PIPE 4885701 - Caterpillar

Table 1
Associated Diagnostic Trouble Codes
157-17
5580-18
5584-15
5584-16 Probable Causes
Codes
Parameters
Throttle Signal
Inlet air restriction
Exhaust restriction
Fuel System
Engine Load
Valve LashRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are high engine speed, full load, and engine operating temperature. Troubleshooting the symptoms under other conditions can give misleading results.
Table 2
Troubleshooting Test Steps Values Results
1. Engine Derate or Active Codes
A. Certain diagnostic codes and/or event codes may cause poor performance. Refer to the histogram information for engine derates in Cat ET. Check for the following histograms:
1. High Exhaust Temperature Prevention Derate Time Histogram
2. High Turbo Speed Prevention Derate Time Histogram
B. If the histograms contain derates and no diagnostic codes are present, then the engine is operating normally. The following list contains conditions that can cause derates:
1. Elevated altitude
2. Elevated inlet air temperature
3. Elevated ambient temperature
Engine Derate or Active Codes Result: A diagnostic code is present.
Repair: Troubleshoot the code and then reset the histogram.
Result: A diagnostic code is not present.
Proceed to Test Step 2.
2. Check for Incorrect Configuration Parameters
A. Connect Cat ET to the service tool connector. verify that the correct parameters are being used.
B. Use Cat ET to verify that the correct parameters are being used.
Parameters Result: The parameters are correct.
Proceed to Test Step 3.
Result: The parameters are not correct.
Repair: Input the correct parameters. Refer to Troubleshooting, "Configuration Parameters" for additional information.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Throttle Signal
A. Monitor the status for "Throttle Position" on Cat ET. Verify that the status for "Throttle Position" is stable and that the engine is able to reach high idle speed.
Throttle Signal Result: The throttle signal is stable.
Proceed to Test Step 4.
Result: The throttle signal is not stable.
Repair: Make the necessary repairs, Refer to the appropriate circuit test.
If the problem is not resolved, proceed to Test Step 4.
4. Check for Restriction in the Air Inlet System
A. Check for an air filter restriction indicator. Refer to the Operation and Maintenance Manual for additional information.
B. Measure the inlet air restriction for the turbocharger. Refer to Troubleshooting, "Inlet Air Is Restricted" for additional information.
Restrictions Result: The inlet air restriction is OK.
Proceed to Test Step 5.
Result: The inlet air restriction is NOT OK. An imbalance in the system is discovered.
Repair: Repair or replace damaged inlet air system components. Equalize the inlet air restriction for the turbocharger.
If the problem is not resolved, proceed to Test Step 5.
5. Check for a Restriction in the Exhaust System
A. Measure the exhaust restriction during engine operation with a load. For data that is specific to your engine, refer to the Technical Marketing Information (TMI).
Restrictions Result: The exhaust restriction measurement is OK.
Proceed to Test Step 6.
Result: The exhaust restrictions not OK.
Repair: Repair or replace damaged exhaust system components.
If the problem is not resolved, proceed to Test Step 6.
6. Inspect the Fuel System
Refer to Systems Operation/Testing and Adjusting, "Fuel System Inspection" for additional information.
A. Visually check the fuel