ESP YAMAHA YZF-R7 1999 User Guide

8 - 2
–+ELEC

SWITCHES
EB801000
SWITCHES
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.
CAUTION:

Never insert the tester probes into the cou-
pler terminal slots
1
. Always insert the
probes from the opposite end of the cou-
pler, taking care not to loosen or damage
the leads.
NOTE:

• Before checking for continuity, set the
pocket tester to “0” and to the “
W

´
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 illus-
tration.
NOTE:

“ ” indicates a continuity of electric-
ity 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 blue/red and
red when the switch is set to “ ”.
There is continuity between blue/red and
blue, between brown/blue and red, and
between blue/yellow and blue/black when
the switch is set to “ON”.
Pocket tester
90890-03112
ONR
Br/LL/YL/B
OFF
ab
Br/L
L/B R
L/Y

8

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 - 6
–+ELECCHECKING THE BULBS AND BULB SOCKETS
CHECKING THE CONDITION OF THE BULB
SOCKETS
The following procedure applies to all of
the bulb sockets.
1.Check:
• bulb socket (for continuity)
(with the pocket tester)
No continuity ® Replace.
NOTE:
Check each bulb socket for continuity in the
same manner as described in the bulb sec-
tion; however, note the following.
t t t t t t t t t t t t t t t t t t t t t t t t t t t t
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If
any of the readings indicate no continu-
ity, replace the bulb socket.
s s s s s s s s s s s s s s s s s s s s s s s s s s s s
CHECKING THE LEDs
The following procedure applies to all of
the LEDs.
1.Check:
LED (for proper operation)
t t t t t t t t t t t t t t t t t t t t t t t t t t t t
a. Disconnect the meter assembly coupler
(meter assembly side).
b. Connect two jumper leads 1 from the
battery terminals to the respective cou-
pler terminals as shown.
WARNINGWARNING
• A wire that is used as a jumper lead must
have at least the same capacity of the
battery lead, otherwise the jumper lead
may burn.
• This check is likely to produce sparks,
therefore make sure that no flammable
gas or fluid is in the vicinity.
c. When the jumper leads are connected to
the terminals the respective LED should
illuminate.
Does not light ® Replace the meter
assembly.
s s s s s s s s s s s s s s s s s s s s s s s s s s s s
Pocket tester
90890-03112

8 - 30
–+ELECELECTRICAL CONTROL SYSTEM
ELECTRICAL CONTROL SYSTEM
The YZF-R7 features an electrical control system with the following modes:
• user mode
• diagnosis mode
• CO emission adjustment mode
NOTE:
The vehicle is normally in user mode. Special tools are needed to switch to a diagnosis mode
or to the CO emission adjustment mode.
USER MODE
• If a circuit is defective, setting the main switch to “ON” (without starting the engine) will
cause the corresponding condition code to be displayed by the tachometer, the warning
light to light up, and the engine trouble symbol to blink. When the engine is started, the
condition code is no longer displayed and the engine speed appears.
• Normally, when the main switch is set to “ON”, the warning light comes on for 1.4 seconds
and then goes off. The warning light also comes on while the start switch is pushed.
• When the engine is not running, the warning light flashes once every 0.16 second if the start
switch is pushed under the following conditions.
• The fall detection switch switches off the main relay.
• Ignition is cut off by the sidestand switch.
• The injector operating voltage decreases to 3 V or less, or the main relay malfunctions.
• The pickup coil is defective.
• The fall detection switch is defective.

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–+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 - 34
–+ELECELECTRICAL CONTROL SYSTEM
Operation after entering the diagnosis
mode
• Select a diagnosis code by holding down
the MODE switch while pressing either
the UP or DOWN switch. Refer to the diag-
nosis code list.
First, press the UP switch once to select
diagnosis code 01 or press the DOWN
switch once to select diagnosis code 31.
Afterwards, each press of the UP switch
or the DOWN switch respectively
increases or decreases the diagnosis code
number by one. If diagnosis code 00 is
selected, pressing the DOWN switch once
selects diagnosis code 31. If diagnosis
code 31 is selected, pressing the UP
switch once selects diagnosis code 00.
• Release the MODE switch to start the test
for the selected diagnosis code.
NOTE:
To select another diagnosis code, hold
down the MODE switch and press either the
UP switch or the DOWN switch.
Example:
First, select diagnosis code 29 in either of
the following ways.
• Hold down the MODE switch, press the
UP switch 29 times, and then release the
MODE switch.
• Hold down the MODE switch, press the
DOWN switch 3 times, and then release
the MODE switch.
Next, select diagnosis code 10 in either of
the following ways.
• Hold down the MODE switch, press the
UP switch 13 times, and then release the
MODE switch.
• Hold down the MODE switch, press the
DOWN switch 19 times, and then release
the MODE switch.

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–+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 - 37
–+ELECELECTRICAL CONTROL SYSTEM
12 Main relay CO, diagnosis switch box method
Within one second after the
MODE switch is released, the
main relay is switched on once
every second for the next five
seconds. During this time, the
warning light lights up as long as
the relay is switched on.
Test coupler adapter method
Within one second after the
engine stop switch is turned to
“ ”, the main relay is switched
off, then on again. The warning
light lights up while the relay is
switched off.
13 Ignition coil for
cylinder #1CO, diagnosis switch box method
Within one second after the
MODE switch is released, the
ignition coil for the selected cylin-
der is operated once every sec-
ond 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 ignition coil for the
selected cylinder 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. 14 Ignition coil for
cylinder #2
15 Ignition coil for
cylinder #3
16 Ignition coil for
cylinder #4 Diagnosis
codeInspected item System responseTachometer display
(0 ~ 10,000 r/min)

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)