832074A 5 Mercury STATOR

Table 1
Diagnostic Trouble Codes for the NOx Sensors
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
3216-7 E1431 (2) Aftertreatment #1 Intake NOx : Not Responding Properly The engine out NOx level is not responding as expected.
The code is logged.
3226-7 E1432 (2) Aftertreatment #1 Outlet NOx : Not Responding Properly The tailpipe out NOx level is not responding as expected.
The code is logged.
Follow the troubleshooting procedure to identify the root cause of the problem.
Table 2
Required Tools
Tool Part Number Part Description Qty
A 441-0451 Tool Gp 1 During the following procedure, refer to the electrical schematic for the application.Complete the procedure in the order in which the steps are listed.
Table 3
Troubleshooting Test Steps Values Results
1. Check that the latest available software is installed and there are no applicable Technical Information Bulletins or Special Instruction documentation released
A. Ensure that the latest software is installed on the engine ECM.
If necessary, refer to Troubleshooting, "ECM Software - Install" for the correct procedure.
B. Ensure all Technical Information Bulletins and/or Special Instruction documented for the issue and/or product are reviewed and followed.
Software and Publications
Result: The latest software is not installed.
Repair: Install the latest engine ECM software. If necessary, refer to Troubleshooting, "ECM Software - Install" for the correct procedure.
Start the engine and wait for 2 minutes.
If the fault is cleared, return the engine to service.
If the fault is still present, proceed to Test Step 2.
Result: Applicable Technical Information Bulletin/Special Instruction publication is available.
Repair: Review and follow instructions provided in the available publication.
Result: The latest software is installed.
Proceed to Test Step 2.
2. Check the Diesel Exhaust Fluid (DEF) Quality
A. Measure the DEF quality. Refer to Systems Operation, Testing and Adjusting, "Diesel Exhaust Fluid Quality - Test" for the correct procedure.
DEF Quality
Result: The DEF is not contaminated and the concentration is not within the acceptable range.
Repair: Drain the DEF from the tank. Refill the tank with DEF that meets ISO 22241 quality standards.
Proceed to Test Step 4.
Result: The DEF is not contaminated and the concentration is within the acceptable range.
Proceed to Test Step 3.
Result: The DEF is contaminated.
Repair: Contact the Dealer Solutions Network (DSN) for further information.
3. Perform a DEF Dosing System Accuracy Test
A. Perform a "DEF Dosing System Accuracy Test". Refer to Testing and Adjusting, "Aftertreatment SCR System Dosing - Test" for the correct procedure.
DEF Dosing System Accuracy Test
Result: The amount of DEF collected is within specification.
Repair: Install the DEF injector. Refer to Disassembly and Assembly, DEF Injector and Mounting - Remove and Install.
Proceed to Test Step 5.
Result: The amount of DEF collected is below specification.
Proceed to Test Step 4.
Result: The amount of DEF collected is above specification. A failed DEF injector has been detected.
Repair: Replace the DEF injector. Refer to Disassembly and Assembly, DEF Injector and Mounting - Remove and Install for the correct procedure.
Proceed to Test Step 5.
4. Check the DEF Pressure Line
A. Turn the keyswitch to the OFF position. Allow 2 minutes to elapse before proceeding.
B. Visually inspect the lines for leaks or damage.
C. Remove the DEF pressure line between the DEF pump and the DEF injector. Refer to the Disassembly and Assembly manual for the correct procedure.
D. Inspect the DEF pressure line for obstructions. Flush the line with water or low-pressure air, if necessary. Possible obstructions are ice, DEF deposits, or debris.
Restrictions, obstructions, or leaks
Result: There are restrictions or leaks in the lines.
Repair: Remove the restrictions or replace the pressure line.
Proceed to Test Step 5.
Result: There are no restrictions or leaks in the lines.
Repair: Proceed to Troubleshooting, "DEF Pressure is Low".
5. Perform an "Aftertreatment System Functional Test"
A. Connect the electronic service tool to the diagnostic connector.
B. Perform a "Aftertreatment System Functional Test".
Successful completion of test
Result: The test completed successfully.
Return the unit to service.
Result: The test did not complete successfully.
Proceed to Test Step 6.
6. Low Compression (Cylinder Pressure)
A. Perform a compression test. Refer to Systems Operation, Testing, and Adjusting, "Compression - Test".
Cylinder compression
Result: The results of the compression test are outside the specifications.
Repair: Investigate the cause and rectify any faults.
Note: Possible causes of low compression are shown in the following list:
Loose glow plugs
Faulty piston
Faulty piston rings
Worn cylinder bores
Worn valves
Faulty cylinder head gasket
Damaged cylinder head
Result: The results of the compression test are OK.
Proceed to Test Step 7.
7. Electronic Unit Injectors
A. Use the electronic service tool to perform the automatic "Cylinder Cutout Test". Refer to Troubleshooting, Service Tool Features for more information.
Note: If the compression test that was performed in Test Step 4 was satisfactory, the "Cylinder Cutout Test" will identify any faulty injectors.
Electronic Unit Injectors
Result: A faulty injector is indicated.
Repair: Remove any faulty electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove".
Install new electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Install".
Repeat the automatic "Cylinder Cutout Test". If the fault is still apparent, remove the replacement electronic unit injector and install the original electronic unit injector. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove" and Disassembly and Assembly, "Electronic Unit Injector - Install".
Result: All injectors are OK.
Proceed to Test Step 8.
8. Check the Exhaust System for Leaks
A. Check the entire exhaust system for leaks.
Exhaust leaks
Result: No exhaust leaks were identified.
Repair: Ensure that the latest engine software is installed. Refer to Troubleshooting, ECM Software - Install for the correct procedure.
For a 3216-7 or E1431 (2) code, replace the intake NOx sensor.
For a 3226-7 or E1432 (2) code, replace the outlet NOx sensor.
Proceed to Test Step 9.
Result: Exhaust leaks were identified.
Repair: Repair the exhaust leaks.
Proceed to Test Step 9.
9. Check the Aftertreatment System for Oil or Fuel
A. Remove excess oil or fuel from the piping with a clean cloth.
B. Remove the Clean Emissions Module (CEM). Refer to Disassembly and Assembly, "Clean Emissions Module - Remove and Install".
C. Support the CEM over a suitable container with the exhaust inlet downwards. Leave the CEM to drain for 8 hours.
D. Check