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P-104: Low Power/Poor Or No Response To Throttle
Probable root causes:
* Active diagnostic codes* Customer Specified Parameters (normal operation)* Throttle position signal* Boost pressure signal* Vehicle speed signal* Fuel supply* Air inlet or exhaust restrictions* Inlet air system leaksPerform the following tests in order:1. Troubleshoot any ACTIVE diagnostic codes.* Codes 31 or 36 limit engine speed to rpm at VSL* Codes 25 or 42 limit power or rpm or both* Code 32 limits engine speed to low idle* Code 56 may limit engine speed to low idle, depending on which parameter caused the code to be generated2. Verify that complaint is not normal (programmed parameter) operation.* Check vehicle speed limit, progressive shift parameters etc.3. Verify that engine has shifted out of Cold Mode4. P-211: Throttle Position Sensor Test4. P-225: Boost Pressure Sensor Test5. P-213: Vehicle Speed Signal Test6. Inspect fuel system components and check for correct fuel pressure.7. Check the air inlet and exhaust systems for restrictions, refer to 3176 Diesel Truck Engine, Form SENR4248, Mechanical Troubleshooting.8. Run PAR (Performance Analysis Report) TestP-105: Cruise Or PTO Does Not Function
Probable root causes:
* Active Diagnostic Codes* Customer Specified Parameters (normal operation)* Cruise/PTO Switches* Vehicle speed signalPerform the following tests in order:1. Troubleshoot any ACTIVE diagnostic codes.2. Check Customer Specified Parameters* High Cruise Limit and Low Cruise Limit* PTO Mode speed limit3. P-214: Cruise Control and PTO Switches Test4. P-215: Service Brake and Clutch Switches Test5. P-213: Vehicle Speed Signal TestP-110: Intermittent Engine Shutdowns
Use this procedure ONLY if the engine has shut down completely and had to be restarted using the key switch.Probable root causes:
* Battery power or ground to ECM (vehicle wiring).* Aftermarket engine protection devices [the 2YG (S/N) prefix 3176 Diesel Truck Engine does NOT have its own engine protection shutdown feature].* 3176 Engine wiring harness* Fuel supply* Engine Speed/Timing Sensor* ECM or Personality ModulePerform the following tests in order:1. Check external 3176 Harness and connectors (refer to P-201: Inspecting Electrical Connectors.2. Check for correct installation and operation of engine protection devices.3. Check for correct installation of J4/P4 (40 Pin-ECM connector).4. P-210: Electrical Power Supply Test.5. Check fuel lines for restrictions and fuel tanks for foreign objects which may block fuel supply.6. P-221: Engine Speed/Timing Sensor Test.7. P-220: ECM and Personality Module Test.P-111: Intermittent Low Power Or Power Cutouts
Use this procedure only if engine DOES NOT completely shut down (that is, it did NOT need to be restarted using the key switch).Probable root causes:
* Poor electrical connections* Battery power or ground to ECM (vehicle wiring)* Vehicle speed signal* Engine Speed/Timing Sensor* Fuel supply* Throttle Position Sensor* Cruise control switches* Service Brake and Clutch SwitchesPerform the following tests in order:1. Check external 3176 Harness and connectors (refer to P-201: Inspecting Electrical Connectors).2. P-210: Electrical Power Supply Test3. P-213: Vehicle Speed Signal Test4. P-221: Engine Speed/Timing Sensor Test5. Check fuel lines for restrictions and fuel tanks for foreign objects which may block fuel supply.6. P-211: Throttle Position Sensor Test.7. P-214: Cruise Control and PTO Switches Test.8. P-215: Service Brake and Clutch Switches