C7.1 Industrial Engine and Generator Set Caterpillar

This procedure covers the following diagnostic trouble codes:

Illustration 1	g02315455
Components of the NRS cooler (1) Coolant inlet pipe (2) NRS Exhaust inlet pipe (3) NRS cooler (4) NRS Exhaust outlet pipe (5) Coolant outlet pipe

Test Step 1. Check for Associated Diagnostic Trouble Codes

1. Establish communication between the electronic service tool and the ECM . If necessary, refer to Troubleshooting, "Electronic Service Tools".

2. Determine if an associated code is active or logged. Table 2 lists associated diagnostic codes.
   Show/hide table

   Table 2

   Associated Codes
   J1939 Code	Description
   110-15	Engine Coolant Temperature : High - least severe
   110-16	Engine Coolant Temperature : High - moderate severity
   110-0	Engine Coolant Temperature : High - most severe

Results:

• There are associated codes. -

  Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" in order to troubleshoot the associated diagnostic code.

  STOP

• A 412 code and a 2659-18 code are present. - Proceed to Test Step 3.

• There are no associated codes. - Proceed to Test Step 2.

Test Step 2. Perform an Air Systems Service Test

Refer to Illustration 1.

1. Establish communication between the electronic service tool and the ECM .

2. Select "Diagnostics" from the toolbar at top of screen.

3. Select "Diagnostic Tests" from the drop-down menu.

4. Select "Air Systems Motor Valve Verification Test".

Results:

• The air systems service test did not complete due to a 412-16 code. -

  Repair: Perform the following procedure:

  1. Remove the exhaust inlet (2) and the exhaust outlet (4) from the NRS cooler (3) .

  Note: During the following inspection, some condensation may be present in the NRS cooler. This condition is normal.

  2. Inspect the internal passage of the NRS cooler for evidence of coolant.

  3. If significant amount of coolant is found, replace the NRS cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install".

  STOP

• The air systems test completed successfully. - Proceed to Test Step 3.

Test Step 3. Inspect the NRS Cooler

Refer to Illustration 1.

Perform a leak test on the NRS cooler. Refer to Systems Operation, Testing, and Adjusting, "Exhaust Cooler (NRS) - Test".

Results:

• The NRS cooler has internal leakage. -

  Repair: Perform the following procedure:

  1. Replace the NRS cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install".

  2. Use the electronic service tool to clear all related diagnostic trouble codes.

  3. Run the engine and ensure that the fault has been eliminated.

  4. If the fault is still present, contact the Technical Communicator at a Caterpillar dealer.

  STOP

• The NRS cooler did not have internal leakage. -

  Repair: Perform the following procedure:

  1. Use the electronic service tool to clear all related diagnostic trouble codes.

  2. Run the engine until the normal operating temperature is reached and ensure that the fault has been eliminated.

  3. If the fault is still present, contact the Technical Communicator at a Caterpillar dealer.

  STOP