Yamaha 2012 TMAX XP500A Service Manual page 430

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item/components and
probable cause
2 Throttle valve does not fully
close.
3 Stuck fast idle plunger
detected.
4 ECU malfunction
TIP
• Do not remove the fast idle plunger.
• If fault codes 16 and 37 are indicated simultaneously, take the actions specified for fault code 16
first.
• If fault codes 37 and 42 are indicated simultaneously, take the actions specified for fault code 42
first.
• If fault codes 37 and 46 are indicated simultaneously, take the actions specified for fault code 46
first.
37
Engine speed is high when the engine is idling.
Able to start engine
Able to drive vehicle
—
—
—
Check or maintenance job
• Check the throttle body.
Refer to "THROTTLE
BODY" on page 7-5.
• Check the throttle cables.
Refer to "CHECKING THE
THROTTLE GRIP" on page
3-32.
• Check the throttle body.
Refer to "THROTTLE
BODY" on page 7-5.
Replace the ECU.
FUEL INJECTION SYSTEM
8-55
Sensor inspection proce-
dure
Start and idle the engine for
approximately 10 seconds.
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start and idle the engine for
several minutes. Then, check
the fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.