303.5E2 CR Mini Hydraulic Excavator Machine ECM Diagnostic Trouble Codes Caterpillar


Diagnostic Trouble Codes
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1.1. DTC = Component Identifier (CID) and Failure Mode Identifier (FMI) Information

The following is a list of Diagnostic Trouble Codes (DTCs) for the machines. When a diagnostic code is active, refer to the Troubleshooting section of this manual for a specific troubleshooting procedure.

Each test procedure listed in the diagnostic trouble code table below contains a simplified schematic with only the relevant components related to that test procedure. Though the schematics are electrically correct, not all the possible harness connectors are shown. Refer to the latest revision of the Electrical Schematic, UENR6662 to view the complete electrical schematic.

DTC = Component Identifier (CID) and Failure Mode Identifier (FMI) Information

Table 1
Machine ECM (MID 39) 
DTC  Description  Procedure 
41-3  8 VDC Supply : Voltage Above Normal  Sensor Supply - Test 
41-4  8 VDC Supply : Voltage Below Normal  Sensor Supply - Test 
91-2  Throttle Position Sensor : Data Erratic, Intermittent, or Incorrect  Operator Control Switch (Switch to Ground) - Test 
96-3  Fuel Level Sensor : Voltage Above Normal  Sensor Signal (Analog, Passive) - Test 
96-4  Fuel Level Sensor : Voltage Below Normal  Sensor Signal (Analog, Passive) - Test 
110-3  Engine Coolant Temperature Sensor : Voltage Above Normal  Sensor Signal (Analog, Passive) - Test 
110-4  Engine Coolant Temperature Sensor : Voltage Below Normal  Sensor Signal (Analog, Passive) - Test 
168-5  Electrical System Voltage : Current Below Normal  Electrical Power Supply - Test 
171-3  Ambient Air Temperature Sensor : Voltage Above Normal  Sensor Signal (Analog, Passive) - Test 
171-4  Ambient Air Temperature Sensor : Voltage Below Normal  Sensor Signal (Analog, Passive) - Test 
190-3  Engine Speed Sensor : Voltage Above Normal  Sensor Signal (Analog, Active) - Test / Engine Speed Control - Test 
190-4  Engine Speed Sensor : Voltage Below Normal  Sensor Signal (Analog, Active) - Test / Engine Speed Control - Test 
247-9  SAE J1939 Data Link : Abnormal Update Rate  CAN Data Link - Test 
262-3  5 VDC Supply : Voltage Above Normal  Sensor Supply - Test 
262-4  5 VDC Supply : Voltage Below Normal  Sensor Supply - Test 
590-9  Engine Control Module : Abnormal Update Rate  CAN Data Link - Test 
1178-3  Overload Pressure Sensor : Voltage Above Normal  Sensor Signal (PWM) - Test 
1178-4  Overload Pressure Sensor : Voltage Below Normal  Sensor Signal (PWM) - Test 
1178-8  Overload Pressure Sensor : Abnormal Frequency, Pulse Width, or Period  Sensor Signal (PWM) - Test 
1657-3  Left Joystick Thumbwheel : Voltage Above Normal  Sensor Signal (PWM) - Test 
1657-4  Left Joystick Thumbwheel : Voltage Below Normal  Sensor Signal (PWM) - Test 
1657-8  Left Joystick Thumbwheel : Abnormal Frequency, Pulse Width, or Period  Sensor Signal (PWM) - Test 
1657-13  Left Joystick Thumbwheel : Out of Calibration  Sensor Signal (PWM) - Test 
1658-3  Right Joystick Thumbwheel : Voltage Above Normal  Sensor Signal (PWM) - Test 
1658-4  Right Joystick Thumbwheel : Voltage Below Normal  Sensor Signal (PWM) - Test 
1658-8  Right Joystick Thumbwheel : Abnormal Frequency, Pulse Width, or Period  Sensor Signal (PWM) - Test 
1658-13  Right Joystick Thumbwheel : Out of Calibration  Sensor Signal (PWM) - Test 
1933-3  Blade Angle Left Solenoid : Voltage Above Normal  Solenoid Valve - Test 
1933-5  Blade Angle Left Solenoid : Current Below Normal  Solenoid Valve - Test 
1933-6  Blade Angle Left Solenoid : Current Above Normal  Solenoid Valve - Test 
1934-3  Blade Angle Right Solenoid : Voltage Above Normal  Solenoid Valve - Test 
1934-5  Blade Angle Right Solenoid : Current Below Normal  Solenoid Valve - Test 
1934-6  Blade Angle Right Solenoid : Current Above Normal  Solenoid Valve - Test 
2211-3  Auxiliary #1 Port B Solenoid : Voltage Above Normal  Solenoid Valve - Test 
2211-5  Auxiliary #1 Port B Solenoid : Current Below Normal  Solenoid Valve - Test 
2211-6  Auxiliary #1 Port B Solenoid : Current Above Normal  Solenoid Valve - Test 
2212-3  Auxiliary #1 Port A Solenoid : Voltage Above Normal  Solenoid Valve - Test 
2212-5  Auxiliary #1 Port A Solenoid : Current Below Normal  Solenoid Valve - Test 
2212-6  Auxiliary #1 Port A Solenoid : Current Above Normal  Solenoid Valve - Test 
2448-9  Graphical Display Module : Abnormal Update Rate  CAN Data Link - Test 
2527-3  Angle Blade Thumbwheel : Voltage Above Normal  Sensor Signal (PWM) - Test 
2527-4  Angle Blade Thumbwheel : Voltage Below Normal  Sensor Signal (PWM) - Test 
2527-8  Angle Blade Thumbwheel : Abnormal Frequency, Pulse Width, or Period  Sensor Signal (PWM) - Test 
2828-3  Main Hydraulic Pump Pressure Sensor : Voltage Above Normal  Sensor Signal (PWM) - Test 
2828-4  Main Hydraulic Pump Pressure Sensor : Voltage Below Normal  Sensor Signal (PWM) - Test 
2828-8  Main Hydraulic Pump Pressure Sensor : Abnormal frequency, pulse width, or period  Sensor Signal (PWM) - Test 
2855-3  Main Hydraulic Pump #1 Solenoid : Voltage Above Normal  Solenoid Valve - Test 
2855-5  Main Hydraulic Pump #1 Solenoid : Current Below Normal  Solenoid Valve - Test 
3528-3  Barometric Pressure Sensor : Voltage Above Normal  Sensor Signal (Analog, Active) - Test 
3528-4  Barometric Pressure Sensor : Voltage Below Normal  Sensor Signal (Analog, Active) - Test 
3977-3  Boom Swing Left Solenoid : Voltage Above Normal  Solenoid Valve - Test 
3977-5  Boom Swing Left Solenoid : Current Below Normal  Solenoid Valve - Test 
3977-6  Boom Swing Left Solenoid : Current Above Normal  Solenoid Valve - Test 
3978-3  Boom Swing Right Solenoid : Voltage Above Normal  Solenoid Valve - Test 
3978-5  Boom Swing Right Solenoid : Current Below Normal  Solenoid Valve - Test 
3978-6  Boom Swing Right Solenoid : Current Above Normal  Solenoid Valve - Test 
5251-3  Variable Angle Boom Extend Solenoid : Voltage Above Normal  Solenoid Valve - Test 
5251-5  Variable Angle Boom Extend Solenoid : Current Below Normal  Solenoid Valve - Test 
5251-6  Variable Angle Boom Extend Solenoid : Current Above Normal  Solenoid Valve - Test 
5252-3  Variable Angle Boom Retract Solenoid : Voltage Above Normal  Solenoid Valve - Test 
5252-5  Variable Angle Boom Retract Solenoid : Current Below Normal  Solenoid Valve - Test 
5252-6  Variable Angle Boom Retract Solenoid : Current Above Normal  Solenoid Valve - Test 

Information System:

336D 2L and 340D 2L Excavators Machine Systems Pilot Valve (Joystick) - Remove and Install
325F Excavator Machine Systems Final Drive - Assemble
325F Excavator Machine Systems Final Drive - Disassemble
538 Forest Machine Machine Systems Process for Setting Up the Work Tool
336D 2L and 340D 2L Excavators Machine Systems Hydraulic Tank - Remove and Install
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Gear Motor (Hydraulic Fan)
336D2/336D2 GC Excavator Engine Supplement Turbocharger - Remove and Install
Counterbalance Valves Are Now Used on Certain Hydraulic Excavator Forestry Grapples {5362, 5457, 5555, 6307}
538 Forest Machine Machine Systems Relief Valve (Crossover) - Test and Adjust
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Assemble - Rear Hydrostatic Piston Motor
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Disassemble - Rear Hydrostatic Piston Motor
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Assemble - Front Hydrostatic Piston Motor
Installation Procedure for the Hydraulic Hand Control Gp (Universal) {5063}
303.5E2 CR Mini Hydraulic Excavator Machine ECM Event Codes
303.5E2 CR Mini Hydraulic Excavator Machine ECM General Information
M314F and M316F Wheeled Excavators Hydraulic System Main Pump (Minimum Displacement) - Test and Adjust - Test without Flow Meter
336D 2L and 340D 2L Excavators Machine Systems Pilot Valve (Travel) - Remove and Install
336D 2L and 340D 2L Excavators Machine Systems Main Hydraulic Pump - Remove and Install
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Service Brake
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Service Brake
336D 2L and 340D 2L Excavators Machine Systems Control Manifold (Pilot Oil) - Remove and Install
DFS118, DFS121 and DFS124 Silage Defacers Lifting and Tying Down
GSH420, GSH425, GSH440, GSH520, GSH525, GSH455 and GSH555 Orange Peel Grapples Mounting Bracket - Remove and Install
415F2 Industrial Loader Machine Systems Pitch Cylinder (3-Point Hitch) - Remove and Install