Рет қаралды 9,905
WARNING!!: ⚠️⚠️⚠️
Always use the proper tools and safety equipment to perform this job.
Failure to perform the job correctly can result in personal injury or vehicle damage.
Don't do this job if you think you don't have the experience or the equipment to do this job correctly. REMEMBER SAFETY FIRST!
Warning!!! ⚠️⚠️⚠️
This video is just a demonstration of the labor to do to perform this job, the results may vary.
Also, the damage found can be greater that expected and it can result in a massive engine failure.
This video contains advance technician information.
this present codes are related to a wiring problem
the way to fix this kind of problem is by replacing the wiring harnesses of the SCR box.
codes that were present
SPN 3361 FMI 31 DEF UNIT ERROR
this code refers to a incorrect signal to the detected by the ACM from the DEF injector
possible causes are: faulty DEF injector, bad SCR box wiring, bad ACM to SCR box wiring, faulty ACM.
SPN 5246 FMI 15 16 REGULATORY FAULT IGNORED DERETE ON PENDING
this codes refers to a faulty which condition is active and it needs validation from the ACM to be cleared
possible causes are: an active emission fault
SPN 3510 FMI 4 ACM SENSOR SUPPLY 2 SHORT TO GROUND
this code refers to a faulty wiring harness or a bad sensor applying negative power directly to the sensor supply lines
NOTE: FOR 2017 AND UP THIS CODES REFERS TO THE SCR BOX WIRING AREA
FOR 2011 - 2016 THIS CODE REFERS TO THE ENGINE SENSOR HARNESS AREA
possible causes are:
bad ACM to SCR wiring 2017 and up
bad SCR box wiring 2017 and up
bad SCR temperature or pressure sensor 2017 and up
bad MCM engine wiring harness 2011 - 2016
bad engine temperature or pressure sensor 2011 - 2016
SPN 4334 FMI 4 DEF PRESSURE SENSOR CIRCUIT FAILED LOW
this code refers to the application or direct negative power to the mentioned sensor
possible causes are: bad DEF pressure sensor, bad SRC box harness, ACM to SCR wiring, bad ACM
this information is going to be similar all this truck and engines
freightliner wester star mercedes benz
DD13 DD15 DD16 OM471 OM472 OM473
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