LATCH AS-DOOR 8T9048 - Caterpillar

Note: Refer to Troubleshooting, "Cat ET Service Features" for information about service features.Use this procedure in order to troubleshoot low fuel rail pressure or use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".Note: Some of the following codes may not be applicable for certain applications.Note: The E398 code may activate when the water separator is being drained. Disregard the code and toggle the keyswitch to clear the code.
Table 1
Diagnostic Trouble Codes    
CDL Code    J1939 Code    Code Description    Comments    
E398 (1)     157-17     Low Fuel Rail Pressure     The fuel rail pressure is below an acceptable level.
The code is logged.
The check engine light will illuminate.    
Table 2
Associated Diagnostic Trouble Codes    
CDL Code     J1939 Code    
1779-5     1347-5    
1779-6     1347-6    
1780-5     1348-5    
1780-6     1348-6    
1797-3     157-3    
1797-4     157-4    
390-1     614-15    
390-2     614-16    
198-1     5580-17    
198-2     5580-18    Troubleshooting Procedure
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. Inspe