Yamaha MT-09 2021 - P1609; Troubleshooting

9-241
P1609
EAS20789
P1609
EAS33532
TROUBLESHOOTING
Item
Intake air pressure sensor 2: clogging of hose or sensor disconnection
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
TIP
If more than one DTC is detected at the same time, perform troubleshooting of DTC listed below first.
• P0122, P0123, P0222, P0223, P0335, P1606, P1607, P1608, P2135
1. Installed condition of intake air pressure sensor 2 hose.
• Check for detached, clogged, kinked or pinching.
Refer to “THROTTLE BODIES” on page 7-5.
2. Defective intake air pressure sensor 2.
• Execute the diagnostic mode. (Code 04)
• When engine is stopped: Atmospheric pressure at the current altitude and weather conditions is in-
dicated.
• When engine is cranking: Make sure that the indication value changes.
Is check result OK?
YES
→ Go to step 2.
NO
a. Repair or replace the intake air pressure sensor 2 hose.
Refer to “THROTTLE BODIES” on page 7-5.
b. Start the engine and let it idle for approximately 5 seconds, and then check the condition of the
DTC using the malfunction mode of the YDT.
Is it in the “Recovered” condition?
YES
→ Go to step 3, and complete the service.
NO
→ Go to step 2.
At sea level 101 kPa (757.6 mmHg, 29.8 inHg)
1000 m (3300 ft) above sea level Approx. 90 kPa (675.1 mmHg, 26.6 inHg)
2000 m (6700 ft) above sea level Approx. 80 kPa (600.0 mmHg, 23.6 inHg)
3000 m (9800 ft) above sea level Approx. 70 kPa (525.0 mmHg, 20.7 inHg)