3-1
Section 2
3
Section
Testing
Ignition Modules
Troubleshooting
Tips
Save yourself time! Always begin with a thorough
visual and “hands-on” inspection. You can often
find the cause of many problems by just looking.
Has the vehicle been serviced recently? Some-
times things get reconnected to the wrong place,
or not at all.
Poor grounding can cause no-starts! Some
modules make ground connections to vehicle
chassis. Check mounting hardware, module
flanges and chassis for clean contact surfaces and
snug attachment.
• Inspect wiring for:
– Contact with sharp edges.
– Contact with hot surfaces, such as exhaust
manifolds.
– Pinched, burned or chafed insulation.
– Proper routing and connections.
• Check electrical connectors for:
– Corrosion on pins.
– Bent or damaged pins.
– Contacts not properly seated in housing.
– Bad wire crimps to terminals.
• Check crankshaft/camshaft sensors connected
to ignition module. (Refer to page 2-46.)
• Many ignition modules require heat transfer
grease applied between module and mounting
surface. Modules can overheat and fail if
grease is missing or incorrectly applied.
6DLC24
5AAC28
Summary of Contents for CP9087
Page 82: ...3 22 Notes...
