NISSAN GT-R 1998 Service Manual

ELECTRIC SUPER HICAS
Trouble Diagnosis with CONSULT (Cont'd)
connector for
b SELECT DlAG MODE 01 b SELF-DIAG RESULTS
DATA MONITOR
ACTIVE TEST
ECM PART NUMBER
I k SELECT MONITOR ITEM I 1
I SELECTION FROM MENU
u
DATA MONITOR PROCEDURE
1. After connecting CONSULT to data link connector, start the
engine.
2. Touch "START", "HICAS" and "DATA MONITOR".
3. Select items to be monitored.
(1) When "ALL SIGNALS" is selected, touch "START".
(2) When "SELECTION FROM MENU" is touched, "SELECT
TEST ITEM" screen appears. Touch appropriate items on that
screen,
and touch "ENTER" and "START".
(3) Touch "PRINT",
if printout is required.

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".

RESTRAINT SYSTEM
SECTION RS
CONTENTS
TROUBLE DIAGNOSES - Supplemental
Restraint
System (SRS) ................................................. 2
Component Parts Location .......................................... 2
Precautions ................................................................. -2
Circuit Diagram ............................................................ 2
....................................................... Preliminary Check .3
Trouble Diagnoses with CONSULT ............................. 3
........................ Trouble Diagnoses without CONSULT
............................................................ Symptom Chart 9
..................................... Component Parts Inspection 10 T? 21 -3

TROUBLE DIAGNOSES - supplemental Restraint System (SRS)
Component Parts Location
Passenger air bag module
Diagnos~s
sensor
unit Driver air bag module
S~de
air
bag nodule
Satell~te sensor Seat belt pre-tensloner SRB0568D
Precautions
To perform system diagnosis, use self-diagnosis function and
CONSULT.
Do not use electrical test equipment such as a circuit tester
because
any wrong operation caused by a weak electric cur-
rent
of a tester must be prevented.
Circuit Diagram

TROUBLE DIAGNOSES - Su~plemental Restraint Svstem (SRS)
-
connector for
SELF-DlAG [CURRENT] C
* NO SELF DIAGNOSTIC
FAILURE INDICATED.
FURTHER TESTING
MAY BE REQUIRED. $ *
-1 PRINT
Preliminary Check
Check battery voltage and specific gravity.
When battery voltage drops to less than approx. 9V, the
"AIR BAG" warning lamp starts flashing (indicating a mal-
function).
Gj
Check the connections of component connectors.
Check that the fuse is not blown.
3F
Trouble Diagnoses with CONSULT
SELF-DIAGNOSIS PROCEDURE
Connect CONSULT to data link connector on the vehicle.
Turn ignition switch "ON".
83
Touch "AIR BAG" on the CONSULT screen.
Touch an appropriate mode key on "SELECT DlAG MODE"
screen.
gL
The self-diagnostic result for the selected mode is displayed.
Repair or replace the malfunctioning part according to the
self-
diagnostic result.
89
Touch "PRINT, if printout is required.
After
repairing the malfunction, touch "SELF-DIAG
[CURRENT]", and after checking that "NO SELF DIAGNOSTIC
FAILURE INDICATED" is shown on the display, touch
"ERASE.
For seat belt pre-tensioner system, the diagnostic proce-
dure
is completed when "NO SELF DIAGNOSTIC FAILURE
INDICATED"
is displayed.
FURTHER TESTING MAY BE REQUIRED. * *
* NO SELF DIAGNOSTIC
FAILURE INDICATED.
t
PRINT SRS609
9. Return to "SELECT DlAG MODE" screen and touch "SELF-
DlAG
[PAST]".
10. After checking that "NO SELF DIAGNOSTIC FAILURE INDI-
CATED" is displayed on the "SELF-DIAG [PAST]" screen, fin-
ish the diagnosis.

TROUBLE DIAGNOSES - Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT (Cont'd)
SELF-DIAGNOSTIC CODE CHART - -
Diagnostic item 1 Explanation Repair order
NO SELF-DIAGNOSTIC
I NO malfunction is detected. I - FAILURE INDICATED
AIRBAG MODULE
iOPENl
Driver air bag module circuit is open (including the
spiral cable).
Driver air bag module circuit is shorted to some power
supply circuit (including the spiral cable).
Driver air bag module circuit is shorted to ground
(including the spiral cable).
Driver air bag module circuits are shorted to each
other (includina the s~iral cable).
AIRBAG
MODULE
IVB-SHORTI
1. Visually
check the wiring harness c~nnection. 2. Check conbnuity of the spiral cable. 3. Replace driver air bag module. 4. Replace the diagnosis sensor unit. 5. Replace the harness if it has visible damage.
AIRBAG
MODULE
IGND-SHORTI
AIRBAG
MODULE
[SHORT]
--
CONTROL UNIT I Diagnosis sensor unit is malfunctioning. I 1. Visually check the diagnosis sensor unit connection. 2. Replace t9e diagnosis sensor unit.
ASSIST
NB MODULE
[OPEN] I Passenger air bag circuit is open. I
ASSIST NB MODULE
NB-SHORTI
ASSIST
NB MODULE
[GND-SHORV
Passenger air bag circuit is shorted to Some Power
supply circuit. ,
Passenger air bag circuit is shorted to ground.
ASSIST
NB MODULE
lSHORTl
1. Visually check the wiring hamess connection. 2. Replace passenger air bag module. 3. Replace the diagnosis sensor unit. 4. Replace t!!e harness if it has visible damage.
Passenger air bag circuits are shorted to each other.
Driver side air bag circuit is open.
SlDE
MODULE RH
{OPEN]
SlDE MODULE RH
[VB-SHORT]
SlDE MODULE RH
[GND-SHORTI
Driver side air bag circuit is shorted to Some power
supply circuit.
Driver side air bag circuit is shorted to ground.
SlDE MODULE LH
[OPEN]
I Passenger side air bag circuit is open. I
1. Visually check the wiring hamess connection. 2. Replace driver side air bag module. 3. Replace the diagnosis sensor unit. 4. Replace the harness if it has visible damage.
SlDE MODULE
RH [SHORT]
SIDE MODULE LH
NB-SHORTI Driver side air bag circuits are shorted to each other.
SlDE MODULE LH
[GND-SHORT]
Pa~Sengef side air bag circuit is shorted to Some
power supply circuit. -
Passenger side air bag circuit is shorted to ground.
1. Visually check the wiring harness connection. 2. Replace passenger side air bag module. 3. Replace the diagnosis sensor unit. 4. Replace the harness if it has visible damage.
SlDE MODULE LH
ISHORTl
Passenger side air bag circuits are shorted to each
other.
Driver satellite sensor is malfunctioning.
SATELLITE SENS
RH
[UNIT FAIL] 1. Visually check driver satellite sensor connection. 2. Replace the driver satellite sensor. 3. ReDlace the harness if it has visible damage.
SATELLITE SENS RH
[COMM FAIL]
Driver satellite sensor is malfunctioning. Diagnosis sensor unit is malfunctioning. Wiring harness between diagnosis sensor unit and
satellite sensor is damaged.
SATELLITE SENS LH
[UNIT FAIL]
1. Visually check driver satellite sensor connection. 2. Replace the driver satellite sensor. 3. Replace the diagnosis sensor unit. 4. Replace the harness if it has visible damage.
1. Visuallv check the connection of passenqer satellite 0i 0 Passenger satellite sensor is malfunctioning. sensor: 2. Replace
C!e passenger satellite sensor. 3. Re~lace the harness if it has visible damage.
SATELLITE SENS
LH [COMM FAIL]
Passenger satellite sensor is malfunctioning. Diagnosis sensor unit is malfunctioning. Wiring harness between diagnosis sensor unit and
satellite sensor is damaged.
1. Visually check the connection of passenger satellite
sensor.
:: ~~~/~~~ ;E $~~,","$,"~~~~~t",$fnsOr' 4. Replace the harness if it has visible damage.
1. Visually check the wiring harness connection. 2. Replace driver seat belt pre-tensioner. 3. Replace the diagnosis sensor unit. 4. Replace the harness if it has visible damage.
J. I
1. Visually check the wiring harness connection. 2. Replace passenger seat belt pre-tensioner. 3. Replace the diagnosis sensor unit. 4. Replace the harness if it has visible damage.
DRIVE
PRE-TENSIONER
[OPENNB-SHORT]
DRIVE PRE-TENSIONER
[GND-SHORTJ
ASSIST PRE-TENSIONER
[OPENNB-SHORT]
ASSIST PRE-TENSIONER
[GND-SHORT] I I
a The screens for "SELF-DIAG [CURRENTJ", "SELF-DIAG [PAST]" and "TROUBLE DlAG RECORD" share the same message. Follow the repair procedures in numerical order. Check whether a malfunction is eliminated each time a repair item is
finished, and when the malfunction is eliminated, further repair work is not required.
After repairing the system, touch "ERASE" to clear the memory and check with CONSULT again.
If both seat belt pre-tensioner systems on the driver seat and passenger seat have failed at the same time, only one of
the two failures is displayed first. The other failure is displayed after the first failure is repaired. For seat belt pre-tensioner
systems,
only
"SELF-DIAG [CURRENTJ" is displayed; "SELF-DIAG
[PASTJ"
and "TROUBLE DlAG RECORD" are not dis-
played.
RS-4
The circuit for the driver seat belt pre-tensioner is
open or shorted to some power supply circuit.
The circuit for the driver seat belt pre-tensioner is
shorted to ground.
The circuit for the passenger seat belt pre-tensioner is
open or shorted to some power supply circuit.
The circuit for the passenger seat belt pre-tensioner is
shorted to ground.