Driver Memory System

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Seat or Mirror - Loss of Adjustment Functions

86-148

Driver's Seat and Mirrors Control Module - Loss of Seat or Mirror Functions - Repair Procedure

MODEL: Sedan Range 1994 MY VIN 687219 - 701123

DATE: 4/95

ISSUE:

Loss of any driver seat adjustment function, door mirror adjustment function, or any combination of seat and mirror adjustment functions in 1994 MY Sedan Range vehicles from VIN 687219 - 701123, may be caused by a failure of the driver's seat and mirrors control module (ECM). If a function fails, it would cause the adjustment controlled by that function to remain at its last position. To prevent repeat failure of the ECM, perform the following action.

ACTION:

If the driver's seat and mirrors control module fails on a 1994 MY Sedan Range vehicle within the VIN range listed above, BOTH door mirrors must be replaced with revised mirror units (left mirror, part number HMD 3043AC) (right mirror, part number HMD 3042CC) when the ECM is replaced.

NOTE : A production change within the VIN range added capacitors to the door mirror motors. The capacitors, which were added to reduce radio interference, may induce an electrical resonance in the mirror circuit causing ECM failure.

The supply of revised door mirrors is limited. Use revised mirrors ONLY on vehicles that have a failure of the control module.

PARTS INFORMATION:

Do not order revised mirrors for dealer stock. Please order on a VOR basis only.

DESCRIPTION PART NO QTY

Driver's seat and mirrors control module LHB 2165AA 1 Door mirror-left side HMD 3043AC

1 Door mirror-right side HMD 3042CC 1

When this happened to my car, the mirrors behaved as you describe - they would only move downward - rather than being stuck in one position as stated in the bulletin. I first replaced only the ECU (beneath the leading edge of the driver's [U.S. - left side] seat) with a used unit. This lasted a few months and the problem recurred. I then replaced the ECU _and_ both outside mirrors, again with used units, making sure the mirrors came from a car outside the affected VIN range per the service bulletin (so the mirrors would not have the capacitors referred to in the TSB). This was 2+ years ago and that problem has not recurred, although at times when I enter the car and press the memory button the right-side outside mirror doesn't adjust to the proper position. If I use the mirror adjusting lever to move that mirror and then press the memory button it will then adjust to the proper position. Gotta love these electrical quirks, eh? Hope this helps.

Pepe

Thanks, Pepe. Sounds a bit involved - and expensive.

Some new information: everything works as it should if I open the door with the key, and not the remote. I'll buy a new battery for the remote to eliminate that problem, then re-program the remote.