UNION AS-CROSS 2417944 - Caterpillar

Table 1
Diagnostic Trouble Codes for High Fuel Temperature    
J1939 Code    Code Description    Comments    
174-15     Engine Fuel Temperature 1 : High - least severe (1)     The temperature of the low-pressure fuel in the high-pressure fuel pump is high.
The ECM has been powered for at least 2 seconds.
The engine has been operating for at least 185 seconds.
There are no other faults in the electrical system.
The warning lamp will come on.
The warning lamp will go off when the temperature drops below the trip point.    
174-16     Engine Fuel Temperature 1 : High - moderate severity (2)     The temperature of the low-pressure fuel in the high-pressure fuel pump is high.
The ECM has been powered for at least 2 seconds.
The engine has been operating for at least 185 seconds.
There are no other faults in the electrical system.
The warning lamp will come on.
The engine may be derated by 20%.
The warning lamp will go off when the temperature drops below the trip point for 15 seconds.    Probable causes
Incorrect position of fuel shut-off valves
Fuel level in tank
Return fuel cooler (if equipped)
Return fuel lines
Location of the fuel tankRecommended Actions
Note: Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Incorrect Position of Fuel Shut-off Valves
A. Make sure that any fuel shut-off valves in the feed lines between the fuel tank and the engine are open.
B. Make sure that any fuel shut-off valves in the return lines between the engine and the fuel tank are open.
   
Valve positions
   
Result: A fuel valve is closed or not fully open.
Move the valve to the fully open position.
Result: All fuel valves are fully open.
Proceed to Test Step 2.
   
2. Fuel Level in Tank
Note: If the level in the