Cd Ignition System Troubleshooting Guide; Ignition Tester; Testing Cd Ignition Module Secondary - Kohler Courage SV470 Service Manual

CD Ignition System Troubleshooting Guide

Problem
1. Make sure the spark plug lead is connected
to the spark plug.
2. Check the condition of spark plug. Make
sure gap is set to 0.76 mm (0.030 in.).
3. a. Test for spark with ignition tester (See
Section 2).
Disconnect spark plug lead and connect it to
the post terminal of the tester. See Figure 7-4.
Connect the clip to a good ground, not the
spark plug.
NOTE: To maintain engine speeds normally
b. Make sure the engine ignition switch,
kill switch, or key switch is in the ''run''
Engine
position.
Will
Not
c. Crank the engine (minimum speed 500
Start
RPM), and observe the tester. Visible and
audible sparks should be produced.
4. Measure the resistance of module
secondary using an ohmmeter (see Figures
7-2 and 7-5):
Zero ohmmeter before testing. Connect
one ohmmeter lead to laminations (A).
Connect the other lead to the spark plug
terminal (C) of high-tension lead. With the
ohmmeter leads connected in this manner,
the resistance of secondary should be 7,900
to 18,400 ohms.
NOTE: This test cannot be performed
Figure 7-4. Ignition Tester (See Section 2).
Test
obtained during cranking, do not
remove the engine spark plug.
unless module has been fired at
least once.
Electrical System and Components
Conclusion
2. If plug is in good condition, check/adjust
gap and reinstall.
3. If visible and audible sparks are produced,
the ignition module is OK.
If visible and audible sparks are not
produced:
a. Make sure the engine ignition switch,
kill switch, or key switch is in the
''run'' position.
b. Check wires and terminals of ignition
module and other components for
accidental grounding and damaged
insulation.
c. If wires and terminals are OK, the
ignition module is probably faulty
and should be replaced. Test module
further using an ohmmeter (Test 4).
4. If the resistance is low or 0 ohms, the
module secondary is shorted. Replace the
module.*
If the resistance is high or infinity ohms,
the module secondary is open. Replace the
module.*
If the resistance is within the specified
range, the module secondary is OK.
*Refer to the Disassembly and Reassembly
Sections for complete ignition module
removal and installation procedures.
Figure 7-5. Testing CD Ignition Module Secondary.
Section 7
7
7.5