0127-17

01 27-17
1
01 27-17
SUBJECT
DATE
SPN 1077 / FMI 14 (GHG14) (GHG17) (MCM)
January 2017
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
DDC-SVC-MAN-0084
DD Platform
- Heavy
Duty
SPN 1077/FMI 14 GHG14
DDC-SVC-MAN-0191
DD Platform
- Heavy
Duty
SPN 1077/FMI 14 GHG17
Change
Update for new routine available.
DiagnosticLink users: Please update the troubleshooting guides in DiagnosticLink with this newest version. To update the
tool troubleshooting guide, open DiagnosticLink and from the Help – Troubleshooting Guides menu, select the appropriate
troubleshooting manual, then click Update.
All information subject to change without notice.
01 27-17
Copyright © 2017 DETROIT DIESEL CORPORATION
3
2 SPN 1077/FMI 14 - GHG14
2
SPN 1077/FMI 14 - GHG14
Internal or External Leakage of the High Pressure Fuel System (Too High, Leak Down Test)
The Motor Control Module (MCM) monitors rail pressure during engine shut down and compares it to a stored learned value.
If the bleed-down rate has changed due to leakage and it is below the learned value, this code will set.
Table 1.
SPN 1077/FMI 14
Description
Leakage in High Pressure Fuel System Too High (Leak Down Test)
Monitored Parameter
Fuel Rail Pressure
Typical Enabling Conditions
Key OFF
Monitor Sequence
None
Execution Frequency
Once When Enabling Conditions Met
Typical Duration
30 Seconds
Dash Lamps
MIL, CEL
Engine Reaction
Verification
Fuel Injection System (FIS) Leak Detection (GHG14)
Check as follows:
1. Check for multiple codes. Are additional fault codes present with SPN 1077/FMI 14?
a. Yes; service the additional fault codes first.
b. No; only SPN 1077/FMI 14 is present. Go to step 2.
2. Is the Motor Control Module (MCM) at or above the software level and fuel map ZGS specified in the chart shown
below based on horsepower rating?
Table 2.
Model
HP Rating
Software Version
MCM Fuel Map
DD13
450 HP @ 1450/1650 lb·ft
4.7.0.0
ZGS 004
DD15 AT
455 HP @ 1550/1750 lb·ft
4.7.0.0
ZGS 004
DD15 AT
400 HP @ 1750 lb·ft
4.7.0.0
ZGS 004
4.7.0.0
ZGS 003
All Other Models and Ratings
a. Yes; Go to step 4.
b. No; Go to step 3.
3. Using DiagnosticLink, go to the fault code in the Fault Codes panel. Under section "Extended Data Record #6 DPF
Data," check ‘rpg_leak_div_int’. Is ‘rpg_leak_div_int’ greater than 2.25?
a. Yes; update MCM software and fuel map to level specified in step 2 and Go to step 4.
b. No; update MCM software and fuel map to level specified in step 2 and release vehicle.
WARNING: PERSONAL INJURY
Diesel engine exhaust and some of its constituents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
• Always start and operate an engine in a well ventilated area.
• If operating an engine in an enclosed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system or emission control system.
4
All information subject to change without notice.
Copyright © 2017 DETROIT DIESEL CORPORATION 01 27-17
01 27-17
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
4. Start and run the engine until fuel temperature is greater than 35°C (95°F) and coolant temperature is greater than
70°C (158°F).
5. Shut the engine down.
NOTICE: The high pressure fuel rail feed lines, vibration dampers, P-clips, mounting bracket and hardware are
one-time-use components and MUST be replaced any time they are removed. Refer to TS letter 16 TS-9Rev2
(http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/16TS9Rev2.pdf)16 TS-9Rev2 for the high pressure fuel line
kit numbers.
6. Check for an external high pressure fuel system leak(s). Are any leaks present at the following components?
• High Pressure Fuel Pump
• High Pressure Fuel Rail Feed Lines
• High Pressure Fuel Rail
• High Pressure Fuel Injector Lines
• Fuel Rail Pressure Sensor
• Pressure Limiting Valve
a. Yes; repair leaks. Verify repairs.
b. No; Go to step 7.
7. Check the engine oil dipstick. Is there any fuel in the oil?
a. Yes; Refer to section "Fuel in Oil".
b. No; Go to step 8.
8. Check for leakage from the Pressure Limiting Valve (PLV). Refer to section "Pressure Limiting Valve Flow Test –
Two-Filter Fuel System ". Does the PLV flow test pass?
a. Yes; Go to step 9.
b. No; replace the PLV and verify repairs.
For Two-Filter systems, Refer to section "Removal of the Pressure Limiting Valve - Two-Filter System".
NOTE: The ignition has to be off for five minutes between High Pressure Leak Detection routines.
NOTE: DiagnosticLink ® 8.05 or higher is necessary to complete this troubleshooting.
9. One cylinder at a time, remove the injector fuel transfer tube and cap the rail at each injector using J-48704. Run High
Pressure Leak Detection. Repeat for each injector. Record results.
Table 3.
HP Leak Detection Test Results
#1 Cap
#2 Cap
#3 Cap
#4 Cap
#5 Cap
#6 Cap
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
10. With any one injector capped off, does Leak Detection pass?
a. Yes; replace the injector that passes Leak Detection when capped. Refer to section "Removal of the Fuel
Injector - Two-Filter System" and then run the HP Leak Detection Test again to verify repair.
All information subject to change without notice.
01 27-17
Copyright © 2017 DETROIT DIESEL CORPORATION
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2 SPN 1077/FMI 14 - GHG14
b. No; Go to step 11.
11. Install all six rail caps. Crank engine for 10 seconds and then monitor rail pressure bleed down. Does rail pressure
bleed down under 100 bar in less than five minutes?
a. Yes; replace the high pressure fuel pump. Refer to section "Removal of the High Pressure Fuel Pump – TwoFilter System".
b. No; replace all six fuel injectors. Refer to section "Removal of the Fuel Injector - Two-Filter System" and then
run the HP Leak Detection Test again to verify repairs.
6
All information subject to change without notice.
Copyright © 2017 DETROIT DIESEL CORPORATION 01 27-17
01 27-17
3
SPN 1077/FMI 14 - GHG17
Internal or External Leakage of the High Pressure Fuel System (Too High, Leak Down Test)
The Motor Control Module (MCM) monitors rail pressure during engine shut down and compares it to a stored learned value.
If the bleed-down rate has changed due to leakage and it is below the learned value, this code will set.
Table 4.
SPN 1077/FMI 14
Description
Leakage in High Pressure Fuel System Too High (Leak Down Test)
Monitored Parameter
Fuel Rail Pressure
Typical Enabling Conditions
Key OFF
Monitor Sequence
None
Execution Frequency
Once When Enabling Conditions Met
Typical Duration
30 Seconds
Dash Lamps
MIL, CEL
Engine Reaction
Verification
Fuel System Integrity Check (FSIC)
Check as follows:
1. Check for multiple codes. Are there any additional SPN 1077 codes present?
a. Yes; service the additional fault codes first.
b. No; Go to step 2.
2. Is the Motor Control Module (MCM) at or above software level 6.4.0.5 and fuel map ZGS 007?
a. Yes; Go to step 4.
b. No; Go to step 3.
3. Using DiagnosticLink ®, go to the fault code in the Fault Codes panel. Under section "Extended Data Record #6 DPF
Data," check ’rpg_leak_div_int’. Is ‘rpg_leak_div_int’ greater than 2.25?
a. Yes; update MCM software to latest software level and Go to step 4.
b. No; update MCM software to latest software level and release vehicle.
WARNING: PERSONAL INJURY
Diesel engine exhaust and some of its constituents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
• Always start and operate an engine in a well ventilated area.
• If operating an engine in an enclosed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system or emission control system.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
All information subject to change without notice.
01 27-17
Copyright © 2017 DETROIT DIESEL CORPORATION
7
3 SPN 1077/FMI 14 - GHG17
4. Start and run the engine until fuel temperature is greater than 35°C (95°F) and coolant temperature is greater than
70°C (158°F).
5. Shut the engine down.
NOTICE: The high pressure fuel rail feed lines, vibration dampers, P-clips, mounting bracket and hardware are
one-time-use components and MUST be replaced any time they are removed. Refer to TS letter 16 TS-9Rev2
(http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/16TS9Rev2.pdf) for the high pressure fuel line kit numbers.
6. Check for an external high pressure fuel system leak(s). Are any leaks present at the following components?
• High Pressure Fuel Pump
• High Pressure Fuel Rail Feed Lines
• High Pressure Fuel Rail
• High Pressure Fuel Injector Lines
• Fuel Rail Pressure Sensor
• Pressure Limiting Valve
a. Yes; repair leaks. Verify repairs.
b. No; Go to step 7.
7. Check the engine oil dipstick. Is there any fuel in the oil?
a. Yes; Refer to section "Fuel in Oil".
b. No; Go to step 8.
8. Check for leakage from the Pressure Limiting Valve (PLV). Refer to section "Pressure Limiting Valve Flow Test –
Two-Filter Fuel System". Does the PLV flow test pass?
a. Yes; Go to step 9.
b. No; replace the PLV and verify repairs. Refer to section "Removal of the Pressure Limiting Valve - Two-Filter
System".
NOTE: The ignition has to be off for five minutes between High Pressure Leak Detection routines.
NOTE: DiagnosticLink ® 8.05 or higher is necessary to complete this troubleshooting.
9. One cylinder at a time, remove the injector fuel transfer tube and cap the rail at each injector using J-48704. Run High
Pressure Leak Detection. Repeat for each injector. Record results.
Table 5.
HP Leak Detection Test Results
#1 Cap
#2 Cap
#3 Cap
#4 Cap
#5 Cap
#6 Cap
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
Pass / Fail
10. With any one injector capped off, does Leak Detection pass?
a. Yes; replace that injector that passes Leak Detection when capped. Refer to section "Removal of the Fuel
Injector - Two-Filter System" and then run the HP Leak Detection Test again to verify repair.
b. No; Go to step 11.
11. Install all six rail caps. Crank engine for 10 seconds and then monitor rail pressure bleed down. Does rail pressure
bleed down under 100 bar in less than five minutes?
a. Yes; replace the high pressure fuel pump. Refer to section "Removal of the High Pressure Fuel Pump - TwoFilter System".
b. No; replace all six injectors. Refer to section "Removal of the Fuel Injector - Two-Filter System" and then run
the HP Leak Detection Test again to verify repair.
8
All information subject to change without notice.
Copyright © 2017 DETROIT DIESEL CORPORATION 01 27-17