For 1990-2009 cars

# 1985 FWD. DEVILLE AND FWD. FLEETWOOD TRAINING UPDATE

The 1985 FWD DeVille and FWD Fleetwood will be featuring many new electronic and mechanical systems with which dealership technicians must become familiar. This bulletin provides you with both an updated description of all Cadillac 1985 FWD DeVille and Fleetwood Training Courses and an in depth summary of the vehicle's electronics to be used in determining your dealership's specific training requirements.

The information provided in these courses is extremely important to the successful launch of these vehicles. Dealership management should carefully review all of this information and take the appropriate steps to assure your dealership can properly service these vehicles by model announcement. While careful consideration was given to assuring continuity with past model electronic diagnostics, customer satisfaction with this new vehicle will depend greately on your ability to service this new plateau of Cadillac electronic and mechanical systems.

Course # Course Name/Description --------- ------------------------

10484.01 1985 Cadillac BCM/DFI Electronics Program - A Cadillac exclusive 2-day course encompassing all of the electronic information listed below and intended exclusively for technicians with previous DFI training. This course is normally scheduled to run on two consecutive days; however, in some instances, to accommodate local training requirements, it can be run in two one-day segments. Technicians are requested to bring a copy of the 1985 FWD DeVille and FWD Fleetwood Service Information Manual with them to class.

1. Body Computer Module - 1 day Course #18001.03 Both HT4100 and diesel engine equipped Cadillacs will use a Body Computer Module (BCM). This BCM will provide microprocessor control for the following vehicle systems:

Electronic Climate Control Refrigeration System Control and Protection "Service Air Cond" telltale Rear Defogger Outside Temperature Display Digital Fuel Level Display Fuel Economy Display (HT4100 only) "Wait to Start" and "Water in Fuel" indicator display (diesel only) Vacuum Florescent Display Dimming Electric Cooling Fans Control "Coolant Temp/Fan" Telltale Retained Accessory Power (This new feature procides power to the windows and decklid release for a period of time after the ignition is turned off.)

2. Digital Fuel Injection - 1 day Course #16007.05 The Digital Fuel Injection (DFI) system used on the transverse 1985 HT4100 engine is similar to the basic 1984 system with the following exceptions:

Elimination of the BARO sensor Elimination of the Drive and Reverse switches Addition of a Park/Neutral switch Addition of a 3rd Gear switch Addition of a Power Steering Pressure switch Addition of a Transmission Temperature sensor Addition of an Electric EFE control relay Addition of a generator field voltage input Addition of a "Service Electrical System" telltale

BCM/DFI Course Content - A communication process has been incorporated which electrically links the Body Computer Moduel (BCM) to the Electronic Control Module (ECM) to allow transfer of information back and forth. Both modules will be providing diagnostic features similar to those found currently with 1984 DFI; however, all diagnostic control buttons and displays are controlled by the BCM. Any diagnostic feature requested for the ECM is accomplished automatically via the BCM/ECM communication process.

Outside of this communication link and the information shared between the two modules, the BCM and ECM control their systems independently. The following summarizes the new diagnostic features associated with the BCM as well as changes which were incorporated with the ECM diagnostics.

15 BCM trouble codes 6 BCM status indicators 12 BCM data parameters 2 BCM override modes ECM trouble codes, switch tests and output cyclind redesigned to incorporate changed inputs and outputs. All diagnostics control will utilize Climate Control panel buttons.

11004.01 BCM Controls and DA-6 Air Condition Compressor Service - A Cadillac exclusive one-day course that emphasizes the construction, operation, and service of the DA-6 compressor; a review of the refrigerant cycle and Body Computer Module (BCM) principles of operation. This course is intended for experienced air conditioning technicians.

10384.03 New Model Front Wheel Drive C-Car Features - A Cadillac exclusive one-day course that highlights the new and unique features associated with the 1985 FWD DeVille and FWD Fleetwood. This course is intended to familiarize service management, new car get ready, and line technicians with the changes in service procedures brought about by all the newly designed components and systems of these vehicles.

16014.05 HT4100 4.1L V-8 Engine - A Cadillac exclusive one-day course that covers the operation, unique construction and service procedures of the HT4100 engine. Course content has been updated to include transverse mounting provisions and all of the latest bulletin information. This course is intended for technicians with previous engine overhaul training or comparable experience. Technicians are requested to bring a copy of the 1985 FWD DeVille and FWD Fleetwood Service Information Manual with them to class.

16015.06 Diesel Engine 4.3L V-6-The two-day course covers the four stroke cycle diesel combustion process, engine operation and overhaul. Stanadyne DB2 injection pump operation and repair, dynamic timing, nozzle cleaning, MPG and smoke diagnosis is included. Course is intended for technicians with previous engine overhaul training or comparable experience.

17001.12 440 T4 Automatic Transaxle - This three-day course covers the operation, construction, diagnosis, overhaul, on-car service and adjustments of the transaxle and Cadillac exclusive viscous clutch. Course is intended for technicians with automatic transmission experience.

22001.37 Fisher Body Base Coat/clear Coat Paint - This one-day program is designed to familiarize experienced painters with the recommended procedures of spot repairing and full panel repairing of original Base Coat/Clear Coat acrylic enamel finishes using acrylic enamel finishes using acrylic lacquer or acrylic enamel as the paint repair material.

22310.12 1985 FWD DeVille and Fleetwood New Product- A one-half day course developed to familiarize dealer new car get ready and body technicians with the body design features of the 1985 Fleetwood and DeVille vehicle. The program includes removal and installation techniques along with hardware adjustments and diagnostics procedures related to body components and systems.

For further details, contact your local District Service Manager or zone office.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.