Cadillac

Cadillac repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I am a repair shop that took on a repair from a neighbor who…

I am a repair...

I am a repair shop that took on a repair from a neighbor who started repairs himself, but could not complete them.

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

I am working on a 2004 Cadillac SRX with the 3.6L v6 (vin code 7). I need to speak with a Cadillac expert, not an automated answer bot please

Mechanic's Assistant: Are you fixing your SRX yourself? What have you tried so far?

Please connect me with an expert so I do not have to repeat myself

Show More
Show Less
Ask Your Own Cadillac Question
Answered in 2 minutes by:
1/22/2018
Gabriel Grey
Gabriel Grey, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 451
Experience: Master Service Technician
Verified

Good afternoon, I hope you are doing great. My name is***** am a Cadillac master technician and I would be happy to assist you with this today.

Let me know what the problem is that you are experiencing and we will take it from there

Ask Your Own Cadillac Question
Customer reply replied 6 months ago
Hi Gabriel,
I am an independent shop owner, but I do not have access to Alldata or Mitchell at the moment and I took on a basket case from my neighbor. The car was in Limp mode mode for TAC problems. The customer had access to GM Bulletin 05-06-04-032C to update the throttle body and connector to the new style because of connector concerns. He did that and it didn't fix the probem, so he bought a pedal sensor assembly but could not put it in himself. That is where I got the car.
I put the pedal sensor in and the readings I get from my scanner show the APP sensor working properly. I can depress the gas pedal from idle to WOT and watch the reading move from 0 to 100% with both APP sensors in agreement.
The problem lies in the TPS. The bulletin gives wire coding to wire in the new connector, but it is in conflict with 2 different wire diagrams I have for this car. I tested continuity for all TB wires to PCM connector and all test fine.
I decided to wire the TB to the schematics I have rather than the bulletin because I have tried both ways and they both trip instant codes, but I have fewer with the diagram.
I am getting a correct 5V reference from the gray wire. The same 5V from the purple wire (TPsensor2), but I am getting 3.3V from the dark green (TPsensor1) wire with KOEO at idle, so my scanner says that the throttle is open 73% at idle with the pedal commanding 5% open.
I replaced the TB the customer installed with another NEW OEM TB, but get the same readings as the other new one.
I am assuming I have a faulty PCM, but never want to assume anything. I want to troubleshoot this thing correctly and fix it properly. I need to know what to test with the correct specs for the tests.
I can clear the codes, but with KOEO, I automatically get P2176 and P2119 back every time.
Customer reply replied 6 months ago
I have the TB wired as follows:
1 yellow tac motor
2 tan low reference
3 gray 5V reference
4 brown tac motor2
5 purple TP 2
6 dark green TP1

Okay great, thank you for the detailed info, that helps out a lot.

You have all of the wires exactly where they should be at the moment, so we know everything is routed correctly.

Based off the reading you are getting I would suspect either an open/damaged wire between the PCM/TB or an incorrect PCM output signal. To test it you can ohm out the wire between the PCM and the Throttle connector, it should be close to 0ohms. If the wire tests good and the problem is still present than that means we have an issue with the PCM logic

Ask Your Own Cadillac Question
Customer reply replied 6 months ago
That is what I assumed, and I have already tested all 6 TB wires to PCM connector1, and they all zero out to 0ohms.
The only thing that concerns me is that because I had the diagram discrepency, I haven't permanently wired in the TB connector so I am able to test and disconnect the PCM wires to the TB.
I am getting the 3.3V directly out of the TPS with the PCM wire disconnected. Is the PCM sending a faulty signal thru the 5V reference wire to provide the 3.3V? In other words, the PCM is reading the 3.3V the same as my volt meter when I disconnect the dark green PCM wire from the TB connector. And as I said, I get the same 3.3V from both new throttle bodies with or without the dark green wire connected

Okay then it sounds like the problem is with the reference voltage signal. It uses pin 6 one the PCM for the signal ground, with that wire disconnected we should still be getting 5V on the green wire, so if it is only putting out 3.3V then we have an issue with our reference voltage coming from the PCM

Ask Your Own Cadillac Question
Customer reply replied 6 months ago
To make sure I understand, PCM uses pin 6 on PCM connector 1 or the TB connector for signal ground? Is there an external ground connection to the engine or frame I can check, or is this an internal PCM failure?
IF the dark green wire is signal ground from the PCM, I should be able to connect volt meter ground to dark green wire, turn on ignition and probe gray wire for 5V reference?
Customer reply replied 6 months ago
I'm thinking it would be best if I called you to walk me thru the tests in real time so there is no confusion. I have to run a quick errand, but can be back in about an hour to do a live call. Will you be available in about an hour?

You are correct, you will want to disconnect the green wire from the PCM connector, then from there ground that wire and turn the ignition on. From there you should see close to 5V, if it is still too low then we have a definite PCM issue.

I am back from lunch now, so I can call if needed

Ask Your Own Cadillac Question
Customer reply replied 6 months ago
I am right back at square 1. I performed the test we described by probing the dark green #6 wire with my voltmeter negative while it was disconnected from the TB, and the gray 5V reference with my positive probe. There was no voltage with the key off, but when I turned the ignition on, engine off, I did get a reading of 4.74V which is consistent with reference voltage. So the PCM is Grounding the circuit with the key on, but I still get 3.3V from the connector side of #6 to the TB when it is or isn't connected to the PCM.
So the TPS is putting out 3.3V whether I use the dark green wire as a ground point or just use the negative battery post as ground. Still confused where to go from here?

Alright after looking over the schematics a bit more I do see what you're saying. If you got a reading of 4.74V then the pcm should be putting out the proper voltage. If it is dropping at the connector that makes me thing there may be a stretched/loose pin inside the connector. It could be a bad/loose wire, but since you already ohm tested the wires I do not think that would be our issue

Gabriel Grey
Gabriel Grey, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 451
Experience: Master Service Technician
Verified
Gabriel Grey and 87 other Cadillac Specialists are ready to help you
Ask your own question now
Cary York
Category: Cadillac
Satisfied Customers: 218
Experience: Auto Tech at Certified Auto Repair
Verified
Phone call session started
Customer reply replied 6 months ago
I think someone tried to call this morning before I made it to work, but I thought the call was a solicitor.
Anyhow, the call would not have helped me anyway because I was not here at work to make any checks on the car.
I am here now and will be here for 4 more hours if you can call me back please.
To recap my situation:
I have the TB wired correctly and there are no wiring shorts to any connector
APP sensor appears to be working correctly
PCM seems to be working correctly
2 NEW OEM TB's are sending 3.3V from connector 6 (dark green) even with the wire disconnected from PCM
Need to know where to check/diagnose next to correct P2119
Please call me back at the number given so I can check the car with you on the phone if necessary
Thank you
Dave
Customer reply replied 6 months ago
I did not receive a call today and am left with no answer to my original question. I was charged $26 for a phone call I have yet to receive. Will I be receiving another call from you or do I need to request another expert? I need to get this car diagnosed properly.

I spoke with owner and we will speak again in the morning to discuss his problem further

Ask Your Own Cadillac Question
Customer reply replied 6 months ago
I was hoping to hear from you today, but was busy on another repair so I did not take the time to call you. I finished the other car and now this Cadillac is my absolute top priority for Monday morning. I will call you as soon as I arrive to the shop and get settled on Monday.
Have a nice weekend
Dave
Sounds good. Thank you
Ask Your Own Cadillac Question
Customer reply replied 6 months ago
I'm not sure why I was hung up on and then sent to voicemail when I called back, but I need to resolve this issue today and I am not getting a response from phone calls or text messages. Are you going to help me, or do I need to request another expert?
Starting to get frustrated here.
Customer reply replied 6 months ago
After talking to customer support, I am reaching out to you once more to see if you are able to assist me with my problem. Can you please respond today so I can move forward. Thank you
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a cadillac mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Gabriel Grey Your Own Question
Gabriel Grey
Gabriel Grey
Gabriel Grey, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 451
451 Satisfied Customers
Experience: Master Service Technician

Gabriel Grey 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:

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

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Jerry Newton

Jerry Newton

Cadillac Technician

1,738 satisfied customers

ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Dave Nova

Dave Nova

Cadillac Technician

1,522 satisfied customers

ASE Master Certification. GM World Class Certification

Gm Tech (Cam)

Gm Tech (Cam)

Cadillac Mechanic

1,090 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

John

John

ASE Certified Technician

941 satisfied customers

ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE

Chris (aka- Moose)

Chris (aka- Moose)

Cadillac Technician

811 satisfied customers

16 years of experience

George H.

George H.

ASE Certified Technician

783 satisfied customers

ASE Master Tech 15+ Years

Don - Mo Lurch

Don - Mo Lurch

Cadillac Technician

705 satisfied customers

GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

< Previous | Next >

Related Cadillac Questions
Is there a recall for the 2010 cadillac srx for timing chain
is there a recall for the 2010 cadillac srx for timing chain issues … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I have a issue with cillinder 5 not having signal. Id like
I have a issue with cillinder 5 not having signal. Id like to know the firing order of the cylinders … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
My instrument cluster, the radio and the front signal light
My instrument cluster, the radio and the front signal light don t works … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
1,047 satisfied customers
Will the fuel pump wiring harness from a 2013 cadillac srx
Will the fuel pump wiring harness from a 2013 cadillac srx fit a 2004 cadillac srx? Can a rat chewed wire cause a fuel pump to short out? … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I am looking at a 2007 SRX with 89K miles on it. Seems to be
I am looking at a 2007 SRX with 89K miles on it. Seems to be well cared for however is there anything specific I should be looking for to avoid trouble?… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
Cadillac CTS: Hi, I have a 2004 Cadillac CTS engine (3.6L VIN
Hi, I have a 2004 Cadillac CTS engine (3.6L VIN 7, 8th digit) that I'm selling. A client just asked me if this engine would fit a 2006 Cadillac CTS also configured with a 3.6L engine. I was searching … read more
Kavey
Kavey
86 satisfied customers
Hi Eric, I have a 2007 Cadillac SRX with 141000 miles on it.
Hi Eric, I have a 2007 Cadillac SRX with 141000 miles on it. My check engine light has been on for a couple of weeks and I'm beginning to hear a rattling noise during aceleration and idiling. Is this … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Cadillac SRX: I have a 2007 Cadillac SRX with 64k miles on
I have a 2007 Cadillac SRX with 64k miles on it that has the check engine light that came on this weekend. It has lost acceleration and gas mileage is awful. When I start it the smell of raw gas if ve… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Cadillac CTS: returned from a 2,000 mile trip to hear this
returned from a 2,000 mile trip to hear this rattling in the engine. stopped immediately and checked the oil and it needed 3 quarts! just had had the car serviced before I left. the car is a 2005 with… read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 satisfied customers
Cadillac SRX: CAN YOU TELL ME WHAT NUMBERS IN THE VIN TELL
CAN YOU TELL ME WHAT NUMBERS IN THE VIN TELL WEATHER IT IS A V6 OR V8, BASIC, LUXURY, PREFORMANCE, AND WHAT OPTIONS IT HAS INSTALLED. I AM IN THE MARKET FOR A 2004 TO 2007 SRX, AND MOST DEALER ADDS DO… read more
George H.
George H.
ASE Certified Technician
Associate Degree
783 satisfied customers
Cadillac: I am trying to purchase a used Cadillac SRX (2004
I am trying to purchase a used Cadillac SRX (2004 to 2008), I currently drive a 1995 GMC Jimmy with 290,000 miles on it. My GMC has NEVER had any major engine or drive train problems at all. What kink… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Cadillac cts: i have an 05 cts that came to me running with
i have an 05 cts that came to me running with the check engine and the theft det lite on checked the engine lite and erased the codes and now it wont start.any help… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
2005 STS: experienced transmition shudder during normal accel..shift
I have a 2005 STS with 47,000 miles. Since 30,000 miles I have experienced transmition shudder" during normal accel. and the shift points are not always at the correct time. I am looking for a tech bu… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2004 SRX: cylinder..park and re-started..slowing down..accelerating
2004 SRX 6 cylinder front wheel drive only. Several times recently, car quit while in motion, stopped vehicle, put in park and re-started. Now, car is jerking when slowing down or accelerating. Clnkin… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2004 cadillac srx: V6..35-40..the transmition until a shift
I have a 2004 Cadillac SRK V6 and at approximate speed of 35-40 there is a shutter in the transmition until a shift takes place. Can you tell me what that shutter is and how to fix it. Thank you Jerry… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2006 cadillac srx wont start, motor turns over, wont fire.
2006 cadillac srx won't start, motor turns over, won't fire. p codes p009,p0017,p0011,p0496,.p0017,p0018,p0019… read more
Dave Nova
Dave Nova
Cadillac Technician
Associate Degree
1,522 satisfied customers
2008 SRX: Six Cylinder...Lately on cold start up, feels..warranty
I have a 2008 SRX with the Six Cylinder...Lately on cold start up, feels like engine is rocking. Has set no codes. This concerns me since the warranty is getting ready to expire… read more
Billy
Billy
Shop Foreman
Vocational, Technical or Trade Scho
355 satisfied customers
2004 srx: v8..cam..dropped cylinders, fixed a loose coil pin
my 2004 srx northstar v8 with 45,000 miles stumbles when cold and under 2000 rpm. This started after dealer replaced valve cover gaskets and cam actuators. They then updated diagnostic software, found… read more
Wicked Wrench
Wicked Wrench
Automotive Technology Instructor
Associate Degree
205 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