M0069062-00

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Technical Information Bulletin
The Intake Throttle Valve Is Causing Regeneration Issues on Certain On-Highway Truck Engines
{1000, 1087, 7000}
Media Number -M0069062-00
Publication Date -2016/03/04
Date Updated -2016/03/07
Caterpillar: Confidential Yellow
i06605912
The Intake Throttle Valve Is Causing Regeneration Issues on Certain
On-Highway Truck Engines {1000, 1087, 7000}
SMCS - 1000; 1087; 7000
On Highway Truck
CT660S (S/N: TGA1-UP; TGD1-UP; TRK1-UP; TKL1-UP; TGR1-UP; TGS1-UP; TJS1-UP; TGT1UP; TGW1-UP; TSW1-UP; TSY1-UP; TGZ1-UP)
Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is
known, use the solution that is identified below.
Problem
Some intake throttle valves are causing frequent regeneration issues and can be hard to detect through normal test
procedures. Often there may not be any diagnostic troubleshooting codes, which may cause extended downtime for
diagnosing. Customers may experience frequent regenerations, low power, and unit unable to complete a
regeneration or soot load accumulation issues.
Possible Diagnostic Troubleshooting Codes and Dashboard Indicator Lights
The unit may have one or more or none of the following codes.
Table 1
Troubleshooting Codes/Dash Light
Description
SPN 51 FMI 7/MIL
ETP Does Not Agree with Commanded Position
SPN 3719 FMI 0/MIL
DPF Soot Load-Highest
SPN 3719 FMI 15/MIL
DPF Soot Load-Lowest
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SPN 3719 FMI 16/MIL
DPF Soot Load-Moderate
SPN 4766 FMI 10/MIL
DPF Regen Feedback Fault
Solution
Inspection Procedure
1. Inspect the ITV connector for any issues like backed out pins, corrosion, or looseness.
Diagnostic Procedure
1. Form a connection with Engine Diagnostics and run an OBFCT.
Illustration 1
g06043498
OBFCT with a Bad ETV
Item 1: Notice that the DOC inlet and outlet temperatures are cooler than normal regeneration should be. The DOC inlet should be
in the 288° C (550° F) to 371° (700° F) range. This is due to the ITV not working properly to produce enough heat in the exhaust
system.
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Item 2: Notice the length of time it takes for the temps to start rising.
Illustration 2
g06043512
Good Regeneration Chart
Item 1: Notice the temperatures rise much quicker than the bad regeneration shows.
Item 2: DOC inlet temperature is in a good range.
2. Review the OBFCT and compare to the graph as shown in Illustration 1. As stated in items 1 and 2 of
Illustration 1 look for a slow to build temp and a DOC inlet temperature that stays too cold. You generally
should see DOC IT around 288° C (550° F) to 371° (700° F) as shown in Illustration 2.
3. If your OBFCT looks similar to Illustration 1 and all aftertreatment components are testing good, then
replace the ETV and retest. If it does not exhibit a similar failure, refer to the UENR5801Aftertreatment
System Diagnostics and Service Manual for further diagnostics of any regeneration concerns.
Required Parts
Table 2
Qty
Part Number
Description
1
376-2757
Intake Throttle Valve (Vertical)
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1
376-2618
Intake Throttle Valve (Horizontal)
1
423-8712
Gasket
1
376-2498
Bolt M8 x 50
2
358-0203
Bolts M8 x 100
Repair Procedure
1. Replace the ITV and rerun the OBFCT to verify the repair.
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