Turbocharger Differential Speed Problem
Use this procedure to troubleshoot a high turbocharger differential speed. Also, use this procedure if one of the following event codes is active or logged.
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| J1939 Code and Description | Comments |
|---|---|
| 5980-0
Engine Turbocharger Differential Speed : High - most severe (3) |
The engine is shutdown.
The code is logged. |
| 5980-15
Engine Turbocharger Differential Speed : High - least severe (1) |
The code is logged. |
| 5980-16
Engine Turbocharger Differential Speed : High - moderate severity (2) |
Engine power is derated.
The code is logged. |
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| Associated Codes | ||
|---|---|---|
| J1939 Code | CDL Code | Troubleshooting Procedure |
| 103-8 | 1672-8 | Troubleshooting, "Turbocharger Turbine Speed Is High" |
| 1169-8 | 1671-8 | Troubleshooting, "Turbocharger Turbine Speed Is High" |
| 651-5 | 1-5 | Troubleshooting, "Injector Solenoid - Test" |
| 651-6 | 1-6 | Troubleshooting, "Injector Solenoid - Test" |
| 652-5 | 2-5 | Troubleshooting, "Injector Solenoid - Test" |
| 652-6 | 2-6 | Troubleshooting, "Injector Solenoid - Test" |
| 653-5 | 3-5 | Troubleshooting, "Injector Solenoid - Test" |
| 653-6 | 3-6 | Troubleshooting, "Injector Solenoid - Test" |
| 654-5 | 4-5 | Troubleshooting, "Injector Solenoid - Test" |
| 654-6 | 4-6 | Troubleshooting, "Injector Solenoid - Test" |
| 655-5 | 5-5 | Troubleshooting, "Injector Solenoid - Test" |
| 655-6 | 5-6 | Troubleshooting, "Injector Solenoid - Test" |
| 656-5 | 6-5 | Troubleshooting, "Injector Solenoid - Test" |
| 656-6 | 6-6 | Troubleshooting, "Injector Solenoid - Test" |
| 657-5 | 7-5 | Troubleshooting, "Injector Solenoid - Test" |
| 657-6 | 7-6 | Troubleshooting, "Injector Solenoid - Test" |
| 658-5 | 8-5 | Troubleshooting, "Injector Solenoid - Test" |
| 658-6 | 8-6 | Troubleshooting, "Injector Solenoid - Test" |
| 659-5 | 9-5 | Troubleshooting, "Injector Solenoid - Test" |
| 659-6 | 9-6 | Troubleshooting, "Injector Solenoid - Test" |
| 660-5 | 10-5 | Troubleshooting, "Injector Solenoid - Test" |
| 660-6 | 10-6 | Troubleshooting, "Injector Solenoid - Test" |
| 661-5 | 11-5 | Troubleshooting, "Injector Solenoid - Test" |
| 661-6 | 11-6 | Troubleshooting, "Injector Solenoid - Test" |
| 662-5 | 12-5 | Troubleshooting, "Injector Solenoid - Test" |
| 662-6 | 12-6 | Troubleshooting, "Injector Solenoid - Test" |
| 663-5 | 13-5 | Troubleshooting, "Injector Solenoid - Test" |
| 663-6 | 13-6 | Troubleshooting, "Injector Solenoid - Test" |
| 664-5 | 14-5 | Troubleshooting, "Injector Solenoid - Test" |
| 664-6 | 14-6 | Troubleshooting, "Injector Solenoid - Test" |
| 665-5 | 15-5 | Troubleshooting, "Injector Solenoid - Test" |
| 665-5 | 15-6 | Troubleshooting, "Injector Solenoid - Test" |
| 666-6 | 16-5 | Troubleshooting, "Injector Solenoid - Test" |
| 666-6 | 16-6 | Troubleshooting, "Injector Solenoid - Test" |
- Codes
- Inlet air restriction
- Exhaust restriction
- Fuel injectors
- Turbocharger
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| 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: A code is active or logged. Proceed to Test Step 2. |
2. Check for a Restriction in the Inlet Air System A. Check the air filter restriction indicator, if equipped. Refer to the Operation and Maintenance Manual for additional information. B. Measure the inlet air restriction for each turbocharger. Refer to Troubleshooting, "Inlet Air Is Restricted" for additional information. |
Restriction |
Result: The inlet air restriction is OK. Proceed to Test Step 3. 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 each of the turbochargers. If the problem is not resolved, proceed to Test Step 3. |
3. Check for a Restriction in the Exhaust System Note: A restriction of the exhaust can cause high cylinder temperatures. 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). |
Restriction |
Result: The exhaust restriction measurement is OK. Proceed to Test Step 4. Result: The exhaust restriction measurement is NOT OK. Repair: Repair or replace damaged exhaust system components. If the problem is not resolved, proceed to Test Step 4. |
4. Test the Fuel Injectors A. Connect Cat ET. B. Use Cat ET to perform the following fuel injector tests: - "Injector Solenoid Test" - "Cylinder Cutout Test" Refer to Troubleshooting, "Cat ET Service Features" for additional information. |
Fuel Injectors |
Result: The tests were successful. Proceed to Test Step 5. Result: The tests were not successful. Repair: Diagnose the problem. Repair or replace damaged components. If the problem is not resolved, proceed to Test Step 5. |
5. Check for Proper Operation of the Turbocharger A. Check for any oil that may be leaking into the inlet air. |
Turbocharger |
Result: The turbocharger is leaking oil into the inlet air. Repair: Repair or replace damaged turbocharger. Verify that the repair eliminated the problem. |
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
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