Question about Toyota Corolla

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Want to install this ecm now,cause this vehicle is for business only.

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The plastic case in which the ECM is situated is on the left side in the engine bay, right next to the airbox (in european/us Corollas, in left drive ones the position is different) - the ECM just plugs in the big electrical connector from there. Don't forget to refit the 2 wire safeties on the connector, or the vibrations could unplug the connector.

Posted on Apr 02, 2011


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Were is the ecm located?

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    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.


    See Figures 1 and 2

    0900c152800a7f96.jpg enlarge_icon.gifenlarge_tooltip.gif

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

    0900c152800a7f97.jpg enlarge_icon.gifenlarge_tooltip.gif

    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.

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    speed_sensor.gif Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
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    1. Disconnect the negative battery cable.
    2. Remove the air cleaner box, refer to the air cleaner box.
    3. Remove the gray and black connector from the PCM.
      1. Remove the harness clip bracket from PCM bracket.
      2. Remove the nut from the upper bracket mount.
      3. Raise vehicle and support on hoist.
      4. Remove 2 lower bracket bolts.
        1. Remove 4 screws from bracket and remove bracket from PCM.
        1. Install bracket to PCM and tighten screws.
        2. Install PCM and bracket to body and tighten the 2 lower bolts.
        3. Lower vehicle.
        4. Install upper bracket nut and tighten.
        5. Clip in wiring harness bracket.
        6. Install gray and black connectors to the PCM.
        7. Install the air cleaner box, refer to the air cleaner box.
        8. Connect the negative battery cable.

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