Where is the fuse on a freightliner Columbia ECM?

In the battery box, 2 in line fuses, behind the batteries . The fuse for the ECM is tied/taped into the wire harness.

What is ECM on Freightliner?

A truck Engine Control Module , or the ECM, is often times referred to as the engine's “brain”. The ECM is a computer that is attached to the side of the engine with functions such as receiving data from different sources on the truck (input) as well as reporting events or conditions (output).

Where is the ECM on a 2005 Freightliner Columbia?

Hi. Thanks for requesting me and asking your question! I will try and help you out. The ECM for the engine is located on the drivers side of the engine .

What is the no eng code on the freightliner columbia?

When you get that no engine code it means that the ECM is not communicating . Check between your battery box and your ECM for an in-line fuse holder that might have a blown in-line fuse or a problem with the wiring in that circuit. Look for any corrosion or damage in the wires or connector pins.

What are the symptoms of a bad ECM fuse?

The Most Common ECM Failure Symptoms Your 'Check Engine' Light Is On. Your car's check engine light is a sort of catch-all that many people ignore. ... Your Car Won't Start. ... Your Engine Stutters or Misfires. ... Sudden Drop in Fuel Economy. ... Sudden Loss of Acceleration. ... Your Engine Shuts Off for No Reason. ... Rough or Irregular Shifting.

How do I know if my ECM is out?

symptoms of a bad ecm Check Engine Light Turns On. ... Engine Stalling or Misfiring. ... Engine Performance Issues. ... Car Not Starting. ... Poor Fuel Economy. ... Your Engine shuts off for no reason. ... Flooded Engine. ... Increased Emissions. More items...

How do you know if your ECM is bad in semi truck?

Unexpected Fuel Economy Drop If your truck's gas mileage plunges in the time span of around 2 weeks your ECM or sensor attached to it could possibly be causing the problem. If your gas mileage falls throughout the course of a few years it would be best to see your mechanic since this likely wouldn't be from an ECM.

What causes a faulty ECM?

Corrosion, Moisture, and Solenoid Damages Corrosion on the wiring harness and increased moisture are frequent culprits behind faulty ECMs.

What is the code for no communication with ECM?

The U0100 code is a diagnostic trouble code (DTC) that stands for Lost Communication with ECM/PCM.

Where is the diagnostic port on a Freightliner Columbia?

Important Notes on Century-Columbia-Glider This design covered a number of years and variations, though the general install remained the same. The diagnostic port is behind the driver's seat .

Is ECU and ECM fuse the same?

ECM stands for Engine Control Module, and ECU is short for Engine Control Unit. These two acronyms represent the same component and are used interchangeably .

How do I reset my ECM fuse?

By Removing the ECM Fuse Locate the fuse box and open the cover. Find the ECM fuse on the fuse diagram. Carefully remove the ECM fuse and wait for 10-15 minutes. Reinsert the ECM fuse into its original location.

What is the ECM 1 fuse?

So the ECM1 fuse only powers the engine control module . So if that fuse is blowing it means 1 of 2 possible scenarios is happening. There is either a wire from the fuse box to the ECM shorting out causing the fuse to blow, or the ECM is overheating and drawing too much amperage causing the fuse to blow.

Freightliner columbia ecm problem (2024)

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bruce25, May 19, 2017.

Page 1 of 3

May 19, 2017#1
bruce25Light Load Member
143
86
Apr 16, 2014

0

Check engine and engine protect came up truck shuts down it will crank but wont start cluster displays 0 volts but the truck has power inside
No eng
Sid 254 fail 07
Cdu 219
Fail 04
Sid 010 fail 02
I have tried everything checked fuses pdm box battery fuses. Checked cables i am oit of ideas is the ecm dead?
bruce25,May 19, 2017
bruce25,May 19, 2017
#1
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May 20, 2017#2
xsetraRoad Train Member
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Aug 21, 2011

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What motor. What year?
xsetra,May 20, 2017
xsetra,May 20, 2017
#2
May 21, 2017#4
bruce25Light Load Member
143
86
Apr 16, 2014

0

Series 60 12.7 year 2003 i checked harness pins for volts and the big pin close to cab has 4 pins with 12 volts and a 5 large pin cable above it has two pins with 12 volts. So ecm is getting power but dash is not reading anything from it shows 0 volts no eng with alot of faults and also check eng and protect is constantly on once you turn the key. Also dash shows option with EC with lines across seems like there is nothing coming out of ecm. I took the ecm off opened it saw sign of water condensation
bruce25,May 21, 2017
bruce25,May 21, 2017
#4
Oldironfan Thanks this.
May 21, 2017#4
bahaRoad Train Member
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Jul 25, 2013
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Go behind drivers seat and find rear fuse panel, pull all and clean corr. off all find the water leak and fix all seams above breaker panel with auto body sealer, has the wiring harness from L side of firewall to motor ever been replaced?
baha,May 21, 2017
baha,May 21, 2017
#4
Oldironfan Thanks this.
May 21, 2017#5
Fast Track MechanicBobtail Member
13
5
May 16, 2017

0

Cant find your fault codes on any of these links. see if you have better luck
Fault Code Web Links
there is an abs fault code for sid 254 fail 07 but that wont stop your truck from starting
I found this helpful answer from a technician on JustAnswer.com
TRS or SRS sensor can prevent engine starting
Sounds silly but no fuel will prevent engine from starting. make sure the fuel pickup in the tank isnt broken
coolant temp, coolant level, oil pressure will shut you down. unplug those sensors and see if it will start.(turns the code into open circuit and therefore a check engine not a stop engine fault code. obviously if it starts switch it straight off incase you do have an oil pressure problem not just faulty wiring or sensor)
make sure you have pwr and earth to ecm see attached pics
Fast Track Mechanic,May 21, 2017
Fast Track Mechanic,May 21, 2017
#5
Oldironfan Thanks this.
May 21, 2017#7
bruce25Light Load Member
143
86
Apr 16, 2014

0

You mean panel on the left side of the driver seat? If so i checked it and it looks good. Harness has never been to my knowledge not sure if it was before i purchased it. I did check the harness it looks hood i saw no broken wires pins on the ecm wired to get 12v
bruce25,May 21, 2017
bruce25,May 21, 2017
#7
Oldironfan Thanks this.
May 21, 2017#7
bruce25Light Load Member
143
86
Apr 16, 2014

0

bruce25,May 21, 2017
bruce25,May 21, 2017
#7
May 21, 2017#8
bahaRoad Train Member
4,137
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Jul 25, 2013
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Did you pull all the relays inside the fuse box in the sleeper? it may be on the other side of pass. door but the relays having green on the prongs can do what you are seeing?
baha,May 21, 2017
baha,May 21, 2017
#8
May 21, 2017#10
bruce25Light Load Member
143
86
Apr 16, 2014

0

I pulled the relays in the fuse box that sits under the dash on the pass side and i didnt see any corrosion. I can recheck again and see if i missed anything. Which relay is for ecm i checked ecm fuse and its good
bruce25,May 21, 2017
bruce25,May 21, 2017
#10
May 21, 2017#10
kemosabi49Trucker Forum STAFFStaff Member
10,072
41,878
Jan 13, 2013
SW Arkansas

0

Had that happen to me on a '03. Ended up being the small wire that goes to the batteries was not connected. Had broke and fell behind the batteries.
kemosabi49,May 21, 2017
kemosabi49,May 21, 2017
#10
Oldironfan Thanks this.

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Freightliner columbia ecm problem (2024)

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xsetraRoad Train Member

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