Question about 2004 Mazda 6

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What is TCM and ECM

How do fix the above mentioned faults?

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Tcm= transmission control module ecm= engine control module. Vehicles with an automatic transmission are equipped with both of these. Many vehicles now have what is called a PCM, which is a powertrain control module and is Both the TCM and ECM in one controller. Feel free to ask if you need any further assistance. Regards,-Tim

Posted on Mar 30, 2015

  • Tim Messina
    Tim Messina Mar 30, 2015

    as far as fixing them, you can call 888-672-4816 for a price quote to get yours fixed or we can send you a fully rebuilt replacement. Lifetime warranty! Tell them Tim from fixya.com sent you for a low internet price. Have a Great day!!

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2003 saturn L300 p1780


DTC P1780 (3.0L (L81))

To improve shift feel, the transmission control module (TCM) may request that the engine control module (ECM) reduce engine torque during shift events. When such a request is received, the ECM responds by retarding the base ignition timing and notifying the TCM that the request has succeeded. If the ECM is unable to comply with the request, the ECM sends the TCM a message that the request has failed.
The torque reduction request is sent to the ECM through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P1780 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P1780.
When the TCM receives a torque reduction failure message from the ECM, then DTC P1780 will set. DTC P1780 is a type C DTC. Take your pick of which you think this code is for , this or the TSB - technical service bulletin. What need to hook up scan tool an data PID'S - Do you know what PID'S are ? sensor data read on a scan tool .

Mar 04, 2016 | 2003 Saturn L-Series

2 Answers

I have a 1998 audi a4. it will not start and gives me the p1749 and p1625 codes. how do i fix this?


code p 1625 refers to CAN databus, TCM--incorrect signal===causes --TCM trouble code/s stored---TCM incorrectly coded---wiring---matching resistor in ECM
I don't have a listing for code p 1749 but codes 1748 and 1750 are concerned with TCM defective and voltage supply low
so after you check the wiring and connections form the transmission you have 2 options
use a known good ECM to replace yours ( will eliminate any ECM faults)
and/or replace the TCM module on the transmission

Nov 14, 2015 | 1998 Audi A4

1 Answer

How do fix TCM and ECM


Hello, It is not just a simple answer to your question of fixing tcm and ecm Depending on the issue you with the TCM or ECM you will need all the proper tools and maybe the Mazda software. even if you have all these things, you still need the knowledge on how to use them or you can damage the ECM TCM very easily. If you have an OBD2 scan tool then you can scan the codes and clear them. The light should go out. If it comes back on then scan the codes again and post them here. I will tell you what you need to do. The code will start with a letter then four numbers, like this P0301 or P1611 or something like that. I am here to help, -Tim

Mar 30, 2015 | 2004 Mazda 6

1 Answer

P700 code po750


code p0700 refers to transmission control system/ MIL- malfunction===causes--wiring ---TCM replace the TCM
code p0750 refers to shift solenoid9SS) A-circuit malfunction===causes --wiring---shift solenoid ECM/TCM. When the TCM is replaced then it should be fixed as the TCM is common in both faults.

Oct 13, 2013 | 1999 Chrysler 300M

1 Answer

What does diagnostic code PO0706 and PO700 mean?


OBD II Fault Code
  • OBD II P0706
Fault Code Definition
  • Transmission Range Sensor Circuit Range/Performance
The purpose of the automatic transmission is to match the engine's optimum power and torque characteristics to the driver's desired rate of acceleration and speed by auto-selecting different gear ratios or 'speeds' to power the wheels. The Transmission Range Sensor (also referred to as the PRNDL input and/or neutral safety switch) tells the transmission control module (TCM) and the powertrain control module (PCM) that the transmission is in park, reverse, neutral, drive, low, 2nd, 3rd etc. It is attached directly to the manual valve of transmission, so when the shift lever is moved say from park to drive, the Transmission Range Sensor communicates this critical information to the above mentioned vehicle computer systems.

P0700
Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults. If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory.

May 18, 2013 | 2000 Honda Civic

1 Answer

1997 honda accord tranmission problem code p0700 drive 4 flashes


Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults. If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory.
This illuminates the Malfunction Indicator Lamp (MIL) to let the driver know there is a problem. If this code is present and the MIL (Malfunction Indicator Lamp) is illuminated that basically means there is at least one transmission code set in the TCM's memory. P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module.

Symptoms Symptoms of a P0700 DTC may include:
  • Malfunction Indicator Lamp (MIL) illumination
  • The transmission may exhibit drivability problems like slipping, etc.
Causes More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely).
Possible Solutions For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission.
If the TCM compatible scan tool will not communicate with the Transmission Control Module then that is a good indication that there may be a fault with the TCM itself.

Oct 20, 2012 | 1997 Honda Accord

1 Answer

Wont start trouble codep0700 is the only code


Hi there:Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults. If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory.
This illuminates the Malfunction Indicator Lamp (MIL) to let the driver know there is a problem. If this code is present and the MIL (Malfunction Indicator Lamp) is illuminated that basically means there is at least one transmission code set in the TCM's memory. P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module.
More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely).
For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission.If the TCM compatible scan tool will not communicate with the Transmission Control Module then that is a good indication that there may be a fault with the TCM itself.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using FixYa, have a nice day

Mar 02, 2012 | 1996 Chevrolet Blazer

1 Answer

P0700


Hi there:Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults. If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory.
This illuminates the Malfunction Indicator Lamp (MIL) to let the driver know there is a problem. If this code is present and the MIL (Malfunction Indicator Lamp) is illuminated that basically means there is at least one transmission code set in the TCM's memory. P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module.
More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely).
For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission.If the TCM compatible scan tool will not communicate with the Transmission Control Module then that is a good indication that there may be a fault with the TCM itself.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using FixYa, have a nice day.

Mar 02, 2012 | 1996 Chevrolet Blazer

1 Answer

What do these codes mean needs to be fixed. P1529 and P1723. Thank you


The TCM can request activation of the MIL lamp Via a communication line to the ECM. This is only a request from TCM to ECM to turn the MIL on. The fault code is stored in the TCM. Select Transaxle system on the Scantool and monitor DTC related automatic transaxle system.
DO ALL REPAIRS associated malfunction with A/T.
Is that all?

Feb 19, 2011 | 2003 Hyundai Santa Fe

2 Answers

Trans range sensor circuit malfunction


Transaxle Range Sensor Circuit Malfunction (PRNDL Input).  

Check for: _ Possibly a connector near the shift lever has come loose/dirty contacts, or there is a broken wire from it somewhere going to the TCM 
- Corroded or faulty Range Switch. - Open between Meter Fuse and Range Switch (C136-4).
- Open between Range Switch (C136) and TCM (C229) on one or more circuits. 
- Short to Battery between Range Switch (C136) and TCM (C229) on one or more circuits. 
- Short between two or more wires between Range Switch (C136) and TCM (C229). 

If Meter Fuse is blown, repair any shorts in the Meter Fuse circuit.

P1624 MIL Request Signal from TCM to ECM.This is only a request from TCM to ECM to turn the MIL on. The fault code is stored in the TCM.The Freeze Frame Data is stored in the ECM under the P1624 request code. Be sure to retrieve freeze frame data before clearing code P1624 from ECM. 
TCM = Transmission control module 
ECM = Engine control module (or more commonly known as ECU) 
MIL = Malfunction indicator light (more commonly "check engine light" or CEL) 

Good luck and hope this helps

May 05, 2009 | 2003 Kia Spectra

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