HARNESS AS 3141690 - Caterpillar

Table 1
Diagnostic Trouble Codes    
CDL Code    J1939 Code    Code Description    Comments    
E499 (3)     1239-0     Fuel Rail #1 Pressure Leak     The fuel rail pressure is below an acceptable level.
The code is logged.    
Table 2
Associated Diagnostic Trouble Codes    
J1939 Code     CDL Code    
5580-18     E198(2)    
157-17     E398(1)    
Table 3
Troubleshooting Test Steps    Values    Results    
1. Check for Associated Codes
A. Establish communication between Cat® Electronic Technician (ET) and the Engine Electronic Control Module (ECM).
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. If any of the associated codes in Table 2 are logged, troubleshoot the codes before continuing with this procedure.
   
Associated Codes    
Result: An associated code is active or logged.
Repair: Troubleshoot the associated codes before continuing with this procedure.
Result: An associated code is not active or logged.
Proceed to Test Step 2.    
2. Inspect the Fuel System
A. Inspect the fuel system. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Inspect" for inspection of the high-pressure fuel lines and the fuel rail.
   
Fuel System    
Result: Problems were found with the fuel system.
Repair: Repair the components or replace the components that are damaged. Verify that the problem is resolved.
Result: Problems were not found with the fuel system.
Proceed to Test Step 3.
   
3. Check the Fuel Rail Sensor
A. Allow the engine to be OFF for 10 minutes.
B. Turn the keyswitch to the ON position, do not start the engine.
C. Connect to the Engine ECM using Cat ET.
D. Using Cat ET, check the status of the "Fuel Rail Pressure (absolute)".
   
Rail Pressure Less Than 5,000 kPa (725 psi)     Result: The pressure dropped below
5,000 kPa (725 psi) after the engine was shut off for 10 minutes.
Proceed to Test Step 4.
Result: The pressure did not drop below
5,000 kPa (725 psi) after the engine was shut off for 10 minutes.
Repair: Replace the fuel rail pressure sensor. If the problem has been corrected, return the unit to service.
   
Illustration 1 g03383455
Location of the "Fuel System Functional Test" in the "Diagnostic Service Test" menu
Illustration 2 g03383456
If an E398 Low Fuel Rail Pressure fault is active, the "Fuel System Functional Test – Pretest" will not be able to run. Uncheck the "Fuel System Functional Test – Pretest" box and proceed to the "Fuel System Functional Test"
Table 4
Troubleshooting Test Steps    Values    Results    
4. Perform the "Fuel System Functional Test"
A. Start the engine.
B. Connect to the Engine ECM using Cat ET.
C. Perform the "Fuel System Functional Test" in Cat ET. Cat ET will display an error message that indicates the problem. Follow the repair procedure for the error message. If the test aborts for an active diagnostic make sure to troubleshoot the code first.
If an E398 Low Fuel Rail Pressure fault is active, the "Fuel System Functional Test – Pretest" will not be able to run. Uncheck the box and proceed to the "Fuel System Functional Test".    
Test Passed