309-15.pdf- SPN 3251/FMI 16 - EPA10 · 2018. 12. 16. · 2 SPN 3251/FMI 16 - EPA10 Diesel Particulate Filter Pressure Out of Range High Table 1. SPN 3251/FMI 16 Description This Fault - [PDF Document] (2024)

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SUBJECT DATE

SPN 3251 (ACM)(EPA10) March 2015

Additions, Revisions, or Updates

Publication Number / Title Platform Section Title Change

DDC-SVC-MAN-0084 DD PlatformSPN 3251/FMI 16 -

EPA10Updated diagnostic with new DOC cleaning option.

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All information subject to change without notice. 3309-15 Copyright © 2015 DETROIT DIESEL CORPORATION

2 SPN 3251/FMI 16 - EPA10

Diesel Particulate Filter Pressure Out of Range High

Table 1.SPN 3251/FMI 16

Description This Fault Code Sets when the Diesel OxidationsCatalyst (DOC)Inlet Pressure is 28 kPa (4.2 psi) Greater Than theDiesel ParticulateFilter (DPF) Outlet Pressure for More Than 10Seconds

Monitored Parameter DOC Inlet Pressure Sensor and DPF OutletPressure Sensor

Typical Enabling Conditions Always On

Monitor Sequence None

Execution Frequency Continuous When Enabling Conditions Met

Typical Duration 2 Seconds

Dash Lamps MIL, CEL, SEL

Engine Reaction Derate 25%

Verification Run Engine Between 1200 to 1800 rpm With a LoadLess Than 10%

Check as follows:1. Connect DiagnosticLink ®.2. Turn theignition ON (key ON, engine OFF).3. Check for other fault codes.Are fault codes SPN 3609/FMI 3 or FMI 4 present?

a. Yes; diagnose the other fault codes first.b. No; Go to step4.

4. Using DiagnosticLink, go to Service Routines > SCR and DPFvoltages.5. Monitor the DOC inlet pressure sensor voltage, pin 87.Is the voltage between 0.44 and 0.56 volts?

a. Yes; Go to step 6.b. No; replace the DOC inlet pressuresensor. Refer to section "Removal of the EPA10 Diesel OxidationCatalyst

Inlet Pressure Sensor". Verify repair.6. Monitor the DPF outletpressure sensor voltage, pin 72. Is the voltage between 0.44 and0.56 volts?

a. Yes; Go to step 7.b. No; replace the DPF outlet pressuresensor. Refer to section "Removal of the EPA10 Diesel ParticulateFilter

Outlet Pressure Sensor". Verify repair.7. Perform the Lowtemperature ATD routine. Refer to section "EPA10 PerformPerformance Check - Low Temperature

ATD".8. Monitor the DOC inlet temperature, DOC outlettemperature and the DPF outlet temperature readings. Does theDOC

outlet temperature sensor reading follow the DOC inlettemperature sensor reading?a. Yes; replace the DPF due to arestriction. Refer to section "Removal of the EPA10 DieselParticulate Filter".

Verify repair.b. No; Go to step 9.

WARNING: PERSONAL INJURY

To avoid injury before starting and running the engine, ensurethe vehicle is parked on a levelsurface, parking brake is set, andthe wheels are blocked.

WARNING: ENGINE EXHAUST

To avoid injury from inhaling engine exhaust, always operate theengine in a well-ventilated area.Engine exhaust is toxic.

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9. Start the engine and run a Parked Regen. Monitor DOC inletpressure and engine speed during the regen. Compareyour DOC inletpressure reading to the screen shots and descriptions below in (aand b) to determine what step to go tonext.

a. If the DOC inlet pressure starts out high above 10 kPa (1.45psi) and decreases during the parked regen, thisindicates the DPFswere plugged and the parked regen cleared them. Go to step 10.

b. If the DOC inlet pressure starts above 6 kPa (0.8psi), andstays high, the DOC is considered plugged. Go to step11.

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10. The parked regen has reduced the DOC inlet pressure byreducing the soot accumulated in the DPF. Verify the faultcode isgone and fill out the “ATD Checklist - EPA07/EPA10/GHG14”. Refer tosection "ATD Checklist - EPA07/EPA10/GHG14".

11. Using DiagnosticLink 8.0 SP1 or later, perform the DOC facecleaning routine. Refer to section "EPA10 and GHG14Diesel OxidationCatalyst Face Cleaning".

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