17-09-2021

Spn 4374 Fmi 0

SPN FMI ACM2.1 FAULT CODE. 4374 0 Under pressurized DEF system 4374 1 Over pressurized DEF system 4374 3 pump speed signal over measurement range. Source Module SPN FMI Description; ECU: 27: 0: EGR Valve Failed to Attain Closed Position: Engine Exhaust Gas Recirculation 1 Valve Position Data Valid But Above Normal Operational Range - Most Severe Level; MU ist set if EGR valve could not reach the close position. 112-13 spn 4364-fmi 18 - ghg14. TSB Number: 111-13 NHTSA Number: 10140872 TSB Date: January 11, 2013 Date Added to File: June 11, 2018 Failing Component: Engine And Engine Cooling:Exhaust System Summary: 111-13 spn 4374/fmi 0, 1, 3, 4 - ghg14. DEUTZ EMR3 - Diagnostic trouble codes DEUTZ Service Information Systems 3/20 25-Jan-2006 Engine protection Air filter condition Pressure loss above target range with system reaction zz11 AirFltSysReac 1-3-6 107 1, 11 z Battery voltage Above target range with system reaction zz23 BattCDSysReac 3-1-8 168 2, 11 z Charge air pressure Outside target range with system reaction zz33 BPSCDSysReac 2-2. 4374/0 under pressurized diesel exhaust fluid system Leave a reply EPA07/10/GHG14 DDEC VI/10 Electronics and Troubleshooting Manual (DDC-SVC-MAN-0084) 505 SPN 4374 (ACM) (GHG14) 505.1 SPN 4374/FMI 0 – GHG14.

Covers: Detroit Diesel DD13, DD15, DD16 engines

GHG17 only (2017+)

Type: Service Manual
Language: English
Pages: 3,104
Format: PDF file
File size: 129mb
Features: Bookmarked, searchable, printable
Compatibility: Windows/Mac/Tablet

This downloadable PDF manual contains over 3,000 pages of technical information for troubleshooting and diagnosing Detroit DD13, DD15 and DD16 GHG17 diesel engines. In this troubleshooting manual you will find detailed symptom and code-based diagnostics and step by step procedures to remedy the issue. This is the same manual used by professional diesel techs and may require diagnostic software to complete some diagnostic procedures (not included). View the manual on your computer/tablet or print off select pages for the shop.

Please note this manual contains troubleshooting procedures only — GHG17 engine service manual and GHG17 wiring diagrams sold separately.

Contents:

Safety Precautions
Electrical System
Aftertreatment SCR Circuit Diagrams
Diagnostic Tests – Two-Filter Fuel System
Diagnostic Tests
Contaminated Fluids
How to Retrieve DDEC Reports
Electrical Connector Repair/Replacement
Symptom Diagnostics – Air Compressor
Symptom Diagnostics – ATD Checklist
Symptom Diagnostics – Belt Coming Off
Symptom Diagnostics – Combustion Gas in Coolant
Symptom Diagnostics – Coolant Loss
Symptom Diagnostics – Engine Brake
Symptom Diagnostics – Engine Oil Leaks
Symptom Diagnostics – Fluid in the Aftertreatment
Symptom Diagnostics – High Crankcase Pressure
Symptom Diagnostics – Regeneration
Symptom Diagnostics – Oil Present at the Turbocharger Compressor Housing
Symptom Diagnostics – Hard Start/No Start
Symptom Diagnostics – Noise
Symptom Diagnostics – Low Engine Compression
Symptom Diagnostics – Noisy One-Box Aftertreatment
Symptom Diagnostics – EGR Slow Learn Routine
Symptom Diagnostics – Optimized Idle
Symptom Diagnostics – Low Engine Coolant Temperature
Symptom Diagnostics – Low Wheel Horsepower
Symptom Diagnostics – Excessive Oil Consumption
Symptom Diagnostics – Excessive Exhaust Smoke
Symptom Diagnostics – Rod Out of the Block
Symptom Diagnostics – Rough Running or Stalling
Engine Manufacturer Diagnostics
Virtual Technician
SPN CODE DIAGNOSTICS
- SPN 51 (MCM)
- SPN 70 (CPC)
- SPN 84 (CPC)
- SPN 84 (CPC3)
- SPN 84 (MCM)
- SPN 84/FMI 13
- SPN 84/FMI 19
- SPN 84/FMI 21
- SPN 91 (CPC)
- SPN 91 (CPC3)
- SPN 94 (MCM)
- SPN 96 (CPC)
- SPN 96 (MCM)
- SPN 97 (MCM)
- SPN 98 (CPC)
- SPN 100 (MCM)
- SPN 100 (CPC)
- SPN 103 (MCM)
- SPN 107 (CPC)
- SPN 108 (ACM)
- SPN 108 (MCM)
- SPN 110 (MCM)
- SPN 110 (CPC)
- SPN 110 (ACM)
- SPN 111 (CPC)
- SPN 111 (CPC3)
- SPN 120 (CPC)
- SPN 157 (MCM)
- SPN 158 (CPC)
- SPN 158 (MCM)
- SPN 164 (MCM)
- SPN 168 (MCM)
- SPN 168 (ACM)
- SPN 168 (CPC)
- SPN 168 (CPC3)
- SPN 171 (CPC)
- SPN 171 (CPC3)
- SPN 171 (ACM)
- SPN 171 (MCM)
- SPN 174 (MCM)
- SPN 175 (MCM)
- SPN 188 (MCM)
- SPN 190 (ACM)
- SPN 190 (MCM)
- SPN 191 (CPC)
- SPN 247 (CPC)
- SPN 411 (MCM)
- SPN 513 (ACM)
- SPN 520 (MCM)
- SPN 523 (CPC)
- SPN 523 (MCM)
- SPN 524 (CPC)
- SPN 525 (CPC)
- SPN 527 (CPC)
- SPN 556 (CPC)
- SPN 558 (CPC)
- SPN 558 (CPC3)
- SPN 569 (CPC)
- SPN 571 (CPC)
- SPN 596 (CPC)
- SPN 597 (CPC)
- SPN 598 (CPC)
- SPN 599 (CPC)
- SPN 600 (CPC)
- SPN 602 (CPC)
- SPN 609 (CPC)
- SPN 625 (MCM)
- SPN 625 (CPC)
- SPN 625 (ACM)
- SPN 628 (CPC)
- SPN 629 (CPC)
- SPN 630 (CPC)
- SPN 630 (CPC3)
- SPN 636 (MCM)
- SPN 639 (CPC)
- SPN 647 (MCM)
- SPN 651 (MCM)
- SPN 652 (MCM)
- SPN 653 (MCM)
- SPN 654 (MCM)
- SPN 655 (MCM)
- SPN 656 (MCM)
- SPN 667 (CPC)
- SPN 677 (MCM)
- SPN 701 (CPC)
- SPN 702 (CPC)
- SPN 703 (CPC)
- SPN 704 (CPC)
- SPN 705 (CPC)
- SPN 705 (MCM)
- SPN 706 (CPC)
- SPN 707 (CPC)
- SPN 708 (CPC)
- SPN 709 (CPC)
- SPN 710 (CPC)
- SPN 710 (MCM)
- SPN 711 (CPC)
- SPN 712 (CPC)
- SPN 713 (CPC)
- SPN 714 (CPC)
- SPN 715 (CPC)
- SPN 716 (CPC)
- SPN 723 (MCM)
- SPN 748 (CPC3)
- SPN 904 (CPC)
- SPN 924 (CPC)
- SPN 925 (CPC)
- SPN 926 (CPC)
- SPN 961 (MCM)
- SPN 970 (CPC)
- SPN 972 (CPC)
- SPN 973 (CPC)
- SPN 974 (CPC)
- SPN 979 (CPC)
- SPN 986 (CPC)
- SPN 1033 (ACM)
- SPN 1033 (MCM)
- SPN 1071 (MCM)
- SPN 1072 (MCM)
- SPN 1073 (MCM)
- SPN 1077 (MCM)
- SPN 1089 (CPC)
- SPN 1121 (CPC)
- SPN 1136 (MCM)
- SPN 1163 (MCM)
- SPN 1172 (MCM)
- SPN 1231 (ACM)
- SPN 1231 (MCM)
- SPN 1237 (CPC)
- SPN 1243 (CPC)
- SPN 1322 (MCM)
- SPN 1323 (MCM)
- SPN 1324 (MCM)
- SPN 1325 (MCM)
- SPN 1326 (MCM)
- SPN 1327 (MCM)
- SPN 1328 (MCM)
- SPN 1482 (CPC)
- SPN 1483 (CPC3)
- SPN 1484 (CPC)
- SPN 1590 (CPC)
- SPN 1592 (CPC)
- SPN 1623 (CPC)
- SPN 1624 (CPC)
- SPN 1624 (CPC3)
- SPN 1636 (MCM)
- SPN 1637 (MCM)
- SPN 1639 (MCM)
- SPN 1659 (MCM)
- SPN 1663 (CPC)
- SPN 1669 (ACM)
- SPN 1681 (CPC)
- SPN 1716 (CPC)
- SPN 1761 (ACM)
- SPN 1814 (CPC)
- SPN 1845 (CPC)
- SPN 2000 (MCM)
- SPN 2003 (CPC)
- SPN 2011 (CPC)
- SPN 2017 (CPC)
- SPN 2023 (CPC)
- SPN 2025 (CPC)
- SPN 2033 (CPC)
- SPN 2042 (CPC)
- SPN 2049 (CPC)
- SPN 2596 (CPC)
- SPN 2623 (CPC)
- SPN 2623 (CPC3)
- SPN 2630 (MCM)
- SPN 2631 (MCM)
- SPN 2646 (CPC)
- SPN 2659 (MCM)
- SPN 2791 (MCM)
- SPN 2797 (MCM)
- SPN 2798 (MCM)
- SPN 2882 (CPC)
- SPN 2900 (CPC)
- SPN 3031 (ACM)
- SPN 3056 (ACM)
- SPN 3057 (ACM)
- SPN 3058 (MCM)
- SPN 3061 (MCM)
- SPN 3187 (CPC)
- SPN 3187 (CPC3)
- SPN 3216 (ACM)
- SPN 3216 (MCM)
- SPN 3217 (ACM)
- SPN 3223 (ACM)
- SPN 3226 (ACM)
- SPN 3227 (ACM)
- SPN 3236 (ACM)
- SPN 3238 (ACM)
- SPN 3242 (ACM)
- SPN 3246 (ACM)
- SPN 3250 (ACM)
- SPN 3251 (ACM)
- SPN 3353 (CPC)
- SPN 3361 (ACM)
- SPN 3363 (ACM)
- SPN 3461 (CPC)
- SPN 3464 (MCM)
- SPN 3471 (MCM)
- SPN 3480 (MCM)
- SPN 3482 (MCM)
- SPN 3490 (ACM)
- SPN 3509 (ACM)
- SPN 3509 (MCM)
- SPN 3509 (CPC3)
- SPN 3510 (CPC)
- SPN 3510 (ACM)
- SPN 3510 (MCM)
- SPN 3511 (ACM)
- SPN 3511 (MCM)
- SPN 3511 (CPC)
- SPN 3511 (CPC3)
- SPN 3512 (ACM)
- SPN 3512 (MCM)
- SPN 3556 (ACM)
- SPN 3563 (MCM)
- SPN 3597 (CPC3)
- SPN 3597 (MCM)
- SPN 3597 (ACM)
- SPN 3598 (MCM)
- SPN 3599 (ACM)
- SPN 3599 (MCM)
- SPN 3606 (CPC)
- SPN 3609 (ACM)
- SPN 3610 (ACM)
- SPN 3645 (CPC)
- SPN 3659 (MCM)
- SPN 3660 (MCM)
- SPN 3661 (MCM)
- SPN 3662 (MCM)
- SPN 3663 (MCM)
- SPN 3664 (MCM)
- SPN 3695 (CPC)
- SPN 3696 (CPC)
- SPN 3711 (MCM;ACM)
- SPN 3713 (ACM)
- SPN 3716 (MCM)
- SPN 3719 (ACM)
- SPN 3719 (CPC)
- SPN 3720 (ACM)
- SPN 3720 (MCM)
- SPN 3840 (CPC)
- SPN 3841 (CPC)
- SPN 3842 (CPC)
- SPN 3843 (CPC)
- SPN 3844 (CPC)
- SPN 3845 (CPC)
- SPN 3846 (CPC)
- SPN 3847 (CPC)
- SPN 3848 (CPC)
- SPN 3849 (CPC)
- SPN 3850 (CPC)
- SPN 3851 (CPC)
- SPN 3852 (CPC)
- SPN 3853 (CPC)
- SPN 3854 (CPC)
- SPN 3855 (CPC)
- SPN 3856 (CPC)
- SPN 3857 (CPC)
- SPN 3858 (CPC)
- SPN 3859 (CPC)
- SPN 3860 (CPC)
- SPN 3861 (CPC)
- SPN 3862 (CPC)
- SPN 3863 (CPC)
- SPN 3864 (CPC)
- SPN 3865 (CPC)
- SPN 3866 (CPC)
- SPN 3867 (CPC)
- SPN 3868 (CPC)
- SPN 3869 (CPC)
- SPN 3870 (CPC)
- SPN 3871 (CPC)
- SPN 3872 (CPC)
- SPN 3873 (CPC)
- SPN 3936 (ACM)
- SPN 3948 (CPC)
- SPN 4041 (CPC)
- SPN 4077 (MCM)
- SPN 4193 (MCM)
- SPN 4206 (CPC)
- SPN 4207 (CPC)
- SPN 4257 (MCM)
- SPN 4258 (MCM)
- SPN 4331 (ACM)
- SPN 4332 (ACM)
- SPN 4334 (ACM)
- SPN 4354 (ACM)
- SPN 4355 (ACM)
- SPN 4356 (ACM)
- SPN 4357 (ACM)
- SPN 4360 (ACM)
- SPN 4363 (ACM)
- SPN 4364 (ACM)
- SPN 4374 (ACM)
- SPN 4375 (ACM)
- SPN 4752 (MCM)
- SPN 4765 (MCM)
- SPN 4814 (MCM)
- SPN 5016 (ACM)
- SPN 5017 (ACM)
- SPN 5018 (ACM)
- SPN 5298 (ACM)
- SPN 5319 (ACM)
- SPN 5323 (MCM)
- SPN 5357 (MCM)
- SPN 5358 (MCM)
- SPN 5359 (MCM)
- SPN 5360 (MCM)
- SPN 5361 (MCM)
- SPN 5362 (MCM)
- SPN 5363 (MCM)
- SPN 5395 (MCM)
- SPN 5397 (ACM)
- SPN 5418 (MCM)
- SPN 5435 (ACM)
- SPN 5443 (ACM)
- SPN 5444 (MCM)
- SPN 5488 (ACM)
- SPN 5540 (MCM)
- SPN 5569 (ACM)
- SPN 5571 (MCM)
- SPN 5588 (MCM)
- SPN 5741 (ACM)
- SPN 5747 (ACM)
- SPN 5765 (MCM)
- SPN 5841 (ACM)
- SPN 5927 (MCM)
- SPN 7384 (MCM)
- SPN 7385 (MCM)
- SPN 7386 (MCM)
- SPN 7387 (MCM)
- SPN 7388 (MCM)
- SPN 7389 (MCM)
- SPN 520199 (IPPC)
- SPN 520200 (IPPC)
- SPN 520203 (IPPC)
- SPN 520203 (CPC3)
- SPN 520205 (CPC3)
- SPN 520208 (IPPC)
- SPN 520210 (IPPC)
- SPN 520211 (IPPC)
- SPN 520212 (IPPC)
- SPN 520213 (IPPC)
- SPN 520215 (IPPC)
- SPN 520217 (IPPC)
- SPN 520219 (IPPC)
- SPN 520228 (CPC3)
- SPN 520229 (IPPC)
- SPN 520229 (CPC3)
- SPN 520230 (IPPC)
- SPN 520232 (ACM)
- SPN 520253 (MCM)
- SPN 520261 (MCM)
- SPN 520268 (MCM)
- SPN 520280 (MCM)
- SPN 520281 (MCM)
- SPN 520282 (MCM)
- SPN 520286 (MCM)
- SPN 520287 (MCM)
- SPN 520296 (MCM)
- SPN 520321 (MCM)
- SPN 520322 (MCM)
- SPN 520323 (ACM)
- SPN 520328 (ACM)
- SPN 520329 (ACM)
- SPN 520332 (ACM)
- SPN 520348 (ACM)
- SPN 520349 (ACM)
- SPN 520352 (ACM)
- SPN 520353 (ACM)
- SPN 520357 (ACM)
- SPN 520358 (ACM)
- SPN 520359 (ACM)
- SPN 520360 (ACM)
- SPN 520361 (ACM)
- SPN 520362 (ACM)
- SPN 520363 (ACM)
- SPN 520364 (ACM)
- SPN 520365 (ACM)
- SPN 520366 (ACM)
- SPN 520367 (ACM)
- SPN 520368 (ACM)
- SPN 520371 (ACM)
- SPN 520372 (ACM)
- SPN 520378 (ACM)
- SPN 520381 (ACM)
- SPN 521005 (CPC3)
- SPN 521001 (CPC3)
- SPN 521005 (MCM)
- SPN 521002 (CPC3)
- SPN 521006 (CPC3)
- SPN 521007 (CPC3)
- SPN 521008 (CPC3)
- SPN 521012 (MCM)
- SPN 521013 (MCM)
- SPN 521014 (CPC3)
- SPN 521015 (CPC3)
- SPN 521018 (MCM)
- SPN 521019 (MCM)
- SPN 521020 (MCM)
- SPN 521027 (MCM)
- SPN 521039 (MCM)
- SPN 521049 (MCM)
- SPN 521050 (CPC3)
- SPN 521050 (MCM)
- SPN 521052 (MCM)
- SPN 521054 (CPC3)
- SPN 521058 (MCM)
- SPN 522204 (CPC3)
- SPN 523597 (CPC3)
- SPN 524200 (CPC3)
- SPN 524204 (CPC3)
- SPN 524205 (CPC3)
- SPN 524206 (CPC3)
- SPN 524207 (CPC3)
- SPN 524208 (CPC3)
- SPN 524213 (CPC3)
- SPN 524275 (CPC)
- SPN 524276 (CPC)
- SPN 524277 (CPC)
- SPN 524278 (CPC)
- SPN 524279 (CPC)
- SPN 524280 (CPC)
- SPN 524283 (CPC)
- SPN 524284 (CPC)
- SPN 524285 (CPC)
- SPN 524286 (CPC)
- SPN 524287 (CPC)
Verify Repairs

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Related manuals…

Detroit Engine Code Spn 4374 Fmi 0

Questions & Requests

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Under Pressurized Diesel Exhaust Fluid System

SPN 4374/FMI 0

Description This Code Sets When the Diesel Exhaust Fluid (DEF) Pump Speed is Higher than Normal For a Given DEF Pressure
Monitored Parameter DEF Pump Speed, DEF Pressure
Monitor Sequence None
Execution Frequency Continuous When Enabling Conditions Met
Typical Duration Continuous Until Resolved
Dash Lamps MIL, CEL
Engine Reaction Derate 25%
Verification SCR ADS Self-Check

Possible causes:
• Restriction in the DEF line between the DEF tank and the DEF pump
•Restriction in the DEF line between the DEF pump and the DEF dosing unit
• Air in the DEF line between the DEF tank and the DEF pump
• Restriction in the DEF pump
•Failed DEF pump

Check as follows:

Show/Hide Checkboxes

NOTICE:
Customers in colder climates where winter ambient air temperatures generally stay below -11° C (12°F) need to verify that the DEF is not frozen before troubleshooting this fault code.
1. Connect DiagnosticLink® .
2. Turn the ignition ON (key ON, engine OFF).
3. Check for multiple codes. Are codes SPN 4334/FMI 3, 4, SPN 4375/FMI 3, 4, or SPN 3361/FMI 3, 4, 5 also present?1. Yes; diagnose and repair the other fault codes first. Verify repair.
2. No; Go to step 4.

4. Turn the ignition OFF.
5. Inspect the DEF tank vent tube. Is there any blockage or restriction?1. Yes; clear the restricted vent tube. Go to step 6.
2. No; Go to step 6.

6. Using DEF test strip A0005850202, check for diesel fuel or oil contamination of the DEF fluid. Does the test strip indicate contamination?1. Yes; replace the following components and refill the system with new DEF:
◾ DEF tank
◾ DEF tank header
◾ DEF supply line from the DEF tank to the DEF pump
◾ DEF line from the DEF pump to the DEF dosing unit
◾ DEF return line from the DEF dosing unit to the DEF tank
◾ DEF pump
◾DEF dosing unit

2. No; Go to step 7.

To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure.
7. Inspect the DEF line that runs from the DEF pump to the DEF dosing unit. Is the DEF line damaged, pinched, or kinked?1. Yes; replace the DEF line from the DEF pump to the DEF dosing unit.
2. No; Go to step 8.

8. Inspect the DEF line that runs from the DEF tank to the DEF pump. Is the DEF line damaged, pinched, or kinked?1. Yes; replace the DEF line from the DEF tank to the DEF pump.
2. No; Go to step 9.

9. Disconnect the DEF supply line at the dosing unit. Fill the graduated cylinder supplied in DEF test kit (P/N: W060589001900) with water. Place the end of the DEF line into the graduated cylinder as far as possible.

NOTE: Place the graduated cylinder in a secondary container to catch over flowing DEF fluid, making sure you still have clear sight of the end of the DEF line.
10. Using DiagnosticLink, perform the Selective Catalyst Reduction Airless Dosing System (SCR ADS) Self-Check routine. When the service routine is running, visually inspect the DEF line for continuous air bubbles coming from the line and DEF flow.
11. Were any bubbles coming from the DEF pump supply line indicating a crack in the DEF pump feed line?1. Yes; replace the DEF supply line from the DEF tank to the DEF pump. Verify repair.
2. No; Go to step 12.

12. Remove the DEF tank header.
13. Inspect inside the DEF tank for debris that may be floating around or stuck to the DEF tank header pick up screen. Was any debris found?1. Yes; flush out the DEF tank and clean the DEF tank header filter screen. Go to step 14.
2. No; Go to step 14.

Spn Fmi Code List

NOTICE:
The RS SUPPLY KIT contains all the necessary parts for steps 14-17.14. Using the DEF/Doser Kit (RS SUPPLY KIT – available through eParts catalog), replace the DEF pump module filter. Refer to section “Installation of the GHG14 Diesel Exhaust Fluid Pump Filter” . Go to step 15.

15. Replace the DEF pump inlet screen. Refer to section “Installation of the Diesel Exhaust Fluid Pump Module Filter Screen” . Go to step 16.
16. Replace DEF Pressure Relief Valve (PRV). Refer to section “Removal of the Diesel Exhaust Fluid Pump Pressure Relief Valve” . Go to step 17.
17. Replace DEF dosing unit inlet screen. Refer to section “Removal of the GHG14 Diesel Exhaust Fluid Dosing Unit Inlet Screen” . Go to step 18.

NOTE: If air pressure is greater than 827 kPa (120 psi), use a pressure regulator.
18. Prime pump with shop air. Using a rubber tipped air gun to seal around the DEF pump inlet fitting, apply clean regulated shop air to the DEF pump inlet fitting for three to five seconds.
d140723a

19. Connect all DEF lines and electrical connections. Go to step 20.

NOTE: Performing the Selective Catalytic Reduction Airless Dosing System (SCR ADS) Self-Check Routine may fail the first couple of times until the system is fully primed.
20. Perform Selective Catalytic Reduction Airless Dosing System (SCR ADS) Self-Check Routine two times to further prime the system. Ignore the results of these two tests and Go to step 21.
21. Perform Selective Catalytic Reduction Airless Dosing System (SCR ADS) Self-Check Routine to check the operation of the system. Did the SCR ADS test pass?1. Yes; replacing the DEF Pressure Relief Valve (PRV) in the kit resolved the concern. No further diagnostics or repairs are needed.
2. No; replace the DEF pump.