Operation and Test Manual (TM14600X019) provides operating checks, diagnostic procedures, and system testing information for 544G 4WD Wheeled Loader. Coverage includes machines with Product Identification Numbers (PIN) starting from:
1YN544GA__DA000011YN544GA__LA00001
Operation and test sections help quickly identify the majority of routine failures through structured checks, theory of operation, system diagrams, and test procedures. Information is organized by machine systems and components, allowing technicians to efficiently verify operation and perform diagnostic tests during troubleshooting.
This manual includes electrical circuit diagrams, hydraulic diagrams, diagnostic trouble codes (DTCs).
For mechanical repair and service procedures, refer to Repair Manual TM14601X019.
Detailed engine and fuel system service procedures are not included in this manual and are provided in the following dedicated technical manuals: CTM104 and CTM120019.
Engine Control Unit (ECU) Diagnostic Trouble Codes-L Engine
Engine Control Unit (ECU) Diagnostic Trouble Codes-D Engine
Transmission Control Unit (TCU) Diagnostic Trouble Codes
Vehicle Control Unit (VCU) Diagnostic Trouble Codes
Vehicle Control Unit 2 (VCU2) Diagnostic Trouble Codes
Sealed Switch Module (SSM) Diagnostic Trouble Codes
Primary Display Unit (PDU) Diagnostic Trouble Codes
Operational Checkout Procedure
Engine
Theory of Operation
System Diagrams
Diagnostic Information
Adjustments
Tests
Electrical System
Theory of Operation
System Diagrams
Diagnostic Information
Monitor Operation
Diagnostic Test Box
Adjustments
Tests
Power Train
Theory of Operation
System Diagrams
Diagnostic Information
Adjustments
Tests
Hydraulic System
Theory of Operation
System Diagrams
Diagnostic Information
Adjustments
Tests
Heating and Air Conditioning
Theory of Operation
System Diagrams
Diagnostic Information
Tests
General
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