SEAL 8D2327 - Caterpillar

Table 1 lists the diagnostic trouble codes that apply to the engines that are covered in this manual. Use the Caterpillar Electronic Technician (ET) to determine the codes that are active or logged. Then refer to the appropriate troubleshooting procedure for more information.Note: A requirement for all troubleshooting is that the troubleshooting is based on active and/or passive diagnostic trouble codes. Do not troubleshoot based on flash codes alone.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.
Table 1
List of Diagnostic Trouble Codes
J1939 Code and Description CDL Code and Description Troubleshooting Procedure
N/A 486-3
Engine Fan Reverse Switch : Voltage Above Normal Refer to the Machine Troubleshooting Guide
N/A 486-4
Engine Fan Reverse Switch : Voltage Below Normal Refer to the Machine Troubleshooting Guide
N/A 544-2
Engine Cooling Fan Speed Sensor : Erratic, Intermittent, or Incorrect Troubleshooting, "Cooling Fan Speed - Test"
N/A 544-8
Engine Cooling Fan Speed Sensor : Abnormal Frequency, Pulse Width, or Period Troubleshooting, "Cooling Fan Speed - Test"
N/A 1076-5
Engine Cooling Fan Bypass Solenoid : Current Below Normal Troubleshooting, "Cooling Fan Control - Test"
N/A 1076-6
Engine Cooling Fan Bypass Solenoid : Current Above Normal Troubleshooting, "Cooling Fan Control - Test"
N/A 1937-2
Engine Coolant Flow Switch : Erratic, Intermittent, or Incorrect Troubleshooting, "Sensor Signal (Analog, Passive) - Test"
29-2
Accelerator Pedal Position 2 : Erratic, Intermittent, or Incorrect 774-2
Secondary Throttle Position Sensor: Erratic, Intermittent, or Incorrect Troubleshooting, "Speed Control - Test"
29-3
Accelerator Pedal Position 2 : Voltage Above Normal 774-3
Secondary Throttle Position Sensor: Voltage Above Normal Troubleshooting, "Speed Control - Test"
29-4
Accelerator Pedal Position 2 : Voltage Below Normal 774-4
Secondary Throttle Position Sensor: Voltage Below Normal Troubleshooting, "Speed Control - Test"
29-8
Accelerator Pedal Position 2 : Abnormal Frequency, Pulse Width, or Period 774-8
Secondary Throttle Position Sensor: Abnormal Frequency, Pulse Width, or Period Troubleshooting, "Speed Control - Test"
91-2
Accelerator Pedal Position 1 : Erratic, Intermittent, or Incorrect 91-2
Throttle Position Sensor : Erratic, Intermittent, or Incorrect Troubleshooting, "Speed Control - Test"
91-3
Accelerator Pedal Position 1 : Voltage Above Normal 91-3
Throttle Position Sensor : Voltage Above Normal Troubleshooting, "Speed Control - Test"
91-4
Accelerator Pedal Position 1 : Voltage Below Normal 91-4
Throttle Position Sensor : Voltage Below Normal Troubleshooting, "Speed Control - 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"
97-3
Water In Fuel Indicator : Voltage Above Normal 3547-3
Water in Fuel System Switch : Voltage Above Normal Troubleshooting, "Water in Fuel - Test"
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