Tuesday, March 29, 2011

service the ride control on 1992 Cadillac Seville?

There is a reset procedure for this :----
In 92 model year Cadillac had major problems with the air ride suspension. The dealership has to install a special wiring harness to overide the computer. But once they do this there is no longer an air ride. If your air ride suspension still works it may be better to ignore the light. Without air it is a stiff ride kinda like an older corvette. I had the wiring harness and new struts installed at the dealer . There was a recall so you might find the harness at salvage yard.

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You can also try the by-pass method:----------
There is a way to have the SSS module blink out the problem codes but the info it reports may not be reliable.

To make a long story short the most economical way to solve this problem is to by-pass the whole system.
I found a webpage that explains how to do it.

You need a couple inexpensive parts the can be found on http://www.gmpartsdirect.com for less money than the dealer.


Seville with Computer Command Ride (CCR): Refer to the Service Manual page 8D-12. Set the BCM override value BS09 to 0 by using the warmer and cooler buttons. Store this value by pressing the Econ button on the climate control panel and the Instant Econ button on the Fuel Data/Drivers Information Center for about five seconds. The new value will be stored even through the indicator does not flash. Remove the key from the ignition. Disconnect both battery cables from the battery. When both cables have been disconnected, touch the ends of the cables together and hold for five seconds. This will discharge the capacitors in the system and allow the system to perform properly when the battery cables are reconnected. Advise the customer they will have to reset all radio stations and clock.

Document #740707
Info -- Procedure to Disable Illumination of Service Indicator AFTER installing Passive Struts #00-03-11-001A
Applies to:
• 1989-1992 Cadillac Allante
• 1991-1993 Cadillac Eldorado, Seville
• 1991-1995 Cadillac DeVille
This bulletin is being revised to clarify when this bulletin may be used to turn the service suspension lamp off. Also, a step has been added to the 1991 Cadillac Eldorado and Seville repair. Please discard Corporate Bulletin Number 00-03-11-001 (Section 3 -- Suspension)
Some owners may bring their vehicles in for service with an illuminated service suspension light. The service suspension indicator lamp is telling the owner that the vehicle is due for strut/shock replacement, a maintenance item. The customer may elect to have passive struts installed in their vehicles due to the repair cost savings and/or parts availability. The installation of passive shock/struts will result in handling characteristics which are the equal to a like vehicle without the computer controlled ride, with all other components such as tires, tire pressure, springs, etc. being equal. The installation of (4) new passive struts will cause the continued illumination of the service suspension indicator. If desired by the customer, the service indicator may be disabled AFTER THE INSTALLATION OF THE (4) NEW PASSIVE STRUTS, using the appropriate service procedure listed below. This bulletin DOES NOT authorize this procedure unless (4) NEW PASSIVE STRUTS WERE INSTALLED ON THE VEHICLE.
The wiring harness going to each strut and or chock assembly should be cut and taped back to clean-up the appearance both under the hood and under the vehicle. In addition, each specific vehicle will require a modification as outlined below:
• 1989-1992 Allante with Speed Dependent Damping (SDD): Refer to the Service Manual page 8D-13 (1989) or 8D-14 (1990-1992). On these vehicles, adjust the BCM Override value "BS08". To do this, use the warmer/cooler button on the CCDIC to decrease the BCM override value "BS08" which is displayed when you enter the system by two(2). When the desired number is displayed on the CCDIC, it must be stored by holding the "Elapsed Time" and "Fuel Used" buttons until the new value flashes on and off. When it flashes on and off, the new value has been stored.
• 1991 Eldorado and Seville with Computer Command Ride (CCR): Refer to the Service Manual page 8D-12. Set the BCM override value BS09 to 0 by using the warmer and cooler buttons. Store this value by pressing the Econ button on the climate control panel and the Instant Econ button on the Fuel Data/Drivers Information Center for about five seconds. The new value will be stored even through the indicator does not flash. Remove the key from the ignition. Disconnect both battery cables from the battery. When both cables have been disconnected, touch the ends of the cables together and hold for five seconds. This will discharge the capacitors in the system and allow the system to perform properly when the battery cables are reconnected. Advise the customer they will have to reset all radio stations and clock.
• 1992/1993 Eldorado and Seville with Speed Sensitive Suspension and 4.9L Engine Only: Refer to page 8A-43-6 in the 1992 Eldorado Seville Service Manual.
o Cut Circuit 1020 (PINK)
o Attach the IPC side of circuit 1020 to relay pin 87A
o Attach the module side of circuit 1020 to relay pin 86
o Run a ground wire to relay pin 30
o Run a wire from a switched ignition (hot in run) source to relay pin 85.
• 1991-1993 DeVille with Computer Command Ride (CCR): Refer to the Service Manual, page 8A-43-0. Cut Circuit 1300 (Dark Green wire) at the CCR module (Pin C15) to disable the indicator lamp. Tape the wires back into the harness to prevent shorting to other components.
• 1994-1995 DeVille with Speed Sensitive Suspension (SSS) and 4.9L Engines ONLY: Refer to the 1994 Eldorado, Seville, DeVille Service Manual, page 8A-43-14:
o Locate and cut circuit 370 (RED)
o Attach the IPC side of circuit 370 to pin 87A of the relay
o Attach the module side of circuit 370 to pin 86 of the relay
o Run a ground wire to relay pin 30
o Run a wire from a switched ignition (hot in run) source to relay pin 85.
• The following part numbers are required to make the correction on the 1992 Eldorado/Seville and the 1994-1995 DeVille:
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this procedure is to by pass for your car model:----

• 1992/1993 Eldorado and Seville with Speed Sensitive Suspension and 4.9L Engine Only: Refer to page 8A-43-6 in the 1992 Eldorado Seville Service Manual.
o Cut Circuit 1020 (PINK)
o Attach the IPC side of circuit 1020 to relay pin 87A
o Attach the module side of circuit 1020 to relay pin 86
o Run a ground wire to relay pin 30
o Run a wire from a switched ignition (hot in run) source to relay pin 85.
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It says only to do this when switching to non electric struts but if you feel your original struts are OK it still works and you can keep your original ones.
The bottom line is when the vehicle is going over 15 miles per hour, or quick starting, or quick stopping, or fast cornering the struts will go from soft mode to firm mod
Cadillac should have avoided all this technolgy and always
had the struts stay in firm mode in my opinion.
My advise would be keeping your old struts and bypassing the system with the disable information link above.
In the short term you can press the information buttton on the dash to make the service ride control message go away until you start up the car again.

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Also there are many other facing this problem:-----
Please click on the link below to read, what others did to resolve the issue:----
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Service manuals are available from time to time on Ebay. You don't need it for this if you follow directions carefully.

You can buy the relay (P/N 12193601) and the connector(P/N15306045) at www.gmpartsdirect.com .

The module you are looking for is mounted on the rear seat support, lower right, right of module marked Bosch, lower right side, accessible from the trunk. It is about 5" X 4" with a connector on the bottom.

Following the instructions previously posted, you will identify which pins on the relay correspond to the wires on the connector/socket. The relay is plainly marked as to pin identity. The socket has extra connections for other uses so just strip the ends of the wires you will be using.

You will find the pink wire coming out of the connector on the module. Cut it at a convenient place. You will wire pin 86 to the section of pink wire going to the module. You will wire pin 87A to the other section of pink wire.

You will locate the solid brown wire and splice the wire from pin 85 into it.

You will run the wire from pin 30 to a good ground. I used on of the bolts holding the Bosch module to the seat support.

That should do it.

When I did mine I soldered the connections and used shrink tubing and it has held fine for about 8 or 10 years.

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also other service bulletin mentioned as follows:----

There was a bulletin issued in August of 2000 about this. I quote from the bulletin:Some owners may bring their vehicles in for service with an illuminated service suspension light. The service suspension indicator lamp is telling the owner that the vehicle is due for strut/shock replacement, a maintenance item. The customer may elect to have passive struts installed in their vehicles due to repair cost savings and/or parts availability. The installation of passive shock/struts will result in handling characteristics which are the equal to a like vehicle without the computer controlled ride, with all other components such as tires, tire pressure, springs, etc. being equal. The installation of (4) new passive struts will cause the continued illumination of the service suspension indicator. If desired by the customer, the service indicator may be disabled AFTER THE INSTALLATION OF THE (4) NEW PASSIVE STRUTS, using the appropriate service procedure listed below. This bulletin DOES NOT authorize this procedure unless (4) NEW PASSIVE STRUTS WERE INSTALLED ON THE VEHICLE.At this point you can just ignore the light or find a Cadillac, Pontiac, Buick or Oldsmobile dealer to disable the light.

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Also click this link for same problem faced in 1994 car models.The problem is faced in all car models from 1990 to 1995 models.Click this link:---

http://ww2.justanswer.com/uploads/VLADGMRU/2008-12-08_121900_TSB.pdf

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USER COMMENT:---

It might be one of the GROUND WIRES for the motor I had the same problem with my 92 sts when the gas pedal is pressed the motor moves slightly and a loose wire will stall the motor and also confuse the computer giving wrong messages my loose wire was on the drivers side of the motor coming out of a bundle near the transmision I found it by accident while looking there and reving the motor and seen a spark then motor stalled.

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cLICK THIS LINK:---

http://caddyinfo.ipbhost.com/index.php?showtopic=1759

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