Diagnostic codes alert the operator that a problem in the electronic system has been detected. Diagnostic codes are also used by the service technician to identify the nature of the problem. The technician must have access to a diagnostic tool in order to read diagnostic information.
The following Module Identifiers (MID) are used to identify the control modules that are associated with engine operation:
- MID No. 036 is used to identify the engine Electronic Control Module (ECM)
- MID No. 094 is used to identify the Temperature Control Module (TCM)
Tables1 and 1 lists the diagnostic codes that apply to the engine ECM.
Table 1 lists the diagnostic codes that apply to the TCM for the engine cooling system.
Use Caterpillar Electronic Technician (ET) in order to determine the diagnostic codes that are active or logged. Then refer to the appropriate troubleshooting procedure for more information.
Note: Do not confuse diagnostic codes with event codes. Event codes alert the operator that an abnormal operating condition such as low oil pressure or high coolant temperature has been detected. If an event code is active, refer to Troubleshooting, "Event Codes".
Diagnostic information is transmitted over data links. This engine uses the following two types of data links for communication. The data links are described below:
The Cat Data Link is used by the engine ECM to communicate with Caterpillar controllers or display modules. Cat ET is a software program that is designed to run on a personal computer. The software can be used by the service technician in order to view the diagnostic code information that is generated by the engine ECM. The diagnostic code is displayed as a two-element code. The following terms describe the elements of the code:
Component Identifier (CID) - The CID indicates the component that generated the code.
Failure Mode Identifier (FMI) - The FMI indicates the type of failure.
The CAN data link is used by the engine ECM to communicate with aftermarket controllers or display modules. The CAN data link is referred to as the J1939 data link. When a diagnostic code is activated, the ECM can transmit information about the diagnostic code over the J1939 data link to aftermarket controllers. The diagnostic code will be displayed as a two-element code. The following terms describe the elements of the code:
Suspect Parameter Number (SPN) - The SPN is a code which is assigned to each component in order to identify data via the data link to the ECM.
Failure Mode Identifier (FMI) - The FMI indicates the type of failure.
Refer to Table 1 for a complete list of the diagnostic codes and the appropriate troubleshooting procedures. Further explanations of diagnostic codes are explained after Table 1.
Cross-Reference Information for Diagnostic Codes that are Generated by the Engine ECM
Table 1 is a list of the diagnostic codes that are generated by the engine ECM. The diagnostic codes are cross-referenced with the appropriate procedure that can be used to troubleshoot the code.
Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Please contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.
SPN-FMI Code to CID-FMI Code to the Appropriate Test Procedure
Cross-Reference from SPN-FMI Code to CID-FMI Code to the Appropriate Circuit Test
MID No. 036 |
||
---|---|---|
SPN-FMI Code and Description | Diagnostic Code and Description | Troubleshooting Procedure |
52-3 Engine Intercooler Temperature : Voltage Above Normal | 279-3 Aftercooler Coolant Temperature Sensor (Front) : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
52-4 Engine Intercooler Temperature : Voltage Below Normal | 279-4 Aftercooler Coolant Temperature Sensor (Front) : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
91-8 Accelerator Pedal Position 1 : Abnormal Frequency, Pulse Width, or Period | 91-8 Throttle Position Sensor : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Speed Control - Test" |
99-2 Engine Oil Filter Differential Pressure : Erratic, Intermittent, or Incorrect | 99-2 Engine Oil Filter Differential Pressure Sensor : Erratic, Intermittent, or Incorrect | The filtered oil pressure is greater than the unfiltered oil pressure. Ensure that the sensor connectors are connected to the correct sensors. If an electrical problem with a sensor is suspected, refer to Troubleshooting, "Sensor Signal (Analog, Active) - Test" for information that is related to troubleshooting an electrical problem with the oil pressure sensors. |
100-3 Engine Oil Pressure : Voltage Above Normal | 100-3 Engine Oil Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
100-4 Engine Oil Pressure : Voltage Below Normal | 100-4 Engine Oil Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
101-3 Engine Crankcase Pressure : Voltage Above Normal | 101-3 Crankcase Air Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
101-4 Engine Crankcase Pressure : Voltage Below Normal | 101-4 Crankcase Air Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
105-3 Engine Intake Manifold 1 Temperature : Voltage Above Normal | 172-3 Intake Manifold Air Temperature Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
105-4 Engine Intake Manifold 1 Temperature : Voltage Below Normal | 172-4 Intake Manifold Air Temperature Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
108-3 Barometric Pressure : Voltage Above Normal | 274-3 Atmospheric Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
108-4 Barometric Pressure : Voltage Below Normal | 274-4 Atmospheric Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
109-3 Engine Coolant Pressure : Voltage Above Normal | 2303-3 Engine Block Coolant Outlet Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
110-3 Engine Coolant Temperature : Voltage Above Normal | 110-3 Engine Coolant Temperature Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
110-4 Engine Coolant Temperature : Voltage Below Normal | 110-4 Engine Coolant Temperature Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
111-17Engine Coolant Level : Low - least severe (1) | E2143 (1)Low Engine Coolant Level | Troubleshooting, "Coolant Level is Low - Test" |
111-18Engine Coolant Level : Low - moderate severity (2) | E2143 (2)Low Engine Coolant Level | Troubleshooting, "Coolant Level is Low - Test" |
168-0 Battery Potential / Power Input 1 : High - most severe (3) | 168-0 Electrical System Voltage : High | Troubleshooting, "Electrical Power Supply - Test" |
168-1 Battery Potential / Power Input 1 : Low - most severe (3) | 168-1 Electrical System Voltage : Low | Troubleshooting, "Electrical Power Supply - Test" |
168-2 Battery Potential / Power Input 1 : Erratic, Intermittent, or Incorrect | 168-2 Electrical System Voltage : Erratic, Intermittent, or Incorrect | Troubleshooting, "Electrical Power Supply - Test" |
175-3 Engine Oil Temperature 1 : Voltage Above Normal | 175-3 Engine Oil Temperature Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
175-4 Engine Oil Temperature 1 : Voltage Below Normal | 175-4 Engine Oil Temperature Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
190-8 Engine Speed : Abnormal Frequency, Pulse Width, or Period | 190-8 Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Speed/Timing - Test" |
631-2 Calibration Module : Erratic, Intermittent, or Incorrect | 253-2 Personality Module : Erratic, Intermittent, or Incorrect | Troubleshooting, "ECM Software - Install" |
639-9 J1939 Network #1 : Abnormal Update Rate | 247-9 SAE J1939 Data Link : Abnormal Update Rate | Troubleshooting, "Data Link - Test" |
651-2 Engine Injector Cylinder #01 : Erratic, Intermittent, or Incorrect | 1-2 Cylinder #1 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
651-5 Engine Injector Cylinder #01 : Current Below Normal | 1-5 Cylinder #1 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
651-6 Engine Injector Cylinder #01 : Current Above Normal | 1-6 Cylinder #1 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
651-7 Engine Injector Cylinder #01 : Not Responding Properly | 1-7 Cylinder #1 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
652-2 Engine Injector Cylinder #02 : Erratic, Intermittent, or Inc | 2-2 Cylinder #2 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
652-5 Engine Injector Cylinder #02 : Current Below Normal | 2-5 Cylinder #2 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
652-6 Engine Injector Cylinder #02 : Current Above Normal | 2-6 Cylinder #2 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
652-7 Engine Injector Cylinder #02 : Not Responding Properly | 2-7 Cylinder #2 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
653-2 Engine Injector Cylinder #03 : Erratic, Intermittent, or Incorrect | 3-2 Cylinder #3 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
653-5 Engine Injector Cylinder #03 : Current Below Normal | 3-5 Cylinder #3 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
653-6 Engine Injector Cylinder #03 : Current Above Normal | 3-6 Cylinder #3 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
653-7 Engine Injector Cylinder #03 : Not Responding Properly | 3-7 Cylinder #3 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
654-2 Engine Injector Cylinder #04 : Erratic, Intermittent, or Incorrect | 4-2 Cylinder #4 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
654-5 Engine Injector Cylinder #04 : Current Below Normal | 4-5 Cylinder #4 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
654-6 Engine Injector Cylinder #04 : Current Above Normal | 4-6 Cylinder #4 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
654-7 Engine Injector Cylinder #04 : Not Responding Properly | 4-7 Cylinder #4 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
655-2 Engine Injector Cylinder #05 : Erratic, Intermittent, or Incorrect | 5-2 Cylinder #5 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
655-5 Engine Injector Cylinder #05 : Current Below Normal | 5-5 Cylinder #5 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
655-6 Engine Injector Cylinder #05 : Current Above Normal | 5-6 Cylinder #5 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
655-7 Engine Injector Cylinder #05 : Not Responding Properly | 5-7 Cylinder #5 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
656-2 Engine Injector Cylinder #06 : Erratic, Intermittent, or Incorrect | 6-2 Cylinder #6 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
656-5 Engine Injector Cylinder #06 : Current Below Normal | 6-5 Cylinder #6 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
656-6 Engine Injector Cylinder #06 : Current Above Normal | 6-6 Cylinder #6 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
656-7 Engine Injector Cylinder #06 : Not Responding Properly | 6-7 Cylinder #6 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
657-2 Engine Injector Cylinder #07 : Erratic, Intermittent, or Incorrect | 7-2 Cylinder #7 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
657-5 Engine Injector Cylinder #07 : Current Below Normal | 7-5 Cylinder #7 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
657-6 Engine Injector Cylinder #07 : Current Above Normal | 7-6 Cylinder #7 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
657-7 Engine Injector Cylinder #07 : Not Responding Properly | 7-7 Cylinder #7 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
658-2 Engine Injector Cylinder #08 : Erratic, Intermittent, or Incorrect | 8-2 Cylinder #8 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
658-5 Engine Injector Cylinder #08 : Current Below Normal | 8-5 Cylinder #8 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
658-6 Engine Injector Cylinder #08 : Current Above Normal | 8-6 Cylinder #8 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
658-7 Engine Injector Cylinder #08 : Not Responding Properly | 8-7 Cylinder #8 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
659-2 Engine Injector Cylinder #09 : Erratic, Intermittent, or Incorrect | 9-2 Cylinder #9 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
659-5 Engine Injector Cylinder #09 : Current Below Normal | 9-5 Cylinder #9 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
659-6 Engine Injector Cylinder #09 : Current Above Normal | 9-6 Cylinder #9 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
659-7 Engine Injector Cylinder #09 : Not Responding Properly | 9-7 Cylinder #9 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
660-2 Engine Injector Cylinder #10 : Erratic, Intermittent, or Incorrect | 10-2 Cylinder #10 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
660-5 Engine Injector Cylinder #10 : Current Below Normal | 10-5 Cylinder #10 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
660-6 Engine Injector Cylinder #10 : Current Above Normal | 10-6 Cylinder #10 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
660-7 Engine Injector Cylinder #10 : Not Responding Properly | 10-7 Cylinder #10 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
661-2 Engine Injector Cylinder #11 : Erratic, Intermittent, or Incorrect | 11-2 Cylinder #11 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
661-5 Engine Injector Cylinder #11 : Current Below Normal | 11-5 Cylinder #11 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
661-6 Engine Injector Cylinder #11 : Current Above Normal | 11-6 Cylinder #11 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
661-7 Engine Injector Cylinder #11 : Not Responding Properly | 11-7 Cylinder #11 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
662-2 Engine Injector Cylinder #12 : Erratic, Intermittent, or Incorrect | 12-2 Cylinder #12 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
662-5 Engine Injector Cylinder #12 : Current Below Normal | 12-5 Cylinder #12 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
662-6 Engine Injector Cylinder #12 : Current Above Normal | 12-6 Cylinder #12 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
662-7 Engine Injector Cylinder #12 : Not Responding Properly | 12-7 Cylinder #12 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
663-2 Engine Injector Cylinder #13 : Erratic, Intermittent, or Incorrect | 13-2 Cylinder #13 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
663-5 Engine Injector Cylinder #13 : Current Below Normal | 13-5 Cylinder #13 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
663-6 Engine Injector Cylinder #13 : Current Above Normal | 13-6 Cylinder #13 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
663-7 Engine Injector Cylinder #13 : Not Responding Properly | 13-7 Cylinder #13 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
664-2 Engine Injector Cylinder #14 : Erratic, Intermittent, or Incorrect | 14-2 Cylinder #14 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
664-5 Engine Injector Cylinder #14 : Current Below Normal | 14-5 Cylinder #14 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
664-6 Engine Injector Cylinder #14 : Current Above Normal | 14-6 Cylinder #14 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
664-7 Engine Injector Cylinder #14 : Not Responding Properly | 14-7 Cylinder #14 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
665-2 Engine Injector Cylinder #15 : Erratic, Intermittent, or Incorrect | 15-2 Cylinder #15 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
665-5 Engine Injector Cylinder #15 : Current Below Normal | 15-5 Cylinder #15 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
665-6 Engine Injector Cylinder #15 : Current Above Normal | 15-6 Cylinder #15 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
665-7 Engine Injector Cylinder #15 : Not Responding Properly | 15-7 Cylinder #15 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
666-2 Engine Injector Cylinder #16 : Erratic, Intermittent, or Incorrect | 16-2 Cylinder #16 Injector : Erratic, Intermittent, or Incorrect | Troubleshooting, "Injector Solenoid - Test" |
666-5 Engine Injector Cylinder #16 : Current Below Normal | 16-5 Cylinder #16 Injector : Current Below Normal | Troubleshooting, "Injector Solenoid - Test" |
666-6 Engine Injector Cylinder #16 : Current Above Normal | 16-6 Cylinder #16 Injector : Current Above Normal | Troubleshooting, "Injector Solenoid - Test" |
666-7 Engine Injector Cylinder #16 : Not Responding Properly | 16-7 Cylinder #16 Injector : Not Responding Properly | Troubleshooting, "Injector Solenoid - Test" |
677-5 Engine Starter Motor Relay : Current Below Normal | 2727-5 Starting System #1 Relay : Current Below Normal | Troubleshooting, "Starting - Test" |
2728-5 Starting System #2 Relay : Current Below Normal | Troubleshooting, "Starting - Test" | |
677-6 Engine Starter Motor Relay : Current Above Normal | 2727-6 Starting System #1 Relay : Current Above Normal | Troubleshooting, "Starting - Test" |
2728-6 Starting System #2 Relay : Current Above Normal | Troubleshooting, "Starting - Test" | |
678-3 ECU 8 Volts DC Supply : Voltage Above Normal | 41-3 8 Volt DC Supply : Voltage Above Normal | Troubleshooting, "Sensor Supply - Test" |
678-4 ECU 8 Volts DC Supply : Voltage Below Normal | 41-4 8 Volt DC Supply : Voltage Below Normal | Troubleshooting, "Sensor Supply - Test" |
723-8 Engine Speed Sensor #2 : Abnormal Frequency, Pulse Width, or Period | 342-8 Secondary Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Speed/Timing - Test" |
723-11 Engine Speed Sensor #2 : Other Failure Mode | 342-11 Secondary Engine Speed Sensor : Other Failure Mode | Troubleshooting, "Speed/Timing - Test" |
1176-3 Engine Turbocharger 1 Compressor Inlet Pressure : Voltage Above Norm | 2738-3 Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1176-4 Engine Turbocharger 1 Compressor Inlet Pressure : Voltage Below Normal | 2738-4 Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1177-3 Engine Turbocharger 2 Compressor Inlet Pressure : Voltage Above Normal | 2739-3 Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1177-4 Engine Turbocharger 2 Compressor Inlet Pressure : Voltage Below Normal | 2739-4 Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1180-3 Engine Turbocharger 1 Turbine Inlet Temperature : Voltage Above Normal | 1492-3 Left Turbo Turbine Inlet Temperature Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (PWM) - Test" |
1180-4 Engine Turbocharger 1 Turbine Inlet Temperature : Voltage Below Normal | 1492-4 Left Turbo Turbine Inlet Temperature Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (PWM) - Test" |
1180-8 Engine Turbocharger 1 Turbine Inlet Temperature : Abnormal Frequency, Pulse Width, or Period | 1492-8 Left Turbo Turbine Inlet Temperature Sensor : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Sensor Signal (PWM) - Test" |
1181-3 Engine Turbocharger 2 Turbine Inlet Temperature : Voltage Above Normal | 1491-3 Right Turbo Turbine Inlet Temperature Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (PWM) - Test" |
1181-4 Engine Turbocharger 2 Turbine Inlet Temperature : Voltage Below Normal | 1491-4 Right Turbo Turbine Inlet Temperature Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (PWM) - Test" |
1181-8 Engine Turbocharger 2 Turbine Inlet Temperature : Abnormal Frequency, Pulse Width, or Period | 1491-8 Right Turbo Turbine Inlet Temperature Sensor : Abnormal Frequency, Pulse Width, or Period | Troubleshooting, "Sensor Signal (PWM) - Test" |
1203-3 Engine Auxiliary Coolant Pressure : Voltage Above Normal | 2301-3 Aftercooler Coolant Pump Outlet Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1203-4 Engine Auxiliary Coolant Pressure : Voltage Below Normal | 2301-4 Aftercooler Coolant Pump Outlet Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1208-3 Engine Pre-filter Oil Pressure : Voltage Above Normal | 542-3 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1208-4 Engine Pre-filter Oil Pressure : Voltage Below Normal | 542-4 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1208-10 Engine Percent Torque At Point 4 : Abnormal Rate of Change | 542-10 Engine Oil Pressure Sensor - Before Oil Filter : Abnormal Rate of Change | Troubleshooting, "Sensor Supply - Test" |
1382-3 Engine Fuel Filter (suction side) Differential Pressure : Voltage Above Normal | 3418-3 Fuel Filter (suction side) Differential Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
1382-4 Engine Fuel Filter (suction side) Differential Pressure : Voltage Below Normal | 3418-4 Fuel Filter (suction side) Differential Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
3509-3Sensor Supply Voltage 1 : Voltage Above Normal | 262-35 Volt Sensor DC Power Supply : Voltage Above Normal | Troubleshooting, "Sensor Supply ( - Test" |
3509-4Sensor Supply Voltage 1 : Voltage Below Normal | 262-45 Volt Sensor DC Power Supply : Voltage Below Normal | Troubleshooting, "Sensor Supply - Test" |
3510-3 Sensor Supply Voltage 2 : Voltage Above Normal | 2131-3 5 Volt Sensor DC Power Supply #2 : Voltage Above Normal | Troubleshooting, "Sensor Supply - Test" |
3510-4 Sensor Supply Voltage 2 : Voltage Below Normal | 2131-4 5 Volt Sensor DC Power Supply #2 : Voltage Below Normal | Troubleshooting, "Sensor Supply - Test" |
3418-3 Fuel Filter (suction side) Differential Pressure Sensor : Voltage Above Normal | 1382-3 Engine Fuel Filter (suction side) Differential Pressure : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
3418-4 Fuel Filter (suction side) Differential Pressure Sensor : Voltage Below Normal | 1382-4 Engine Fuel Filter (suction side) Differential Pressure : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
3551-5 Engine Oil Priming State : Current Below Normal | 338-5 Engine Pre-Lube Pump Relay : Current Below Normal | Troubleshooting, "Prelubrication - Test" |
3551-6 Engine Oil Priming State : Current Above Normal | 338-6 Engine Pre-Lube Pump Relay : Current Above Normal | Troubleshooting, "Prelubrication - Test" |
3563-3Engine Intake Manifold #1 Absolute Pressure : Voltage Above Normal | 1785-3Intake Manifold Pressure Sensor : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
3563-4Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal | 1785-4Intake Manifold Pressure Sensor : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
3563-21Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low | 1785-21Intake Manifold Pressure Sensor : Data Drifted Low | Troubleshooting, "Sensor Supply - Test" |
4210-5Engine Pre-lube Drive : Current Below Normal | N/A | Troubleshooting, "Prelubrication - Test" |
4210-6Engine Pre-lube Drive : Current Above Normal | N/A | Troubleshooting, "Prelubrication - Test" |
5578-3Engine Fuel Delivery Absolute Pressure : Voltage Above Normal | 289-3Fuel Pressure Sensor - Before Fuel Filter : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
5578-4Engine Fuel Delivery Absolute Pressure : Voltage Below Normal | 289-4Fuel Pressure Sensor - Before Fuel Filter : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
5580-3Engine Filtered Fuel Delivery Absolute Pressure : Voltage Above Normal | 460-3Fuel Pressure Sensor - After Fuel Filter : Voltage Above Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
5580-4Engine Filtered Fuel Delivery Absolute Pressure : Voltage Below Normal | 460-4Fuel Pressure Sensor - After Fuel Filter : Voltage Below Normal | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
When the ECM generates a diagnostic code, the ECM logs the code in permanent memory. The ECM has an internal diagnostic clock. Each ECM will record the following information when a code is generated:
- The hour of the first occurrence of the code
- The hour of the last occurrence of the code
- The number of occurrences of the code
This information is a valuable indicator for troubleshooting intermittent problems.
A code is cleared from memory when one of the following conditions occur:
- The service technician manually clears the code.
- The code does not recur for 100 hours.
- A new code is logged and there are already ten codes in memory. In this case, the oldest code is cleared.
Some diagnostic codes may be easily triggered. Some diagnostic codes may log occurrences that did not result in complaints. The most likely cause of an intermittent problem is a faulty connection or damaged wiring. The next likely cause is a component failure. The least likely cause is the failure of an electronic module. Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation.
Note: Always clear logged diagnostic codes after investigating and correcting the problem which generated the code.