1999 YAMAHA YZF-R7 turn signal

8 - 1
–+ELEC

ELECTRICAL COMPONENTS
EB800000
ELECTRICAL
ELECTRICAL COMPONENTS
1
Wire harness
2
Main switch
3
Front brake light switch
4
Ignition coils
5
Clutch switch
6
Throttle position sensor
7
Intake air temperature sensor
8
Intake air pressure sensor
9
Atmospheric pressure sensor
0
Turn signal relay
A
Relay unit
B
ECU
C
CDI unit
D
Fuse box
E
Fall detection switch
F
Starter relay
G
Main fuse
H
Main relay
I
Battery
J
Rectifier/regulator
K
Rear brake light switch
L
Neutral switch
M
Speed sensor
N
Sidestand switch
O
Stator coil assembly
P
Oil level switch
Q
Pickup coil
R
Radiator fan
S
Horn
T
Coolant temperature
sender
U
Thermo switch
V
Camshaft sensor
8

8 - 3
–+ELEC

CHECKING THE SWITCHES
EB801010
CHECKING THE SWITCHES
Check each switch for damage or wear, proper connections, and also for continuity between
the terminals. Refer to “CHECKING SWITCH CONTINUITY”.
Damage/wear
® Repair or replace the switch.
Improperly connected ® Properly connect.
Incorrect continuity reading ® Replace the switch.
1Main switch
2Light switch
3Pass switch
4Dimmer switch
5Turn signal switch6Horn switch
7Clutch switch
8Engine stop switch
9Start switch
0Front brake light switchAOil level switch
BRear brake light switch
CFuse
DNeutral switch
ESidestand switch
1L/YL/B
LL/R
R
Br/L
OFF
ONP
L/RLBr/LRL/YL/B
3
4
5
Br/WR/YPLB
Dg Y
G Ch
B/YL/YPASS—
R/YY
67
YG
—BP
(BLUE)
(BLACK)
(BLACK)
R/WBr
R/BB
G/YL/W
B
B
G/YBr
OFF
ChBr/WDg
8R/WR/B
9
0—L/WB
2R/YL•
C
E
(BLUE)
B
B
B D
(BROWN)
Sb
A
W
L/YB/Y
L/YB/Y

8 - 4
–+ELECCHECKING THE BULBS AND BULB SOCKETS
EB801020
CHECKING THE BULBS AND
BULB SOCKETS
Check each bulb and bulb socket for dam-
age or wear, proper connections, and also
for continuity between the terminals.
Damage/wear ® Repair or replace the
bulb, bulb socket or both.
Improperly connected ® Properly con-
nect.
Incorrect continuity reading ® 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 headlights
and usually use a bulb holder which must
be detached before removing the bulb.
The majority of these bulbs can be
removed from their respective socket by
turning them counterclockwise.
• Bulb C is used for turn signal and tail/
brake lights and can be removed from the
socket by pushing and turning the bulb
counterclockwise.
• Bulbs
D and E are used for meter and
indicator lights and can be removed from
their respective socket by carefully pulling
them out.
CHECKING THE CONDITION OF THE BULBS
The following procedure applies to all of
the bulbs.
1.Remove:
• bulb

8 - 21
–+ELECSIGNALING SYSTEM
EB806000
SIGNALING SYSTEM
CIRCUIT DIAGRAM
B
(BLACK) (DARK GRAY)
(BLACK)B
L
B
L
K
WWW
86
7RR
Br
BBRR
L/W BrL/W
RR
R
B
B
BBB
B
R
WWW(BLACK)
L/W
B
R/B
R/L
G/B
R/L
L/W
B (BLUE)
Gy
Gy/B
B
B(BLUE)
Gy
B
Br
G
L/R
B
Br
G L/R
B
Br/W
Br
B
B
B
B
L/WBr
R/W
G/Y R/W
B/WB/L(GRAY)
(BROWN)
h
Br
YB
BBr
Y (BROWN) (BROWN)
R/YLBr/WP
B(BLUE) (BLUE)(BLACK) (BLACK)
Br
BBR/WR/B
Y
P
ON OFF
R
RL/R
LBr/L
B
R/L
G/W(BLACK)
R/L R/BR/G L/R(GREEN)
(BLACK) (BLACK)(BLACK)(BLACK)
O Gy
B
Br/G
B Br
L/G W/G
Y/G
BYL
B
B
G
Ch Dg
BL/W
L/R
R/BB/Y
L/YSb
R/L R/B
Br/WB1G/W B/L
L/Y
W
B/L
W/B L/YB/L
W/YL/Y
L/Y
Br L
R
Br/LR
Br/L
L/W
L/Y
Br
L/W
L/Y L/B
L L/R
B L/Y
L/R LB B BB
W
WW
W
WW
B
BB
B
B B1
B
BB
B
B
B/YL/Y
B/YL/Y
R/Y
L P
B Br/WDg
ChB/YYG
L/Y
Ch
B/YDg
G
L/YY
B
R
G
B/L
YLWBYPBL
GBB/W
(BLACK)YB
BCh
(BLACK)BDg
B
(GRAY)(BLACK)
(BLACK)
(BLACK) (GRAY)
(GRAY)
(GRAY)
(GRAY) (GRAY)B/W B/L
B/L B/L
W/LP/B Y/L
R
B
PASS
(BLACK)
(BLACK)ChB
(BLACK)DgB
N
B(BLACK)B
(BLACK) (BLACK)
O/G B(BLACK) (BLACK)
L
R/L G/B
M
R/L L/B
N
R/LR/L O/B
OY
Y/R C YG/R C GBr/R C BrGy/R C Gy
R R/LRRRRY
P
RG G(BROWN)
Q
RBr Br
Gy(DARK GRAY)R(GRAY)
R
R/YLg/Y
R/Y Lg/Y R/WB/L
R/Y
R
Y/L
B
L/R
YL/R
Gy/B
Gy
G/WB1
W/Y
W1
L/R B/L
YLW/B
Y/L W/L
P/W P/LR/Y
Br/W R/W
Lg/YL/W B/W
R/L
R/B L/WW G
Lg
L/R L/BSb
B/Y B B/R L/Y
RBR
R/G
4
BL/Y
BB
Br/L
BrBrL
B
B
B
B
BR/GB1
B
Y
B
R/WR/B
R/GR/BL/RR/L
Br
G/WR/L
L/YW/BB/L
GyGy/B
R/L
L/R
L/W
B/LL
B
Br/W
Br
Y
LPWP
B2
B2
R PB
(BLACK)
B3
B3W2
Y/G L/GBr/G Br/R
Gy/R
BrBrO/B
G/Y L/B G/B G/R
Y/R
W/G Y/B R/B
O/B
R/L
L/B
GyO
O Lg/R
B
B
B
BB Gy
Gy/G Gy/G Gy/G
O/G O/GO/G
Gy GyGy/G
Br/G
W/G
Y/G
L/G
Br
WW/YB/L
L/Y
Lg/RG/Y W/YY/B
L/YBSb
Sb
R/GG/WWYChL
W
BrP
P G Y Ch Dg B
Dg
B
BBBB
B
Dg
ChBr
LR/Y
L/Y B/Y
Br/LBr/LBr/L
BrR/YR/W
B2
Gy
Gy/BB3
R/B
G/B
L/B
O/B
Gy/R
Lg/RY/R
G/R
Br/R
R/W
R/Y
Lg/Y
W1
W2
(BLACK)
(BLACK)
(BLACK)
(BLACK) (GRAY)
B
L
B
B/L
Br/W
B/LG/W
S
T
U
V W J
Z
R/G
B L/Y
W/YG/Y W Y/B
Br
G/WLg/R Lg Y
ChDg
L
gf f e dc b a` ] \[ FE DC
I
G
H
X
j k
l
m
n
op
i w
v u

t s
r qBA@Br9 5 3 2
1
Œ

 
£¢ ¤
¥
¦xy

(BLACK)
Y
L/W
Y/B
G/Y
Y/L
W/L
P/BR
B3 W/B
B/L
L
Y
P/W
P/L
Br
G/W
B/W
W/Y
Br
B2
|
~
z } {
L/Y
A
A
A
A
AA
AAAA
A C
A
A
A
A A
A
P/LP/W
BB/L BB/L
DL DL
C
W/LP/B
WIRE HARNESS SUB LEAD
B/L B/L
BB
R/L R/L L
R/L R/L L
LRR
LR
R(GRAY)
(GRAY)
WIRE HARNESS SUB LEADY/R
Br/RP/W
G/R Gy/R P/L
WYBr
PG
Gy(BLACK)
(BLACK)
WIRE HARNESS SUB LEAD HEADLIGHT AND METER SUB-WIRE HARNESS
(BLACK)
(BLACK)
WIRE HARNESS
Y W/Y G/WG/W
R/G L G/Y Dg
Br
GY
G L/YW/Y
L/Y BBr
B W Y/B Lg Lg/RCh L/R
L/R
G/Y
R/GDg
L
Lg/R
Lg
W
Y/B ChA
BC
D
D R/L D R/L D R/L D
R
B1
Br/G
W/G
Y/G
L/G
Br
L/R
1Main switch
5Battery
6Main fuse
0Relay unit
ZNeutral switch
\Fuel level indicator light
]Warning light (oil level indicator)
^Neutral indicator light
aTachometer
bCombination meter
eTurn signal indicator light
hOil level switch
iHorn
kRear turn signal light (right)
lRear turn signal light (left)
mFront turn signal light (right)
nFront turn signal light (left)
oTail/brake light
pRear brake light switch
vTurn signal switch
wHorn switch
xTurn signal relay
yFuel pump (thermistor)
|Front brake light switch
 Signaling system fuse

8 - 22
–+ELECSIGNALING SYSTEM
TROUBLE SHOOTING
• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
Check the main and signal system fuses
continuity.
Check the condition of the battery.
Check the main switch.
Check the entire signaling system’s wiring.
Check the bulbs and
bulb sockets.
Check the LED’s of
the indicator light.
Check the brake
switchs.
Replace the meter
assembly.
Check the neutral
switch.
Replace the meter
assembly. Check the relay unit.
Check the continuity of the thermistor in the fuel pump.OK
OK
OK
OK
OK
OK
OK
OK
OK
OKNo good
No good
No good
No goodReplace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.Recharge or replace.
Recharge or replace.
No goodNo good
No good
No good
No good
No good
No good
No good No good
No good OK
OK
BAD
OK Check the horn switch.
Check the horn. Replace.
Replace. Check the turn signal
switch.
Replace the turn
signal relay.
Replace the meter
assembly.
Replace the meter
assembly.
Replace the meter
assembly.Check the oil level
switch.
Replace the fuel
pump. Replace the left
handlebar switch.
Replace the
left handlebar
switch.

8 - 32
–+ELECELECTRICAL CONTROL SYSTEM
Condition code list
NOTE:
* This condition code is also displayed in the following cases:
- when the starter switch is held down for more than 4 seconds, causing the warning
light to flash
- when the ignition circuit cut-off system stops the engine or prevents it from starting
** This condition code is also displayed when the engine is operated at 5,000 r/min for at
least 30 seconds with the rear wheel at standstill.
*** This condition code is also displayed when the engine stop switch is turned to “ ”
while riding with the transmission in gear. Condition
codeCircuit Defect(s) System response
11 Camshaft sensor • No incoming sig-
nalThe ECU pairs the ignition of cyl-
inders #1 and #4 and cylinders #2
and #3. The motorcycle can be
ridden.
12* Pickup coil • No incoming sig-
nalThe motorcycle cannot be ridden.
13 Intake air pressure
sensor• Disconnected
• Short-circuitThe ECU stays set to an intake air
pressure of 760 mm Hg (29.9 in Hg).
The motorcycle can be ridden.
14 Intake air pressure
sensor hose and
negative pressure
hose• Improper connec-
tion
• Bending
15 Throttle position
sensor• Disconnected
• Short-circuitThe ECU stays set to a wide throt-
tle opening.
The motorcycle can be ridden.
16 Throttle position
sensor• Locked
21 Coolant tempera-
ture sensor• Disconnected
• Short-circuitThe ECU stays set to a coolant
temperature of 80˚C (176˚F).
The motorcycle can be ridden.
22 Intake air tempera-
ture sensor• Disconnected
• Short-circuitThe ECU stays set to an intake air
temperature of 40˚C (104˚F).
The motorcycle can be ridden.
23 Atmospheric pres-
sure sensor• Disconnected
• Short-circuitThe ECU stays set to an atmo-
spheric pressure of 760 mm Hg
(29.9 in Hg).
The motorcycle can be ridden.
41 Fall detection
switch• Disconnected The main relay stays switched off.
The motorcycle cannot be ridden.
42** Speed sensor • Incorrect signal The ECU stays set to 6th gear.
The motorcycle can be ridden.
43*** Monitored voltage • Incorrect The ECU stays set to a monitored
voltage of 12 V.
The motorcycle can be ridden.
44 ROM operation • CO emission
adjustment errorThe CO emission adjustment is
set to 0.

8 - 36
–+ELECELECTRICAL CONTROL SYSTEM
Diagnosis code list
Diagnosis
codeInspected item System responseTachometer display
(0 ~ 10,000 r/min)
00 — — —
01 Voltage The tachometer displays the volt-
age ´ 500.
Example:
If the voltage is 12.5 V, the tachome-
ter displays 12.5 ´ 500 = 6,250 r/min.0 r/min (0 V) –
10,000 r/min (20 V)
02 Atmospheric
pressureThe tachometer displays the atmo-
spheric pressure sensor signal.
Example:
If the atmospheric pressure is 760
mm Hg (29.9 in Hg), the tachometer
displays 8,000 r/min.
03 Intake air pres-
sureThe tachometer displays the differ-
ence between the minimum intake
air pressure sensor signal and the
atmospheric pressure sensor signal
after the main switch is turned to
“ON” in the diagnosis mode.0 r/min (0 mm Hg)
– 1,000 r/min
(100 mm Hg)
04 Throttle position
sensorThe tachometer displays the throttle
position sensor signal.1,300 r/min (0.68 V) –
5,900 r/min (2.93 V)
05 Throttle position
sensorThe tachometer displays the mini-
mum throttle position sensor signal.5,500 r/min (0.68 V) –
10,000 r/min (1.25 V)
06 Intake air temper-
atureThe tachometer displays the intake
air temperature signal.4,800 r/min (20˚C) –
5,700 r/min (30˚C)
07 Coolant tempera-
tureThe tachometer displays the coolant
temperature sensor signal.4,900 r/min (20˚C) –
9,200 r/min (100˚C)
08 Speed sensor The tachometer displays the speed
sensor signal when the rear wheel is
rotated by hand.0 –
09 Fall detection
switchThe tachometer displays whether
the fall detection switch is on or
whether it is off or disconnected.0 r/min (on), 8,000 r/
min (off) or 10,000 r/
min (disconnected)
10 Sidestand switch The tachometer displays whether
the sidestand switch is on or off.
The tachometer displays 0 r/min
when the sidestand is down (switch
on) and 10,000 r/min when the side-
stand is up (switch off).0 r/min (on) or
10,000 r/min (off)
11 — — —

8 - 38
–+ELECELECTRICAL CONTROL SYSTEM
17 Injector 1 for cyl-
inder #1CO, diagnosis switch box method
Before selecting a code, discon-
nect the fuel pump coupler from
the wire harness.
Within one second after the
MODE switch is released, the
main relay is turned on, and the
selected injector is operated once
every second for the next five
seconds. During this time, the
warning light lights up for 0.5
second once every second.
Test coupler adapter method
Within one second after the
engine stop switch is turned to
“ ”, the selected injector is
operated for once every second
for the next five seconds. During
this time, the warning light lights
up for 0.5 second once every sec-
ond. 18 Injector 1 for cyl-
inder #2
19 Injector 1 for cyl-
inder #3
20 Injector 1 for cyl-
inder #4
21 Injector 2 for cyl-
inder #1
22 Injector 2 for cyl-
inder #2
23 Injector 2 for cyl-
inder #3
24 Injector 2 for cyl-
inder #4
25 ~ 28 — — —
29 Condition code
record of mal-
functionsThe condition code of any fixed mal-
function is recorded in the ROM and
displayed by the tachometer. Refer
to the condition code list in “USER
MODE” for details on the condition
codes.Condition codes 11
– 44
30 ROM (Clearing
the condition
code record)Selecting this diagnosis code clears
the condition code record of mal-
functions stored in the ROM.
If an error has occurred in a sensor
signal, it was recorded in the ROM
and the tachometer displays 10,000
r/min. If no error has occurred, the
tachometer displays 0 r/min.
CO, diagnosis switch box method
Press the UP switch eight times
within four seconds to clear the con-
dition code record from the ROM.
Test coupler adapter method
Remove the rear cowling.
Disconnect the relay unit coupler
from the relay unit.
Press the start switch ten times
within four seconds to clear the con-
dition code record from the ROM.0 r/min (no error) or
10,000 r/min (errors)
When the error
record is cleared, 0
r/min is displayed.
31 ROM program
versionThe version number of the ROM pro-
gram is displayed in the tachometer. Diagnosis
codeInspected item System responseTachometer display
(0 ~ 10,000 r/min)