0303734 EVINRUDE LINK

Table 1
J1939 Code and Description CDL Code and Description Comments
411-15
High EGR Differential Pressure E1094 (1)
High EGR Differential Pressure The Electronic Control Module (ECM) detects an abnormally high reading from the NRS differential pressure sensor.
411-17
Low EGR Differential Pressure E1093 (1)
Low EGR Differential Pressure The ECM detects an abnormally low reading from the NRS differential pressure sensor.
2659-15
High EGR Mass Flow Rate E1096 (1)
High EGR Mass Flow Rate The ECM detects a higher than desired flow rate through the NRS
2659-17
Low EGR Mass Flow Rate E1095 (1)
Low EGR Mass Flow Rate The ECM detects a lower than desired flow rate through the NRS
3358-16
EGR Inlet Pressure : High - moderate severity (2) E1090 (2)
High EGR Intake Pressure The ECM detects a higher than desired flow rate through the NRS
Table 2
Associated Codes
E1154
E1092
3609-17
3609-18
412-15
412-16 Recommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Establish communication between Cat® Electronic Technician (ET) and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Troubleshoot any active or logged codes before troubleshooting the event codes outlined in this procedure.
C. Determine if an associated code is active or logged. Table 2 lists associated diagnostic codes.
Associated Codes
Result: There are associated codes.
Repair: Refer to Troubleshooting, "Event Codes" to troubleshoot the associated diagnostic code.
Result: There are no associated codes. If the original code was a E1096 and/or a 2659-15.
Proceed to Test Step 2.
Result: There are no associated codes. If the original code was a E1093, E1094, 411-17 and/or 411-15.
Proceed to Test Step 5.
Result: There are no associated codes. If the original code was a E1095, 2659-17, or 3358-16.
Proceed to Test Step 2.
2. Inspect the NRS for Leakage
A. Inspect the following components of the NRS for leakage:
- Exhaust manifold
- Connections for NRS cooler inlet and NRS cooler outlet
- NRS venturi inlet and outlet connections
- Port locations for NRS differential pressure sensor and NRS absolute pressure sensor
- Connections for NRS inlet valve and NRS outlet valve
Note: Common signs of a leak in the NRS are loose connections, damaged lines, or components and exhaust soot buildup around the area that is leaking.
Leakage
Result: Leaks were not found in the system.
Proceed to Test Step 3.
Result: Leaks were found in the system.
Repair: Repair the leaks.
1. Reset all active codes and clear all logged codes. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
3. Use Cat ET to Perform an "EGR System Test"
A. Start the engine.
B. Use Cat ET to perform an "EGR System Test".
"EGR System Test"
Result: The "EGR System Test" fails due to "Delivered Fuel Volume Not Responding".
Proceed to Test Step 4.
Result: The "EGR System Test" fails due to "EGR Delta Pressure Not Responding".
Proceed to Test Step 5.
Result: The "EGR System Test" fails due to "EGR Absolute Pressure Not Responding".
Proceed to Test Step 6.
Result: The "EGR System Test" fails due to "EGR Mass Flow Rate Incorrect".
Proceed to Test Step 4.
4. Inspect the NRS Valve
A. Remove actuator assembly from NRS valve body.
B. Use a straight screwdriver to rotate the valve inside the NRS valve body. The valve should freely rotate from the open to close positions for 90 degrees of rotation.
Valve Rotates Freely
Result: NRS valve does not rotate at all, or the valve is difficult to rotate.
Repair: Replace the NRS valve body and install the actuator assembly that was previously removed.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
Result: NRS valve does rotate freely from open to close.
Repair: Install new actuator assembly.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
If the problem is not resolved, proceed to Test Step 5.
5. Inspect the Mounting Location for the NRS Differential Pressure Sensor
A. Remove the NRS differential pressure sensor.
B. Inspect the mounting location for signs of accumulations of soot. The accumulation may indicate further accumulations of soot downstream in the pressure passages.
Soot Build-Up
Result: Soot build-up is evident in the NRS differential pressure sensor passages.
Repair: Remove the NRS venturi. Use hot soapy water and a bore brush to clean out the passages for the NRS venturi differential pressure.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
Result: Little or no soot build-up evident.
Repair: Replace the NRS differential pressure sensor.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
6. Inspect the NRS Absolute Pressure Sensor and the Mounting Location
A. Remove the NRS absolute pressure sensor.
B. Visually inspect all the mounting locations for signs of excessive soot. The excessive soot may indicate further buildup downstream in the pressure passages.
Soot Build-Up
Result: Soot build-up is evident in the absolute pressure sensor passage.
Repair: Remove the NRS venturi. Use hot soapy water and a bore brush to clean the passages. Install the NRS venturi.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
Result: Little or no soot build-up evident.
Repair: Replace the NRS absolute pressure sensor.
1. Reset all active codes and clear all logged codes by cycling the keyswitch to Off. Use Cat ET to perform an "EGR System Test" to verify that the problem is resolved.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).