RING 6E6158 - Caterpillar

Probable Causes
Diagnostic codes
Event codes
Electrical power supply to the Electronic Control Module (ECM)
Engine shutdown switches (if applicable)
Engine speed/timing
Low-pressure fuel system
Unit injectors
Fuel Quality
Gear trainRecommended Actions
Note: If Cat ET will not communicate with the ECM, the problem is most likely with the electrical power supply to the ECM. Refer to Troubleshooting, "Electrical Power Supply - Test"
Table 1
Troubleshooting Test Steps Values Results
1. Diagnostic Codes, Event Codes, and Electrical Power Supply to the ECM
A. Certain diagnostic codes and/or event codes may prevent the engine from starting. Connect Caterpillar Electronic Technician (ET) and check for active codes and/or for logged codes. Troubleshoot any codes that are present before continuing with this procedure.
Upon initial cranking, the status for engine speed may indicate that the engine speed signal is abnormal. This message will be replaced with an engine speed once the ECM is able to calculate a speed from the signal.
Codes
Result: No codes are active or logged.
Proceed to Test Step 2.
Result: Codes are active or logged.
Use the appropriate circuit test to troubleshoot any active diagnostic codes before continuing with this procedure.
2. Engine Shutdown Switches (If Applicable)
A. The engine shutdown switches must be in the OFF position.
B. Use Cat ET to verify the status of the engine shutdown switches. When a shutdown occurs, the keyswitch must be turned to the OFF position for at least 15 seconds before restarting the engine.
Shutdown switches
Result: The switches are in the OFF position.
Proceed to Test Step 3.
Result: The switches are not in the OFF position.
Turn the switches to the OFF position.
3. Engine Speed/Timing
A. Crank the engine and observe the engine speed on the Cat ET status screen. If Cat ET indicates 0 rpm, refer to Troubleshooting, "Speed/Timing - Test"
Timing signal
Result: The timing sensor is operating properly.
Proceed to Test Step 4.
Result: The timing sensor is not operating properly.
Refer to Troubleshooting, "Speed/Timing - Test" for troubleshooting information.
4. Low Pressure Fuel System
A. Inspect the fuel system. Refer to Systems Operation/ Testing and Adjusting, "Fuel System" for additional information.
B. Check the filtered fuel pressure while the engine is being cranked. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for the test procedure and for the correct pressure values.
C. Check for the proper operation of the fuel transfer pump. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for test information.
Fuel system
Result: The fuel system pressure is OK.
Proceed to Test Step 5.
Result: The fuel system pressure is NOT OK.
If the fuel pressure is low, replace the fuel filters. Clean the primary filter/water separator of debris. Refer to the Operation and Maintenance Manual for details.
Continue with this procedure, if the problem is not resolved.
5. Unit Injectors
A. Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM. Refer to Troubleshooting, "Injector Solenoid - Test" for additional information.
Injectors
Result: The unit injectors are operating properly.
Proceed to Test Step 6.
Result: The unit injectors are NOT operating properly.
Isolate the misfiring injector. Make the necessary repairs. Verify that the problem is resolved.
6. Fuel Quality
A. Obtain a fuel analysis.
Cold weather adversely