2004 YAMAHA YZF-R1S ESP

8-3
CHECKING SWITCH CONTINUITYELEC
CAUTION:
NOTE:
NOTE:
EAS00730
CHECKING SWITCH CONTINUITY
Check each switch for continuity with the pocket
tester. If the continuity reading is incorrect,
check the wiring connections and if necessary,
replace the switch.
Never insert the tester probes into the cou-
pler terminal slots. Always insert the probes
from the opposite end of the coupler
1 tak-
ing care not to loosen or damage the leads.
Pocket tester
90890-03112, YU-3112

Before checking for continuity, set the pocket
tester to “0” and to the “Ω
1” range.

When checking for continuity, switch back and
forth between the switch positions a few times.
The terminal connections for switches (e.g.,
main switch, engine stop switch) are shown in
an illustration similar to the one on the left.
The switch positions
a are shown in the far left
column and the switch lead colors
b are shown
in the top row in the switch illustration.
“
” indicates a continuity of electricity
between switch terminals (i.e., a closed circuit
at the respective switch position).
The example illustration on the left shows
that:
There is continuity between red and brown / red
when the switch is set to “P”.
There is continuity between red, brown / blue
and brown / red when the switch is set to “ON”.
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8-5
CHECKING THE BULBS AND BULB SOCKETSELEC
WARNING
EAS00732
CHECKING THE BULBS AND
BULB SOCKETS
Check each bulb and bulb socket for damage or
wear, proper connections, and also for continu-
ity between the terminals.
Damage / wear
Repair or replace the bulb,
bulb socket or both.
Improperly connected
Properly connect.
No continuity
Repair or replace the bulb, bulb
socket or both.
TYPES OF BULBS
The bulbs used on this motorcycle are shown in
the illustration on the left.

Bulbs
A and B are used for the headlights
and usually use a bulb holder that must be
detached before removing the bulb. The ma-
jority of these types of bulbs can be removed
from their respective socket by turning them
counterclockwise.

Bulbs
C are used for turn signal and
tail / brake lights and can be removed from
the socket by pushing and turning the bulb
counterclockwise.
CHECKING THE CONDITION OF THE
BULBS
The following procedure applies to all of the
bulbs.
1. Remove:

bulb

Since the headlight bulb gets extremely
hot, keep flammable products and your
hands away from the bulb until it has
cooled down.

When changing the tail / brake light bulb,
confirm that the frame has cooled accord-
ing to the warning label and change the
tail / brake light bulb.
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8-7
CHECKING THE BULBS AND BULB SOCKETSELEC
NOTE:
NOTE:
WARNING
Pocket tester
90890-03112, YU-3112
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the re-
spective leads of the bulb socket.
c. Check the bulb socket for continuity. If any of
the readings indicate no continuity, replace
the bulb socket.
CHECKING THE LEDs
The following procedures applies to all of the
LEDs.
1. Check:

LED (for proper operation)
Improper operation
Replace.
a. Disconnect the meter assembly coupler (me-
ter assembly side).
b. Connect two jumper leads
1 from the bat-
tery terminals to the respective coupler ter-
minal.
As for connecting with which coupler terminal,
refer to “CABLE ROUTING” in chapter 2.

A wire that is used as a jumper lead must
have at least the same capacity of the bat-
tery lead, otherwise the jumper lead may
burn.

This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
c. When the jumper leads are connected to the
terminals the respective LED should illumi-
nate.
Does not light
Replace the meter assem-
bly.
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8-53
SELF-DIAGNOSISELEC
SELF-DIAGNOSIS
The YZF-R1(S) features a self-diagnosing system for the following circuit(-s):

Fuel pump thermistor

Oil level switch
If any of these circuits are defective, their respective condition codes will be displayed on the warning
light when the main switch is turned “ON” (irrespective of whether the engine is running or not).
Circuit
Defect(-s)System responseCondition code
Fuel pump
thermistor
Open-circuit

Short-circuit
The fuel level warning light indi-
cate the condition code.Refer to *1
Oil level switch
Open-circuit

Short-circuit
The oil level warning light indicate
the condition code.Refer to *2
*1Condition code
Fuel level warning light
*
2Condition code
Oil level warning light
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