Brand: YAMAHA
Category: Offroad Vehicle
Manual Type:
Language:
Manual for YFM 400 FWA P - Troubleshooting and error codes + PDF Download
Uploaded: April 8, 2025, 4:24 a.m.
Manual Publish Date: 2001-06-01
Warranty Summary
No warranty information is provided in this service manual.
This service manual provides information for performing maintenance and repairs on the YAMAHA YFM 400 FWA P Offroad Vehicle. It includes sections on general and maintenance specifications, engine, electrical systems, cable routing, periodic checks and adjustments, chassis, and troubleshooting. This manual is a supplementary guide and should be used in conjunction with the YFM400FWA(M) 2000 SERVICE MANUAL.
Troubleshooting and error codes
| Problem | Check/Procedure | Result | Action |
|---|---|---|---|
| **Starter motor fails to operate** | 1. Fuse (main, ignition) | NO CONTINUITY | Replace the fuse. |
| 2. Battery - Open-circuit voltage: 12.8 V or more at 20 °C (68 °F) | INCORRECT | Clean battery terminals. Recharge or replace battery. | |
| 3. Starter motor - Connect battery positive terminal and starter motor cable using jumper lead | DOES NOT TURN | Repair or replace starter motor. | |
| 4. Starter relay - Check continuity with pocket tester | NO CONTINUITY | Replace starter relay. | |
| 5. Main switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace main switch. | |
| 6. Engine stop switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace handlebar switch (right). | |
| 7. Neutral switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace neutral switch. | |
| 8. Rear brake switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace rear brake switch. | |
| 9. Park switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace park switch. | |
| 10. Start switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace handlebar switch (left). | |
| 11. Wiring connection - Check connections of starting system | POOR CONNECTION | Properly connect starting system. |
Troubleshooting and error codes
| Problem | Check/Procedure | Result | Action |
|---|---|---|---|
| **Starter motor fails to operate** | 1. Fuse (main, ignition) | NO CONTINUITY | Replace the fuse. |
| 2. Battery - Open-circuit voltage: 12.8 V or more at 20 °C (68 °F) | INCORRECT | Clean battery terminals. Recharge or replace battery. | |
| 3. Starter motor - Connect battery positive terminal and starter motor cable using jumper lead | DOES NOT TURN | Repair or replace starter motor. | |
| 4. Starter relay - Check continuity with pocket tester | NO CONTINUITY | Replace starter relay. | |
| 5. Main switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace main switch. | |
| 6. Engine stop switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace handlebar switch (right). | |
| 7. Neutral switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace neutral switch. | |
| 8. Rear brake switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace rear brake switch. | |
| 9. Park switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace park switch. | |
| 10. Start switch - Refer to "SWITCH INSPECTION" | INCORRECT | Replace handlebar switch (left). | |
| 11. Wiring connection - Check connections of starting system | POOR CONNECTION | Properly connect starting system. |