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SUBJECT
DATE
SPN 3556 (ACM) (EPA10)
July 2014
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
Change
DDC-SVC-MAN-0084
DD Platform
SPN 3556/FMI 1 - EPA10
The diagnostics have been updated to include DOC face
plugging as a possible cause.
All information subject to change without notice.
7 03-14
Copyright © 2014 DETROIT DIESEL CORPORATION
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2 SPN 3556/FMI 1 - EPA10
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SPN 3556/FMI 1 - EPA10
Regeneration Temperature - Out Of Range Low - EPA10
Table 1.
SPN 3556 /FMI 1
Description
This code sets when the Diesel Oxidations Catalyst (DOC) outlet
temperature does not increase above the modeled threshold when
regeneration is enabled.
Monitored Parameter
DOC outlet temperature sensor
Typical Enabling Conditions
Regeneration enabled, 1100 to 2050 rpm, 50% to 100% engine load.
Monitor Sequence
None
Execution Frequency
Continuous When Enabling Conditions Met
Typical Duration
20 seconds
Dash Lamps
MIL, CEL
Engine Reaction
None
Verification
Parked Regeneration
Check as follows:
1. Connect DiagnosticLink ®.
2. Turn the key ON (Key ON, Engine OFF).
3. Check for multiple codes. Are there DOC outlet temperature sensor drift fault codes, DOC outlet temperature sensor
stuck fault codes, or DOC outlet temperature sensor circuit fault codes present?
a. Yes; diagnose the other fault codes first. Verify repair.
b. No; Go to step 4.
4. Are there any HC doser low pressure fault codes present?
a. Yes; diagnose the other fault codes first.
b. No; Go to step 5.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
WARNING: PERSONAL INJURY
To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing
any component.
5. Start the engine.
6. Perform a low temp Aftertreatment Device (ATD) regeneration; Refer to section "EPA10 Perform Performance Check
- Low Temperature ATD". Go to step 7.
7. After the low temp ATD regeneration has run for 20 minutes, monitor the DOC outlet temperature sensor reading. Is
the DOC outlet temperature sensor reading within 25°C (45°F) of the other exhaust temperature sensor readings?
a. Yes; Go to step 8.
b. No; replace the DOC outlet temperature sensor. Refer to section "Removal of the EPA10 Diesel Oxidation
Catalyst Outlet Temperature Sensor". Verify repair.
8. Visually inspect the exhaust system for leaks. Are there exhaust leaks present?
a. Yes; repair the exhaust leaks. Verify repair.
b. No; Go to step 9.
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All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 03-14
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9. Perform a parked regeneration. Go to step 10.
10. Review the log file and monitor the DOC inlet pressure sensor reading. Does the DOC inlet pressure sensor reading
start off high and stay high (1.5 or greater for a one box and 1.8 or greater for a 2 box)?
a. Yes; the constant high pressure indicates that the DOC is plugged. Go to step 11.
b. No; replace the HC doser block. Refer to section "Removal of the Hydrocarbon Doser Block ". Verify repair.
11. Check the Aftertreatment Control Module (ACM) software level. Is the ACM software level at least 8.7.0.105?
a. Yes; Go to step 12.
b. No; update the ACM software. Go to step 12.
12. Use DiagnosticLink and perform the DOC Face Plug Cleaning routine.
All information subject to change without notice.
7 03-14
Copyright © 2014 DETROIT DIESEL CORPORATION
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