Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

2004 Kenworth with a C15 cat single turbo MBN20934. cranks…

Customer Question
2004 Kenworth with a...

2004 Kenworth with a C15 cat single turbo MBN20934. cranks but wont' start. Changed the fuel pump, checked fuel pressure, 95psi. Checked the power to the ECM, pin 70 12V 63/65/67 grounds show good. constant power is good as well.

Mechanic's Assistant: What is the complete model and serial number of your machine?

Don't get any check eng light when i turn on the key, and don't get any flash codes when i toggle the cruise control switch. IDK what else to check. i assumed ECM must be bad. CAT want 5000$ for a new one. I thought i'd try a rebuilt one from GoECM out of Grande Prairie Texas. Installed it today, but still exactly the saem so maybe i got two bad ECM?

Mechanic's Assistant: Anything else you want the Equipment Mechanic to know before I connect you?

1XDDB9X54R973138

Submitted: 2 years ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 23 minutes by:
10/10/2019
Technician: Cat Man, Cat Engine Expert replied 2 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.If the yellow check engine light does not come on when the key is turned to the on position and the engine will not start, there are only 2 things that can cause this.The first and most common is the engine ECM is not getting the correct power and ground to function. The ECM should have power on pins 52, 53, and 70 of the rear most ECM connector. This is the truck side harness connector. 70 is the key switch wire. The grounds are on pins 65 and 67. You can remove the connector and check for power on these pins. If you do not have power on these pins, you most likely have a blown fuse in the electrical system. I would check all fuses first.If you do have correct power and ground to the ECM, you most likely have a failed ECM. I have seen this many times over the years. To confirm the ECM is bad, you would need to install a known good ECM on the engine or you can take the ECM to the dealer to be tested. Unfortunately the ECM cannot be repaired. Replacement is the only option. I am sorry. I wish I had better news.Please reply back if you need more help or have more questions. I am happy to assist.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 2 years ago
ok. So the ECM i got from this other place is probably junk? I'll take the original ecm to cat and see they can tell me if it has failI've checked all the pins, and the power and grounds are all good.
Technician: Cat Man, Cat Engine Expert replied 2 years ago
10-4
Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Cat Man Your Own Question
Cat Man
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
10,344 Satisfied Customers
Experience: I am ASE Master Truck Certified.

Cat Man is online now

Related Medium and Heavy Trucks Questions
My dash says no eng, cab and battery box fuse is good, ecm
My dash says no eng, cab and battery box fuse is good, ecm is getting power and ground, dash reads 0 voltage. What could it be? 06 freightliner columbia with a cat c15 mxs engine… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
64 satisfied customers
2005 Columbia crank no start. 2005 Freightliner Columbia.
crank no start. No eng Sid 254 fail 07 code on dash. Cat c15 engine. Have power on pin 52 and 53. Have ground on 65 and 67. Pin 70 is hot with key in run position.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a sterling with a C 12 cat in it went to turn a
I have a sterling with a C 12 cat in it went to turn a corner in the truck just died cranks over just fine it has plenty of prime in the fuel system it starts and runs of either but dies it will not s… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
C15 reads no eng, wont fire,gives code 140. power at pins 70
c15 reads no eng, wont fire,gives code 140. power at pins 70 52 53 and i thunk 55, but also has power at pins 63 65 67 and 69 … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
64 satisfied customers
I have 2003 kenworth t300 with cat 3126 will not start was
Good morning I have 2003 kenworth t300 with cat 3126 will not start was running just died no voltage at heui pump tach inop no codes … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2006 International 9400i, CAT C15 Acert. Turned truck off
2006 International 9400i, CAT C15 Acert. Turned truck off last night with no issues, cranks over but no start this morning. When cranking no tach signal, no oil pressure signal, no water temp signal. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2004 Peterbilt CAT C15 Engine serial NO. MBN16913 crank no
2004 Peterbilt CAT C15 Engine serial NO. MBN16913 crank no start, no tach movement, 60psi fuel pressure while cranking, i have key activated power at pin 70,52,53 of the p1 ECM connector and ground at… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
My 2005 Pete with a C15 won't start. I get no clicking in my
My 2005 Pete with a C15 won't start. I get no clicking in my valve covers for the fuel rail system. Ecm checks out good. I have fuel pressure after cranking in the return behind filter. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Mbn cat in a Kenworth just shut down I'm going down the road
mbn cat in a Kenworth just shut down I'm going down the road and it just shut down the speedometer and the tach quit working the engine light does not come on all the rest of the lights come on with t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
C15 acert in 9900 int crank no start, Changed batteries,
Volt oilpr watertemp rpm and speedom not doing right after ign on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Truck is a 2004 FL with C7 Cat, engine cranks but won't
Truck is a 2004 FL with C7 Cat, engine cranks but won't start. After several tries it will start, run for 5 to 10 minutes, and then shut off as if you turned the key off. I have replaced the timing se… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1997 Louisville Dump with a 3126. I am installing a
I have a 1997 Louisville Dump with a 3126. I am installing a motor from a 99 Sterling 3126. I have the 40 to 70 pin adapter but get no power to my ecm Plug. I have checked power coming direct from Bat… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
When drivers door is opened and closed it will shut off. Do
When drivers door is opened and closed it will shut off . Do you have any ideas of what the problem would be. It is a 387 Peterbilt 2005 has a c15 Cat motor.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a c15 2007 same deal fuel delivery is good will crank
Have a c15 2007 same deal fuel delivery is good will crank over just will not fire up owner drove truck to location shut it off did his farming and truck will not crank up now… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1995 freightliner fld it had a 3406 e engine I change
I have a 1995 freightliner fld it had a 3406 e engine I change that motor to a c15 I had to used a harness adapter . The engine will run off of start fluid but once it is gone it dies out . I don't th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2009 c15 powering a drill rig. Shut down during normal operations.
2009 c15 powering a drill rig. Shut down during normal operations. Code is j1939 engine failure. Engine turns over ,wil not start… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Truck died, tried to start, will crank but not fire. 07 T800
Truck died, tried to start, will crank but not fire. 07 T800 CAT acert C15 The hour meter trip meter and odometer turn from numbers to dashes when you turn the key on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2003 Cat C-16 in a Kenworth W900L. It wont start,
I have a 2003 Cat C-16 in a Kenworth W900L. It won't start, the check engine light doesn't come on. I thought I would check for voltage at the ECM. Which plug and which terminal is it?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 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.

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:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,344 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

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