to remove the spark plugs,
be sure to keep the spark tester away from open
spark plug holes.

Ignition Coil Resistance Test

Primary Side
Disconnect the primary coil lead wires from the
power pack. Connect an ohmmeter between the
primary coil lead wires.
If the measurement is out of specification, replace
the ignition coil.
Primary Ignition Coil Resistance Test
Tester probe connection
Red (+) Black (–)
White Black
1
1. Black wire
2. White wire
74
Resistance
0.17 to 0.23 ohms
2
001658
Secondary Side
Remove the spark plug cap from the high tension
cord. Connect an ohmmeter between the black
ignition coil lead wire and the high tension cord.
If the measurement is out of specification, replace
the ignition coil.
Secondary Ignition Coil Resistance Test
Tester probe connection
Red (+) Black (–)
High tension
Black
cord
1
1. Black wire
2. High tension cord
Spark Plug Cap
Remove the spark plug cap from the high tension
cord. Connect an ohmmeter between the contact
ends of the cap.
The resistance should be 4 to 6 kilohms. If the
measurement is out of specification, replace the
spark plug cap.
1. Spark plug cap
Resistance
4.8 to 7.2 kilohms
2
001659
1
001660