P1609; Troubleshooting - Yamaha MT-09 2021 Service Manual

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.
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.
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.
At sea level
1000 m (3300 ft) above sea level
2000 m (6700 ft) above sea level
3000 m (9800 ft) above sea level
• When engine is cranking: Make sure that the indication value changes.
101 kPa (757.6 mmHg, 29.8 inHg)
Approx. 90 kPa (675.1 mmHg, 26.6 inHg)
Approx. 80 kPa (600.0 mmHg, 23.6 inHg)
Approx. 70 kPa (525.0 mmHg, 20.7 inHg)
9-241
P1609