1998 NISSAN GT-R steering

ELECTRIC SUPER HlCAS
Trouble Diagnosis
with CONSULT (Cont'd)
Diagnostic item
MOTOR OUTPUT
[NO
CURRENTJ(.d)
MOTOR OUTPUT
[OVERCU
RRENTl(.e)
MOTOR OUTPUT
[MOTOR
LOCK](.
b)
VEHICLE SPEED SEN
[RAPD SIGN CHANGE21
VEHICLE SPEED SEN
[NO
SIGNAU]
VEHICLE SPEED SEN
[NO SIGNAL31
CONTROL UNIT
[ABNORMAL
1-61
Diagnostic item is detected when ... I Remarks
When motor output is kept OFF, a current is
flowing.
When motor output is kept ON, an overcurrent
is flowing.
Signal from rear steering angle sensor does
not change for a certain period of time while a
motor current of
17A or more is flowing.
When vehicle is running, vehicle speed signal
is not sensed for a certain period of time after
it has changed rapidly.
"VEHICLE SPEED SEN [RPD SIG CHG2J"
has occurred previously, and vehicle speed
signal is not sensed for a certain period of
time.
I
'VEHICLE SPEED SEN [RPD SIG CHG2]" I I
has not occurred previously, and vehicle
speed signal is not sensed for a certain period
of time while the vehicle is running at
1,500
rpm of engine speed.
Control unit is malfunctioning.

ELECTRIC SUPER HtCAS
Trouble Diagnosis with CONSULT (Cont'd)
DATA MONITOR MODE
1 Monitor item (
Display
Main Menu - -
/ item I item 1
Remarks
VHCL SPEED SE (kmh) 1 0 I 0 I Shows a value calculated from vehicle speed sensor signal.
STEERING ANG After
battery has been disconnected and connected again, an
abnormal value is shown until neutral position
(0") is detected.
NEUTRAL SIG (ON-OFF)
( 0 ( 0 I Shows whether steering wheel is in neutral position (ONIOFF).
STOP
LAMP SW (ON-OFF) I 0 I 0 I Shows whether stop lamp switch is ON or OFF.
ENGINE SPEED Shows the engine speed caicuiated from crankshaft position sen-
sor signal.
1 I I
RR ST ANG.MAI (V) I 0 I 0 I Shows the output voltage from rear steering angle main sensor.
POWER STR SOL
RR
ST
ANG.SUB
(V)
Shows the control
unit's control current for power steering sole-
(')
' ' 1 noid. -- - - -- - -
MOTOR CURRENT (A) I 0 I 0 I shows the control unit's control current for HICAS motor relay.
0
HlCAS RELAY (ON-OFF) / 0 I 0 I Shows whether HlCAS motor relay is ON or OFF.
FAILSAFE
(ON-OFF)
I 0 I 0 I Shows whether fail-safe function is in operation (ONIOFF).
0
WARNING LAMP (ON-OFF) I Q I 0 ) Shows the control unit3 ON-OFF status of HlCAS warning lamp.
Shows the output
voltage from rear steering angle sub-sensor.
Shows the power supply voltage from HICAS control unit to rear
steering angle sensor.
CIU VOLTAGE (V) ( 0 I 0 I Shows the power supply voltage to HICAS control unit.
MOTOR VOLTAGE Shows the power supply voltage
from HICAS
control unit to
HlCAS motor.
- -- - -- VOLTAGE (V) I - I 0 I Shows the measured value by voltage probe.
PULSE Shows the measured
value by pulse probe.
If measurement
is
(mi, Hi and %I 1 - / 0 1 impossible, "#" appears. The "#" mark is shown also on the left of
final data until measurement is completed.

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)

ELECTRIC SUPER HICAS
Trouble
Diagnosis with Self-diagnosis (Cont'd)
DIAGNOSTIC ITEM INPUT
1. Move the vehicle one or two meters at a very low speed.
2. Turn the steering wheel more than 20" right-to-left once or
more.
Example: Motor power supply and steering
angle neutral signal are abnormal.
1s ,
2H z
ON
OFF
/ r Second / / I I display
Tens Units Tens
Units starts.
Example: Motor power supply and steering
angle neutral signal are abnormal.
1s- ,
0.8s A - ,2S , ,1.8S -
ON I-- '1 7, OFF- -.-- -
5s 55 1s 1.8s v".2S I_
/ -j- &lnd,
display
Tens Units Tens Units starts.
/
(12) (23) STE0109D
DISPLAY OF SELF-DIAGNOSTIC RESULTS
The results of self-diagnosis are shown by flash patterns of HlCAS BR
warning lamp.
Display when past data shows that fail-safe function
has been activated previously
Only an abnormal item is indicated by the pattern shown in the ~8 left figure. The pattern is repeated.
Display when past data shows that fail-safe function
has not been activated previously EL
If all items are normal, HlCAS warning lamp flashes at a fre-
quency of
4 Hz. sD
If system is in fail-safe mode, only an abnormal item is indi-
cated by the pattern shown in the left figure. The pattern
is
repeated.
MALFUNCTION CODE CHART
Malfunction code No. 1 Diagnostic item
11 I Control unit
2
1 [ ~ze speed signal
12
13
22 I Steering angle signal
Motor
power supply
Motor output --
23 ]Steering angle neutral signal
24 I Rear steering angle main sensor signal
2
5 I Rear steering angle sub-sensor signal
33
I Engine speed signal
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
If past record shows that fail-safe function has been activated
previously, use CONSULT, or leave the battery disconnected for
more than
30 minutes to clear the memory.

ELECTRIC SUPER HICAS
Symptom Chart
Diagnostic item
Self-diagnosis CONSULT
-
Mal-
func- tion
code No. Diagnostic
item Diagnostic
item
Control unit CONTROL
UNIT [ABNORMAL
1-61
MOTOR VOLTAGE [LOW VOLTAGE](-a)
Motor power
supply
MOTOR VOLTAGE [BAD
OBSTRCTJ(.b)
MOTOR OUTPUT [ABNORML
SIG](.a)
- - MOTOR OUTPUT [MOTOR LOCq(-b)
MOTOR OUTPUT [REV
CURRENT](-C)
Motor
output
MOTOR OUTPUT [NO CURRENT(-d)
MOTOR OUTPUT
[OVERCURRENTI(-e)
CODE
54 - - VEHICLE SPEED SEN [NO SIGNAL21
Vehicle
speed signal VEHICLE
SPEED SEN [NO
SIGNAL31
VEHICLE SPEED SEN [SIGNAL
TURNJ(.b)
VEHICLE SPEED SEN [RPD SIG
CHG21
STEERING ANGLE SEN [NO ANG
SIG](.a)
Steering
angle signal
STEERING ANGLE SEN [ANG SIG FIXJ(.~)
STEERING ANGLE SEN [ANG
FIX30°](-g)
- - -- -- - - STEERING ANGLE SEN [NO NEUT
SIG](-b)
STEERING ANGLE SEN [NEUT SIG
OFFI(4
cg Steering
angle neutral
signal STEERING ANGLE
SEN [NEUT
SIG
ONI(.d)
STEERING ANGLE SEN [OFFSET
NEUTJ(-f)
RR ST ANGLE SENSOR [MAIN
SIGNAL](-a)
Rear
steer-
ing angle
main sensor
signal
- RR ST ANGLE SENSOR [ABNORML
VOL](.d)
RR
ST ANGLE SENSOR [OFFSET SIG](.c)
Rear steer-
ing angle
su
b-sensor
signal RR
ST ANGLE SENSOR [SUB
SIGNAL](.b)
RR ST ANGLE SENSOR [ABNORML
VOL](.d)
RR ST ANGLE SENSOR [OFFSET
SIGJ(C)
ENG REV SIGNAL [ABNORMAL SIGNAL]
Engine
speed signal

ELECTRIC SUPER HICAS
Symptom Chart (Cont'd)
Diagnostic item
Self-diagnosis CONSULT
-
Mal-
f unc-
tion
code No.
Cannot enter self-diagnosis mode. Diagnostic item
HICAS warning lamp is not tumed ON by switching the ignition
3N.
IICAS warning lamp is turned ON by switching the ignition ON but
s not turned OFF by starting the engine.
llumination of HICAS warning lamp has occurred after engine
;tarted. Diagnostic
item
Steering effort does not change with vehicle speed.
rhere is an abnormal noise.
Self-diagnosis with CONSULT displays
"CODE54".

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

ENGINE MECHANICAL I RB~ODE (UB) ]
STANDARD AND REPAIR LIMIT
Firing order I 1-5-3-6-2-4
Compression pressure
MPa
(kg/cm2)/rpm
Distortion limit mm
- - -- --- - Ignition advance device
Electronically-controlled ignition advance
Engine
oil capacity
e
Spark plug standard
Limit
. Limit
of variation between cylinders
Intake manifold
Intake manifold collector
Exhaust manifold
Cylinder head
Cvlinder block
lgnition timing (during no feed back control) 1.23
(1 2%)/300
0.93 (9.5)1300
0.1 (1.0)/300
0.1 0.1
0.3
0.2
0.1
Without filter
With filter
MakerlTypeISpark
plug gap mm
Engine idling speed
W'
Idle base speed (during no feed back control)
rPm
Density of
COIHC at idling speed
Wppm Approx.
3.8
Approx. 4.2
NG WPFR5G-11 11.0
- 1
-1
650-.50
(N or P position for
A/T)
600 (N or P position for AlT)
Less than O.l/Less than 50
I New I Used I Limit
Valve
clearance
(INTIEXH)
mm
Deflection
amount of accessory V-belt
Measured with tension gauge
N (kg) Hot
engine
.
Cold engine (at ambient temperature)
Measured by pushing at 98 N (10 kg)
mm 0.36+0.062/0.53+0.062
0.31 1~,0.04/0.50i0.04
Fuel tank capacity
e
Engine coolant total capacity [with reservoir tank (max. level)] e
Thermostat opening temperature [start to open - full open]
"C
Radiator cap opening pressure
MPa (kg/cm2) Approx.
65
Approx. 9.4 82 - 95
0.06
- 0.1 0 (0.6 - 1 .O)
A/C compressor belt
Power
steering pump belt
Fan belt
Power steering pump belt
1 8-10 1 10-12 1 16
667
- 755
(68
- 77)
A/C compressor belt 1 6-8 1 7-9 / 12
Fan belt
1 3-5 1 4-6 1 7.5
559 - 637
(57
- 65)
SEC.117 Power steering
Fan belt pump be1 t
284 (29)