sensor NISSAN GT-R 1998 Workshop Manual

TROUBLE DIAGNOSES
CONSULT (Cont'd)
DATA MONITOR MODE (M)
1 I Monitor item
I
tem Display ECU
input Main
signals
-
Description Remarks
signals
VHCUS
SE.A'T
[kmlh] or [mph]
I-
Vehicle speed computed from When
racing engine in "Nn or "P" signal of revolution sensor is position
with vehicle stationary,
displayed. CONSULT
data may not indicate
0 kmlh (0 mph).
Vehicle speed computed from Vehicle
speed display may not be
signal of vehicle speed sensor accurate under approx. 10 kmlh
is displayed. (6 mph). It may not indicate 0
kmlh (0 mph) when vehicle is sta-
tionary.
Throttle position sensor signal
voltage is displayed.
AlT fluid temperature sensor
signal voltage is displayed.
Signal voltage lowers as fluid
temperature rises.
Source voltage of TCM is dis-
played.
Engine speed, computed from Engine speed display
may not be
engine speed signal, is
dis- accurate under approx. 800 rpm.
played. It
may not indicate
0 rpm even
when engine is not running.
Turbine revolution computed Error
may occur under approx.
from signal of turbine revolution 800 rpm and will not indicate
0
sensor is displayed. rpm even if engine is not running.
ONIOFF state computed from
signal of overdrive control SW
is displayed.
ONIOFF state computed from
signal of PIN position SW is
displayed.
ONIOFF state computed from
signal of
R position SW is dis-
played.
ONIOFF state computed from
signal of D position SW is dis-
played.
ONIOFF status, computed from
signal of 2 position SW, is dis-
played.
signal of
1 position SW, is dis-
displayed. ASCD is mounted.
ON
... Cruising state
OFF ... Normal running state
Vehicle
speed sensor
1 (All) (Revolution sensor)
Vehicle speed sensor
2 (Meter) VHCUS SE,MTR
[kmk] or
[rnph]
Throttle position sensor
ITHRTLPOS SEN
I ,
AT fluid temperature sensor
PI
FLUID TEMP SE
Battery voltage
A
Engine speed ENGINE SPEED
[rpml
Turbine revolution sensor
TURBINE REV
[rpml
I
Overdrive control switch
OVERDRIVE SW
[ONIOFFJ
I
PIN position switch
PIN POSI SW
[ONlOFF]
R position switch
R POSITION SW
[OWOFF]
I
2 position switch
1
2 POSITION SW
[ONIOFF]
I
D position switch
1 position switch 1 POSITION SW
[ONIOFF]
I
D POSITION SW
[ON/OFF] X
ASCD OD cut signal
ASCD.OD CUT
[ONIOFF]
X
ASCD cruise signal
Status of ASCD OD release
signal is displayed.
ON
... OD released
OFF ... OD not released
ONIOFF status, computed from
signal of
kickdown SW, is dis-
played.
ONIOFF status, computed from
signal of HOLD shift SW, is dis-
played.
ONIOFF status, computed from
signal of closed throttle position
SW, is displayed.
ONIOFF status, computed from
signal of wide open throttle
position SW, is displayed.
ASCD.CRUISE
[ONIOFF]
This
is displayed even when no
ASCD is mounted.
This is displayed even when no
kickdown switch is equipped.
Kickdown
switch
KICKDOWN
SW
[ONIOFq
Wide open throttle position switch X .
X A/T mode switch
t
WIO THRUP-SW
[ONIOFq POWERSHIFT SW
[ONIOFF]
Closed
throttle position switch
, CLOSED THUSW
[ONIOFF]

TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
\ I1 // \ 11 // =-I= or =mj= // 11 \ // 11 \
1, = 2.5 sec. t, = 2.0 sec. t, = 1.0 sec.
RB20DE 10 judgement flashes.
Stan signal Malfunctioning unit and circuit I
Except RBPODE 13 judgement flashes.
signal Malfunctioning unit and circuit I
POWER INDICATOR LAMP OR DUAL MATIC A/T
WARNING LAMP INDICATION
If malfunction occurs in electrical system, indicator lamp stays on
longer at corresponding circuit.
Flashing
order
t5 1 Overrun clutch solenoid
1
2
3
4
5
7 1 Lock-up solenoid
Malfunctioning
unit and circuit
Vehicle speed sensor
1
Vehicle speed sensor 2
Throttle position sensor
Shift solenoid
A
Shift solenoid B
I
W fluid temperature sensor, TCM power supply, or throttle posi-
tion sensor power supply
RB20DE
9 1 Engine speed
signal Except
RB20DE
10 1 Line
pressure solenoid I Turbine sensor
I - I Line pressure solenoid
12 1 - I Total control signal
When indicator lamp repeats flashing in 4 Hz, the following malfunctions
may exist: (Insufficient memory backup
powerflCM repiacement1Battery
has been disconnected for prolonged
periodllow battery power)
13
No flashes
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
To facilitate cause investigation of malfunction that is less likely to
reappear, the TCM always stores self-diagnostic results during cus-
tomer operation. This memory cannot be erased even if ignition
switch
is turned ON and OFF repeatedly. To erase the seif-diag-
nostic
results, turn ignition switch
OFF after self-diagnosis has
been performed, or use
"ERASE" function of CONSULT.
- - - - Shift control unit
PNP switch, idle
switch/full switch
Overdrive control switch Stop lamp switch

TROUBLE DIAGNOSES
Symptom Chart
Sharp shock in Engine brake
applied
Shifting
Malfunctions
Slip
(Racing)
hifting
.- erator pedal
Shifting
Shifting
inspection item
Fluid level and status
Control linkage
PNP switch (short/open circuit)
Throttle ~osition sensor (installed)
I Vehicle weed sensor
I Enaine meed sensor
A/T fluid temperature sensor
Engine idle speed
Line
Dressure
Control valve assembly
Shift solenoid
A
Shift solenoid B
Line pressure solenoid
Lock-up solenoid
Overrun clutch solenoid
Accumulator N-D
Accumulator
1-2
Accumulator 2-3
Accumulator 3-4 (N-R) Ignition coil and starter motor
Overdrive control switch
I AfT mode switch (AUTO)
Torque converter
1 Oil pump
I Reverse clutch
I High clutch
I Forward clutch
I Forward one-wav clutch
I Overrun ciutch
1 Low one-wav clutch
I Low reverse brake
Brake. band (including servo)
Parking linkage

Symptom Chart (Cont'd)
Greater noise
Malfunctions
Inspection item No shifting
I Shifting I
Fluid level
and status 11
Control linkage
-
(I) C 0 .- c. .- (I) 0 a
v
-CU
n - 1
PNP switch
(shortlopen
circuit)
Throttle position sensor (installed)
2 2
Vehicle speed sensor
I Engine speed sensor -
-T
L o 1 Control valve assembly .- - -- Shift solenoid A 4 3
. ' Shift solenoid 6 4 cut I1
--, Line pressure solenoid .- 5 -t Lock-up solenoid ?
6 Overrun clutch solenoid 3
Accumulator N-D
1 Accumulator 1-2 I 1-
Accumulator 2-3
Accumulator 3-4 (N-R)
Ignition coil and starter motor
I Overdrive control switch I 1-
A/T mode switch (AUTO)
A/T mode switch (POWER) I - I Ail mode switch (SNOW) I
I Torque converter I I
1 Oil pump I I -- - - Reverse clutch 0 -
'g High clutch a 4 6
%I Forward clutch I I - .- a Forward one-way clutch -
$ Overrun clutch a, 8
Low one-way clutch
O Low reverse brake 7
Brake band (including servo) 7
Parking linkage

TROUBLE DIAGNOSES
Symptom Chart (Cont'd)
xi - - ([I C V) a, C .- cn C W
t 0 .- .L 2 a, - 8 0 ([I L 0 0 Q
& 0 a, a, Q V)
5 E .- X
i! L a
zl -I - 1 -
- 2 -
-
-
-
-
-
5 - 3 - 4 -
-
-
-
-
-
-
-
-
-
-
-
-
I1 - 0 - 6 - 7 -
-
-
-
-
9 - 8 -
-
vj c 0 .- - .- V) 0 n
Q 7J C ([I
t C .- r ([I c. V) c. 0 C V) a 0 7J 0, C .- 0 C W -
- 2 - 3 -
-
- -
-
1 -
-
-
-
- - a +- ([I a a, 2 0 c. 0 C V) a, 0 u a, - 0 2
8 - 1 -
-
-
-
-
-
-
-
2 - 3 -
-
-
-
-
-
-
-
-
-
-
- I
i
g
- 4 -
-
-
-
-
-
-
B- ; 2 to a =? - 0,
2 5.j c 2.z 2 a0 - 0- z & 5 0 gE V) V)o C 02 .s nu 5 ng %-([I C O c --t .- V) a V) r aa ([I z gz a, a- c 50 -6 s
6 $2
11
2
I
I
Malfunctions
Inspection item
I I I Fluid level and status I I Control linkage 2
PNP switch (shortfopen circuit) 1 I I I Throttle position sensor (installed) 111213
Vehicle speed sensor
214
Engine speed sensor L -
AIT fluid temperature sensor
Engine idle weed
Line pressure
Control valve assembly
Shift solenoid A 3
3
Shift solenoid B 4 4
Line pressure solenoid
Lock-up solenoid
Overrun clutch solenoid
u I I I -
Accumulator N-D I I 1 I Accumulator 1-2
Accumulator 2-3 I Accumulator 3-4 (N-R)
Ignition coil and starter motor
Overdrive control switch
Torque converter
tg Reverse clutch .- High clutch
2 Forward clutch C .- a Forward one-way clutch -.
$ Overrun clutch 0, 8
? Low one-way clutch 3= O Low reverse brake 9
Brake band (including servo)
Parking linkage

ANTI-LOCK BRAKE SYSTEM
Fail-safe Function
If any malfunction is detected in the system, the ABS warning lamp
in the instrument panel is turned on with the ABS deactivated and
the vehicle's brake system reverts to normal operation.
System Diagram
ABS control uni: Actuator
Front lefl wheel sensor
Rear wheel Sensor Front
right inlet solenoid valve 1 I -
L ' Data ltnk connector
for CONSULT
Front right outlet solenold valve
Front lett rnlet solenoid vJve
Front left cutlet solenoid valve
r i Rear inlet solenold valve
Contrd
circuit I
Rear outlet solenoid valve
-A Motor (motor relay)
-- Actuator relay
Faii-safe
circuit
TrO~ble
diagnos~s
circuit ABS
warning lamp

ANTI-LOCK BRAKE SYSTEM
Circuit Diagram
To combination meter
I Stop lamp SW
I ABS wamlng lamp i
stop lamp 9
Wheel
sensor i connector &
FL
FR
Rea Motor relay
. FIL - 8 30A
I 11: Actuator
relay I
ABS CIU
To data link connector for CONSULT 1 RX "8 - 12
FR OUT SN fm
Rear OUT SN
Rear IN SN
27 10 ABS actuator :
ABS actuator connector
-
ABS CN connector

ANTI-LOCK BRAKE SYSTEM
Component
Parts Location
Master
Front
Booster /'
ear wheel sensor
@ ABS control unit
right wheel sensor
Front left wheel
sens&
-/
a ABS actuator
Front right wheel sensor connector
.. .
!a In the instrument panel on
LH side of engine compartment dR/Y A

ANTI-LOCK BRAKE SYSTEM
ABS control unit connector
Terminal No.
Control Unit InputlOutput Signal Specifications
USING CIRCUIT TESTER
To perform the following inspection, the ignition switch should be
turned
ON with ABS control unit connector and actuator connector
properly connected.
Item Specifications*l
Battery Ignition switch ON: Battery voltage (Approx. 12V)
Brake pedal is depressed: Battery voltage (Approx. 12V)
Stop lamp signal
Brake pedal is not depressed: Less than approx.
2V
ABS motor is running
ABS motor relay (in
CONSULT active test mode): Less than approx.
2V
ABS motor is stopped: Battery voltage (Approx.
12V)
Actuator relay is activated (with engine running): Less than approx. 2V
Actuator relay Actuator
relay is not activated (with fail-safe function activated and engine
not running): Battery voltage (Approx. 12V)
Actuator relay is activated (with engine running): Battery voltage (Approx.
Actuator relay 1 2V)
monitor Actuator
relay is not activated (with fail-safe function activated and engine
not running): Approx. OV
Front
right inlet
Actuator is activated (in CONSULT active test mode), or actuator relay is
solenoid not activated (with fail-safe function activated and engine not running):
Rear inlet solenoid Approx. OV
Front
left inlet Actuator
is not activated and actuator relay is activated (with vehicle
solenoid stopped
and engine running): Battery voltage (Approx. 12V)
ABS motor is running (in CONSULT active test mode): Battery voltage
ABS motor monitor (Approx. 12V)
ABS motor is stopped (with ignition switch
ON): Approx. OV
ABS warning lamp
ON'2:
Approx. OV
ABS warning lamp
ABS warning lamp
OFF'2:
Battery voltage (Approx. 12V)
Front right wheel
sensor Wheels are turning (Approx. 30
krn/h)*3: Pulse generates.
Front: Approx. 200
Hz
sensor
Rear: Approx. 400 Hz
Front right outlet
Actuator is activated (in CONSULT active test mode), or actuator relay is
not activated (with fail-safe function activated and engine not running):
Rear outlet
sole-
Approx. OV
I lUlU / Actuator is not activated and actuator relay is activated (with vehicle Front left Outlet stopped and engine running): Battery voltage (Approx. 12V)
solenoid
'1:e
to
tooen
a connector terminal when
using a circuit tester for inspection. Control
I
unit
power
supply circuit
ST
Stop lamp switch
and circuit
ABS motor, motor
R8
relay and circuit
ABS actuator relay
and circuit
pL
ABS warning lamp
and circuit, ABS
actuator relay
SD monitor circuit
ABS solenoid and
circuit
ABS motor monitor
circuit
ABS warning lamp
and circuit
Wheel sensors and circuit
ABS solenoid and
circuit
'2: ABS warning lamp ON: When the ignition switch is turned ON (before starting the engine) or a malfunction is detected ABS warning lamp OFF: One second after the ignition switch is turned ON (with the system in normal condition) *3: Tire pressure must be in accordance with specification.

ANTI-LOCK BRAKE SYSTEM
Control Unit InputfOutput Signal Specifications
(Cont'd)
USING CONSULT
Indicated are the control unit computed data. If the output circuit (harness) should be open or short-
circuited, correct values may be displayed.
Check item (Reference)
Data monitor
Display Condition
Monitor
item
Specifications
Vehicle is stationary.
I 0 kdh
FR RH SENSOR
FR LH SENSOR
RR SENSOR
[kdh]
Virtually the same speed
as speedometer (within
+I 0%)
Wheel sensor and circuit
Wheel speed
Vehicle is
drivem'l
Brake pedal is
depressed. Stop lamp switch and
circuit
STOP
LAMP SW
[ON-OFF] Brake pedal status
Brake pedal is not
depressed. OFF
-- --
Actuator (solenoid)
is
activated (at CONSULT
active test),
or
actuator relay is not
activated (with fail-safe
function activated and
engine not running).
FR
RH IN SOL
FR
LH IN SOL
REAR IN SOL
[ON-OFF]
ABS solenoid and circuit
Solenoid status
FR RH OUT SOL
FR
LH OUT SOL
REAR OUT SOL
[ON-OFF]
-- -- - -- -
Actuator (solenoid) is not
activated and actuator
relay is activated (with
vehicle stopped and
engine running).
Actuator relay is acti-
vated (with engine run-
ning).
Actuator relay is not acti-
vated (with fail-safe
function activated and
engine not running).
ABS actuator relay and
circuit
OFF
ON
OFF
ACTUATOR
RLY
[ON-OFF] Actuator
relay status
Motor relay and motor
are activated (at CON-
SULT active test). ABS
motor, motor relay,
and circuit
MOTOR
RLY
[ON-OFF] Motor
relay and motor
status Motor relay and motor
are not activated. OFF
ABS warning lamp and
circuit
- -
Waming lamp ON'2 1 ON
WARNING LAMP
[ON-OFF] ABS
warning lamp sta-
tus
Power supply voltage
provided for control unit -- -
Warning lamp OFF'2 1 OFF
Control unit power sup-
ply circuit - -
BAlTERY VOLT [V] Ignition switch
ON
'1: Tire pressure must be in accordance with specification. "2: ABS warning lamp ON: When the ignition switch is turned ON (before starting the engine) or a malfunction is detected ABS warning lamp OFF: One second after the ignition switch is turned ON (with the system in normal condition)