Where is the ECM located on 1994 Olds 98

P1296 CHRYSLER - 5 Volt Reference Voltage Missing At Throttle Position Sensor
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ECM, Engine control module. You can't do it. There are shops that can do it, but most likely a dealership.

REMOVAL & INSTALLATION

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OPERATION

When the term Electronic Control Module (ECM) is used in this guide it will refer to the engine control computer regardless that it may be a Vehicle Control Module (VCM), Powertrain Control Module (PCM) or Engine Control Module (ECM).
The Electronic Control Module (ECM) is required to maintain the exhaust emissions at acceptable levels. The module is a small, solid state computer which receives signals from many sources and sensors; it uses these data to make judgments about operating conditions and then control output signals to the fuel and emission systems to match the current requirements.
Engines coupled to electronically controlled transmissions employ a Powertrain Control Module (PCM) or Vehicle Control Module (VCM) to oversee both engine and transmission operation. The integrated functions of engine and transmission control allow accurate gear selection and improved fuel economy.
In the event of an ECM failure, the system will default to a pre-programmed set of values. These are compromise values which allow the engine to operate, although at a reduced efficiency. This is variously known as the default, limp-in or back-up mode. Driveability is almost always affected when the ECM enters this mode.

REMOVAL & INSTALLATION

See Figures 1 and 2

Fig. Fig. 1: ECM mounting scheme-except 1996 models

Fig. Fig. 2: ECM mounting scheme-1996 models
The ECM is located in the passenger side footwell in the kick panel up to 1996. In 1996, the ECM is located in the engine compartment next to the battery.

1. Disconnect the negative battery cable.
2. Disengage the connectors from the ECM.
3. Remove the spring retainer off and over the rail of the ECM on vehicles except 1996.
4. Slide the ECM out of the bracket at an angle.
5. Remove the ECM.

To install:

1. Install the ECM into the bracket.
2. Install the spring retainer (except 1996) and plug in the electrical connectors.
3. Connect the negative battery cable.

The TCM is part of the ECM (electronic control module) and is not a separate module. The ECM is located behind and to the right of the glove box, you will need to remove the glove box liner to gain access to it. It has a large 60 wire connector going to it.

For 1994 Oldsmobile 88 3.8L SFI OHV 6cyl the Engine Control Computer is located front seating area, passenger side, under dash, mounted above kick panel.

Hope helps (remember to rate this).

Sounds like the ECM (Electronic control module), sure it's the right one for that car?

ECM= Electronic Control Module
Dodge does not use a reset button (own 3 of them),that is Ford.

The PCMor powertrain control module is only on 1996 and newer cars.Earlier models have a ECM or electronic control module/pcm.You want to change the ECM if its a 1992.Its located under the right hand side of the instrument panel.The ecm has a prom( programmable read only memory)in it.You will need to remove this from the old ecm and install in the new ecm.The ECM/PCM can be used in many different GM vehicles but the prom is very specific and must be used only in the vehicle it was designed.The prom will not come with the new ecm and must be carefully removed and installed on the new ecm.There also is a CALPAK in the ECM ( A devise for fuel delivery) This may come with the new ECM But make sure all parts are the same.You should get a vehicle repair manual to do this job correctly,and make sure you do not damage your PROM.Your PROM is very IMPORTANT!

Technically it is called a "SPAR" Control Module" some folks call it ECM even an "Ignition Control Module" when asking for the new part a new guy will have troble finding by the more common names.... of course nothing beats experience(wink)

On the 98 Silhouette, the PCM should be located in the air filter housing.