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Pcm failure i hve a problem i dont have the computer and harness of my mazda 3s what can i do

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Junkyard find is the cheapest bet, if not youll have to order a replacement harness and ecm from mazda. if the harness and ecm was stolen out of the car your insurance may cover the repair.

Posted on Oct 15, 2013

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How does you fix mazda bongo when it gives code p0628


Here is a list of possible causes of this fault code.






POSSIBLE CAUSES




• Suction control valve malfunction


• Connector or terminal malfunction


• Short to ground in wiring harness between suction control valve terminal A and PCM terminal 10


• Short to ground in wiring harness between suction control valve terminal B and PCM terminal 29


• Open circuit in wiring harness between suction control valve terminal A and PCM terminal 10


• Open circuit in wiring harness between suction control valve terminal B and PCM terminal 29


• PCM malfunction

May 23, 2016 | 2006 Mazda B

1 Answer

How do fix PO660 code for 2003 Mazda MPV


DTC P0660: INTAKE MANIFOLD COMMUNICATION CONTROL CIRCUIT - MALFUNCTION

Detection Condition

DTC is set, when PCM detects Intake Manifold Communication Control (IMCC) actuator input voltage remains too low or too high. This is an intermittent monitor. MIL does not illuminate.

Possible Causes
Connector terminal malfunction.
IMCC actuator malfunction.
Open circuit between IMCC actuator harness connector and main relay.
PCM malfunction.
Short or open circuit between IMCC actuator and PCM harness connectors.

Feb 03, 2016 | Mazda Cars & Trucks

1 Answer

Ishorted out the dash lights on my 2008 mazda b2300. I have changed 3 fuses but i still have no dash lights,any ideas


Does the dash have a printed wiring insert or is it a circuit board- remove the dash again and look over the socket that shorted out and make sure all pins are clean straight and not burned. For further repair a wiring schematic will be needed to test the light harness for power feeds for the dash and instruments.

Feb 04, 2013 | Mazda B2300 Cars & Trucks

2 Answers

Where is the pcm in a 2000 mazda mpv?


You can't test it, you decide if it is the problem by exhausting all other diagnostic possibilities before the $1000.00 part is replaced. The failure rate of this part is less than 2%, so be very careful that you are sure it is the problem.

Sep 04, 2012 | 2000 Mazda MPV

1 Answer

Intermittent dash light


PCM failures are actually VERY RARE on MOST vehicles. (Although you would not guess that by the number of PCM's that are sold and replaced every year). Too many people jump to conclusions and blame anything they cannot explain on "Bad PCM". Just read ANY online auto repair blog and you will find THOUSANDS of posts where the poster has already replaced the PCM, but the problem still exists.....

PCM replacement should only occur after ALL OTHER POSSIBILITIES have been THOROUGHLY checked with the correct equipment and the proper methods of testing.

OK, that's my "preaching" for the day......

I think it prudent to inform you that your DASH ILLUMINATION and PARK/MARKER lamps are not controlled by the PCM on your vehicle. So, I believe that would eliminate that possibility all-together. (Deep breath....sigh of relief ---- ; )

Those circuits DO go through the Passenger Junction Box (PJB) though.
Mazda has published a Technical Service Bulletin (TSB) for your car which addresses MANY intermittent electrical failures as a result of faulty/loose electrical connections at the PJB. I think that would be the first place I would look for the solution.

TSB REFERENCE NUMBER: 09-025/05

May 15, 2012 | 2004 Mazda 3

1 Answer

How do i get rid of a P0660 diagnostic code on my mazda 2001 protege?


Diagnostic Trouble Code (DTC) P0660 has a generic description of "Variable Inertia Charging System (VICS) Solenoid Valve Circuit Malfunction"
Diagnostic Trouble Code (DTC) P1569 has a generic description of "Variable Tumble Control System (VCTS) Solenoid Valve Circuit, Low Input"
Diagnostic Trouble Code (DTC) P1250 has a generic description of "Pressure Regulator Control (PRC) Solenoid Valve Malfunction"

These are all CIRCUIT failure codes. The circuits to each of these solenoids are SEPARATE circuits. The failure of one of these circuits SHOULD have no effect on the other two.

I did do a Technical Service Bulletin (TSB) search for your vehicle to see if there were any known problems that regularly cause these codes or if there are any computer programming issues that can cause these. The search came up negative - no known issues for ANY of these codes.

If your check engine light has been on for quite a while, it is possible that each of these failures occured at separate times and you simply did not know about the second and third failures because the check engine light was already on due to the first failure. Technically, you have three separate circuit failures no matter how it came about.

However, if these all showed up at the same time, I would be taking a hard look at the engine control wiring harnesses. It is that time of year for lots of rodent damage. They like to crawl up into warm engine compartmens and chew on things like wiring harnesses and vacuum hoses.

Another common denominator would be harness connectors. These wires all go through the same connectors, including the PCM connectors. It is possible that moisture and corrosion in a connector is shorting all of these circuits out. If you do not see any obviously damaged wiring harnesses, I would be taking connectors loose and examining the pins inside them.

Other than this, the only thing I can tell you to do is to diagnose each circuit individually. One may have a bad solenoid, while another has a loose connector pin, while the third one may have a broken wire. However, I think there is a real good possibility that if you find the problem with one of these circuits, the problem with the others will be close by.

Nov 16, 2011 | 2001 Mazda Protege

2 Answers

I have a 1999 Alero 3.4 V6 the cooling fans won't run. I checked the fans they both work if I unplug the harness for the temp sensor,the relays and fuses are fine,I replaced the coolant temp sensor and...


CHECK MODE RELAY IF BOTH RELAYS GOOD YOU CAN CHECK RELAY BY REMOVING IT FROM FUSE BOX HOOK RELAY TERMINAL 85 TO BATTERY POSITIVE AND GROUND TERMINAL 86 IF CLICKS RELAY GOOD. IF RELAY GETTING POWER GOOD AND THE 30 AMP COOLING FAN FUSE OKAY.EITHER THERE IS A SHORT IN COOLING FAN WIRING OR THE PCM HAS FAILED.THE PCM HAS LOST OR COMMAND RUN CIRCUIT IN PCM SHORTED OUT DUE TO PCM FAILURE.LET DEALERSHIP OR GARAGE USE DIAGNOSTIC EQUIPMENT TO ACTIVATE THE PCM SEE IF IT HAS FAILED.DONT SPEND MONEY ON NEW PCM COULD BE SHORT IN THE WIRING CIRCUIT

Sep 06, 2011 | 1999 Oldsmobile Alero

1 Answer

1988 Toyota Celica GT4 Computer box


There is no problem with your computer box, it says 3S-GT on it, thats the way toyota did them back then. same with the 3S-FE (says 3S-F on the comp. box) and 3S-GE (3S-G on comp. box.) i dont recommend removin the cat. you will get defected (or waht is equivelant to a defect where you are) due to smog and stuff like that. Turbo timer is wired to the igntion system, no problems there. and as for gauges: get a pro to install them, but there should be zero trouble.

Sep 30, 2008 | 1988 Toyota Celica Liftback

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