FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Code 48 (Continuous Memory)

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



Supplemental Testing Information (scroll down to find Diagnostic Test Charts):

Block Diagram:





Wiring Schematic:





Wiring Diagram - Ignition (Supercharged Engine):





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





DIS Module and Pin-out:





DIS Component Location:





DIS Waveforms:





Diagnostic Test Charts:

Ignition Symptoms and Trouble Codes Index:





Pinpoint Test D1 - D2:





Pinpoint Test D3 - D5: