DIAPHRAGM 1716696 - Caterpillar

Use this procedure to troubleshoot a high fuel flow in the high-pressure fuel system. Also, use this procedure if one of the following event code is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
157-17
Engine Injector Metering Rail #1 Pressure : Low - least severe (1) E398 (1)
Low Fuel Rail Pressure The fuel rail pressure is below an acceptable level.
The check engine light will illuminate.
The code is logged.
157-18
Engine Injector Metering Rail #1 Pressure : Low - moderate severity (2) E398 (2)
Low Fuel Rail Pressure The fuel rail pressure is below an acceptable level.
The check engine light will illuminate.
The code is logged.
1440-0
Engine Fuel Flow Rate #1 : High - most severe (3) E1106 (3)
High Fuel Rail Pump Flow There is excessive leakage in the high-pressure fuel system.
The check engine light will illuminate.
The code is logged.
1440-15
Engine Fuel Flow Rate #1 : High - least severe (1) E1106 (1)
High Fuel Rail Pump Flow There is excessive leakage in the high-pressure fuel system.
The check engine light will illuminate.
The code is logged.
1440-16
Engine Fuel Flow Rate #1 : High - moderate severity (2) E1106 (2)
High Fuel Rail Pump Flow There is excessive leakage in the high-pressure fuel system.
The check engine light will illuminate.
The code is logged.
5585-17
Engine Injector Metering Rail #1 Cranking Pressure : Low - least severe (1) E1220 (1)
Low Cranking Fuel Rail Pressure The fuel rail pressure is too low while cranking.
This can be caused by a fuel system service prior to starting the engine.
Table 2
Associated Codes
J1939 Code CDL Code Troubleshooting Procedure
95-0 E390 (3) Troubleshooting, "Fuel Filter Is Restricted"
95-15 E390 (1) Troubleshooting, "Fuel Filter Is Restricted"
95-16 E390 (2) Troubleshooting, "Fuel Filter Is Restricted"
5578-3 289-3 Troubleshooting, "Sensor Signal (Analog, Active) - Test"
5578-4 289-4 Troubleshooting, "Sensor Signal (Analog, Active) - Test"
5580-3 460-3 Troubleshooting, "Sensor Signal (Analog, Active) - Test"
5580-4 460-4 Troubleshooting, "Sensor Signal (Analog, Active) - Test"
5580-17 E198 (1) Troubleshooting, "Fuel Pressure Is Low"
5580-18 E198 (2) Troubleshooting, "Fuel Pressure Is Low" Probable Causes
Codes
Sensor
Leaks
High-pressure lines
Accumulator quill tube studsRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E1220 or a 5585 code is active or logged.
Proceed to Test Step 2.
Result: An E398, E1106, 157, or a 1440 code is active or logged.
Proceed to Test Step 3.
2. Check the Service History
Note: An E1220 or 5585-17 code can be caused by a recent service on the fuel system. If the high-pressure system was not primed after the last service, this code will log.
A. Prime the fuel system.
B. Connect Cat ET.
C. Clear the fault E1220 or 5585 code.
D. Start the engine.
Codes
Result: An E1220 or a 5585 code became active.
Proceed to Test Step 4.
Result: An E1220 or a 5585 code did not become active.
The high-pressure fuel system was not properly primed.
Proceed to Test Step 12.
3. Perform a "Fuel System Functional Test"
A. Remove the accumulator leak detection plugs.
B. Connect