Ignition Module Test Procedure - Actron CP9087 Service Manual

Section 3

Ignition Module Test Procedure

GM • Ford • Chrysler • Toyota • Honda • Nissan
Important:
• This test checks for "dead" modules causing a no-start. This test will not
detect intermittent failures due to heat or engine vibration.
• Refer to vehicle service manual for module location, removal and installa-
tion procedures.
– Module access may require distributor removal. Follow service manual
procedures
– Check ignition timing with a timing light when the distributor is reinstalled.
• Always check the 9 volt battery in the tester (refer to page 1-4).
RANGE
FUNCTION
PULSE
3-2
Testing Ignition Modules
1) Locate module diagram on proceding pages.
2) Connect test leads as shown.
Begin with the Test 1 hook-up if more than one
test is shown.
Always make sure metal clips make good contact
HIGH
and do not touch each other.
LOW
POWER OFF
3) Set RANGE switch to LOW.
VOLTS
4) Set FUNCTION switch to FREQUENCY.
OHMS
FREQUENCY
5) Observe PULSE light for test results.
• Flashing light means good module. (There may
be a short delay before flashing starts.)
• No flashing means bad module.
Note: The bottom TEST lights may also flash.
This is normal and may be ignored.
Exception: When testing "ring" type modules
(lower half, page 3-11), spin the distributor shaft
to activate the PULSE light. (Light on or flashing
during spin means good module.)