NHTSA ID Number: 10056592
Manufacturer Communication Number: SIB-SPN-4077
TSB/Document Date: 2015-01-10
Summary
DETROIT: WHEN THE HYDROCARBON (HC) DOSER FUEL LINE PRESSURE (FLP) SENSOR CIRCUIT FAILS HIGH, THE MOTOR CONTROL MODULE (MCM) DETECTS IT, A FAULT CODE WILL SET. *PE
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SB-10056592-2626
SUBJECT
DATE
SPN 4077 (MCM)(EPA07;EPA10;GHG14)
July 2014
Additions, Revisions, or Updates
Publication Number / Title
Platform
DDC-SVC-MAN-0084
DD Platform
Section Title
Change
SPN 4077/FMI 3 - EPA07 - EPA10 - GHG14
The diagnostic procedures have been
updated.
SPN 4077/FMI 4 - EPA07 - EPA10 - GHG14
All information subject to change without notice.
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2 SPN 4077/FMI 3 - EPA07 - EPA10 - GHG14
2
SPN 4077/FMI 3 - EPA07 - EPA10 - GHG14
Doser Fuel Line Pressure Sensor Circuit Failed High
Table 1.
SPN 4077/FMI 3
Description
This fault code sets when the Motor Control Module (MCM) detects
that the Hydrocarbon (HC) Doser Fuel Line Pressure (FLP) Sensor
Circuit is failed high.
Monitored Parameter
Hydrocarbon (HC) Doser Fuel Line Pressure Sensor
Typical Enabling Conditions
Always Enabled
Monitor Sequence
None
Execution Frequency
Always Enabled
Typical Duration
2 Seconds
Dash Lamps
MIL, CEL
Engine Reaction
None
Verification
Engine Idle (1 minute)
Check as follows:
1. Connect DiagnosticLink ®.
2. Turn the ignition ON (key ON, engine OFF).
3. Is the engine equipped with a DD15 AT engine?
a. Yes; Go to step 11.
b. No; Go to step 4.
4. Check for multiple fault codes. Is fault code SPN 3480/FMI 3 also present?
4
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 16-14
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a. Yes; repair the circuit between pin 104 of the 120-pin Motor Control Module (MCM) and pin 2 of the Fuel Doser
Line Pressure sensor electrical connector/pin 2 of the Fuel Compensation Pressure sensor. Verify repair.
b. No; Go to step 5.
5. Is fault code SPN 3510/FMI 3 also present?
a. Yes; diagnose SPN 3510/FMI 3 first; Refer to section "SPN 3510/FMI 3 - EPA07 - EPA10 - GHG14".
b. No; Go to step 6.
6. Turn the ignition OFF.
7. Disconnect the hydrocarbon doser fuel line pressure sensor (1).
8. Disconnect the 120-pin Motor Control Module (MCM) connector.
9. Measure the resistance from pin 111 of the 120-pin MCM connector harness side and pin 1 of the hydrocarbon doser
fuel line pressure sensor electrical connector harness side. Is the resistance less than 5 ohms?
a. Yes; Go to step 10.
b. No; repair the circuit between pin 111 of the 120-pin MCM connector and pin 1 of the hydrocarbon doser fuel
line pressure sensor electrical connector. Verify repair.
10. Measure the resistance from pin 104 of the 120-pin MCM connector harness side and pin 4 of the hydrocarbon doser
fuel line pressure sensor electrical connector harness side. Is the resistance less than 5 ohms?
a. Yes; replace the Motor Control Module (MCM), Refer to section "Removal of the Motor Control Module".
Verify repair.
b. No; repair the circuit between pin 2 of the hydrocarbon doser fuel line pressure sensor and the circuit splice.
Verify repair.
11. Check for multiple fault codes. Is fault code SPN 3480/FMI 3 also present?
a. Yes; repair the circuit between pin 104 of the 120-pin Motor Control Module (MCM) and pin 2 of the Fuel Line
Pressure sensor electrical connector/ pin 4 of the Fuel Compensation Pressure sensor electrical connector. Verify
repair.
b. No; Go to step 12.
12. Is fault code SPN 3510/FMI 3 also present?
a. Yes; diagnose fault code SPN 3510/FMI 3 first, Refer to section "SPN 3510/FMI 3 - EPA07 - EPA10 - GHG14".
b. No; Go to step 13.
13. Turn the ignition OFF. Go to step 14.
All information subject to change without notice.
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2 SPN 4077/FMI 3 - EPA07 - EPA10 - GHG14
14. Disconnect the hydrocarbon doser fuel line pressure sensor (1).
15. Disconnect the 120-pin Motor Control Module (MCM) connector.
16. Measure the resistance from pin 111 of the 120-pin MCM connector harness side and pin 4 of the hydrocarbon doser
fuel line pressure sensor electrical connector harness side. Is the resistance less than 5 ohms?
a. Yes; replace the MCM, Refer to section "Removal of the Motor Control Module". Verify repair.
b. No; repair the circuit between pin 111 of the 120-pin MCM connector and pin 4 of the hydrocarbon doser fuel
line pressure sensor electrical connector. Verify repair.
6
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 16-14
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SPN 4077/FMI 4 - EPA07 - EPA10 - GHG14
Doser Fuel Line Pressure Sensor Circuit Failed Low
Table 2.
SPN 4077/FMI 4
Description
This fault code sets when the Motor Control Module (MCM) detects
that the Hydrocarbon (HC) Doser Fuel Line Pressure (FLP) Sensor
Circuit is failed low.
Monitored Parameter
Hydrocarbon (HC) Doser Fuel Line Pressure Sensor
Typical Enabling Conditions
Always Enabled
Monitor Sequence
None
Execution Frequency
Always Enabled
Typical Duration
2 Seconds
Dash Lamps
MIL, CEL
Engine Reaction
None
Verification
Engine Idle (1 minute)
Check as follows:
1. Connect DiagnosticLink ®.
2. Turn the ignition ON (key ON, engine OFF).
3. Check for multiple fault codes. Is fault code SPN 3510/FMI 4 also present?
a. Yes; diagnose SPN 3510/FMI 4; Refer to section "SPN 3510/FMI 4 - EPA07 - EPA10 - GHG14".
b. No; Go to step 4.
4. Is this vehicle equipped with a DD15 AT engine?
All information subject to change without notice.
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3 SPN 4077/FMI 4 - EPA07 - EPA10 - GHG14
a. Yes; Go to step 6.
b. No; Go to step 5.
5. Disconnect the Hydrocarbon doser fuel line pressure sensor (1). Is fault code SPN 4077/FMI 4 still present?
a. Yes; repair the circuit between pin 111 of the 120-pin MCM connector and pin 1 of the hydrocarbon doser fuel
line pressure sensor connector. Verify repair.
b. No; replace the hydrocarbon doser block; Refer to section "Removal of the Hydrocarbon Doser Block ". Verify
repair.
6. Disconnect the Hydrocarbon doser fuel line pressure sensor (1). Is fault code SPN 4077/FMI 4 still present?
8
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 16-14
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a. Yes; repair the circuit between pin 111 of the 120-pin MCM connector and pin 4 of the hydrocarbon doser fuel
line pressure sensor electrical connector. Verify repair.
b. No; replace the hydrocarbon doser block; Refer to section "Removal of the Hydrocarbon Doser Block ". Verify
repair.
All information subject to change without notice.
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TSB/Document ID: SIB-SPN-4077
Replacement Service Bulletin Number:
MFR Communication Date: 2014-07-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
MFR Component System:
MFR Component Subsystem:
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