1998 NISSAN GT-R brake

ELECTRIC SUPER HlCAS
Control Unit
Input/Output Signal Specifications
(Cont'd)
USING CONSULT
The displayed output signals represent the control unit com-
puted data. If the output circuit (harness) should
be open,
correct values may be displayed.
Monitor item
VHCL SPEED SE
[km/hj
STOP LAMP SW
[ON-OFF] Data monitor
I Condition
Specification
--
STEERING ANG Steering
wheel is turned right Steering angle (degrees) mea-
[R/Ll or left. sured from neutral position
NEUTRAL SIG Steering wheel is in neutral When neutral: ON
[ON-OFF] position
or turned right or left. When
turned (right or left): OFF
Brake pedal operation Check
item
Vehicle is running or driving
wheels are turning.
Steering angle sensor circuit
Approximately
equal to speed-
ometer reading
When pedal is depressed: ON
When pedal is not depressed:
I OFF
In neutral position:
Approx.
2.4V Vehicle
speed sensor circuit
Stop lamp switch circuit
ENGINE SPEED
[r~ml
1"l I Actuator is operating in active I In right lock position:
test. Engine
is running.
Approx. 4.4V
in left lock position:
Approx.
0.4V
Rear steering angle sensing
system
Approximately
equal to tachom-
eter reading
POWER STR SOL
[A1
Wiring
in ECM-HICAS control
unit
MOTOR CURRENT
PI
Vehicle speed is changed from
0 to 100 krnh.
HlCAS RELAY
[ON-OFF]
FAILSAFE
[ON-OFF] At
0 km/h:
Approx. 1.1 0A
At
100 krn/h: Approx. 0.48A
WARNING LAMP
[ON-OFF] System related to power steer-
ing solenoid output signal
RR ST
ANG-VOL
[Vl
MOTOR VOLTAGE
[vl
Actuator is operating in active
test.
Ignition switch is ON or engine
is running.
I Power supply system for
OK
if output current is detected
during operation Motor
and its power supply
system
1 signal from control unit
When ignition
switch is ON: ON
Not in operation HICAS
motor relay
System related to relay driving
Check malfunctioning parts
using self-diagnosis and data
monitor.
Approx.
5V
When warning lamp is ON: ON
When warning lamp is OFF:
OFF
Rear steering angle sensing
system Warning
lamp circuit
Power supply voltage Motor power
supply system
C/U
VOLTAGE
[VI Control unit power supply cir-
cuit
Ignition
switch is ON or engine
is running. Power
supply voltage

ELECTRIC SUPER HICAS
Trouble Diagnosis
with CONSULT (Cont'd)
connector for
'@g SELECT DlAG MODE
SELF-DIAG RESULTS i
DATA MONITOR
ACTIVE TEST
ECM PART NUMBER
u
1 I lhil SELECT MONITOR ITEM I 1
SELECTION FROM MENU
I Il
I
START I
ACTIVE TEST PROCEDURE
After connecting CONSULT to data link connector, start the
engine.
Touch "START", "HICAS and "ACTIVE TEST".
Touch 'SIMULATE" and "SELECT MONITOR ITEM".
Turn the steering wheel right or left to make the rear actuator
operate.
Reference values in normal condition
-- -
0" (Neutral) I 2.4V I 2.4V I No (Approx OV)
Steering angle
sensor
ECM PART NUMBER
Rear steering
angle main sensor
--
R 90"
L 90"
After connecting CONSULT to data link connector, turn ignition
switch ON.
Touch "START', "HICAS" and "ECM PART NUMBER7'.
Part number printed on the control unit label and part number
shown on the CONSULT screen are as follows:
2-door model: 28505
AAI
00
4-door model: 28505 AAll 0
Trouble Diagnosis with Self-diagnosis
Rear steering
angle sub-sensor
4.4V
0.4V
DESCRIPTION
If the system detects some error while vehicle is running, it notifies
the driver of a malfunction
by turning ON the HICAS warning lamp,
and at the same time, it halts the normal control and enters the
fail-safe mode.
Motor current
SELF-DIAGNOSIS PROCEDURE
4.4V
0.4V
1. Start the engine.
2. Within 10 seconds after the engine has started, turn the steer-
ing wheel more than
20" right-to-left and repeat this
5 times or
more, and then depress the brake pedal
5 times or more.
Yes (Variable)

SERVICE DATA
SECTION SD
CONTENTS
L ] RB20DE (UB) [I 17 FS5R30A 1-
ENGINE MECHANICAL ............................................... 2 MANUAL TRANSMISSION ........................................... 10
-1 RB25DE /I
ENGINE MECHANICAL .................................................. 4
17 RB25DET I]
ENGINE MECHANICAL .................................................. 6
CLUTCH.. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . .. . . . .+.. . . . . . . . . . -8
71 FS5W71C
MANUAL TRANSMISSION
.................... ......................... 9
AUTOMATIC TRANSMISSION ........................... .......... 12
TRANSFER .............. ......... ..... .. ... ........ . . ............. 18
PROPELLER SHAFT ................................................. 19
FRONT FINAL DRIVE ................................................. 20
REAR FINAL DRIVE ..................................................... 22
DRIVE SHAFT ............................................................... 24
AXLE & SUSPENSION ................................................. 25
ROAD WHEEL AND TIRE ............................................. 27
BRAKE. ... ...... . .. ... . .... . . . . . .... . .. .. . . .. . . .. . . . .. . . .. ... .. .. . . . . . . . . .. .... . -28
STEERING ........... ............. ..... ... ............... ...... ................ 29
SUPER HICAS ............................................................ 30

AUTOMATIC TRANSMISSION
ACCUMULATOR
Accumulator spring
Spring designation
Accumulator spring
A
Accumulator spring D
BAND SERVO PISTON
Band servo piston spring
--
Free length mm
43.0
66.0
45.0
Accumulator spring B
-
- --
Parts number
31 605 41 X02
31 605 41
XI 0
31 605
4AX03
EC
31 605 4AX00
4AX03
model
Except
4AX03 model
AT
Accumulator O-ring
58.4
Accumulator Large O-ring mm
Small O-ring mm
Accumulator
spring C
31 605 41 X06
Model code
A
45
29
Spring designation
Band servo piston spring
A
Band servo piston spring B
Designation
I Reverse clutch I Hiah clutch
4AX00,4AX01
Band servo piston spring C
Model code I 4AX00 I 4AX01. 4AX03
B
50
45
4AX03
HA
Free length mm
47.6
-
CLUTCH AND BRAKE
29.7
C
50
34
Parts number
31 605 41 XI 4
-
Drive
Piate
D 0 J-J
45
29 ST
31605 41x01
Wear limit mm
Number of plates
Clearance
"7m
1 0.5 - 0.8 I 0.5 - 0.8
Free length mm
47.6
-
Number of plates
Parts number
Thickness mm
1.8 1.8
2 2
Driven plate
Thick- Thick-
I % I Parts number Parts
number
31 605 41 XI 8
- EL
29.7
-- 2 2
31 532 41
x73
31 532 41 X24
2.0 2.0
Parts number
31 605 41 XO1
Parts number
Thickness mm
Thick- ness mm 31 536 41 X20
31536 41x14
2.8 2.0
Thick-
Retaining plate

t I I
Thickness mm I 2.0 1 2.0 1 2.0
Clearance mm
Designation
Model code
Retaining plate
Driven plate
I Parts
number 1 31 536 41 X21 I 31 536 41 XI 3 I 31536 41x13
High clutch
4AX03
4
31532
41x11
1.6 1.4
7
Drive plate
Thickness 1 Pans number
mm
Number of
plates
Parts number
Thickness mm
Wear limit mm
Number of plates
Thickness mm
--
Forward clutch
Parts number
4AX00
7
31 532 41 X63
2.0
1.8
7
Thickness mm
4AX01,4AX03 6
31532 41 X63
2.0 1.8
6
Parts number
Designation
Model code
I Number of plates
Drive plate
Retaining plate Overrun clutch
4AX00,4AX01,4AX03
3
Driven plate
I Thi","~ss 1 Parts number 1 Thi","rss 1 Parts number 1 ThigEss
31 667 41 XI 7 31667 41 XI1
31667 41x12
31 667 41 XI 3
31667
41x14
31 667 41 X07
31 667 41 X08
31 667 41
XOO
31667 41x01
31 667 41 X02
31
667 41 X03
31 667 41 X04
31
667 41 XO5
Low & reverse brake
I
Parts number
4AX00
7
31532 41x69
1.6 Parts number
Thickness mm
I
31667 41x13
31
667 41
XI 4
31 667 41 X07
31 667 41 X08
31 667 41
XOO
31 667 41
XO1
31 667 41 X02
31 667 41 X03
31 667
41 X04
31 667 41 X05
31 667 41 X06
4AX01,4AX03
5
31 532 41 X69
1.6
31
532 41 X62
2.0 1.4
7
31 666 41 X02
2.0
Wear limit mm
Number of plates
Parts number
Thickness mm
Clearance mm 1.4
7
31 666 41 X02
2.0
0.5
- 0.8
1.8
5
31 536
41x10
2.0
1.0 - 1.4 0.5 - 0.8

AUTOMATIC TRANSMISSIO
Standard 0.10 - 0.25 Low one-way clutch inner race to seal ring clearance mm
Limit 0.25
OIL PUMP AND LOW ONE-WAY CLUTCH
-
TOTAL END PLAY --
Total end play mm 0.25 - 0.55 I
0.1 5 - 0.22
0.11
- 0.18 Oil pump clearance mm
Thickness mm
Inner gear and outer gear to housing
0.03 - 0.05
Standard 0.1 0 - 0.25 Oil pump cover to seal ring clearance mm , Limit 0.25
Outer
gear to crescendo
Outer gear to housing
I Parts number
Bearing race
REVERSECLUTCHENDPLAY
Reverse clutch drum end play mm 0.55 - 0.90 I
Oil pump thrust washer
ADJUSTMENT OF TANDEM BRAKE BAND TENSION
Number of turns of anchor end pin back-off I 2.375 - 2.625
Anchor end pin tightening torque N.m (kg-m) 4.0 - 5.8
(0.4 - 0.6)
TIGHTENING TORQUE
Unit: N.m (kg-m)
Lock
nut tightening torque N-m
(kg-m)
Transmission to engine mounting bolt
41 - 50 (4.1 - 5.2)
I TIM side to engine side I 40 - 49 (4.0 - 5.0) - - - - - - -- - - - - - -
I Engine side to TIM side I 30 - 39 (3.0 - 4.0)

BRAKE
BRAKING FORCE
More than 10% of axle
weight
REAR DlSC BRAKE
Total braking force of rear wheels
Variation between right and left of
each wheel Brake
type
Less than 8% of axle weight ADllVC
9.3
Brake
pad
Disc rotor
Total
braking force OPZ11V
11.5
Standard
thickness (New) mm
Wear limit of thickness mm
Standard thickness (New) mm
Wear limit of thickness mm
Runout limit mm
More than 50%
of vehicle
weight at inspected
Note: The braking force when both front wheels are locked up can be considered to meet the total braking force.
2.0
16
14
BRAKE PEDAL
18
16
PARKING BRAKE
Free play (at pedal top surface)
mm I 3 - 11 Less than
0.07 Type DS17HD I
Brake
lining
Depressed pedal height under force
of 490 N (50 kg)
(from dash panel top surface)
mm
Brake
pedal height
(from dash panel top surface)
mm
Standard inner diameter
I (New) mm I
Standard thickness (New) mrn
Wear limit of thickness
mm M/T: 163 - 173 IVT: 170 - 180
172 dia. 3.0 1.5
M/T: More
than 85 A. More than 90 . . Drum I
I
Wear limit of inner diameter
mm I 173 dia.
Clearance between the edge of stop
lamp switch screw and pedal stopper
mm Operating
stroke
[under force of 196 N (20
kg)] 5 - 7 notches
CHECK VALVE I
I
Maximum stroke
19 notches
Number of notches when brake warning
lamp turns on
TIGHTENING TORQUE
Unit: N.m (kg-m)
Within 1 notch
Vacuum leakage
[at
vacuum Of 66'7 kPa (-500 mmHg)]
BRAKE BOOSTER
Within 1.3 kPa (10 mmHg) of
vacuum for 15 seconds
Master cylinder fixing nut
I 12 - 14 (1.2 - 1.5)
Vacuum leakage
[at vacuum of 66.7
kPa
(-500
mmHg)l
Within 3.3
kPa
(25
mmHg)
of
vacuum for 15 seconds Front
caliper mounting bolt
Brake tube flare nut -- - 152 - 154 (15.5 - 15.8)
15
- 17 (1.5 - 1.8)
FRONT DlSC BRAKE
Input rod standard length at installed
mm
Brake type
I AD25VB I CUSVD [OPZ~~VC
140
Standard thickness
Wear limit of
thickness
Standard thickness
mm
1 22 1 26 1 30
Disc rotor Wear limit of
thickness
Runout
limit Less than 0.07