| Fault code No. | 41 |
| Symptom | Open or short circuit of lean angle sensor lead |
| Fail-safe action | Engine startup: Impossible |
| Riding: Impossible | |
| Diagnostic monitoring code No. | D:08 |
| Meter display | Lean angle sensor: 0.4-1.4 (upright) 3.7-4.4 (overturned) |
| Checking method | Remove the lean angle sensor and incline more than 45 degrees. |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Connection of lean angle sensor coupler. Check the connection of the coupler is secure. Remove the coupler, and check each pin (for bending, wear, or locking). | Poor connection → Connect it securely, or repair/replace the wire harness. | Rotate the main switch to the OFF position first, and then rotate it to the ON position again. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 2 | Connection of main harness ECU coupler. Check the connection of the coupler is secure. Remove the coupler, and check each pin (for bending, wear, or locking). | Poor connection → Connect it securely, or repair/replace the harness. | Rotate the main switch to the OFF position first, and then rotate it to the ON position again. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 3 | Continuity of wire harness | Open or short circuit → Replace the wire harness. Black/Blue-Black/Blue Yellow/Green-Yellow/Green Blue-Blue | Rotate the main switch to the OFF position first, and then rotate it to the ON position again. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 4 | Lean angle sensor malfunction | Refer to "Checking the lean angle sensor". | Rotate the main switch to the OFF position first, and then rotate it to the ON position again. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 5 | ECU malfunction | Replace the ECU. |