NHTSA ID Number: 10115443
Manufacturer Communication Number: IK1201314
TSB/Document Date: 2017-08-16
Summary
Performing RCT (Relative Compression Test) and misfire test with CPA Tool
IK1201314 Performing RCT (Relative Compression Test) and misfire test with CPA Tool Page 1 of 4
Countries:
CANADA, UNITED STATES Document ID: IK1201314
Availability:
ISIS, Bus ISIS
Revision:
7
Major System:
ENGINES
Created:
12/1/2015
Current Language: English
Last Modified: 6/21/2016
Other Languages: NONE
Author:
Viewed:
Mark Ehlers
5554
Less Info
Coding Information
Hide Details
Copy Link
Copy Relative Link
Bookmark
Add to Favorites
Edit Document
Provide Feedback
View My Bookmarks
Helpful
Not Helpful
30
18
Title : Performing RCT (Relative Compression Test) and misfire test with CPA Tool
Applies To : MaxxForce 7, DT, 9, 10, 11, 13, N9, N10, N13
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
06/21/2016- Updates MF7 RCT instructions
05/24/2016- Added info about RCT+
03/30/2016- Added "DT" to applies to and memory error tip
03/14/2016- Added RCT instructions for I6 and 13L and updated CPA software version and
added SRT's
01/29/2016- Revised images and PDF and note about Cylinders 3 and 8 on graphs
12/09/2015 - Initial Article Release
Temporary note: If you get a CPA memory error after completing a RCT or RCT+ the file can still be read by Tech Services. To avoid
this error press "Stop Test" when the CPA prompts you to start cranking for the 3rd time. The CPA will process the test and create a results
graph. We are working on a fix.
DESCRIPTION
Navistar
has released new tests for the Cylinder Performance Analyzer (CPA) called Relative Compression Test (RCT) and Misfire (named
"Idle") for MaxxForce 7 engine
The CPA RCT is more reliable than the ServiceMaxx RCT because of the CPA's signal processing capabilities which results in more accurate
cylinder compression analysis.
The CPA RCT identifies low cylinder compression which is a result of worn cylinders, valve train issues, bent connecting rod, etc.
The CPA Idle test can identify misfires & weak cylinders caused by failing injectors, valve train issues, and other causes. It does not issue a
WAC at this time but shows in graph form each cylinders contribution.
1. In order to perform a CPA RCT the CPA software must be updated to version 7.8.8.1 or higher . IK2700062 covers the software update
process.
2. CPA RCT & Idle test does not issue a WAC but a later version will add this capability
3. As with other CPA tests the set-up instructions for RCT and Idle test are imbedded in the CPA software (MF7 only)
4. CPA RCT can be performed on MaxxForce 7, DT, 9, 10, N9, N10, and MaxxForce 13 & N13
◦ Instructions for performing RCT for MF 7 are here (printing is recommended)
◦ Instructions for performing RCT on MaxxForce 9, 10, DT, N9, and N10 are here (printing is recommended)
◦ Instructions for performing RCT on MaxxForce 11, 13 and N13 are here (printing is recommended)
5. CPA RCT+ instructions are here (and will soon be added to the software and diagnostic manuals). RCT+ requires the CPA
PressurePlus module (added May 2016)
SYMPTOM(s)
The CPA RCT and RCT+ can assist you when diagnosing the following:
•
•
•
•
•
•
•
DPF failures & repeat DPF failures or short DPF life
High blow-by
Oil carryover at road draft tube
Air compressor front seal leaks
Repeat oil leaks
Low power
High oil consumption
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 7/1/2016
IK1201314 Performing RCT (Relative Compression Test) and misfire test with CPA Tool Page 2 of 4
•
•
•
•
Misfiring
Engine noises
Suspected bent connecting rod due to hydrolocked (excess coolant or fuel entered cylinder)
Hard Starts
The CPA Idle test (misfire) can assist you when diagnosing the following:
•
•
•
•
•
•
DPF failures
Repeat DPF failures or short DPF life
Oil carryover at road draft tube
Low power
Misfiring or weak cylinder
Suspected bent connecting rod due to hydrolocked (excess coolant or fuel entered cylinder)
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
DTC/Light
Description
SPN xxxx FMI xx (link to FCAP)
none at this time
SPN xxxx FMI xx (link to FCAP)
Customer Observations or Concerns:
See symptoms (above)
SPECIAL TOOL(s) / SOFTWARE
Tool Description
Tool Number
CPA Kit
12-999-01
CPA to banana 12"
extension
12-999-01-08
Banana to alligator
clamps
Fluke or other
Comments
Instructions
test leads with alligator
clamps at each end will also
work
Tools Resource Center
SERVICE PARTS INFORMATION
.
Kit Description
Part Number
Quantity
Notes
Required
not applicable
DIAGNOSTIC STEP(s)
Technicians should have completed the CPA training in the LMS and have read the CPA Manual
before performing these new CPA tests.
• Perform CPA RCT instead of performing a manual compression test.
• Launch the new tests by Selecting "BEAM" from the main CPA screen
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 7/1/2016
IK1201314 Performing RCT (Relative Compression Test) and misfire test with CPA Tool Page 3 of 4
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 7/1/2016
IK1201314 Performing RCT (Relative Compression Test) and misfire test with CPA Tool Page 4 of 4
REPAIR STEP(s)
Use CPA RCT and RCT+ in place of a manual compression test and whenever ServiceMaxx RCT is inconclusive
Contact Tech Services before making repairs to an engine because of a CPA RCT / RCT+ or Idle test result.
WARRANTY INFORMATION
Warranty Claim Coding:
Group: NA
Noun: NA
Standard Repair Time(s):
Repair
Model
SRT
Hours
CPA Idle (misfire) test
All
MaxxForce7
A12-2158X
.3
CPA RCT (Relative Compression Test)
All
MaxxForce7
A12-2158X
.3
CPA RCT+ (requires a loaner tool)
All
MaxxForce7
TTime
.6
CPA Cylinder / Injector test and RCT
All
MaxxForce DT & N9 &N10 A122158K
CPA Cylinder / Injector test and RCT
All
MaxxForce 13 & N13
.6
A12-2158U-20 .8
- Link to the Standard Repair Time Manual: Click Here
OTHER RESOURCES
Master Service Information Site
Hide Details
Feedback Information
Viewed:
5553
Helpful:
30
Not Helpful: 18
No Feedback Found
Copyright © 2016 Navistar, Inc.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 7/1/2016
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 📌【We are Here for You】Dear valued customer, please be...
- 🚀【5X Faster Next-Level Hardware, Same as MK900/ MX...
- 🔥【3000+ Active Tests = MK900/MK900BT but...
- 📢【2026 U.S. Version, All-in-One as MK808S/ MK808Z...
- 🔥【28+ Hot Services for 150+ Brands】Same as MaxiCOM...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: IK1201314
Replacement Service Bulletin Number:
MFR Communication Date: 2016-06-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.