| Fault code No. | 46 |
| Symptom | Incorrect voltage is supplied to the ECU. |
| Fail-safe action | Engine startup: Possible |
| Riding: Possible | |
| Diagnostic monitoring code No. | |
| Meter display | |
| Checking method |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Connection of 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 wire harness. | Start and idle the engine for approximately 5 seconds. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 2 | Continuity of wire harness | Open or short circuit → Replace the wire harness. Between the battery and main switch Red-Red Between the main switch and ignition fuse Brown/Blue-Brown/Blue Between the ignition fuse and ECU Red/White-Red/White | Start and idle the engine for approximately 5 seconds. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 3 | Battery malfunction | Check the battery voltage. Refer to "Checking and charging the battery". Battery malfunction → Recharge or replace the battery. | Start and idle the engine for approximately 5 seconds. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 4 | Stator coil malfunction | Check the stator coil output. Refer to "Checking the stator coil". Stator coil malfunction → Replace the stator coil. | Start and idle the engine for approximately 5 seconds. Then, check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 5 | ECU malfunction | Replace the ECU. |