IK1200812 ­ Diagnosing Cylinder Missfires Using the CPA Tool (I6 Engine)

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Title : Diagnosing Cylinder Missfires Using the CPA Tool (I6 Engine)
Applies To : 2007 Emissions MaxxForce® DT, 9 & 10, 2004 Emissions DT466, DT570 & HT570

CHANGE LOG
Dealers: Please refer to the change log text box below for recent changes to this article:
04/25/2017- Updated diagnostic software to Navistar Engine Diagnostics™.
12/05/2015- Refer reader to a different article for MaxxForce 7 misfire diagnostics and link to CPA RCT test
11/12/2015­ Removed 2010, OBD, and N9 & N10 because information is now in Diagnostic Manual
07/30/2015- Updated CPA Tool part numbers
03/30/2015- Removed 2010 fault list and referred readers to IK1201269
03/24/2015­ Revised warning statement
01/13/2015 - Link updated to WPL 14-018G
8/26/2014 - Replacement Part Numbers were added

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

Description:
This article describes the CPA Tool and the procedure for diagnosing misfire related symptoms on the I6 engine using the CPA Tool.

The CPA Tool is a specialized tool that is capable of detecting cylinder performance concerns during hot idle, cold idle, and a road test. The
CPA tool helps troubleshoot cylinder performance concerns, including intermittent issues.
*A new CPA Relative Compression Test (RCT) is now available (December 2015). See IKXXXX for information
The tool can also be used to analyze and interpret other engine sensor signal and actuator data with the assistance of Navistar Technical Services.

If the CPA Tool does not identify a weak cylinder (and the symptoms persist) then verify that there are no issues with the UVC connectors and proceed to the CPA
HPOP test (no injector faults) or IK1201269 (if injector faults exist)
CPA Related Links
•
•
•
•

CPA Tool Instructions (here)
CPA Software installation (upgrade) IK2700062

WPL14-018G - Warranty iApproval Requirements
WIL2800061 CPA WAC explanation
◦ Note: Road test is now an add­on as it is not needed if misfire is noticeable at idle or at no load.
• A CPA training course is offered on the LMS
Vehicle Symptoms:
• Engine Misfire
• Rough Running
Replacement Part Numbers:
Cylinder Performance Analyzer (CPA) entire kit - 12-999-01
Camshaft Position (CMP) Sensor Tee Harness (yellow) - 12-999-01-02
Crankshaft Position Sensor Tee Harness (black) ­ 12­999­01­03

Check for Diagnostic Trouble Codes (DTC):
• Are there any active or inactive DTCs related to the Code Groups identified below?

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IK1200812 ­ Diagnosing Cylinder Missfires Using the CPA Tool (I6 Engine)

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1. Code Group 1
- If there are active or inactive codes from Code Group 1 then perform CPA Test

2. Code Group 2
­If there are active or inactive codes from Code Group 2 then perform Condensed Performance Diagnostics
3. Misfire or rough running but no DTCs- perform Condensed Performance Diagnostics

• Any active DTCs not listed in Code Group 1 or 2 should be diagnosed per applicable Engine Diagnostic Manual:
CODE GROUP 1
(EPA 2007) MaxxForce DT, 9, 10:
• 8001-6, 8002-6, 8003-6, 8004-6, 8005-6, 8003-6-Injector Closed Coil-Open Circuit
• 8001­5, 8002­5, 8003­5, 8004­5, 8005­5, 8003­5­Injector Open Coil­Open Circuit
• 8001-4, 8002-4, 8003-4, 8004-4, 8005-4, 8003-4-Injector Open Coil-Short Circuit
• 8001-3, 8002-3, 8003-3, 8004-3, 8005-3, 8003-3-Injector Close Coil-Short Circuit
• 8151­5­Bank A Injector Open Coil Short
• 8151­6­Bank A Injector Close Coil Short
• 8152­5­Bank B injector Open Coil Short
• 8152­6­Bank B­Injector Close Coil Short
(EPA 2004) DT466, 570:
• 421-428-High Side to Low Side Open
• 431-436-Hgh Side Shorted to Low Side
• 451-456-High Side Shorted to Ground or Vbat
• 513-Low Side to Bank 1 Open
• 514­Low Side to Bank 2 Open
• 515-Bank 1 Low Side Short to Ground
• 521-Bank 2 Low side Short to Ground
CODE GROUP 2
(EPA 2007) MaxxForce DT, 9, 10:
• 8001, 8002, 8003, 8004, 8005, 8006-1-Cylinder Balance Below Minimum Limit
• 8001, 8002, 8003, 8004, 8005, 8006-0-Cylinder Balance Maximum Limit Exceeded

CPA Tool Steps:
NOTE:
'Signal Check' does not diagnose cylinders; it is part of the set up process and checks for a strong CMP and CKP signal. The
'Signal Check' will NOT issue a WAC

1. Perform one of the following tests:
a. 'Cold Idle' (perform Signal Check after running the Cold Idle test)
b. 'Hot Idle' (Signal Check highly recommended first)
c. 'Perform Signal Check' (required in order to perform any road test)
d. 'Full Load to Highway Speed' (road test)­ DO NOT USE ON 2013 MaxxForce 9, 10 & DT OBD ENGINES
e. 'User Defined' (Tech Services will instruct technicians as needed)
f. 'Recorder' (newly offered, no WAC provided. Enables "Sensor 3 &4" of the CPA Tool- Tech Service will instruct as needed)
2. If there is an issue with one or two cylinders, a WAC will be generated.
NOTE:
A WAC does not confirm a failed injector, but does confirm that the cylinder has a problem. Condensed Performance Diagnostics
may point out other conditions such as a valve train or compression concerns.
Disregard the WAC if repairing the injector harness or connector corrects the performance complaint.

Attaching CPA Test Results to a Case File:
1. Create a Technical Service Case File and note in the issue description the details of the symptoms and test results.
2. Follow all of the diagnostic procedures as outlined in this article
3. Run the tests using the CPA Tool as outlined in this article.
Attaching Recorded Data To Case File:
When using the Cylinder Performance Analyzer, the data recorded must be attached to the Tech Services Case File. To attach the data to a
Case File, follow the steps and screenshots below:

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IK1200812 ­ Diagnosing Cylinder Missfires Using the CPA Tool (I6 Engine)

Page 3 of 4

1. From case file home page, select 'Browse' (Figure 3).

2. Select the 'Engine Cylinder Performance Analyzer' folder.
­ The folder is defaulted on the computer’s desktop. (Figure 4).

3. Select the WinZip File(s) from the appropriate test recording(s) (Figure 5).

NOTE:
When a CPA test is conducted, the program automatically saves four files into the Engine Cylinder Performance Analyzer desktop
folder. The four files are a: CPA File, MF3 File, JPEG File, and a WinZip File. The ONLY file that needs to be uploaded onto the case
file is the WinZip File.
4. Verify the WinZip File is under the Attachments section of the case file home screen.

Condensed Performance Diagnostics:
A. (EPA 2007) Based on EGED380 (steps):

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IK1200812 ­ Diagnosing Cylinder Missfires Using the CPA Tool (I6 Engine)

Page 4 of 4

1. Visual Inspection
2.1 Fuel Quality
2.2 Fuel Pressure and Aeration
3. Sensor compare
4. Check for Diagnostic Trouble Codes (DTCs)
◦ Example of SRT for this is K12-2240K Steps 1-4 for 2007 MaxxForce DT in 4300 (.8 hours)
-IPR Circuit Test: wiggle IPR connector with engine idling & listen for stumble (not cited in EGED380)
­Run CPA Tool test
B. (EPA 2004 DT466, 570) Based on EGED290-1 (steps):
1. Diagnostic Trouble Codes
2. KOEO Standard Test
3. KOEO Injector Test
4. Engine Oil
5. Fuel
6. Fuel Pressure and Aerated Fuel
12. Relative Compression
-IPR Circuit Test: wiggle IPR connector with engine idling & listen for stumble (not cited in EGED380)
-Run CPA Tool test
Cylinder Performance Analyzer Test:
The CPA test analyzes the crankshaft and camshaft speed signals to determine cylinder performance. The data is processed by the CPA tool
and indicates which cylinder(s) has a performance issue. The CPA tool assists the technician in the evaluation of performance concerns.
1. Launch the CPA tool from Navistar Engine Diagnostics™ and follow the instructions for the CPA tool.
2. Connect CMP and CKP breakout cables to the sensors and CPA tool. Rotate both knobs (POT) fully clockwise +(right).
3. Select appropriate test
-Cold Idle test (perform Signal Check after running the Cold Idle test)
­Hot Idle test (complete Signal Check first)
-Signal Check (Signal Check is required before a road test)
­Full Load to Highway Speed test (road test).
If the CPA Tool generates a WAC Code, inspect for mechanical damage and inspect the injector wiring and all related connectors. Otherwise,
replace the failed injector.

Contact Information
If you would like to order additional Tools, have questions, concerns, feedback, or need replacement parts, please contacts the Navistar
Service Tool Support Center.
Phone: 1-800-365-0088

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(Toll Free) or 630-985-4171

OR Submit a Service Tool IKNow Case

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