Yamaha TMAX 2020 Service Manual page 428

Checking the smart key system
Before checking the smart key system, make sure that the smart key is located within the operating
range of the smart key system and that the key is turned on.
Vehicle power does not turn on. (Meter light and tail/brake light do not come on.)
TIP
• Before performing this procedure, make sure that there are no sources of strong electromagnetic
waves in the vicinity. (Because the amount of electromagnetic waves will change if the vehicle is
moved a short distance, move the vehicle away from sources of strong electromagnetic waves before
performing the procedure.)
• Use the smart key that is registered to the vehicle.
1. Check the vehicle power.
Refer to "Checking the vehicle
power".
OK
2. Check that the smart key system
indicator light " " flashes when the
ON/start switch is pushed.
NO
3. The smart key system indicator
light " " flashes.
(The indicator light flashes once
every 2 seconds, and then goes off
after approximately 20 seconds.)
Refer to "SMART KEY SYSTEM
SELF-DIAGNOSIS" on page 8-78.
NO
4. The smart key system indicator
light " " flashes.
(The indicator light repeatedly
flashes 2 times, and then goes off
after approximately 20 seconds.)
Refer to "SMART KEY SYSTEM
SELF-DIAGNOSIS" on page 8-78.
NO
NG Repair or replace any defective parts.
• The vehicle can be operated in the emer-
gency mode.  Replace the smart key
or remote control unit.
• The vehicle cannot be turned on in the
emergency mode, but the storage box
YES
light comes on when the seat is opened.
 Replace the remote control unit.
• The storage box light does not come on
when the seat is opened.  Replace the
seat or storage box light.
• The steering lock is stuck and cannot be
released.
• Release the steering lock.  Try moving
YES
the handlebar gently to the left or right.
• The steering lock is not stuck. 
Replace the steering lock unit.
• A steering lock communication error has
occurred.
• Check for an open or short circuit be-
YES tween the steering lock unit and the re-
mote control unit (Light green/Blue–Light
green/Blue).  Repair or replace any
defective parts.
8-73
SMART KEY SYSTEM