Question about 2001 Toyota Corolla

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Need to replace Electronic Control Module (ECM)

I was told I need to replace my Electronic Control Module, but I don't know where it's located. Can anyone tell me where to find it on a 2001 Toyota Corolla LE (manual)? From past experiences, I believe if I clean the contacts my problem may go away. Thank you.

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  • Anonymous Mar 27, 2014

    Body control module malfuctions how to diagnose and replace

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  • Toyota Master
  • 1,861 Answers

The ECM is located under the dash, on the passenger side.
It is a silver box with 4 plug-in wiring harnesses, rioughly 8" x 5"x 2"
It may help if you remove the glove box door, in order to see it.
Hope this helps.

Posted on Nov 13, 2008

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Posted on Jan 02, 2017

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Fuel control module 2008 escalade and the fuel pump quit working.if I run a hot wire to it it will run but as soon as I remove the hot wire it quits


Ran a hot wire to what fuel pump or the control module ? Which of these is yours ?
Figure 9: Fuel Controls - Fuel Pump Controls (LY6)
Figure 10: Fuel Pump Flow Control Module (Except LY6) Does yours have fuel pump flow control module under the vehicle Fuel Pump Flow Control Module (except LY6)
Mounted to the left side of the frame assembly below the driver seat ?
Fuel Pump Flow Control Module (FPCM) - LMF
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a 25 KHZ PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal. Maximum current supplied to the fuel pump is 15 amps. A liquid fuel pressure sensor provides fuel pressure feedback to the FPCM.
Electronic Returnless Fuel System (ERFS) - LMF
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure vent valve within the fuel tank provides an added measure of fuel pump flow control module (FPCM). Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control.
If your vehicle has this system check it for DTC'S - diagnostic trouble codes . Will take guess work out of it .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
DTC P0192: Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage
DTC P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
DTC P0230: Fuel Pump Relay Control Circuit
DTC P0231: Fuel Pump Control Circuit Low Voltage
DTC P0232: Fuel Pump Control Circuit High Voltage
DTC P023F: Fuel Pump Control Circuit
The engine control module (ECM) supplies voltage to the fuel pump flow control module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.
DTC P025A: Fuel Pump Control Module Enable Circuit .
Ford Electronic Returnless Fuel System Diagnosis Part 1 this for ford but the GM system works the same . You'll need a wiring diagram so you know what wires are what . Free wiring diagrams http://www.bbbind.com/free_tsb.html

Oct 31, 2016 | Cars & Trucks

1 Answer

How do I replace the computer chip that controls the gauges and sensors on my Buick Lacrosse?


What computer chip ? Your vehicle has up ten computers on the vehicle . PCM - engine control module , BCM - body control module , SRS - air bag control module , EBCM - electronic brake control module , The instrument cluster has a microprocessor inside , the heater / A/C control panel is a control module .All the control modules on your vehicle are connected on a serial data communication network .
There are 2 different communication networks on this vehicle: The class 2 network and the GMLAN network. The class 2 serial data circuit is the low speed link, and the GMLAN serial data circuit is the high speed link. Modules that need real time communications are attached to the high speed network. The engine control module (ECM) is the gateway between the networks. The purpose of the gateway is to transfer information from one network to another.
When one of these modules is changed it needs to be programmed , unfortunately the dealer is the only place to have it done at. A GM factory scan tool is needed to do the job ! If it's not done correctly the whole vehicle network will lock up, making the vehicle inoperable .
Class 2 Serial Data Link
The class 2 serial data link allows the following modules to communicate and share data with each other:
?€¢
Body control module (BCM)


?€¢
Digital radio receiver


?€¢
Electronic brake control module (EBCM)


?€¢
Engine Control Module (ECM) (LY7)


?€¢
Instrument panel cluster (IPC)


?€¢
HVAC module


?€¢
Powertrain control module (PCM) (L26)


?€¢
Radio


?€¢
Inflatable restraint sensing and diagnostic module (SDM)


?€¢
Vehicle control interface module (VCIM)


The GMLAN serial data communications circuit used on this vehicle is in a linear topology. The following modules are connected to the link, in order from DLC to the end of the linear configuration:
The following modules communicate on the GMLAN serial data circuit:
?€¢
The transmission control module (TCM), (LY7) 3.6-L


?€¢
The engine control module (ECM), (LY7) 3.6-L


I very strongly suggest you don't try to fix this problem !

Mar 19, 2015 | 2006 Buick LaCrosse

1 Answer

Location of the esc module on a 1994 gmc k1500 suburban & where is the wire to disconnect the esc locaticed


ESC module is for electronic spark control and is located on engine block near ignition coil . it's to control spark advance for timing.

hope it helps

Sep 29, 2014 | GMC Suburban Cars & Trucks

1 Answer

Were is the ecm located?


  • REMOVAL & INSTALLATION
  • Print


    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


    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.

    Jun 30, 2012 | 1993 GMC Safari

    1 Answer

    Where is the transmission control module located?


    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.

    Aug 03, 2011 | 1994 Chevrolet C1500

    1 Answer

    Went to get free diangostics and told me about tps sensor


    TPS is Throttle Positoin Sensor which is located on top of motor where throttle cable attaches. The sensor is there.

    QDM is quad driver which a part of the Electronic Control Module (ECM) The ecm itself may need to be replaced.

    Mar 06, 2009 | 1989 Buick Regal

    1 Answer

    Where is the PCM located on a 1991 Oldsmobile 98 Regency elite?


    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!

    Oct 21, 2008 | 1991 Oldsmobile Ninety Eight

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