Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la
If it fails: lemon-manuals.org.ua

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Diagnostic Trouble Code Descriptions

***THIS ARTICLE INCLUDES UPDATES MADE BY TSB #89-5A-13, DATED MARCH 1989***



Equipment Hookup:

Preliminary Checkout, Equipment And Notes:





DIS Hook Up:





Diagnostics:

Pre-Diagnostic Information:





Ignition Symptoms and Trouble Codes Index:





Supplemental Testing Information:

Block Diagram:





DIS Wiring Schematic:





Wiring Diagram 38:





Abbreviations for the Schematic, Pinpoint Tests, and Breakout Box Overlay:





DIS Module and Pin-out:





DIS Component Location: