Mazda

Mazda Repair Questions? Ask Mechanics for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Mazda

1998 mazda b2500 OBDII not communicating with emissions test machine. The emissions test machine is for the vehicle...

Customer Question
1998 mazda b2500 OBDII not...
1998 mazda b2500 OBDII not communicating with emissions test machine.
Submitted: 1 year ago.Category: Mazda
Show More
Show Less
Ask Your Own Mazda Question
Answered in 6 minutes by:
6/15/2016
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Mazda
Satisfied Customers: 1,529
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Hi there.

When you say "emissions test machine", are you referring to a generic scan tool? If so, have you tried a different one? reason for asking is that some generic scanners and code readers will not communicate with Mazda vehicles.

Also, what are you trying to diagnose/fix?

Ask Your Own Mazda Question
Customer reply replied 1 year ago
The emissions test machine is for the vehicle state emissions test required in Texas. I do not have a scan tool. Every time I think I may have found the problem I have to take the vehicle to be re-inspected. The fault on the computer says OBDII connection time out. All I need to do is pass the emissions test, but I cant run the test until there is proper communication. I have also taken it to two different inspection places to rule out the machine.
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

I see. There is an easy way to determine whether the fault lies with your vehicle or their emissions test machine; go to any major auto parts retailer such as Advance Auto, Autozone, O'Reillys, etc. and ask them for a free computer scan. If their scan tool communicates with your truck, then go back to the testing facility and tell them what has happened and ask them what is the official procedure to follow in cases such as yours.

However, if the auto parts' scan tool cannot communicate either, then the issue is with your truck - we can help you with that as well if necessary.

Ask Your Own Mazda Question
Customer reply replied 1 year ago
I did exactly that when I replaced the ecm. They were unable to get any codes from my truck although they couldn't tell me if it was because it was communicating or not. The inspection place has done several inspections after me so I doubt it's a problem with their equipment.
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

I'm not saying the emissions test machine is bad, just saying it might not be working on your truck.

I don't quite understand the rest of your post; have you gone to an auto parts and ask them to plug in their scan tool and see if it communicates with your truck - not if there are codes stored?

Ask Your Own Mazda Question
Customer reply replied 1 year ago
They said the tool ran a code search but they don't know if it's the same way the emissions test communicates with the ecm.
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

If they said that their scan tool did run a code search, then why don't you go back to the test station and ask them about any special dispensations for cases such as yours?

Ask Your Own Mazda Question
Customer reply replied 1 year ago
I wouldn't be asking you if I haven't exhausted absolutely every person I could possibly talk to. I have been to the parts store at least 5 times, replaced the entire computer, ive been to the inspectors 4 times at two different locations and nobody can think about what could be causing this issue... do you have access to the schematics to the DLC port and what is tied into the system? ??
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

Now I'm confused... I thought the issue was the testing station couldn't communicate with your truck's PCM, but the auto parts could. If that's the case, nothing you can do can fix the situation.

Now, if you're saying there is an issue with your truck that is impeding communications with a scan tool, then I could potentially help you with that - only problem would be you not having a scan tool to use during our diagnostic process. Can you borrow one? Also, does the check engine light come on when the ignition is switched on?

Ask Your Own Mazda Question
Mazda Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

I'm sorry, but at this point there's nothing I could contribute that would help you solve your issue. I'll opt out so others may try. Please don't reply until another expert responds or the site will cycle this request back to me.

Ask Your Own Mazda Question
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Mazda
Satisfied Customers: 49,965
Experience: 16 years of experience
Verified

Welcome, I'm Chris (aka Moose).

The prior tech has opted out.

If I understand no scan tool tool will link to your vehicle for scanning and monitoring, correct?

Ask Your Own Mazda Question
Customer reply replied 1 year ago
Correct. I don't have a scan tool myself but I can test each pin and give you readouts to help.
Customer reply replied 1 year ago
The issue is getting a state emissions test. The results just say OBDII failed. Timed out.
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Okay lets start with the wire diagram below.

https://dl.dropboxusercontent.com/u/90220402/DLCmazda.pdf

At the DLC you should get power on orange wire and ground on the black and black white wire. These 2 will power up the scan tool.

Next unplug the PCM and OHM test from the PCM to the DLC the purple, pink/light blue, and tan orange wires. Ohm test them from both ends to make sure they are not broken. Then Ohm test each wire to battery positive and negative to verify there is no continuity from wire shorts. If all tests pass then communication should be able to occur.

Please make sure to select a rating from the top of your screen prior to logging off so the post does not time out.

Thanks Moose.

Ask Your Own Mazda Question
Customer reply replied 1 year ago
Ok, I'll try this out and let you know the results in a little bit.
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Super

Ask Your Own Mazda Question
Customer reply replied 1 year ago
OK, all checked out... All three (purple, pink/lt.blue, tan/orange) had an ohm reading end to end .4-.5. each wire when tested against positive and negative leads had no reading (pcm still disconnected). This is the reason I have been pulling my hair out on this one. after 4 retests I don't know what else to try...
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

According to your tests the only reasons left could be the PCM and the ool being used but you said you replaced the PCM and the emissions place and a parts store could not communicate. Do you know someone with a dealer equivalent tool that can do a data link diagnostics test?

Ask Your Own Mazda Question
Customer reply replied 1 year ago
Unfortunately I don't have access to any sort of tool like this. I called an auto shop ando they wanted 100.00 just to hook it up.
Customer reply replied 1 year ago
Good news! I was able to rent a scan tool from autozone. I have no clue how to use it but I'll see what I can do to figure it out.
Customer reply replied 1 year ago
I don't know exactly how everything works on here but I think its all working properly?? I was able to watch live feed and there were values for all of the sensors. I found an OBD monitor test that had a multitude of options so I ran them all. Most came back with an OK status so I didn't note those, but the ones that came back high I took a picture of so that I could tell you which test it was (if it even matters).
test ID $10 (1/2) test value $FFFF status high
test ID $53 (5/10) value $10DF status high
test ID $53 (6/10) value $00FF status high
test ID $53 (7/10) value $885F status high
test ID $53 (8/10) component ID $08 value $08BF status high
test ID $53 (9/10) component ID $09 value $69FF status high
test ID $53 (10/10) component ID $0A test value $69FF status high
test ID $56 component ID $00 value $1EE8 value highI tried to run a code test but the battery had been unplugged all night, here's what it said .. No powertrain DTCs or freeze frame data is presently stored in the vehicles computer.
Customer reply replied 1 year ago
I have been driving it around to get enough mileage to have all of the sensors respond. But right now I don't have a green light on the o2, had o2, cat and eva.
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

It takes about 2 weeks for the monitors to all complete. Those test ID#s do not cross reference to Ford info. The parts store most likely has a manual or website login for this tool which tells them what those numbers mean.

The point though is you can communicate with the computer so the concern is the testing center, not your vehicle.

Ask Your Own Mazda Question
Customer reply replied 1 year ago
I really wish it were the testing center, but I have taken the vehicle to another city to have it tested and it's still the same problem. I am so lost on what to do. It seems as if it's communicating but it's not when I need it to. Maybe I can run the codes as a Ford ranger? It's basically the same vehicle.
Customer reply replied 1 year ago
ok under a ranger here are the results
catalyst 2 sensor 1 high
egr sensor voltage amplitude-bank 1 sensor 1 low
misfire high 7/10
misfire high 9/10
misfire high 10/10
I have read that voltage spikes and irregularities can cause problems with tools being able to communicate through the OBDII connection. Could any of this be an issue?
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

A trouble code looks like P0301 misfire cylinder #1. The info this generic tool is giving us is not that helpful.

Ask Your Own Mazda Question
Customer reply replied 1 year ago
Sorry, I'm giving you what I can. I have never used this kind of tool before. I'm going to take it up to another shop to see if there is communication. If not I'm right back in the same boat...
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Keep in touch if needed

Ask Your Own Mazda Question
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Hello again Chris here,

I am contacting you because the post has not been closed or rated. We have 7 days to get a post rated before it times out. When a post times out, that means its no longer on my active list (if you reply I never know it.) You have already paid the fees to get this question answered, but it appears your not pleased, or need more help.

Let me help some more. Is there anything else you feel I could offer so you would be pleased with my help. I have the option to call you if that would be better.

Thanks Chris

Ask Your Own Mazda Question
Customer reply replied 1 year ago
Sorry, I've been working graveyards and not been able to get the truck tested yet. I'll be going to another inspection place in the next few days. I'll let you know the results.
Mazda Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Thanks for keeping in touch. Please continue prior to the post timing out and closing on the 22nd

Ask Your Own Mazda Question
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Mazda
Satisfied Customers: 49,965
49,965 Satisfied Customers
Experience: 16 years of experience

Chris (aka- Moose) is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Drew

Drew

Super Mazda Tech.

2,188 satisfied customers

19 yrs. experience. Mazda Senior Certified Tech, with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

49,965 satisfied customers

16 years of experience

mazdamaster577

mazdamaster577

Master Technician

691 satisfied customers

mazda master/shop foreman for 15 years.

George H.

George H.

ASE Certified Technician

457 satisfied customers

15+Years

Ron Z.

Ron Z.

- Mazda Tech -

399 satisfied customers

18+yrs experience. State Inspector and Mazda Diagnostics

Mike Kelly

Mike Kelly

Mazda Mechanic

273 satisfied customers

17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.

Mazda Ed

Mazda Ed

ASE Certified Technician

264 satisfied customers

ASE Certified Mazda Master Technician

< Previous | Next >

Related Mazda Questions
I am looking for a mirror housing and holder for my left
I am looking for a mirror housing and holder for my left side drivers mirror. I have the mirror and the cover for the holder. I need the assembly to hold that which has been broken due to slight judge… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,965 satisfied customers
IT WILL NOT CRANK OR START HAS NO SPARK NOTHING HAPPENS WHEN
IT WILL NOT CRANK OR START HAS NO SPARK NOTHING HAPPENS WHEN THE KEY IS TURNED IT DOESNT MAKE A SOUND BUT IF I JUMP THE STARTER ENGINE ROTATES … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,420 satisfied customers
Crank, no start. Changed the crank sensor still the same.
crank, no start. Changed the crank sensor still the same. smell and found fuel on the plugs. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,965 satisfied customers
Looking for location of TCM. Having someone replace it
Nope. Having someone replace it tonight, but I've only found videos showing where they are located in Mazda 3… read more
Todd M
Todd M
Owner
ASE Certification
1,487 satisfied customers
The front driver front door is giving me problems. After
The front driver front door is giving me problems. After getting out of car and using fob to lock the doors, all the doors lock automatically except the driver front door, this door needs to be locked… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,965 satisfied customers
I replaced my radio and all of a sudden no power to my radio
i replaced my radio and all of a sudden no power to my radio and no dome lights … read more
Mechanic01
Mechanic01
1,724 satisfied customers
Need to change out both axles for this car and axle seals.
Need to change out both axles for this car and axle seals. Need both driver and passenger sides front CV axles and axle seals PART NUMBERS for this car and also repair information or drawings. Anythin… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
I like this2007 mazda rx-8 vin Jm1fe173570208600 I heard
I like this2007 mazda rx-8 vin Jm1fe173570208600 I heard there were some concerns. can you help? … read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
I have a 2003 miata. it's been sitting for a couple months
I have a 2003 miata. it's been sitting for a couple months and when I tried to start it it was dead. I put a battery charger on it and it has a full charge. no lights or anything … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
My 2009 Mazda 6 has a locked steering wheel and won't
My 2009 Mazda 6 has a locked steering wheel and won't start.the only 2 symbols that are out is the red car with key, approximately every 2seconds and a red key with a line through it. How do I get it … read more
Marc Zerbin
Marc Zerbin
Red Seal Auto Service Technician
13 satisfied customers
I just replaced the rear rotors and pads on my daughters
I just replaced the rear rotors and pads on my daughters 2010 mazda 3. Everything went fine until I tried to drive it. The brakes seem to be pocked... although I jacked it up and removed the tires and… read more
Mechanic01
Mechanic01
1,724 satisfied customers
I have 2013 Mazda cx 5 that I have not been able to start in
I have 2013 Mazda cx 5 that I have not been able to start in 4 weeks. Replaced car battery and started fine. Next time I tried to start it nothing happened. Key light on dash red and starter button am… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,965 satisfied customers
My 2013 CX-5 won't start and the battery is not dead. The
My 2013 CX-5 won't start and the battery is not dead. The Security Indicator light continues to flash after I turn off the ignition. … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I have a rough idle on my Mazda b4000 & occasionally the
I have a rough idle on my Mazda b4000 & occasionally the check engine lite will come on for a few minutes & then go off; what is causing this? Also my brake & ABS lite is on constantly even though the… read more
jim
jim
Vocational, Technical or Trade Scho
702 satisfied customers
I was looking at your post about p1525 code and p1540 for
I was looking at your post about p1525 code and p1540 for mazda millennia and you were recommending replacing ABV Vent Solenoid. Should I replace ABV Vacuum Solenoid as well?… read more
Todd M
Todd M
Owner
ASE Certification
1,487 satisfied customers
I have Mazda cx9 9 2008 looking for. module control, Know
I have Mazda cx9 9 2008 looking for.flasher module control … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
2010 cx9 touring drivers side low beam won't work. Took to
2010 cx9 touring drivers side low beam won't work. Took to dealership and they want $1200.00 for a replacement headlight unit. There is no damage to the light unit. Couldn't they just replace the wiri… read more
Todd M
Todd M
Owner
ASE Certification
1,487 satisfied customers
We installed a new battery on my car and accidentally
Hello, we installed a new battery on my car and accidentally installed it the wrong way (reversed the poles) … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x