Question about 2006 Mazda 3

1 Answer

I have a 2002 mazda 6 an i am getting codes U0101 & U0073.. TCM not communicating and CAN bus A off The transmission is shifting hard and AT light is coming on. car going into 3 rd gear

Posted by on

  • Davea Mohammed Jul 04, 2010

    Mazda6 2002 AT light coming on and the car is struggling to pull of.. I did a scan on the car and got these two codes-

    U0101- TCM not communicating
    U0073- CAN connection error BUS A off

    is it my TCM?

  • Davea Mohammed Jul 04, 2010

    I will try as u say and run the different test.. i guess the jumping did not cause it as u said the tcm would have burned right away.. However what i noticed is we removed the TCM and cleaned it up and check all sorders and strangely the car started shifting then it started to act up again .. So something is definietely shorting somewhere either on the TCM or on the Solenoids...

    Thanks again for great support.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,509 Answers

Mazdas have had problems in the transmission area for years and it seems like they would be better by now. TCM module is the transmission module and it usally fritzes out becausr a soiloid shorts out and puts too hight a load on the system. The american makers have had so much troble in the past that thier computers turn the check light on disregard ( turn off ) whatever whent bad and try to drive on without that function. The TCM is under the radio but it's not likly to be bad unless the battery was hooked up backwards, jumped started wrong or other charging system problems. The trans will work with out it's computer but like you point out it shifts hard and you don' have high gear and converter lock=up. Find the different soioids on the transmission and un[lug them on at a time. Sounds simple till you go to do it. The connector has all the sensers and actuators in the same plug. but you can still test them for shorts to ground ( nothing is connected to ground inside the trans, unless it's bad.) then testing each wire to all the others with an OHM meter no wire should be connected directly to another 3 OHM minume. once you find the shorted wire remove them from the plug with a wire plug remover tool and thenput it all together and clear codes and them run it and see whick codes come back in. ( checking to see what doesn't work will help too.) the code discription will tell you what you disconnected and then just do what it takes to follow though on the code repair. ( there's lots of things that can happen. So if it's the lock-up soioid the trans has to come all apart and the rebuild may cost so much that a used unit or a trip to the car lot and trade that problem child in with the wire you found still dissconnected as the car will likly be better with out the bad circuit

Posted on Jul 04, 2010

  • 1 more comment 
  • Davea Mohammed Jul 04, 2010

    Thank you.. for the great advise. I had a transmission expert come in and run test on the solenoids.. he did as u said rub direct current to each circuit and ensure the solenoids were engaging.. What i did have in the pas was alternator problems and yes i did jump the car once.. Would this have cause the unit to go bad ? or other problems ... but thiss was like 6 months ago.

    Also i live in trinidad and tobago would you think that the TCM from mazda 6 in the US would work on my car > the part numbers are just slightly different?


  • John P Schwantes Jr Jul 04, 2010

    The american version is likly very different as we have fuel economy standards and it may have a differnt builder as the mazdas that are on the road here are made in the united states and the one you have could have been built in a different country. The jump starting and altenator problems we'er talking about are Lightning bolt fast. The computer goes like a burning match, ( up in Smoke ) The sensers can be damaged by putting power on them so make sure your on a solinoid. ( the wires are bigger the senser wires are small.) no wire should be connected to ground inside the transmission as they operate though the ground control circuits only power comes in for everything and gruond is controlled by the module. the problem will be found with an OHM meter then disconnect that wire and see what happens. Then code the car again and it'll tell you what you disconnected then find the directions to change that part.

  • John P Schwantes Jr Jul 05, 2010

    If cleaning it up getts it working keep cleaning! The plugs the plug into it are known for troble. The plug can be taken apart with the right tools and the wire ends can be cleaned or replaced. if you plugged it in and it worked good once the parts are likely OK and al your doing is finding the bad connection. Once working then you need to put some dielectric grease in the plug to keep the dirt and moisture out. I've never been to you area of the world but all the roads are paved and reasonably clean, You may be running in a area that I would call an offroad situation. You may have to solder each wire on to the trans connector just to keep a good connection.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 2006 Miata has a U0101 LOST COMMUNICATION WITH TCM


Leave this to the experts, very complicated testing with a special electronic scan tool must be done.

Sep 06, 2017 | Mazda Cars & Trucks

1 Answer

2005 Mazda 6 4cylinder codes u0101 & u0155


Common problem with several causes including bad ground wire or bad tcm/pcm. Highly recommend you check one of the many mazda forums for specific details

Aug 28, 2016 | Mazda Cars & Trucks

1 Answer

What should i look for when getting engine codes u0121,u0101,u0155,u0073,u0100. plus all lights on clusters on. some times car only goes 5mph till i shut off and restart.


All these " U " codes are communication issues amongst modules. These modules communicate on bus wiring from one to another. You have a communication issue with one or more modules. You will most likely have to have the vehicle proffessionaly scanned with a vehicle scan tool to be able to identify the source of this communication issue. You may have a bad module/wiring/power/ground issue to be repaired

Nov 29, 2015 | Cars & Trucks

1 Answer

What does this codes u0073 means ?


communication failure on CAN-Bus.
take it to the shop.
as in all cases, electrical
check all fuses first.
reseat the connectors to the transmission.
FSM
Trouble Code: u0073 Control Module Communication Bus Off
Trouble Code Conditions:
TCM fails to transmit and receive the data via CAN for specified time continuously.
Possible Causes:
  • TCM
  • circuits
  • ECM

Apr 24, 2014 | 2008 Suzuki Forenza

1 Answer

Tcm code u0101


TCM transmission control module. tells the trans when to shift up down or at all. may just need the module changed or hopefully not a short in the wires check the plugs on this also. dirty or corroded wires/plugs also cause this,

Apr 23, 2014 | Chrysler 300C Cars & Trucks

1 Answer

I have a 2005 Mazda 6 S 6 cylinder automatic. It started to shift hard and jerk a couple months ago and just recently got worse. A couple days ago it jerked when I accelerated as usual, but kept jerking...


A U Code means a module is not communicating. A technician needs to find out what module is not communicating and make sure it is getting power, ground and can communicate, If any one is missing it may be in the wiring. If all are present the module is bad.
A scan tool will help in this process.

Dec 01, 2013 | 2005 Mazda 6

1 Answer

Mazda 6 2005 u0101,u0155,u0121,u0073,u0100 codes coming up


I got the same problem. u ever figure it out? ive cleared codes and there the same. light on cluster lit up . plus some time after pulln away from stop car goes five mph. turn off start up drives fine. im about to burn this thing.

Apr 21, 2013 | 2005 Mazda 6

1 Answer

2004 Maxda RX8 codes U0101 & U0155


These are transmission control module can communications codes. ealer will need to repair these for sure.

Sep 10, 2012 | 2004 Mazda RX-8

1 Answer

I have a 2005 Mazda Tribute and i have 2 error body codes...They are B1318/U0073 can you tell me what these codes mean?


B1318 Safety restraint module supply below 9volts.
U0073 Can bus communication error.
Likely causes....Dead battery / charging problems or Wirng or supply to module or module fault.

Jun 03, 2011 | Mazda Tribute Cars & Trucks

4 Answers

Error code U0101: Lost Comm with TCM


i do have the same problem and i took the car to 5 differant mechanic an dget no solution the aaamco the petboys the mazda dealer another transmission specialist please let me know if u have any solution

Jan 02, 2010 | 2006 Mazda 3

Not finding what you are looking for?
2006 Mazda 3 Logo

Related Topics:

2,981 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mazda Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8572 Answers

Are you a Mazda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...