| Fault code No. | 20 | |
| Symptom | When the main switch is ON, there is a big difference in voltage value of the intake air pressure sensor and atmospheric pressure sensor | |
| Fail-safe action | Engine startup: Possible | |
| Riding: Possible | ||
| Diagnostic monitoring code No. | D:03 D:02 | |
| D:03 | Meter display | Displays the intake air pressure. |
| Checking method | Set the engine stop switch to "q", and then push the start switch "®". (If the display value changes, the performance is OK.) | |
| D:02 | Meter display | Displays the atmospheric pressure. |
| Checking method | Compare the actually measured atmospheric pressure with the meter display value. | |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Intake air pressure sensor malfunction | Check in the diagnostic mode (Code No. 03). When engine is stopped: Atmospheric pressure at the current altitude and weather conditions is indicated. 0 m above sea level: Approx. 101 kPa 3000 m above sea level: Approx. 70 kPa Incorrect indication → Sensor malfunction → Replace the intake air pressure sensor. Sensor inspection procedure Refer to "Checking the intake air pressure 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. |
| 2 | Atmospheric pressure sensor malfunction | Check in the diagnostic mode (Code No. 02). When engine is stopped: Atmospheric pressure at the current altitude and weather conditions is indicated. 0 m above sea level: Approx. 101 kPa 3000 m above sea level: Approx. 70 kPa Incorrect indication → Sensor malfunction → Replace the atmospheric pressure sensor. Sensor inspection procedure. Refer to "Checking the atmospheric pressure 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. |
| 3 | ECU malfunction | Replace the ECU. |
*Check the sensor only when the engine is cold