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P-300: Engine Will Not Crank
This is NOT a PEEC III system problem. Probable root causes:* Batteries* Starting circuit problem (in vehicle wiring)* Starter solenoid* Starter motor* Starter ring gear* Transmission or Power Take-Off problem* Hydraulic cylinder lock* Internal engine problemPerform the following tests in order: For details of tests below, refer to 3406B PEEC Diesel Truck Engine, Systems Operation Testing and Adjusting, Form No. SENR5146.1. Charge batteries (see Special Instruction Form No. SEHS7633, for Battery Test Procedure).2. Load test batteries (see Special Instruction Form No. SEHS9249, for Use Of 4C4911 Battery Load Tester).3. Check vehicle wiring to starter solenoid (see vehicle manufacturers instructions).4. Inspect starter cables for damage or loose connections.5. Remove and clean starter cables and connections if corroded.6. Test starter solenoid operation. Use 3406B Diesel Engine, Systems Operation Testing and Adjusting Form No. SENR5146.7. Test starter motor operation. Use 3406B Diesel engine, Systems Operation Testing and Adjusting Form No. SENR5146.8. Remove and inspect starter ring gear for damage.9. Check for fluid in cylinders by removing individual nozzles.10. If engine will not turn over by hand, disconnect transmission and check for damage.11. Disassemble engine to inspect internal components (only as a last resort).P-301: Engine Cranks But Will Not Start
Probable root causes:* Electrical power supply to ECM* Fuel supply* Shutoff solenoid* Engine Speed Signal* Rack controls* Combustion problemPerform the following tests in order:1. P-501: Electrical Power Supply Test2. Check fuel supply for: * Air in fuel* Plugged fuel supply or return lines* Congealed fuel (wax) in temperatures below 0° C (32° F)3. P-513: Shutoff Solenoid Test4. P-512: Engine Speed Signal Test5. P-522: Rack Solenoid (BTM) Test6. P-521: Rack Position Sensor Test7. Check for combustion problems (too cold or mechanical problem).P-302: Engine Starts But Stalls Immediately
Probable root causes:* Shutoff solenoid* Electrical power to PEEC III* Fuel supply* Rack controls* Engine speed signalPerform the following tests in order:1. P-513: Shutoff Solenoid Test2. P-501: Electrical Power Supply Test3. Check fuel supply for: * Air in fuel* Plugged fuel supply or return lines* Congealed fuel (wax) in temperatures below 0° C (32° F)4. P-522: Rack Solenoid (BTM) Test5. P-521: Rack Position Sensor Test6. P-512: Engine Speed Signal TestP-303: Erractic Or Unstable RPM
Probable root causes:* Rack controls* Throttle position signal* Engine speed signal* Fuel supply* Vehicle speed signal* Timing advance controlsPerform the following tests in order:1. P-522: Rack Solenoid (BTM) Test2. P-521: Rack Position Sensor Test3. P-502: Throttle Position Sensor Test4. P-512: Engine Speed Signal Test5. Check fuel supply for: * Plugged fuel filter* Water in fuel* Poor fuel quality* Air in fuel* Severe fuel return restriction6. P-504: Vehicle Speed Signal Test7. P-532: Timing Solenoid (BTM) Test8. P-531: Timing Position Sensor TestP-304: Engine Misfires Or Runs Rough
Probable root causes:* Leaking fuel line* Valve lash* Fuel injection nozzle* Fuel injection pump* Cylinder problem* Intake or exhaust restriction* Fuel supply* Unstable rack motionPerform the following tests in order:1. Inspect and repair any fuel leaks.2. Loosen fuel line nuts one at a time to isolate the misfiring cylinder.3. If misfiring cylinder can be isolated: * Check valve lash on misfiring cylinder.* Test injection nozzle on misfiring cylinder.* Check injection pump (plunger and barrel) on misfiring cylinder.* Inspect inside of misfiring cylinder for damage.4. If misfiring cylinder cannot be isolated: * Check for intake and exhaust system restrictions.* Check fuel pressure.* Check fuel quality (also air or water in fuel).* Check for popping sounds in air intake (adjust valve lash if sounds are heard).* Check for unstable rack motion (refer to P-303: Erractic or Unstable RPM).P-305: No Or Poor Response To Throttle
Probable root causes:* Active Diagnostic Codes* PEEC III Self-Checks or Cold Mode (normal operation)* Progressive Shift Parameters (normal operation)* Throttle position signal* Rack subsystem* Vehicle speed signalPerform the following tests in order:1. Troubleshoot any ACTIVE diagnostic codes.2. Verify that PEEC III has completed its startup self-checks and is out of cold mode.3. Check Progressive Shift Parameters to verify that they are not the cause of the complaint.4. P-502: Throttle Position Sensor Test5. P-521: Rack Position Sensor Test6. P-523: Rack Solenoid (BTM) Test7. P-504: Vehicle Speed Signal TestP-306: Low Power/Engine RPM Restricted/Will Not Reach VSL
Probable root causes:* Active Diagnostic Codes* Customer Parameters (normal operation)* PEEC III Self-Checks or Cold Mode (normal operation)* Throttle position signal* Fuel supply restrictions* Inlet air system problems* Exhaust system restrictions* Boost pressure signals* Rack controls* Timing advance* Vehicle speed signalPerform the following tests in order:1. Troubleshoot any ACTIVE or LOGGED diagnostic codes. * Code 24, 46, and 48 limit engine speed to 1350 rpm.* Code 36 limits engine speed to "Engine RPM At VSL".* Codes 22, 23, 25, 43, 44 limit engine power.2. Verify that the complaint is NOT due to parameters. * Check Progressive Shift Parameters, Vehicle Speed Limit, and Top Engine Limit.* Verify that Full Load Setting and Full Torque Setting are programmed to the values stamped on the engine information plate.3. Verify that PEEC III has completed its startup self-checks and is out of cold mode.4. P-502: Throttle Position Sensor Test5. Check for proper fuel pressure/fuel return flow.6. Check for air system problems: * Plugged air filter* Aftercooler restrictions* Aftercooler leaks* High intake air temperature7. Check for exhaust system restrictions8. P-514: Boost Pressure Sensor Test9. P-520: Dynamic Rack Controls Test10. P-533: Dynamic Injection Timing Test11. P-504: Vehicle Speed Signal TestP-307: Cruise Or PTO Does Not Function
Probable root causes:* Active Diagnostic Codes* Customer Parameters (normal operation)* Cruise/PTO Switches* Vehicle speed signalPerform the following tests in order:1. Troubleshoot any ACTIVE diagnostic codes.2. Check High/Low Cruise Limit and Vehicle Speed Calibration.3. P-505: Cruise Control and PTO Switches Test4. P-506: Service Brake and Clutch Switches Test5. P-504: Vehicle Speed Signal TestP-308: Intermittent Engine Shutdowns
Use this procedure ONLY if the engine shut down completely and had to be restarted using the keyswitch. Probable root causes:* Poor connection* Battery power or ground to ECM (vehicle wiring)* After Market engine protection devices (PEEC III does not have engine protection shutdown feature)* Fuel supply* Shutoff solenoid* Shorted 8 volt sensor supply voltage* Rack controls* Engine speed sensor* ECM or Personality ModulePerform the following steps in order:1. Check