| Fault code No. | 19 |
| Symptom | Open or short circuit of ECU input line (Blue/Yellow lead) |
| Fail-safe action | Engine startup: Impossible |
| Riding: Impossible | |
| Diagnostic monitoring code No. | D:20 |
| Meter display | Sidestand switch: ON (stand retracted) OFF (stand extended) |
| Checking method | Set on/off the sidestand switch. (with the transmission in gear.) |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Connection of sidestand switch 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. | Place the main switch to the ON position, and check the fault code indication when the sidestand is retracted and extended. 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 wire harness. | Place the main switch to the ON position, and check the fault code indication when the sidestand is retracted and extended. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 3 | Connection of main switch 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. | Place the main switch to the ON position, and check the fault code indication when the sidestand is retracted and extended. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 4 | Continuity of wire harness | Open or short circuit → Replace the wire harness. Blue/Yellow-Blue/Yellow Blue/Black-Blue/Black | Place the main switch to the ON position, and check the fault code indication when the sidestand is retracted and extended. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 5 | Sidestand switch malfunction | Diagnostic mode (Code No. 20). Sidestand retracted: ON indication Sidestand extended: OFF indication Indication is incorrect. → Replace the sidestand switch. | Place the main switch to the ON position, and check the fault code indication when the sidestand is retracted and extended. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 6 | ECU malfunction | Replace the ECU. |