Part of the Yanmar Repair Manuals.
Getting your industrial engine back online starts with this 234-page Yanmar TNV Series electronic control troubleshooting manual, which breaks down diagnostic procedures for the entire TNV series (3TNV82A–4TNV106T). You get complete diagnostic trouble code breakdowns, factory electrical wiring diagrams, and step-by-step testing procedures for tracing analog input failures. Open to the failure indicator flashing patterns or use the factor analysis charts to quickly isolate eco-governor speed fluctuations and black smoke issues without guessing. Verify your speed sensor resistance reads 500 ± 100Ω and check the EGR step motor coil resistance at 15 ± 2Ω before replacing expensive components. Don't waste hours throwing parts at a mysterious fault code. Grab this neatly bookmarked file, jump straight to the correct test procedure on your tablet, and get your equipment running today.
What's Inside This Yanmar TNV Series (3TNV82A–4TNV106T) Manual
| System | Pages | Key Topics |
|---|---|---|
| DTCs (Diagnostic Trouble Codes) General Description | 5-134 | Analog Input Related Failures, Pulse Sensor Related Failures, Contact Output Related Failures, Contact Input Related Failures, Actuators Etc. |
| Method and Procedure of Failure Diagnosis | 135-209 | Description Items, Analog Input Related Failures, Pulse Sensor Related Failures, Contact Output Related Failures, Contact Input Related Failures, Actuator Related Failures |
| Using the Failure Indicator for Failure Diagnosis | 210-211 | Flashing Patterns of the Failure Indicator |
| Factor Analysis | 212-219 | 2G-Type Eco-Governor Speed-Fluctuation Factor Analysis, 2G-Type Eco-Governor Engine Stalling/Start-Up Inability Factor Analysis, 2G-Type Eco-Governor Black Smoke Factor Analysis |
| Special Service Tools | 220 | Compression Gauge Kit |
| Troubleshooting by Measuring Compression Pressure | 221-223 | Compression Pressure Measurement Method, Standard Compression Pressure (Reference Value), Engine Speed and Compression Pressure (Use for Reference) |
| Quick Reference Table for Troubleshooting | 224-230 | Measured Value and Troubleshooting, Failure Diagnostic List |
| Electrical Wiring | 231-234 |
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
- Yanmar 3TNV & 4TNV Electronic Control Troubleshooting Manual (0DTNV-G00600)
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Accelerator Sensor Resistance (Sensor A - C) | 5 ± 1.5kΩ | p. 144 |
| Speed Sensor Resistance (Sensors A - B) | 500 ± 100Ω | p. 168 |
| CSD Solenoid Valve Coil Resistance (400W) | 8Ω (at 23°C) | p. 182 |
| EGR Step Motor Coil Resistance | 15 ± 2Ω | p. 187 |
| Rack Actuator Coil Resistance (Coils A - B) | 1Ω ± 10% | p. 197 |
| Compression Pressure Deviation Between Cylinders | 29 - 43 psi (0.2 - 0.3 MPa; 2 - 3 kgf/cm²) | p. 223 |
| 3TNV82A | ||
| Compression Pressure Standard, 3TNV82A | 443 - 473 psi (3.06 - 3.26 MPa; 30 - 32 kgf/cm²) | p. 223 |
| Compression Pressure Limit, 3TNV82A | 340 - 370 psi (2.35 - 2.55 MPa; 24 - 26 kgf/cm²) | p. 223 |
| 3TNV84, 4TNV84 | ||
| Compression Pressure Standard (3TNV84, 4TNV84) | 455 - 485 psi (3.14 - 3.34 MPa; 32 - 34 kgf/cm²) | p. 223 |
| Compression Pressure Limit (3TNV84, 4TNV84) | 355 - 385 psi (2.45 - 2.65 MPa; 25 - 27 kgf/cm²) | p. 223 |
| 3TNV88, 4TNV88, 4TNV94L, 4TNV98, 4TNV98T, 4TNV106, 4TNV106T | ||
| Compression Pressure Standard (3TNV88, 4TNV88, 4TNV94L, 4TNV98, 4TNV98T, 4TNV106, 4TNV106T) | 483 - 513 psi (3.33 - 3.53 MPa; 34 - 36 kgf/cm²) | p. 223 |
| Compression Pressure Limit (3TNV88, 4TNV88, 4TNV94L, 4TNV98, 4TNV98T, 4TNV106, 4TNV106T) | 384 - 414 psi (2.65 - 2.85 MPa; 27 - 29 kgf/cm²) | p. 223 |
