1994 Oldsmobile Ciera Computer Location

Tiny
JOHNNYCINFB
  • MEMBER
  • 1994 OLDSMOBILE CIERA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 12,700 MILES
I have a 1994 Olds Cutlass Ciera that is in need of the computer to be replaced. Where is it located on the car and what is involved in it's replacement?
Do you
have the same problem?
Yes
No
Sunday, January 3rd, 2010 AT 12:26 AM

4 Replies

Tiny
DAVE H
  • EXPERT
Hello .. thanks for the donation .. much appreciated

PCM 3.1L (VIN M) Located Behind right side of dash.


http://www.2carpros.com/forum/automotive_pictures/266999_olds_4.jpg



CAUTION:DO NOT remove part from packaging until ready to install. Ground any static-proof package before opening. DO NOT touch electrical terminals of components unless properly grounded. DO NOT lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible. See Fig. 1 .

Fig. 1: Servicing ECM/PCM Using 3M Anti-Static Mat
Courtesy of GENERAL MOTORS CORP.
NOTE:Before replacing ECM/PCM, carefully inspect all wiring and control components. Failure to test for short circuits may result in repeated ECM/PCM failure due to grounds and Quad-Driver failure. To prevent internal damage to ECM/PCM, ensure ignition switch is in OFF position when disconnecting or reconnecting ECM/PCM connectors or 12-volt components.

NOTE:When replacing defective ECM/PCM, remove knock sensor module or PROM from defective ECM/PCM. New ECM/PCM does not come equipped with knock sensor module or PROM (if applicable). Install knock sensor module or PROM into new ECM/PCM.

Removal
Ensure ignition switch is in OFF position. Disconnect negative battery cable. Remove electrical connectors from ECM/PCM. Remove ECM/PCM from vehicle. Remove access cover and remove knock sensor module or PROM (if applicable) from ECM/PCM.
Installation
Install knock sensor module or PROM (if applicable) in new ECM/PCM. Install access cover. Install ECM/PCM into vehicle. Connect electrical connectors to ECM/PCM. Reconnect negative battery cable to battery.

Hope this helps


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_935.png

Was this
answer
helpful?
Yes
No
-1
Sunday, January 3rd, 2010 AT 7:07 AM
Tiny
JOHNNYCINFB
  • MEMBER
Thanks for the great replay. I assume it is located behind the glovebox? What tools are necessary to remove and replace it?
Was this
answer
helpful?
Yes
No
Sunday, January 3rd, 2010 AT 10:18 AM
Tiny
DAVE H
  • EXPERT
Located below/behind glovebox. A 7mm socket and philips screwdriver are required !
Was this
answer
helpful?
Yes
No
+1
Wednesday, January 13th, 2010 AT 7:11 PM
Tiny
JOHNNYCINFB
  • MEMBER
It appears that what I odered and what I was sent are two different years. The place I ordered the computer from sent me a computer from a 1995. It appears that the wiring harnesses are the same, but I am unsure if it will fit in the same mounting bracket. My 1994 has clips that hold it in place, but the computer for the 1995 looks like it is held in a different way. I have attached a picture of my 1994. If I can get it to fit, will us


http://www.2carpros.com/forum/automotive_pictures/457474_DSCF1790_1.jpg

ing a different year computer have any negative effects?
Was this
answer
helpful?
Yes
No
Saturday, March 6th, 2010 AT 12:01 PM

Please login or register to post a reply.

Recommended Guides