14TS18

No.: 14 TS-18
June 25, 2014
TO:
Service Locations
FROM:
Service Systems Development
SUBJECT:
GHG14 DD Engine EGR System Fault Codes
Note: This document supersedes 13 TS-30.
ISSUE
Errors in the EGR system may result in one or more of the following codes:
•
•
•
•
•
•
SPN 2791/FMI 2 - EGR Valve Actuator, Position Deviation Error
SPN 2791/FMI 11 - EGR Valve Actuator, Motor Off
SPN 2791/FMI 16- EGR Valve Actuator, Learn Cycle Too Large
SPN 520296/FMI 31 - EGR Valve Actuator Learn Cycle Incomplete
SPN 2659/FMI 0 - EGR Flow Target Error Diagnostic - High Flow
SPN 2659/FMI 1 - EGR Flow Target Error Diagnostic - Low Flow
CAUSE
Incorrect, missing, or loose parts in the EGR system can cause the above fault codes.
REQUIRED ACTION
Follow all published troubleshooting in Power Service Literature in the EPA07/10/GHG14 DDEC
VI/10/13 Electronics and Troubleshooting Manual (DDC-SVC-MAN-0084). Note that some EGR
system fault codes are covered in Advanced Diagnostics as shown in Technical Service letter
11 TS-3.
Detroit Diesel 13400 Outer Drive, West / Detroit, Michigan 48239-4001
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1. Carefully inspect the EGR valve system hardware consisting of the EGR valve actuator,
lever, pull rod, and EGR valve for incorrect, missing, damaged, or loose parts. The lever on top
of the EGR valve actuator is dependent on engine model and type. See Figures 1 and 2 for
information on how to correctly identify the lever. Note the numbers stamped on the lever.
Figure 1 – Location of Lever
471 used on DD13
472 used on DD15AT (model
472906)
Figure 2 – Identification of Lever
473 used on DD15TC
(472909) and DD16
2. Inspect the pull rod connecting the lever to the EGR valve. The hardware should be firmly
tightened with no slack, and there should be no binding in movement. The pull rod has a “v”
stamped on it at the EGR valve end, and an “s” stamped on it at the EGR valve actuator end.
The DD15AT (472906) has an additional spacer at the EGR valve end that must also be
correctly installed. The spacer is used on the connecting bolt between the top of the pull rod ball
socket and the bottom of the EGR valve circular lever. Omission of the spacer can result in
binding of the EGR valve during actuation. The EGR pull rod lever design is different on DD13,
DD15TC, and DD16 engines and a spacer is not used on those applications. See Figures 3-6
for examples of the various configurations.
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Figure 3 – DD13 System, Pull Rod P/N Located on Top (Former) or on Front Facing Away
from Engine (Current)
EGR Valve Circular Lever
Figure 4 – DD15AT (472906) System
Spacer Between Pull rod and Circular Lever
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Figure 5 – DD15AT (472906) System, Pull rod P/N Located on Top
Figure 6 – DD15TC (472909) and DD16 System, Pull rod P/N Located on Top
6/24/2014
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REQUIRED MATERIAL
If any parts need replacing, Table 1 provides a list of the correct part numbers for the major
components. Part numbers are subject to change without notice.
Engine Type
DD13 (Former)
DD13 (Current)
DD15AT (472906)
DD15TC (472909) and DD16
EGR Small Lever
Assembly
A4711400124
A4711400124
A4721400124
A4731400124
EGR Valve actuator
Pull rod
A4701500494
A4701500494
A4701500494
A4701500494
A4711401946
A4711403246
A4721400946
A4731400346
Table 1 – EGR System Major Components
REPAIR PROCEDURE
If any repairs are needed, repair information on the EGR system components can be found in
the EPA07/10/GHG14 Exhaust – EGR – ATS Manual (DDC-SVCMAN-0083).
Note that if the EGR valve actuator is being replaced, it must be fully installed onto the engine
with all necessary hardware attached before the ignition is turned on for the first time in the
valve actuator's life. This is because the valve actuator does a “slow learn” the first time it’s
powered up to correctly learn the end stops as it fully cycles. Subsequent ignition sequences
only have a “quick learn”. If the valve actuator is not correctly installed, the initial “slow learn” will
be incorrect. This can be corrected by running the “EGR Actuator Slow Learn” procedure in
DiagnosticLink®. Choose “EGR Actuator Slow Learn” from the Actions » EGR menu to display
the EGR Actuator Slow Learn dialog box.
CLAIM PROCESS
Normal in-warranty procedures apply. Proactive removal of properly functioning EGR
system parts is not allowed under warranty.
CONTACT INFORMATION
Please contact the Detroit™ Customer Support Center at 800-445-1980 or email
[email protected] if you have any questions.