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Whether you are a huge dealership parts or service manager, a professional service center, a small mom and pop repair shop or even a private vehicle owner… you need your vehicles to run right. So when you need an electronic controller for your engine or transmission or lighting functions, you don’t have the time or budget to get it wrong. The problem now are most websites are selling used units and do not or can not offer repair services when required or cannot supply refurbished units, or provide proper advanced OEM VIN PATS SKIM programming.

#1 FAQ Finally Answered

ECM PCM BRAINBOX ECU ECC BCM MAIN BRAIN

WHAT IS MY CAR OR TRUCK COMPUTER CALLED AND WHICH ONE(S) DO I NEED TO TEST OR REPAIR OR REPLACE??

There is controversy over the terminology of the electronic control computers designed and implemented for electronic functionality within a vehicle like lights and blinkers and your wipers and lets wrap our head around the fact that engine control management and transmission control management is all controlled by on-board computers as well. For over two decades we have heard, "It is an ECU or an ECM? What is a PCM a BCM or a GEM?"

ECMtoGo.com has been specializing in Test & Repair, Programming & Replacement of ECM PCM computer controllers online since 1997. We have comprised the most knowledgeable team for servicing these highly technical, extremely sensitive and often very expensive vital components to your vehicle. These Computers control and initiate operation, engine performance, fuel regulation and optimization and of course carbon emission monitoring and control, and engine management diagnostics. Now we are here to help educate you not only in terminology, but the reason you may be in this position (or perhaps you're not in the position after all, if we test it and it tests good) and the best way to get out of it (ECM Repair Service or PCM Replacement Service) with the least amount of money spent and certainly the least amount of money wasted due to lack of information caused by misdiagnosis or misunderstood terminology! For more specific info on How to Diagnose an ECM or PCM or How Do I know If I need an ECM or PCM click here DIAGNOSING ECM

TERMINOLOGY AND ACRONYMS EXPLAINED

Electronic Control Module ECM Engine Control Unit ECU Powertrain Control Module PCM Engine Control Module ECM Engine Control Unit ECU Electronic Control Computer ECC Body Control Module BCM Vehicle Lighting Control Module VLCM or LCM, General Electronic Module GEM

Today's vehicle are full of computer controllers for engine management & engine diagnostics like Engine Control and Powertrain Control computer ECM PCM, Engine Control Computer ECC, Transmission Control Module TCM, Body Control Module BCM which can refer to several computer controllers in the vehicle (in the vehicle body as well as body controlling functions) such as the Security module BCM, Vehicle Light Control Module, General Electronic Module GEM and Totally Integrated Power Model TIPM which is the front control module and often the Fuse control combined now with added functions and critical operations.

Many of these computers can be considered ECM or ECU meaning they are Electronic Control Modules or Electronic Control Units. Within these references, there can be more strict differentiation, but for the purposes of this instruction source, let's just keep it somewhat simple. ECM and ECU is also an acronym for Engine Control Module and Engine Control Unit. On vehicles with manual transmission, there is no control unit necessary. On these models, the engine management system uses an ECM. Some models used a separate Transmission Control Module TCM that is linked with the ECM to control the automatic trans axle shift points. Many vehicles with automatic transmission have the Transmission Control Module TCM and Engine Control Module ECM integrated into a single Computer Control Module unit, called the Powertrain Control Module PCM. The ECM or PCM processes input from various sensors, compares the input with pre-programmed information and sends output signals to control the fuel supply, ignition timing, actuators such as the Idle Air Control IAC and the engine emission system. The PCM also controls the shift functions on automatic transmission models. And all the while the main computer ECM or PCM is also a diagnostic tool for accumulated and real time diagnostics and performance assurance.

COMMON SYMPTOMS OF A BAD ECM PCM ECU BCM:

  • Check Engine Light stays on after Resetting
  • Engine Cranks but does not Start
  • No Spark to Plugs
  • No Injection Pulse
  • Engine Starts and Dies
  • No Voltage Reference to Fuel Pump
  • Intermittent Starting Problems
  • Overheating ECU
  • ECU has Broken Pins
  • Loss of Communication between the ECU and the Scanner

COMMON CAUSES OF ECM PCM ECU BCM FAILURE

  • Charging System (Alternator, Batteries, Terminals, Harness/Lead/Ground Short)
  • Car was Jump Started with Reverse Polarity
  • Water Damage or corrosion
  • Fire Damage on the ECU
  • Alternator Overcharging Battery
  • Coil Pack Failure
  • Idle Air Control failure
  • Main Harness Short
  • Trans Harness Short
  • Lightning Strike
  • Rodents burrowing
  • Heat From Normal Operation (Electronics Heat Internally)
  • Heat (Cab or Engine Compartment)
  • Weathering Decay (Normal Wear and Tear)
  • Power Washing Engine
  • Floods or High Water
  • Leak in Cab from A/C or Window/Frame Damage

COMMON DTC STORED ERROR CODES:

P0601, P0605, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208. P0209, P0210, P0753, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310, P1633, P0505, P0122, P0123

When sending a Unit include our REPAIR SEND FORM

Please be detailed and specific. This information will help us to diagnose to possibly rule out a ECM PCM ECU problem or to confirm you or your tech’s diagnostics.

Our Goal is to provide you with the highest priority of fast, friendly, knowledgeable and complete service. We know time and monetary constraints can be a burden. We know what models have flaws and are serviceable. We know which models are not serviceable. With our abilities, we can often determine that the problem does not lie within your engine management computer or electronic controller. We have countless instances where we have saved the technician or vehicle owner hundreds to even thousands of dollars in parts, diagnostics, lost use of vehicle or rental fees for replacement temporary transportation by correctly ruling out or diagnosing a problem missed.

NOTE TO OUR DELAERSHIPS AND REPAIR SERVICECENTERS

We offer wholesale discounts.
As a business owner responsible for servicing vehicles there is no other company who can provide you with the knowledge and experience to assist you in this NEW AGE of computer controlled engine, transmission and electronic controlled computers. Trust with your customers builds your reputation and your bottom line profit margin. You cannot afford to make a mistake and charge a customer over a thousand dollars or more only to determine there has been misdiagnosis! We are your partner in this. We have the same goal as you. Offer an affordable, time sensitive, quality product at a competitive price. With our team on your side you instantly have the COMPETATIVE EDGE over any other servicing outfit.

We are specialists in auto computers from software to hardware, repairs and replacements. Unlike our competitors, we offer TRUE plug and play computers, SKIM, VATS, PATS, VTSS, WCM

PCM / ECU / ECM / BCM / TCM COMPUTER REPAIR SERVICES, EXCHANGE SERVICE, REFLASHING, REPROGRAMMING, CHECK ENGINE DTC, START & STALL, NO START NO BUS/NO COMMUNICATION

DODGE CUMMINS DIESEL, CHEVY DURAMAX

PERFORMANCE & ENHANCED PRODUCTIVITY PROGRAMMING CUSTOM TUNING SOFTWARE AND PROGRAMMING INCLUDING FUEL MPG INCREASE, REMOVING SECURITY

OFF-BOARD vehicle validation testing ensures product fits and functions properly OEM components with high failure rates are 100% replaced
All electronic modules are 100% tested to ensure they meet OEM requirements for the application When necessary advanced robotic equipment ensures precision made units and consistent high quality of our products Every unit is 100% tested to ensure quality and reliability

YOU DON’T WANT TO PLUG AND PRAY!!

YOU WANT TO PLUG AND PLAY!!

Most of the websites out there are new to this. Not ECMtoGO.com! We have been online since 1997! No other company can say that. Ebay.com had to start a category for our products. Before 2000 when we began selling there, they had no category for engine controllers PCM ECM or TCMs.

ECMtoGO.com specializes in engine control module ECM, transmission control computer TCM & electronic controller BCM and LCM. Specializing in OFF-BOARD DIAGNOSTIC VERIFICATION TESTING. Providing board level / component level repair services. Additionally we offer OEM/VIN programming & performance services, ECM PCM ECU BCM diagnostic services, and SKIM PATS VATS programming off-board when available to provide a Plug and Play product.

ECMtoGO.com The first specialized ECM PCM Repair company online!

SINCE 1997 ONLINE SERVICING THE FOLLOWING ELECTRONIC CONTROLLERS AND MORE….

  • DIAGNOSTICS AND VERIFICATION TESTING
  • COMMUNICATION DIAGNOSTICS
  • FORD ECM PCM REPAIR & SUPPLY
  • JEEP ECM PCM REPAIR & SUPPLY
  • DODGE SERIES ECM PCM REPAIR & SUPPLY
  • CHRYSLER ECM PCM REPAIR & SUPPLY
  • JAPANESE MFD ECM PCM REPAIR $ SUPPLY
  • KOREAN MFD ECM PCM REPAIR & SUPPLY
  • CUMMINS CELECT N-14 M-11 L-10 ECM REPAIR & SUPPLY
  • CUMMINS CELECT PLUS L-10 M-11 N-14 ECM REPAIR & SUPPLY
  • CAT 3126 CAT C4 CAT C7 CAT C12 ECM REPAIR
  • DETROIT DDEC 60 SERIES ECM REPAIR & SUPPLY
  • INTERNATIONAL 466DT 444DT 7.3 DIESEL ECM REPAIR
  • INTERNATIONAL INJECTOR DRIVER MODULE REPAIR
  • ALLISON TRANSMISSION TCM REPAIR & SUPPLY
  • FORD POWERSTROKE DIESEL ECM REPAIR
  • FORD POWERSTROKE DIESEL IDM INJECTOR DRIVER MODULE REPAIR & SUPPLY
  • GM CHEVY 6.6 DURAMAX DIESEL ECM REPAIR & SUPPLY
  • GM CHEVY 6.6 DURAMAX DIESEL FUEL INJECTOR
  • BODY CONTROL MODULE BCM REPAIR & SUPPLY
  • GEM GENERAL ELECTRONIC CONTROL MODULE REPAIR & SUPPLY
  • LIGHTING CONTROL MODULE LCM REPAIR & SUPPLY
  • TIPM - TOTALLY INTEGRATED POWER MODULE REPAIR & SUPPLY
  • COMPLETE ENGINE HARNESS REPAIR
  • INJECTOR HARNESS REPAIR
  • TRANSMISSION HARNESS REPAIR
  • OEM VIN SKIM VATS PATS PROGRAMMING

We boast the most knowledgeable and advanced diagnostic techs, repair service techs and programming service techs. We employ the most experienced crew in the business. We have an ASE Certified Master Technician with over 20 years in the auto service & specialized certifications including electronic diagnostics & servicing. We have techs who have been servicing electronic controllers since 1996 in board/component level repair including IC chip replacement. We have in-house OFF-VEHICLE DIAGNOSTIC Custom Built intellectually property priority protected ECM ECU PCM testing breakout box. So our expert technician and diagnostic engineers can scan the computers to determine if the ECM is faulty and verify post repair/programming functionality OBD-II through 2018 (select USA domestic models only). We have in-house Custom Built OFF-BOARD PROGRAMMING computer for ECM ECU PCM OBD-II programming, OEM programming, SKIM VATS PATS VIN FACORY UPDATE and Performance programming & custom tuning. Most services are completed in 1-2 business day once received and on our bench. We must have ALL REQUIRED INFO pertinent to the job. So all info must be included with the service order request. If there is a delay due to lack of info or interruption due to parts back order, you will be contacted with details. All repairs and services include a limited 1 year warranty.

For additional information as to whether you have a ECM PCM ECM failure issue, click on our link to DIAGNOSING ECM

Things to include in your diagnostics report when sending a unit in for test and or repair:

  • IS CHECK ENGINE LIGHT ON YES or NO
  • IS COMPUTER COMMUNICATING WITH A SCAN TOOL? YES or NO
  • IF YES INCLUDE ALL CODES
  • DOES VEHICLE CRANK YES or NO
  • DOES VEHICLE START YES or NO
  • IF NO START IS THERE INJECTOR PULSE YES or NO
  • IF NO START IS THERE SPARK TO PLUGS YES or NO
  • IF NO START IS THERE VOLTAGE REFERENCE TO THE FUEL PUMP YES OR NO
  • IF DIESEL IS WAIT TO START WORKING? STAYING ON?
  • DOES ENGINE START THEN DIE?
  • IF START AND DIE, HOW LONG UNTIL ENGINE DIES
  • CHECK FOR COMM/SPARK/INJ PULSE ETC WHEN ENGINE DIES
  • HAVE YOU REPLACED ANY PARTS?
  • IS IT COIL PACK FAILURE RELATED?
  • HAVE YOU CHECKED FOR A TSB TECHNICAL SERVICE BULLETIN?
  • WERE YOU TUNING ENGINE? DID YOU LOOSE BATTERY POWER?
  • DO YOU HAVE A HARNESS SHORT?

GM VEHICLE THEFT DETERRENT (VTD) RELEARN PROCEDURES

GM vehicles have three types of Vehicle Thief Deterrent (VTD) systems, each requiring their own set of relearn procedures. Unless these procedures are correctly performed the vehicle will not start after the PCM has been replaced. The three systems are: Vehicle Anti-Theft System (VATS), Passkey, & Passkey II – resistive chip ignition key Passlock – coded lock cylinder Passkey III – transponder ignition key How do you know what system your vehicle has? Just look at the keys (see info below).

The sections that follow will help you identify the system and describe how to do the relearn required for your application.

VATS, Passkey, & Passkey II – resistive chip ignition key

Vehicle Anti-Theft System (VATS) – VATS has a separate module called the Theft Deterrent Module (TDM) that validates the resistive chip in the ignition key. If the resistance value read by the TDM is what the TDM is expecting, the TDM will send a signal to the PCM informing the PCM that a valid key is present and the PCM may start the vehicle. No relearn is required on a VATS equipped vehicle when replacing the PCM. Passkey – The Passkey system has a separate module called the Theft Deterrent Module (TDM) that validates the resistive chip in the ignition key. If the resistance value read by the TDM is what the TDM is expecting, the TDM will send a signal to the PCM informing the PCM that a valid key is present and the PCM may start the vehicle. No relearn is required on a Passkey equipped vehicle when replacing the PCM. Passkey II – The Passkey II system has the Theft Deterrent Module (TDM) function stored in the Body Control Module (BCM). The TDM portion of the BCM will validate the resistive chip in the ignition key. If resistance value read by the BCM is what the BCM is expecting, the BCM will send a message over serial data to the PCM informing the PCM that a valid key is present and the PCM may start the vehicle. To perform a relearn on a Passkey II system, make sure there is a fully charged battery in the vehicle. The battery will be used for 30 minutes without the alternator available for charging. Connect a battery charger to the battery to ensure power is available while programming. Both the BCM and PCM must be working and communicating with each other.

1. Insert ignition key and turn to the “ON” position. Do not attempt to start the engine. Leave the key in the “ON” position for approximately 11 minutes. The security light will be steady on or flashing for the 11-minute period. Do not proceed to Step 2 until the security light turns off or stops flashing.

2.Turn the ignition switch to the “OFF” position for 30 seconds.

3.Turn the ignition switch to the “ON” position as in Step 1 for 11 minutes.

4. Turn the ignition switch to the “OFF” position for 30 seconds.

5. Turn the ignition switch to the “ON” position as in Step 1 for 11 minutes for a third time.

6. Turn the ignition switch to the “OFF” position for 30 seconds for a third time.

7. Turn the ignition switch to the “ON” position for 30 seconds.

8. Turn the ignition switch to the “OFF” position.

9. Attempt to start the engine. If the engine starts and runs, the relearn is complete.

Passlock – coded lock cylinder

The Passlock anti-theft system requires the presence of a key in the lock cylinder to enable starting. The lock cylinder contains a stationary Hall effect sensor and a rotating magnet. When the key is turned in the lock cylinder, the magnet creates a signal on the Hall effect sensor. The cylinder then sends a coded signal to the instrument panel cluster (IPC) or body control module BCM. If the IPC/BCM receives the expected coded signal, the IPC/BCM will send a message over serial data to inform the PCM that the vehicle may be started. To perform a relearn on a Passlock system, make sure there is a fully charged battery in the vehicle. The battery will be used for 30 minutes without the alternator available for charging.

Connect a battery charger to the battery to ensure power is available while programming. Both the IPC/BCM and PCM must be working and communicating with each other.

1. Turn ignition on.

2. Attempt to start the engine, and then release the key to the “ON” position.

3. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.

4. Turn ignition to the “OFF” position, and wait 10 seconds.

5. Attempt to start the engine, and then release the key to the “ON” position.

6. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.

7. Turn ignition to the “OFF” position, and wait 10 seconds.

8. Attempt to start the engine, and then release the key to the “ON” position.

9. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.

10. Turn ignition to the “OFF” position, and wait 10 seconds.

11. Vehicle has now learned the new password. Start the engine.

12. With a scan tool, clear any trouble codes. NOTE: For most cars, one 10-minute cycle will be enough for the vehicle to learn the new password. Perform all 3 cycles if the car will not start after 1 cycle. Most trucks will require all 3 cycles for learning the password.

Passkey III – transponder ignition key

The Passkey III anti-theft system uses a transponder inside the head of the ignition key. The exciter inside the ignition lock cylinder energizes this transponder when the ignition switch is turned on. The transponder transmits a unique signature to the theft deterrent control module. If the key signature transmitted is acceptable to the theft deterrent control module, the theft deterrent control module will transmit fuel enable password to the PCM. If the fuel enable password is correct, the PCM will start the vehicle. To perform a relearn on a Passkey III system, make sure there is a fully charged battery in the vehicle. The battery will be used for 30 minutes without the alternator available for charging. Connect a battery charger to the battery to ensure power is available while programming. When performing this relearn, all previously learned keys will be erased. Additional keys may be relearned immediately after the first key has been learned by inserting the additional key and turning the ignition switch to on within 10 seconds of removing the previously learned key.

1. Insert a master key (black head) into the ignition switch.

2. Turn key to the “ON” position without starting the engine. Security light should turn on and stay on.

3. Wait for 10 minutes or until the security light turns off.

4. Turn key to the “OFF” position for 5 seconds.

5. Turn key to the “ON” position without starting the engine. Security light should turn on and stay on.

6. Wait for 10 minutes or until the security light turns off.

7. Turn key to the “OFF” position for 5 seconds.

8. Turn key to the “ON” position without starting the engine. Security light should turn on and stay on.

9. Wait for 10 minutes or until the security light turns off.

10. Turn key to the “OFF” position. The key transponder information will be learned on the next start cycle.

11. Start the vehicle. If the vehicle starts and runs normally, the relearn is complete. If additional keys need to be relearned:

12. Turn the key to the “OFF” position.

13. Insert the next key to be learned. Turn the key to the “ON” position within 10 seconds of removing the previously used key.

14. Wait for security light to turn off. It should happen fairly quickly. You may not notice the lamp, as the transponder value will be learned immediately

15. Repeat steps 12 through 14 for any additional keys.