-
1 07 06-16
SUBJECT DATE
SPN 4364 (ACM) (EPA10;GHG14) July 2016
Additions, Revisions, or Updates
Publication Number / Title Platform Section Title Change
DDC-SVC-MAN-0084 DD Platform
SPN 4364/FMI 18 -GHG14
Updated diagnostics with additional graphics.SPN 4364/FMI 18
-
EPA10
DiagnosticLink users: Please update the troubleshooting guides
in DiagnosticLink with this newest version. To update thetool
troubleshooting guide, open DiagnosticLink and from the Help
Troubleshooting Guides menu, select the appropriatetroubleshooting
manual, then click Update.
07 06-16
All information subject to change without notice. 307
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
2 SPN 4364/FMI 18 GHG14
SCR NOx Conversion Efficiency Low
Table 1.SPN 4364/FMI 18
Description This Code Sets When the Aftertreatment Control
Module (ACM)detects That the Selective Catalyst Reduction (SCR)
NOxConversion Efficiency is Low
Monitored Parameter SCR Inlet NOx Sensor and SCR Outlet NOx
Sensor
Typical Enabling Conditions Diesel Exhaust Fluid (DEF) Dosing
Enabled, 1000 to 2100 rpm, 15 to100% Load
Monitor Sequence None
Execution Frequency Continuous When Enabling Conditions Met
Typical Duration 30 Minutes
Dash Lamps MIL
Engine Reaction None
Verification Parked Regeneration
Possible causes:
Contaminated DEF Incorrect concentration of urea in the DEF
Biased NOx sensor Excessive DEF build-up inside the SCR mixing
chamber Overtemp aftertreatment Improper DPF maintenance Internal
structure failure of 1-Box
NOTICE: DEF crystallization inside the SCR mixing chamber or
around the dosing unit does not indicate a failed/leaking DEF
doser. Do not replace the DEF dosing unit unless directed.
Check as follows:
1. Connect DiagnosticLink .2. Turn the ignition ON (key ON,
engine OFF).3. Check for other fault codes. Are there any air
management system fault codes present, such as Intake Throttle
Valve
(ITV), Intake Manifold Pressure (IMP), Intake Air Temperature
(IAT), or turbocharger?a. Yes; diagnose the air management system
fault codes first.b. No; Go to step 4.
4. Are there any Exhaust Gas Recirculation (EGR) system fault
codes present?a. Yes; repair the EGR system fault codes first.b.
No; Go to step 5.
5. Are there any fuel system fault codes present?a. Yes;
diagnose the fuel system fault codes first.b. No; Go to step 6.
6. Are there any other NOx sensor fault codes present?a. Yes;
diagnose the other NOx sensor fault codes first.b. No; Go to step
7.
7. Was another emission component-related fault code repaired
prior to this step?
2 SPN 4364/FMI 18 GHG14
4 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
a. Yes; perform a parked regeneration to verify repairs and
clear fault codes.b. No; Go to step 8.
8. Are there any ACM temperature or pressure fault codes
present?a. Yes; diagnose those faults first.b. No; Go to step
9.
9. Turn the ignition OFF.10. Use DEF test strip A0005850202 to
check for diesel fuel or oil contamination of the DEF fluid; Refer
to section
"Checking Diesel Exhaust Fluid Quality". Do the test strips or
visual inspection indicate that the DEF is contaminated?a. Yes; for
diesel fuel or oil contamination, refer to 13 TS-17
(http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/
13TS17.pdf) and refer to appropriate Original Equipment
Manufacturer (OEM) literature for DEF tank cleaning/flushing
procedures. Refill the DEF tank with new DEF. Verify repair.
b. No; Go to step 11.11. Using the refractometer from DEF Test
Kit W060589001900, measure the DEF urea percentage. Refer to
section
"Flushing of the Diesel Exhaust Fluid System". Is DEF urea
percentage between 31 and 34 percent?a. Yes; Go to step 12.b. No;
clean/flush the DEF tank and the DEF system. Refer to section
"Flushing of the Diesel Exhaust Fluid
System". Refill the DEF tank with new DEF. Verify repair.12.
Turn the ignition ON (key ON, engine OFF).13. Inspect the area
around the DEF dosing unit gasket for DEF crystallization. Is there
any DEF crystallization build-up
present?a. Yes; this indicates the gasket has failed, NOT the
DEF dosing unit. Replace the gasket after completing the DEF
quantity test in the next step. Go to step 14.b. No; Go to step
14.
14. Unbolt the DEF doser from the aftertreatment; do not
disconnect the DEF lines or electrical connector.
07 06-16
All information subject to change without notice. 507
06-16Copyright 2016 DETROIT DIESEL CORPORATION
http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdfhttp://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdfhttp://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdf
-
Figure 1. Normal DEF Crystallization In The DEF Doser Port
Hole15. Use the graduated cylinder provided in DEF test kit
W060589001900 and perform a DEF quantity test service routine;
Refer to section "Diesel Exhaust Fluid Quantity Test -
GHG14".16. Monitor the amount of DEF dispensed into the DEF-safe
container. Is the amount of DEF dispensed between 108 to
132 mL (3.7 to 4.5 oz.)?a. Yes; Go to step 17.b. No; replace the
DEF dosing unit, using a new gasket and bolts, as these parts are
one-time-use components. Refer
to section "Removal of the GHG14 Dosing System Doser". Verify
repair.17. DEF crystallization buildup inside the SCR mixing
chamber will cause poor NOx conversion efficiency. Use a scope
to
see inside the DEF port for excessive DEF accumulation within
the mixing chamber. Below are examples of normaland excessive
amounts of DEF in the mixing chamber. Is there an excessive amount
of DEF present in the mixingchamber?
a. Yes; Go to step 22.b. No; reinstall the DEF dosing unit,
using a new gasket and bolts, as these parts are one-time-use
components.
Refer to section "Installation of the GHG14 Dosing System Doser.
Go to step 18.Below are examples of normal DEF crystallization
inside the SCR mixing chamber.
2 SPN 4364/FMI 18 GHG14
6 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
1. Looking inside SCR Mixing Chamber withDPF removed. Note:
Doser Port Location
07 06-16
All information subject to change without notice. 707
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
1. Doser Port
Below are examples of excess DEF crystallization inside the SCR
mixing chamber.
Table 2.
NOTICE: This can be seen by looking inside the mixing chamber
through the DEF doser mounting port.
2 SPN 4364/FMI 18 GHG14
8 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
07 06-16
All information subject to change without notice. 907
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
1. Doser Port, restricted by solid mass ofcrystalized DEF.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
18. Start and run a complete Parked Regeneration. Chart the
following sensors; Inlet NOx Sensor, Outlet NOx Sensor andNOx
Conversion Efficiency.
19. Review the whole parked regen from start to finish. Compare
the regen data results to the graphic below. Go to step20.
2 SPN 4364/FMI 18 GHG14
10 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
20. Above is an example of DEF accumulation inside the SCR
mixing chamber. This failure is identified by a small spikein the
outlet NOx reading. As the regeneration progresses and the excess
amount of DEF burns off inside the SCRmixing chamber, the NOx
conversion improves. Do the results from the parked regen look
similar to the graphicabove?
a. Yes; Go to step 22.b. No; Go to step 21.
07 06-16
All information subject to change without notice. 1107
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
21. Above is also an example of DEF accumulation inside the SCR
mixing chamber. Once again, there is a spike in theoutlet NOx
reading and NOx conversion efficiency drops. The only difference:
there was good NOx conversion untilthe high temperature inside the
aftertreatment started to burn off the built-up DEF, causing the
sudden drop in NOxconversion efficiency. Do the results from the
parked regen look similar to the graphic above?
a. Yes; Go to step 22.b. No; Go to step 23.
22. Vehicles with high load duty cycles are more prone to DEF
buildup inside the SCR mixing chamber. Install a DEFawning to help
eliminate this failure. Refer to section "GHG14 1-BOX Diesel
Exhaust Fluid (DEF) Awning".Verify repair.
23. Disconnect the DEF dosing unit electrical connector.
NOTE: Running the engine with DEF doser unit electronically
disconnected will induce a DEF doser circuit faultcode. This code
can be erased using DiagnosticLink once the DEF doser electrical
connector is reconnected.
24. Run the "GHG14 Perform Performance Check - Low Temp ATD".
Let the routine run for 20 minutes. Refer to section"GHG14 Perform
Performance Check - Low Temperature ATD". Are the NOx sensor
readings within 50 Parts PerMillion (PPM) of each other?
a. Yes; Go to step 26.b. No; replace the outlet NOx sensor.
Refer to section "Removal of the GHG14 Selective Catalyst
Reduction
Outlet Temperature Sensor". Go to step 25.25. Run the "GHG14
Perform Performance Check - Low Temperature ATD". Refer to section
"GHG14 Perform
Performance Check - Low Temperature ATD". Are the inlet and
outlet NOx sensor readings within 50 Parts PerMillion (PPM) of each
other?
a. Yes; Go to step 26.b. No; replace the inlet NOx sensor. Refer
to section "Removal of the GHG14 Selective Catalytic Reduction
Inlet
NOx Sensor". Go to step 26.26. Reconnect the DEF dosing unit
electrical connector.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
27. Start the engine and perform a parked regeneration and
monitor the NOx efficiency. Is the NOx efficiency above85%?
a. Yes; diagnostics are completed. Release the vehicle.b. No; Go
to step 28.
28. Review the last seven minutes of the parked regeneration log
data. The illustration below identifies the last sevenminutes of
the parked regen.
2 SPN 4364/FMI 18 GHG14
12 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
29. Is the Selective Catalyst Reduction (SCR) inlet temperature
lower than SCR outlet temperature by more than 38C(68.4F)?Example:
SCR Outlet temp 1090F minus SCR Inlet Temp 749F = 241F. The
difference between inlet and outlettemperature is 241F, which is
greater than 68.4F.
a. Yes; Go to step 30.
07 06-16
All information subject to change without notice. 1307
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
b. No; for a 1-Box system, replace the DOC/SCR module. For a
Two-Box system, replace the SCR module.Complete the ATD checklist
to identify cause of failure. Refer to section "ATD Checklist -
GHG14".
30. Review the data from the low temperature Aftertreatment
Device (ATD) check in step 24 to check for a driftedtemperature
sensor.
31. Are the SCR inlet and SCR outlet temperatures within 25C
(45F) after the 20 minutes?a. Yes; for a 1-Box, replace the DOC/SCR
module. This indicates internal structural damage; see image
below.
The ATD checklist is NOT required since the ATD is the primary
failed part.
b. No; replace the drifted SCR temperature sensor and verify
repair.
2 SPN 4364/FMI 18 GHG14
14 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
-
3 SPN 4364/FMI 18 - EPA10
Selective Catalyst Reduction NOx Conversion Low
Table 3.SPN 4364/FMI 18
Description This Fault Code Sets When the Aftertreatment Control
Module(ACM) Detects that the NOx Conversion is Lower than a
CalibratedThreshold
Monitored Parameter Selective Catalyst Reduction (SCR) Inlet NOx
Sensor, SCR OutletNOx Sensor
Typical Enabling Conditions Diesel Exhaust Fluid (DEF) Dosing
Enabled, 1000 to 1500 rpm, 15 to100% load, SCR Inlet Temperature
Sensor less than 650C(1200F), Ambient Temperature Greater Than 0C
(32F), CoolantTemperature Greater Than 70C (158F),
Non-regenerationConditions Present
Monitor Sequence None
Execution Frequency Continuous When Enabling Conditions Met
Typical Duration 30 Minutes
Dash Lamps MIL
Engine Reaction Derate 25%
Verification Parked Regeneration
Check as follows:
1. Connect DiagnosticLink .2. Turn the ignition ON (key ON,
engine OFF).3. Was another emission component-related fault code
repaired prior to this step?
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
a. Yes; perform a parked regeneration and recheck for the fault
code. If the fault code returns, Go to step 4.b. No; Go to step
4.
4. Check for other fault codes. Are there any air management
system fault codes present for the Intake Throttle Valve(ITV),
Intake Manifold Pressure (IMP), Intake Air Temperature (IAT),
turbocharger, etc.?
a. Yes; diagnose the other fault codes first.b. No; Go to step
5.
5. Are there any Exhaust Gas Recirculation (EGR) system fault
codes present?
07 06-16
All information subject to change without notice. 1507
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
a. Yes; diagnose the other fault codes first.b. No; Go to step
6.
6. Are there any other NOx sensor fault codes present?a. Yes;
diagnose the other fault codes first.b. No; Go to step 7.
7. Are there any fault codes for the DEF metering unit, DEF
pump, or DEF air valve present?a. Yes; diagnose the other fault
codes first.b. No; Go to step 8.
8. Are there any ACM temperature or pressure fault codes
present?a. Yes; diagnose those fault codes first.b. No; Go to step
9.
9. Turn the ignition OFF.10. Use DEF test strip A0005850202 to
check for diesel fuel or oil contamination of the DEF fluid. Refer
to section
"Checking Diesel Exhaust Fluid Quality". Do the test strips or
visual inspection indicate that the DEF is contaminated?a. Yes; for
diesel fuel or oil contamination, refer to 13 TS-17
(http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/
13TS17.pdf) and refer to appropriate Original Equipment
Manufacturer (OEM) literature for DEF tank cleaning/flushing
procedures. Refill the DEF tank with new DEF. Verify repair.
b. No; Go to step 11.11. Using a refractometer from the DEF Test
Kit W060589001900, measure the DEF percentage. Refer to section
"Checking Diesel Exhaust Fluid Quality". Is DEF percentage
between 28% and 36%?a. Yes; Go to step 12.b. No; flush the DEF
system. Refer to section "Flushing of the Diesel Exhaust Fluid
System". Verify repair.
12. Turn the ignition ON (key ON, engine OFF).13. Compare the
DEF pressure sensor reading to the barometric pressure sensor
reading. Are the readings within 4.3 psi of
each other?a. Yes; Go to step 14.b. No; replace the DEF pressure
sensor. Refer to section "Removal of the Diesel Exhaust Fluid
Pressure Sensor".
Verify repair.14. Perform the DEF quantity service routine.
Refer to section "Diesel Exhaust Fluid Quantity Test - EPA10". Go
to step
15.15. Monitor the amount of DEF dispensed into the DEF-safe
container included in DEF test kit W060589001900. Is the
amount of DEF dispensed between 102 and 138 mL?a. Yes; Go to
step 16.b. No; flush the DEF metering unit. Verify repair.
NOTE: SPN 3361/FMI 5 will set when the DEF dosing valve
electrical connector is disconnected. The fault codecan be cleared
using DiagnosticLink after the DEF dosing valve electrical
connector is reconnected.
16. Disconnect the DEF dosing valve electrical connector.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
3 SPN 4364/FMI 18 - EPA10
16 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdfhttp://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdfhttp://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/13TS17.pdf
-
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
17. Start the engine.18. Run the EPA10 Perform Performance Check
- Low Temperature ATD procedure to check the NOx sensors. Refer
to
section "EPA10 Perform Performance Check - Low Temperature ATD".
Are the inlet NOx sensor and the outlet NOxsensor readings within
50 Parts Per Million (PPM) of each other?
a. Yes; Go to step 20.b. No; replace the outlet NOx sensor. Go
to step 19.
19. Run the EPA10 Perform Performance Check - Low Temperature
ATD procedure to validate the NOx sensors arereading correctly.
Refer to section "EPA10 Perform Performance Check - Low Temperature
ATD". Are the inlet NOxsensor and outlet NOx sensor readings within
50 Parts Per Million (PPM) of each other?
a. Yes; Go to step 20.b. No; replace the inlet NOx sensor. Go to
step 20.
20. Reconnect the DEF dosing valve electrical connector.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a levelsurface, parking brake is set, and
the wheels are blocked.
21. Start the engine and perform a parked regeneration while
monitoring the NOx efficiency. Is the NOx efficiency above70%?
a. Yes; clear codes and release the vehicle.b. No; Go to step
22.
22. Review the last seven minutes of the parked regeneration log
data; the illustration below identifies the last sevenminutes of
the parked regen. Is the Selective Catalyst Reduction (SCR) inlet
temperature lower than SCR outlettemperature by more than 38C
(68.4F)?
a. Yes; Go to step 23.b. No, replace the ATD. For a 1-Box
system, replace the DOC/SCR module. For a Two-Box system, replace
the
SCR module. Complete the ATD checklist to identify cause of
failure. Refer to section "ATD Checklist -EPA07/EPA10".
07 06-16
All information subject to change without notice. 1707
06-16Copyright 2016 DETROIT DIESEL CORPORATION
-
23. Perform a low temperature Aftertreatment Device (ATD) check
using DiagnosticLink to check for a driftedtemperature sensor.
Refer to section "EPA10 Perform Performance Check - Low Temperature
ATD". Are the SCRinlet and SCR outlet temperatures within 25C (45F)
during the last five minutes of this test?
a. Yes; for a 1-Box system, replace the DOC/SCR module. This
indicates internal structural damage, see imagebelow. The ATD
checklist is NOT required since the ATD is the primary failed
part.
b. No; replace the drifted SCR temperature sensor and verify
repair.
3 SPN 4364/FMI 18 - EPA10
18 All information subject to change without notice.Copyright
2016 DETROIT DIESEL CORPORATION07 06-16
1 07 06-162 SPN 4364/FMI 18 GHG143 SPN 4364/FMI 18 - EPA10