0306490 JOHNSON SCREW

Illustration 1 g06372057
(1) EGR temperature sensor (post-cooler)
Illustration 2 g06372072
(2) EGR cooler
(3) EGR valve
(4) EGR differential and inlet pressure sensor
(5) EGR temperature sensor (pre-cooler)
Table 2
Associated Codes
J1939 Code
412-15
412-16 Probable Causes
Diagnostic codes
Electrical connectors and harness
Air inlet and exhaust system
NRS differential and inlet pressure sensor
NRS temperature sensors
NRS coolerRecommended Actions
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 3
Troubleshooting Test Steps Values Results
1. Download Information Using the Electronic Service Tool
A. Use the electronic service tool to download the "Product Status Report" (PSR) with histograms before performing any troubleshooting or clearing any diagnostic codes.
Note: The downloaded information will be required by the Dealer Solutions Network (DSN) if troubleshooting assistance is required.
Downloaded information
Result: The information was successfully saved.
Proceed to Test Step 2.
Result: The electronic service tool information was not successfully saved.
Contact the Dealer Solutions Network (DSN) for guidance.
2. Create an Electronic Service Tool Snapshot
A. Select "Snapshot Viewer" on the electronic service tool, using menus: Information -> Snapshot -> Viewer
B. Select the event code and then click "View Graph".
C. Select the following parameter and then click OK.
Engine Speed
D. Select Save to "File to save" a Snapshot File (*.xml). This file will contain all the data in the snapshot and not only the data shown on the graph.
Note: The downloaded information will be required by the DSN if troubleshooting assistance is required.
Snapshot saved
Result: The electronic service tool snapshot was successfully saved.
Proceed to Test Step 3.
Result: The electronic service tool snapshot was not successfully saved.
Contact the DSN for guidance.
3. Diagnostic Codes
A. Use the electronic service tool to check for active or logged codes.
Diagnostic codes
Result: An associated code is active or logged.
Repair: Troubleshoot associated codes before continuing with this procedure. Refer to Troubleshooting, Diagnostic Trouble Codes or Troubleshooting, Event Codes for further information.
Result: A diagnostic code for the NRS valve is active or logged.
Repair: Rectify the NRS valve code. Refer to Troubleshooting, "Motorized Valve - Test".
Result: A 2659-7 diagnostic code with no ETI is active.
Proceed to Test Step 4.
Result: A 2659-7 with an ETI of 1 is active.
Proceed to Test Step 8.
4. Inspect the Electrical Connectors and the Harness
A. Turn the keyswitch to the OFF position.
B. Inspect the connectors for the components in the NRS system. Refer to Illustration 1 and Illustration 2. Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Perform a 30 N (6.7 lb) pull test on each of the wires in any suspect connector.
D. Check that the ground connection on the ECM and the negative terminal on the battery are correctly installed.
E. Check the ground connection on the ECM for abrasions and pinch points.
F. Check the harness for abrasion and pinch points from the NRS components to the ECM.
G. Check that any suspect connector is installed correctly.
Connectors and harness
Result: An electrical connector or a cable is not correctly installed.
Repair: Install the connector or cable correctly.
Result: The harness is faulty.
Repair: Install a replacement harness.
Result: The harness and connectors are OK.
Proceed to Test Step 5.
5. Check the Air Inlet and Exhaust System
A. Check the air inlet system for leaks and for restrictions.
B. Check the exhaust system for leaks and for restrictions.
Air inlet and exhaust system
Result: The air inlet system has a leak or is restricted.
Repair: Clear any restrictions in the air inlet system.
Repair any air leaks in the air inlet system.
Result: The exhaust system has a leak or is restricted.
Repair: Clear any restrictions in the exhaust system.
Repair any air leaks in the exhaust system.
If the fault is still present, proceed to Test Step 6.
6. Check the NRS Differential and Inlet Pressure Sensor
A. Remove EGR differential and inlet pressure sensor (4). Refer to Disassembly and Assembly, Pressure Sensor (Cooled Exhaust Gas) - Remove and Install..
B. Check the pressure sensor for restrictions or blockages. Check the sensor port for restrictions or blockages.
Pressure sensor and pipes
Result: There is a restriction or a blockage in the sensor or the sensor port.
Repair: If possible, clear the blockage or restriction. If necessary, replace parts.
Result: There are no restrictions or blockages in the sensor or the sensor port.
Proceed to Test Step 7.
7. Check the NRS Temperature Sensors
A. Remove temperature sensor (1) and temperature sensor (5). Refer to Disassembly and Assembly, "Temperature Sensor (Cooled Exhaust Gas) - Remove and Install".
B. Check the sensor probes for excessive deposits.
Temperature sensor
Result: The probe on the temperature sensor has excessive deposits.
Repair: Carefully remove the deposits from the sensor probe. Make sure that the sensor probe is not damaged.
If the deposits cannot be easily removed, replace the temperature sensor. Refer to Disassembly and Assembly, "Temperature Sensor (Cooled Exhaust Gas) - Remove and Install".
Result: The probe on the temperature sensor does not have excessive deposits.
Procee