John Deere S540, S680, S690 Diagnostics Service Manual
John Deere S540 S680 S690 Combine Diagnostic and Tests Service Manual
TM80391
Complete Table of Contents Breakdown:
00 – General Information & Safety
Specifications (Dimensions, Capacities, Weights)
Maintenance Interval Charts (Critical Schedules)
General Safety Procedures & Towing Instructions
Serial Number Locations
📑 Table of Contents Overview:
- General Information & Safety
- Safety precautions and procedures
Combine identification and general specifications
Diagnostic and testing procedures
Diagnostic Trouble Codes (DTCs) - Engine control unit (ECU) codes for T2, T3, and iT4 engines
ATC, AYM, CAB, CRU, CSM, PTP, SSU, VTi system codes
Hydraulic, electrical, and power distribution fault codes
Observable Symptoms & Troubleshooting - Engine performance issues
Hydraulic system failures
Electrical and control unit malfunctions
Cab climate control diagnostics
Electrical System & Control Units - CAN Bus diagnostics
Engine, fuel, and power distribution circuits
Lighting and Ag Management Solutions (AMS)
Wiring diagrams and schematics
Engine & Cooling System - Air intake and cooling system components
Fan speed control and radiator diagnostics
Fuel injection system troubleshooting
Compression tests and turbocharger diagnostics
Hydraulic System - Pressure regulation and testing
Header lift and feeder house hydraulics
Steering and braking hydraulic circuits
Residue system hydraulic operation
Transmission & Drives - Main Gearcase diagnostics
Ground drive and traction control systems
Transmission performance tests
Adjustments and calibration procedures
Cab & Operator Station - Climate control and air conditioning system
Display monitor diagnostics
Electrical connectors and control modules
Steering, Brakes, & Chassis - Steering angle sensor adjustments
Brake pressure and hydraulic function testing
Chassis control unit troubleshooting
JOHN DEERE S540, S550, S660, S670, S680, S690 Combines Diagnostics and Tests Service Manual TM80391