A/T - DFI Trouble Shooting: Overview
TRANSMISSION: Cadillac with DFIBULLETIN: # 025
SUBJECT: DFI Trouble-Shooting
DATE: September 1990
Climate Control Panels
In 1982 Cadillac started using Digital Fuel Injection (DFI) on all of their full size cars, except diesels. By using the climate control panel you can access trouble codes, monitor the output of various sensors and more. There are two basic types of systems, the early system, which was used from 1982 to mid 1985 and late system from mid 85 on. 1985 was a transition year. See figure 1 for the early type and figure 2 for the late type climate control panels. With both types you push the Off and Warmer buttons at the same time to get into the diagnostic mode.
BULLETIN RECAP
^ Push the Off and Warmer button at the same time to enter the diagnostic mode.
^ Push the Off and Hi fan button at the same time to clear trouble codes.
^ Use the status lights to check for T.C.C. ground.
^ Check engine data (early type) with the reset and instant average buttons.
^ Check ECM Data (late type) with the Lo and Hi Fan buttons.