Yamaha R15 2022 Service Manual page 476

INSTALLING THE ECU (engine control unit)
1. Connect:
• ECU coupler "1"
TIP
Make sure that the ECU coupler is connected in
the correct position, and then push the ECU cou-
pler in the direction of the arrow shown until a
distinct "click" is heard.
2. Install:
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
EAS30552
CHECKING AND CHARGING THE BATTERY
ECA20530
• This is a VRLA (Valve Regulated Lead Acid)
battery. Never remove the sealing caps be-
cause the balance between cells will not be
maintained and battery performance will
deteriorate.
• Charging time, charging amperage and
charging voltage for a VRLA (Valve Regu-
lated Lead Acid) battery are different from
those of conventional batteries. The VRLA
(Valve Regulated Lead Acid) battery should
be charged according to the appropriate
charging method. If the battery is over-
charged, the electrolyte level will drop con-
siderably. Therefore, take special care
when charging the battery.
TIP
Since VRLA (Valve Regulated Lead Acid) bat-
teries are sealed, it is not possible to check the
charge state of the battery by measuring the
specific gravity of the electrolyte. Therefore, the
charge of the battery has to be checked by mea-
suring the voltage at the battery terminals.
ELECTRICAL COMPONENTS
1. Remove:
2. Disconnect:
ECA13640
First, disconnect the negative battery lead
"1", and then positive battery lead "2".
1
3. Check:
TIP
• The charge state of a VRLA (Valve Regulated
• No charging is necessary when the open-cir-
8-143
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Battery leads
(from the battery terminals)
WARNING
2
1
• Battery charge
a. Connect a multimeter "3" to the battery ter-
minals.
• Positive multimeter probe →
Positive battery terminal
• Negative multimeter →
Negative battery terminal
Lead Acid) battery can be checked by measur-
ing its open-circuit voltage (i.e., the voltage
when the positive battery terminal is discon-
nected).
cuit voltage equals or exceeds 12.8 V.
b. Check the charge of the battery, as shown
in the charts and the following example.
Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20–30%
ELEC – +
3