1998 NISSAN GT-R relay

TCS/ABS SYSTEM
Control Unit InputlOutput Signal Specifications
(Cont'd)
Terminal No.
Specifications'l
- - --
Check item (Refer-
ence)
- - -
Body
ground
-
Approx. 7V - - or higher Communication
line circuit between
TCSIABS control
unit and throttle
control unit
DKV
(throttle angle
output)
Acceleration pedal is released: approx. 1 ms (reference)
ABS warning lamp ABS warning
lamp
and circuit 4B3 warning lamp 0Nr2: Approx. OV
4BS
warning lamp 0FF72: Battery voltage (Approx. 12V)
cictuator
relay is activated (with engine running): Battery voltage
(Approx.
12V)
ktuator
relay is not activated (with fail-safe function activated and engine
70t
running): Approx.
OV
ABS warning lamp
and circuit,
ABS
actuator relay and
circuit
Actuator relay
monitor
48s
motor is running (in
CONSULT active test mode): Less than approx.
2V
4BS motor is stopped: Battery voltage (Approx. 12V)
TCS is not activated: ABS
motor, motor
relay and circuit
ABS
motor relay
Approx. 7V - -
OV I I Communication
line circuit between TCSfABS control
unit and throttle
control unit
DKR
(throttle
motor target angle
signal) Approx. 9 ms (Reference)
Front
right inlet
solenoid
Front right outlet
solenoid
4ctuator
is activated (in CONSULT active test mode), or actuator relay is
lot
activated (with fail-safe function activated and engine not running):
4pprox.
OV
4ctuator
is not activated and actuator relay is activated (with vehicle
stopped and engine running): Battery voltage (Approx.
12V)
Rear inlet solenoid
Rear outlet
sole- ABS solenoid and
circuit
Front left inlet
solenoid
Front left outlet
solenoid
Battery gnition switch
ON: Baitery voltage
(Approx. 12V) Control
unit power
supply circuit
'1: Do not force to oDen a connector terminal when usina a circuit tester for ins~ection. '2: ABS warning lamp ON: When the ignition switch is t6ned ON (before startirig the engine) or a malfunction is detected
ABS warning lamp OFF: When the engine has started (with the system in normal condition)
'3: Tire pressure must be in accordance with specification. '4: TCS OFF indicator lamp ON: When the ignition switch is turned ON (before starting the engine), a malfunction is detected,
or TCS OFF switch is turned ON TCS OFF indicator lamp OFF: When the engine has started (with the system in normal condition) and the TCS OFF switch
is off '5: SLlP indicator lamp ON: When the ignition switch is turned ON (before starting the engine) or a malfunction is detected
SLlP
indicator lamp OFF: When the engine has started (with the system in normal condition) and the TCS is inoperative

TCS/ABS SYSTEM
Control
Unit InpuVOutput Signal Specifications
(Cont'd)
Throttle control unit
Terminal No.
Specifications*
item Check
item (Refer-
ence)
Throttle angle sig-
nal Ignition switch
ON
Throttle valve is fully closed: Approx.
0.5V
Throttle valve is fully open: Approx.
4.2V
Throttle motor sen-
sor
Throttle motor angle signal Throttle
position
sensor circuit and
ECM
I
Throttle motor sen-
sor and circuit R8 Engine is idling: Approx. 4.4V
I
I Throttle motor
TCS switch signal Engine
is idling: Approx.
3.4V
lgnition switch ON: Approx. 5V
Throttle control
unit power supply angle
signal and
MA
circuit
TCS switch signal
circuit
EL
Body
jround
- - -- -- - - - --
lgnition switch ON: Battery voltage (Approx. 12V)
Throttle control
unit power supply
Throttle motor relay
Sensor battery
voltage
Throttle control
unit power supply
Throttle motor relay Throttle
control
unit power circuit @J
1
Throttle control
unit power circuit
lgnition switch
ON: Battery voltage (Approx.
12V)
Throttle motor relay and circuit
lgnition
switch ON: Approx.
OV
Throttle position
sensor power cir-
cuit
lgnition
switch ON: Approx. 5V
lgnition switch ON: Battery voltage (Approx. 12V) Throttle control
unit power circuit
lgnition switch ON: Battery voltage (Approx. 12V)
I
Throttle motor
relay
and circuit
Start signal lgnition
switch START (Disconnect ECM-TCM connector or ECM connec-
tor.): Approx.
10V
*: Do not force to open a connector terminal when using a circuit tester for inspection. Start
signal circuit
and ECM

TCSlABS SYSTEM
Control Unit InputfOutput Signal Specifications
(Cont'd)
USING CONSULT
Indicated are the controi unit computed data. If the output circuit (harness) should be open or short-
circuited, correct values may be displayed.
TCS/ABS control unit
Display
I Vehicle is stationary.
REVOLUTION SENSOR
W/hI
STOP LAMP SW [ON-OFF] Check
item (Reference)
Data monitor
the
same 'peed Wheel sensor circuit
as speedometer (within
~onttor
ltem
Wheel
speed'l
Vehicle is
driven.'l
Condition
Brake pedal is
Brake pedal is not
depressed.
Engine is stopped.
Engine is running at
more than
400 rpm.
Actuator (solenoid) is
activated (at CONSULT Specifications
Brake pedal status
-1 Engine speed signal cir-
cuit
ENG
RPM SIGNAL
[STOP-RUN] Engine operation
active test), or actuator
relay is not activated
(with fail-safe function
activated and engine not
running). Solenoid circuit
IN
ABS SOLENOID
[ON-OFF]
Solenoid status Actuator (solenoid) is
not
activated and actuator
relay
is activated (with
vehicle stopped and
engine running).
OUT
ABS SOLENOID
[ON-OFF] OFF
Actuator relay is acti-
vated (with engine run-
ning).
ABS ACTUATOR RELAY
[ON-OFF]
- Actuator relay and circuit
Actuator
relay status
Actuator relay is not acti-
vated (with fail-safe
function activated and
engine not running).
Motor relay and motor
are activated (at CON-
SULT active test).
Motor relay and motor
are not activated. OFF
I ABS
motor, motor relay
ABS MOTOR
RELAY
[ON-OFF]
Motor
relay
and motor
status
OFF and circuit
ABS warning lamp cir-
cuit
Controi unit power
sup-
WARNING LAMP
[ON-OFF]
4BS
warning lamp
sta-
:us'2
Warning lamp ON Warning lamp OFF
'ewer supply voltage
~rovided for control unit
BATERY
BOLT [V] Ignition switch ON
Acceleration pedal is not
depressed. (Ignition
switch
ON)
10 - 16V
I
Communication line cir-
cuit between TCS/ABS
control unit and throttle
I - 10096 control unit ply circuit and ground
circuit
rhrottle
angle condition
linked with acceleration
~edal)
THRTL OPENING
[%]
Acceleration pedal is
depressed. (Ignition
switch ON)

TCS/ABS SYSTEM
CONSULT for TCS/ABS Control Unit Control
System (Cont'd)
SELF-DIAGNOSTIC RESULTS MODE
Diagnostic item Diagnostic item is detected when ...
Circuit for front right wheel sensor is open. Or an abnormally high input voltage is
entered due to short to battery.
Circuit for front left wheel sensor is open. Or an abnormally high input voltage is entered
due to short to battery.
Circuit for rear right wheel sensor is open. Or an abnormally high input voltage is enterec
due to short to battery. Check
item
FR RH SENSOR
[OPEN]
FR LH SENSOR
[OPEN]
REAR SENSOR
[OPEN]
RR LH SENSOR
[OPEN] Circuit for rear left
wheel sensor is open. Or an abnormally high input voltage is entered
due to short to battery.
Front right wheel sensor is short-circuited or shorted to ground, or gap between the
wheel sensor and the sensor rotor is large. An abnormally low input voltage is entered
and input signal is abnormal.
FR
RH SENSOR
[SHORT) Wheel
sen-
sor circuit
FR LH SENSOR
[SHORTJ Front
left wheel sensor is short-circuited or shorted to ground, or gap between the wheel
sensor and the sensor rotor is large. An abnormally low input voltage is entered and
input signal is abnormal.
Rear right wheel sensor is short-circuited or shorted to ground, or gap between the
wheel sensor and the sensor rotor is large. An abnormally low input
vottage is entered
and input signal is abnormal.
Rear left wheel sensor is short-circuited or shorted to ground, or gap between the wheel
sensor and the sensor rotor is large. An abnormally low input voltage is entered and
input signal is abnormal.
Circuit for front right inlet ABS solenoid valve is open, or an output voltage is much lower
than the specified value due to short to ground.
Circuit for front
left inlet ABS solenoid valve is open, or an output voltage is much lower
than the specified value due to short to ground.
RR
RH SENSOR
[SHORTJ
RR LH SENSOR
[SHORV
FR RH IN ABS SOL
[OPEN]
FR LH
IN ABS SOL
[OPEN]
REAR IN ABS SOL
[OPEN] Circuit
for rear inlet ABS solenoid valve is
open, or an output voltage is much lower than
the specified value due to short to ground.
-
FR RH IN ABS SOL
[SHORT]
- - - -- - - - -
Circuit for front right inlet ABS solenoid valve is shorted, or an output voltage is much
higher than the specified value due to short to battery.
Circuit for front left inlet ABS solenoid valve is shorted, or an output voltage is much
higher than the specified value due to short to battery.
Circuit for rear inlet ABS solenoid valve is shorted, or an output voltage is much higher
than the specified value due to short to battery.
Circuit for front right outlet ABS solenoid valve is open, or an output voltage is much
lower than the specified value due to short to ground.
Circuit for front left outlet
ABS solenoid valve is open, or an output voltage is much lower
than the specified value due to short to ground.
FR
LH IN
ABS SOL
[SHORTJ
REAR IN ABS SOL
[SHORT] Solenoid and
circuit
FR RH OUT ABS SOL
[OPEN]
FR LH OUT ABS SOL
[OPEN]
REAR
OUT ABS SOL
[OPEN]
- --
Circuit for rear outlet ABS solenoid valve is open, or an output voltage is much lower
than the specified value due to short to ground.
Circuit for front right outlet ABS solenoid valve is shorted, or an output voltage is much
higher than the specified value due to short to battery.
Circuit for front left outlet
ABS solenoid valve is shorted, or an output voltage is much
higher than the specified value due to short to battery.
Circuit for rear outlet
ABS solenoid valve is shorted, or an output voltage is much higher
than the specified value due to short to battery.
ABS motor turns ON when control unit sends OFF signal. ABS motor circuit is open or
shorted to ground.
ABS motor turns OFF when control unit sends ON
signzl. Relay control wire is broken.
FR RH OUT ABS SOL
[SHORT]
FR LH OUT ABS SOL
[SHORT]
REAR
OUT ABS SOL
[SHORT]
ABS MOTOR
[ON FAILURE]
ABS motor,
motor relay
and circuit
ABS
MOTOR
[OFF FAILURE]

TCS/ABS SYSTEM
CONSULT
for TCSlABS Control Unit Control
System
(Cont'd)
Diagnostic item Check item
Diagnostic
item is detected when ...
ABS ACTUATOR RELAY
b~ FAILURE] ABS
actuator relay turns ON when control unit sends OFF signal. Actuator relay is short-
circuited to ground. ABS
actuator
relay and
circuit
ABS
ACTUATOR RELAY
[OFF FAILURE] ABS
actuator relay turns OFF when control unit sends ON signal. Relay control wire is
broken.
BAlTERY VOLTAGE
[VB-IiIGH] TCSIABS
control unit
power supply
and ground
circuit
TCSIABS
control unit battery voltage is abnormally high.
BAlTERY VOLTAGE
[VB-LOW TCSIABS control unit battery voltage is abnormally low.
- -
Function of calculation in TCS/ABS control unit has failed. TCSIABS
control unit
CONTROL
UNIT
ABS motor,
motor relay and circuit
ABS
MOTOR
[LOCK FAILURE] ABS
motor speed is abnormally low.
Engine speed signal is interrupted or signal wire is suspected to be broken.
TCSIABS control unit connector or ECM-TCM or ECM connector is poorly connected. Engine
speed signal circuit
ENGINE
SPEED SIG
Circuit for
the commu-
nication line
between
TCSIABS
control unit
and throttle control unit
The communication line between TCSIABS control unit and throttle control unit is open
or shorted.
Throttle control system (throttle control unit, peripheral harness, and throttle actuator)
is abnormal.
TCSIABS control unit or throttle control unit battery voltage is low.
THROTLE
POSl
SIG
Engine main components (crankshaft position sensor, mass air flow sensor, engine cool-
ant temperature sensor, ignition primary signal, throttle position sensor, and motor throttle
position sensor) are abnormal. Engine sys-
tem
ENGINE SYSTEM
Total control
signal
1
(multiple sig- nal) for
engine,
A/l
and TCSI
ABS
Total control signal (multiple signal) for engine, AIT and TCS/ABS is abnormal (open or
shorted communication harness, faulty connections, abnormal
TCS/ABS control unit or
ECM-TCM or ECM).
TCSIABS control unit power is momentarily cut off or decreased.
LAN
SIGNAL
1
Total control signal (multiple signal) for engine,
and TCS/ABS is abnormal (open or
shorted communication harness, faulty connections, abnormal
TCS/ABS control unit or
ECM.TCM or ECM).
ECM.TCM or ECM starter switch is stuck to ON.
The starter switch is ON for 10 seconds or longer even after the engine has started.
(This is not
a malfunction.)
ECM-TCM or ECM is abnormal. (Total control signal (multiple signal) for engine,
A/T
and TCSIABS is malfunctioning. Or the system is in the process of CPU back up.)
TCSIABS is abnormal. Total
control
signal
2
(multiple sig-
nal) for
engine,
PA
and TCSI
ABS
LAN
SIGNAL
2
LAN SIGNAL 3

TCS/ABS SYSTEM
CONSULT
for TCSfABS Control Unit Control
System (Cont'd)
DATA MONITOR MODE --
I ~elect-monitor item I
Display
signals Selection from
Remarks
menu
FR RH SEN
[kmlh] Displays vehicle speed computed based on
front right wheel sensor signal.
zc
FR LH SEN [kmlh] Displays
vehicle speed computed based on
front left wheel sensor signal.
AT
Displays vehicle speed computed based on
rear right wheel sensor signal.
Displays vehicle speed computed based on
rear left wheel sensor signal.
REAR
SEN
[kmlhll
RR LH SEN
lkmlhll
FIR IN SOL [ON-OFF]
I O
FIR OUT SOL [ON-OFF] /
lndicates operating condition (ONIOFF) for 87 front right inlet solenoid.
lndicates operating condition (ONIOFF) for
front right outlet solenoid.
Rs
FIL IN SOL O
A FIL OUT SOL [ON-OFF] /
lndicates operating condition (ONIOFF) for
front left inlet solenoid.
y- 13 u -:-.!
Indicates operating condition (ONIOFF) for
1 front left outlet solenoid. --
REAR IN SOL [ON-OFq / A I Indicates operating condition (ONIOFF) for
" I rear inlet solenoid.
RR OUT SOL [ON-OFF]
/
ABS ACTUATOR [ON-OFF]
- - .
O
O
0
0
ABS MOTOR [ON-OFFI I - I 0
-
lndicates operating condition (ONIOFF) for SC rear outlet solenoid.
lndicates ABS actuator relay status
(ON1
OFF). Indicates
ABS motor relay status
(ONIOFF).
Indicates stop lamp switch status
(ONIOFF).
STOP LAMP SW
[ON-OFFl
I 0 I 0
ENG SPEED SIG [RUNISTOP] I 0 I 0 0 I lndicates engine operation.
WARNING LAMP
[ON-OFF]
I - I 0 0 I lndicates ABS warning lamp status.
BATTERY VOLT
iv I
I lidicates the voltage supplied to the TCSI n
THRTL OPENING 1x1 1 0 I 0
V
0
THL OP TARGET [%I I - 1 0
ABS control unit.
Indicates throttle angle condition.
- - -
lndcates throttle control unit target angle. 0-1- -- - -- - -
lndicates the value at which fuel to ECM is
cut off.
lndicates the gear position.
lndicates TCS switch status (ONIOFF).
TCS
MODE
GEAR
1016-
0 I lndicates TCS OFF indicator lamp status.
TCS
SW [ON-OFF]*
TCS OFF LAMP [ON-OFF]
SLIP
LAMP [ON-OFF]
0 I lndicates SLlP indicator lamp status.
I I
*: The TCS switch only indicates that the switch is ON or OFF. It does not necessarily correspond to the TCS operation condi-
tion (TCS OFF indicator lamp OFF or ON).
-
0
-
-
lndicates the selector position (ONIOFF)
based on the
A/T PNP switch signal or the
neutral position switch signal.
-
0
0
0
PIN POSl SIG
[ON-OFFI
I

TCS/ABS SYSTEM
CONSULT for TCS/ABS Control Unit Control
System (Cont'd)
9. "ACTIVE TEST' screen is displayed.
ABS solenoid valve
a To check that ABS solenoid valves (inlet and outlet) ooerate in
I I I - --
': Solenoid valve stays ON for 1 to 2 seconds after touching the key, and then
turns OFF. =
the following manner, touch "UP", "KEEP" and "DOWN" on the @
screen while observing the monitor.
If the active test is conducted with brake pedal depressed, the ; <
brake pedal travel limit may change. This is a normal condition.
"TEST IS STOPPED" message is displayed 10 seconds after
Y
the operation is started. ST
a If the active test needs to be performed again after "TEST IS
STOPPED" is displayed, repeat step 8. RS
Operation
IN ABS
SN
OUTABS SN
ABS motor
Touch "ON" and "OFF' on the screen to check that ABS motor EL
relay and ABS actuator relay operate as follows:
UP
OFF
OFF
Operation ON
@
KEEP
ON
OFF
ABS actuator relay
ABS
motor relay DOWN
Ee
ON
ON'
A'
a If the active test is conducted with brake pedal depressed, the
brake pedal travel limit may change. This is a normal condition.
a "TEST IS STOPPED" message is displayed 10 seconds after
the operation is started.
ON
ON OFF
ON
OFF

TCS/ABS SYSTEM
Self-diagnosis for TCSfABS Control Unit
Control System (Cont'd)
MALFUNCTION CODE/SYMPTOM CHART I I I
75, 'I:
'2: '3: '4:
'5:
Fail-safe operation is not activated. A signal from control unit suspends TCS and ABS control operation. Brakes operate
conventionally and the vehicle operates in the same manner as a vehicle without the TCS. After specified battery voltage
resumes, the TCS
OFF indicator lamp and the ABS warning lamp go off, allowing for TCS and ABS control operation.
TCS operation only stops and fail-safe operation is activated, allowing for ABS control operation.
Malfunction is detected only when TCS is in operation.
When there are malfunctions in the self-diagnostic check terminal circuit (terminal
4 of the data link connector for CONSULT)
and SLlP indicator lamp circuit, fail-safe operation is not activated.
Some malfunctions in the
TCS/ABS
control unit cause the SLlP indicator lamp and the
ABS warning lamp to go off sepa-
rately.
Malfunc-
tion code
No.
12
21 22
25
26
31
32
35
36
41
42
45
46
55
56
57
58
61
63
71
75
80
83
84
85
86
NO indi-
cation
(no blink-
ing)
NOTE:
When the
80, 83,
84, 85 or 86 is indicated, perform the self-diaqnosis for ECM-TCM or ECM.
Check
item
Normal
Front right wheel sensor (open-circuit)
Front right wheel sensor (short-circuit)
Front left wheel sensor (open-circuit)
Front left wheel sensor (short-circuit)
Rear right wheel sensor (open-circuit)
Rear right wheel sensor (short-circuit)
Rear left wheel sensor (open-circuit)
Rear left wheel sensor (short-circuit)
Front right outlet solenoid valve and circuit
Front right inlet solenoid valve and circuit
Front left outlet solenoid valve and circuit
Front left inlet solenoid valve and circuit
Rear outlet solenoid valve and circuit
Rear right inlet solenoid valve and circuit
Battery voltage (low)
Throttle control unit system or circuit for the corn-
munication
line between TCSIABS control unit
and
throttle control unit
Actuator motor and motor relay circuit
Actuator relay circuit
TCSIABS
control
unit
Total control signal (multiple signal) for engine,
IVT
and TCS/ABS
Engine speed signal
Monitoring of total control signal (multiple signal) for
engine,
AfT and TCS/ABS
Engine system component fuel condition
Incomplete start process of total control signal (mul-
tiple signal) for engine,
AfT and TCSIABS
Continuous start process of total control signal
(multiple signal) for engine, and
TCS/ABS
Remains OFF: Data link connector circuit
Remains ON: SLIP indicator lamp circuit shorted,
TCSIABS
control unit or self-diagnostic check termi-
nal circuit open
malfunction code No. 58 is indicated, perform the Detection
Engine
running
-
0 -
0
-
0 -
0 -
0
0
0
0
0
0
0
0
0
0
0
0
-
0
0
0
0
0
0
throttle control time
In driving
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 -
0'3
0
0
0
0
0
0
unit
a Fail-safe
operation
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-'I
0
0
0
0
0
0
0
0
0
0
-'4
-'4
code Nos.
ABS
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-*2
0
0
05
-
-
-
-
-
-
-
0
self-diagnosis. Lamp
ON
TCS OFF
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-
0
When the SLlP
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0'5
0
0
0
0
0
0
-
0
malfunction