1989 SCAN TOOL REQUIREMENTS CADILLAC MODELS. Cadillac DeVille 1989

SUBJECT: 1989 SCAN TOOL REQUIREMENTS

During the 1989 model year Cadillac will offer two vehicles systems which require the use of a scan tool for proper diagnosis; the DeVille and Fleetwood Supplemental Inflatable Restraint system (SIR) and Brougham Closed Loop Catalytic Converster (CLCC). All other 1989 systems requiring data access are prorovided for in onboard diagnostics and will not require the use of a scan tool.

Many scan tool manufacturers have indicated that they will provide tool updates to address SIR systems; and almost all scan tool manufacturers now provide tools that are compatible with Brougham and Cimarron and past model CLCC, TBI and PFI systems used on Cadillac vehicles.

This bulletin provides some advance information from the tool companies about 1989 updates and some ordering information for currently available tools.

1989 BROUGHAM

The Brougham CLCC system is carryover for 1989. Scan tools which would properly display data and trouble codes on a 1988 Brougham will also work on 1989 Brougham systems. The service diagnostic procedures outlined in the Service Information Manual will continue to require the use of a scan tool. (The "Check Engine" light can still be used to flash trouble codes, but "non-scan" diagnostics will not be provided by Cadillac.)

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

The Supplemental Inflatable Restraint system (SIR) will become available as optional equipment on 1989 DeVilles and Fleetwoods sometime in the 1989 calendar year. Scan tools and catridges obtained for servicing 1989 SIR systems should also be compatible with 1990 Cadillac SIR systems. (The diagnostic data is planned to be the same in 1990 as 1989.) Although current codes can be flashed on the "Inflatable Restraint" telltale light, the system diagnostic procedures require that a scan tool be used to access all histroy trouble codes and to clear codes in the process of diagnosis.

NOTES ON TECH 1

While the Tech 1 tool has been made essential in 1989 for other GM divisions, Tech 1 will not be essential for Cadillac in 1989 and probably not in 1990. However, because the tool will be essential for other divisions, the supplier is offering Tech 1 at a special price to all GM dealers and A.S.E.P. colleges from June 1 through September 1, 1988. See the attached brochure for more information.

NOTES ON ON-BOARD DIAGNOSTICS AND SCAN TOOLS

Some scan tools can be used to access data and trouble codes on vehicles equipped with on-board diagnostics (Allante, DFI, 1985-1989 DeVilles, etc.). Scan tools also offer additional versatility over on-boards because they can be used underhand and offer additional features such as recording snapshot data. However, because the tool uses the ALDL data stream to get parameters, the tool data and the diagnostics data will sometimes not match - when in doubt, double check using the on-board display.

One example is that when a code is set on some past model DFI cars, the tool will show the substituted or "failsoft" sensor value. Diagnosis using the tool data would lead to false replacement of an ECM.

Table 1, following, summarizes some information about scan tool sources obtained from the tool suppliers.

SCAN TOOL SOURCES (1-4)

PRO-LINK 9000 Monitor 2000 Micro Processor Systems, Inc. (MPSI) Kent-Moore Tool Group 6405 19 Mile Road 29784 Little Mack Sterling Heights, Michagan 48078 Roseville, Michagan 48066 Phone: (313) 731-6410 Phone: (800) 345-2233 Available Through: (2) Available Through: - MPSI (Above Address) Kent-Moore (Above Address) - AC Delco Distributors - MAC Tools - Snap-On Tools

ALLSCAN (Model 8000) Tech 1 (3) Brainmaster II (Model 5258) GM Techline Alltest General Motors Corporation 2125 Stonington 28635 Mound Road Hoffman Estates, Illinois 60195 Warren, Michagan 48092-3499 Phone: (312) 519-0900 Phone: (800) GM-TOOLS (To Order) (800) ALL-TEST (800) 654-6507 (Information/ Available Through: Service) Alltest (Above Address) Available Through: GM Techline (Above Address)

NOTES:

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(1) This list is not all inclusive. The above sources responded to a Cadillac survey. Check with local jobbers and tool suppliers for more information on scan tool sourcing.

(2) Sears Roebuck and Kal Equip sell MPSI tools under their own brand name.

(3) Tech 1 is offering "essential tool" prices to all GM Dealers through August. See brochure for details.

(4) Bear is offering a "43-240 Module" for the Bear 40-950 Engine Anaylzer which covers Brougham, Cimarron and all DFI through 1988. An SIR module is planned as an additional update. Call your local Bear Automotive Service Equipment sales office, or Bear in New Berlin, Wisconsin at (414) 786-5212.

Table 1

Appox. Inflatable Restraint Price (1) Updates Coverage ----------------------------------------------------------- Allscan $895 "Field Updatable". Part of 1989 engine (For cost, check update. with Alltest)

Brainmaster II $525 Mail-In. Part of 1989 engine For cost, check update. with Alltest)

Monitor 2000 $380 Catridge. Running change to About $50. "1989 All Engine" catridge, available April, 1989

Pro-Link 9000 $600 Catridge. Part of 1989 engine About $150. update.

Tech1 $800 Cartridge Part of 1989 engine About $170. update.

DFI/BCM Other Applications (2) Applications/Features ---------------------------------------------------- Allscan "GM30" (for years & - Isuzu models, chack with - Unit includes built-in Alltest) VOM, memory, RS232 output - Diesel ECM

Brainmaster II "GM30" (for years & - Isuzu models, chack with - Diesel ECM Alltest)

Monitor 2000 1988-1989 C/E/K - Ford, Chrysler 4.5L engine

Pro-Link 9000 1988-1989 E/K engine - 1980-89 Ford 1981-1987 DFI planned - 1983-89 Chrysler midyear 1989. - Memory, RS232 output

Tech1 - Engines covered in - Memory normal ECM catridge - GM ABS, E&C MAF Tester - Special E/K/V/ system "Test Director". catridge available

(1) For comparison purposes. Includes tool and Cadillac applicable accessories through 1988.

(2) All tools listed cover Brougham, Cimarron, and past model CCC applications

SCAN TOOL PURCHASE DECISIONS

Points to Consider

1. Do you own a tool that can be updated to meet your needs?

Many dealerships and technicians can accommodate their requirements for tools by getting an update or adaptor for an existing tool model. This includes major equipment such as smart engine anlyzers and GM-CAMS.

2. Is the tool usable with all GM products from 1981 through 1989?

The constraint on many available tools is the ability to work with high speed data. High speed data is referred to as 8192 characters per second or 8192 baud. The ability to read high speed data is essential. Tools that will read data from a 1988 Cimarron 2.8L engine have "high speed" or "8192 Baud" or "GMP4" capabilty. Most tools that will read high speed data can also read data from Allante, Eldorado, and Seville data base or "UART" system.

Some tools can both read data and "talk" to the car by sending ECM or BCM commands and requests for special tests. While this could be a useful feature, Cadillac service information does not require that the tool be capable of commanding special test.

Dual dealers should note that a new capability required for some non-Cadillac GM vehicles is the ability to read data from steering wheel controls and remote radio system data links which communicate using "E&C" or "Entertainment and Comfort" data format. Applications include "W" cars and 1989 Oldsmobile Toronado. Other GM systems such as Delco ABS used on the "W" car may require the use of a tool. At present, GM Techline products such as Tech 1 and GM CAMS are the only available tools that have this capacity.

3. How is the tool updated?

Tools can be updated by purchasing or exchanging a cartridge or by returning the engire tool for update. Consider the update costs carefully. The recurring cost of updates can exceed the tool price within a few years of purchase.

4. Is the tool compatible with non-GM products?

Technicians and dualed dealerships may need tools that diagnose Ford, Chrysler, or foreign-made fuel systems, SIR, etc. Some scan tools are compatible with more than one make of car.

5. Does the tool work on cars with on-board diagnostics?

A scan tool can display data not available through diagnostics. An example if fuel integrator on past model DFI, not available in on-board display but available through a scan tool. See "Notes on On-Board Diagnostics and Scan Tools".

6. Will the tool record data?

Some tools will record and play back (snapshot) several minutes of data for use in diagnosing intermittent failures or other driveability problems.

7. Essential tool requirements.

Other divisions of GM or non-GM franchises may have a requirement for a particular make of scan tool as essential. Technicians may wish to consider purchase of the essential tool for their own use. Dualed dealerships may wish to consider purchase of more tools than the essential tool quantity required. While service of some Cadillac products requires the use of a scan tool, the choice of name brand is left to the discretion of the purchaser.

"We believe these sources and their equipment to be reliable. There may be additional manufacturers of such equipment. Cadillac Motor Car Division does not endorse, indicate any preference for, or assume any responsibility for the products or equipment from these firms or for any such items which may be available for other sources."

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.