| Fault code No. | 59 | |
| Symptom | Open or short circuit of accelerator position sensor lead | |
| Fail-safe action | Engine startup: Possible under certain conditions | |
| Riding: Possible under certain conditions | ||
| Diagnostic monitoring code No. | D:14 D:15 | |
| D:14 | Meter display | Accelerator position sensor signal 1: 12-22 (fully closed position) 97-107 (fully opened position) |
| Checking method | Check with throttle grip fully closed. Check with throttle grip fully open. | |
| D:15 | Meter display | Accelerator position sensor signal 2: 10-24 (fully closed position) 95-109 (fully opened position) |
| Checking method | Check with throttle grip fully closed. Check with throttle grip fully open. | |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Connection of accelerator position 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. | Place the main switch to the ON position, and 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 wire harness. | Place the main switch to the ON position, and 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 White-White Blue-Blue Black-Black | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 4 | Sensor installation status | Check for loose mounting, pinched mounting, or hard mounting. Make sure that the mounting position is correct. Refer to "Adjusting the accelerator position sensor". | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 5 | Supply voltage of accelerator position sensor lead | Check the supply voltage. Accelerator position sensor signal 1 Black/Blue-White Accelerator position sensor signal 2 Black/Blue-Black Refer to "Checking the accelerator position sensor" Line disconnection points Output voltage Disconnection of ground lead 5 V Disconnection of output line 0 V Disconnection of power supply line 0 V | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 6 | Accelerator position sensor malfunction | Check the accelerator position sensor signal 1 diagnostic mode (Code No. 14). When throttle is fully closed: A value of 12-22 is indicated. When throttle is fully opened: A value of 97-107 is indicated. Check the accelerator position sensor signal 2 diagnostic mode (Code No. 15). When throttle is fully closed: A value of 10-24 is indicated. When throttle is fully opened: A value of 95-109 is indicated. If the indication is outside of range: Replace the accelerator position sensor. | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 7 | ECU malfunction | Replace the ECU. |