| Fault code No. | 15 | |
| Symptom | Open or short circuit of throttle position sensor lead | |
| Fail-safe action | Engine startup: Possible under certain conditions | |
| Riding: Possible under certain conditions | ||
| Diagnostic monitoring code No. | D:01 D:13 | |
| D:01 | Meter display | Throttle position sensor signal 1: 12-21 (fully closed position) 97-106 (fully opened position) |
| Checking method | Check with throttle valve fully closed. Check with throttle valve fully opened. | |
| D:13 | Meter display | Throttle position sensor signal 2: 9-23 (fully closed position) 94—108 (fully opened position) |
| Checking method | Check with throttle valve fully closed. Check with throttle valve fully opened. | |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Connection of throttle 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 throttle 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 throttle position sensor lead | Check the supply voltage. Throttle position sensor signal 1 Black/Blue-White Throttle position sensor signal 2 Black/Blue-Black Refer to "Checking the throttle 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 | Throttle position sensor malfunction | Check the throttle position sensor signal 1 diagnostic mode (Code No. 01). When throttle is fully closed: A value of 12-21 is indicated. When throttle is fully opened: A value of 97-106 is indicated. Check the throttle position sensor signal 2 diagnostic mode (Code No. 13). When throttle is fully closed: A value of 9-23 is indicated. When throttle is fully opened: A value of 94-108 is indicated. If the indication is outside of range: Replace the throttle 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. |