ignition NISSAN GT-R 1998 Manual PDF

ELECTRIC SUPER HICAS
Control
Unit Input/Output Signal Specifications
USING CIRCUIT TESTER
Terminal No.
Check item Specification
When control unit is disconnected
: Continuity exists.
Control unit ground circuit
Motor driving output signal
When ignition switch is
ON : Power supply voltage
(In fail-safe mode
: OV)
Motor voltage
When vehicle speed is
0 krn/h : Approx. 4.4 - 6.6V
When vehicle speed is
100 km/h : Approx. 2.4 - 3.6V EPS solenoid driving signal
Battery voltage
I Power supply voltage
Data link connector for CONSULT
(TX) I -
Engine speed signal Measure
tachometer driving signal.
Refer to EC section YECM (TCM) Input/Output Signal
Reference
Value7
.
When ignition switch is ON : Power supply voltage
When ignition switch is OFF
: OV Ignition voltage
Body
/ ground HlCAS waming
lamp When HlCAS warning
lamp is ON
: Approx. OV
When
HlCAS
warning
lamp
is
OFF : Approx. 12V
When ignition switch is ON : Approx. 12V
(In fail-safe mode : Approx. OV)
Output
signal for driving motor relay
Data link connector for CONSULT
(RX) I -
Stop lamp switch signal
(Send brake pedal operation signal to control unit.) When
pedal is depressed : Power supply voltage
When
pedal is not depressed
: OV
Continuity exists.
v Steering angle sensor 2
Steering angle sensor 1
Body
ground When steering wheel
is turned, the voltage changes
between 0 and 5V.
Ground
circuit for rear steering angle sensor
Output signal of rear steering angle sensor
I When neutral : Approx. 2.4V
-
Neutral signal of rear steering angle sensor
When ignition switch is ON
When ignition switch is
OFF
--
When neutral : Appro~. 5V
: Approx. 5V
: Approx. OV Power supply for rear steering angle sensor

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)
SELF-DIAGNOSTIC RESULTS MOI -- - - -
Diagnostic item
Diagnostic item is detected when ...
Vehicle speed signal changes rapidly during
running.
I Remarks
VEHICLE SPEED SEN
[SIGNAL
TURN](.b)
I This code appears also when
engine is idling at
1,500 rpm
or faster for more than 10
, seconds; in this case, it does
not indicate abnormality.
Vehicle speed signal is not sensed for more
than
10 seconds while the vehicle is running
at
1,500 rpm of engine speed.
CODE
54
STEERING
ANGLE SEN
[NO ANG
SIG](.a) Steering angle does not change for a while
when vehicle is running at 60
km,h or faster.
Steering angle from neutral position is kept at
60" degrees or more for a certain time when
vehicle is running
at 50 km/h or faster.
Steering angle from neutral position is kept at
30" degrees or more while vehicle travels a
certain distance.
STEERING
ANGLE SEN
[ANG SIG
FIX](.e)
STEERING ANGLE
SEN
[ANG
F1X3O0](-g)
STEERING ANGLE SEN
[NO NEUT
SIG](.b)
No neutral signal (ON signal) is sensed while
vehicle travels a certain distance.
No neutral signal (ON signal) is sensed while
steering wheel is turned more than
360'.
No neutral signal (OFF signal) is sensed while
steering wheel is turned more than
50"
degrees.
STEERING ANGLE
SEN
[NEU SIG
OFF](.c)
STEERING
ANGLE SEN
[NEUT SIG
ON](.d) - - --
a When steering wheel
is turned 360" after the
detection of neutral signal, the neutral signal is
sensed for
a certain period of time.
STEERING ANGLE
SEN
[OFFSET
NEUTJ(.f)
For a certain
period of time, input signal from
main sensor shows abnormality against sensor
power supply voltage.
a When input signal from main sefisor shows
2.5+1 V, input signal from sub-sensor shows
abnormality against sensor power supply volt-
age for a certain period of time.
RR
ST ANGLE SENSOR
[MAIN
SIGNAL](.a)
RR ST ANGLE SENSOR
[SUB
SIGNALJ(.b)
- -
Input signals from main sensor and sub-sen-
sor show more than a certain amount of differ-
ence from each other.
The voltage is higher or lower than the stan-
dard value.
RR
ST ANGLE SENSOR
[OFFSET SIG](-C)
RR ST ANGLE SENSOR
[ABNORMAL
VOL](.d)
r
a Engine speed shows an abnormally low value
for a certain period of time when vehicle is
running at
2 krnlh or faster.
ENG
REV SIGNAL
[ABNORMAL SIGNAL]
a When HlCAS motor relay is ON, motor power
supply voltage shows an abnormally lower
value than ignition power supply voltage.
When control unit keeps motor power OFF, the
motor power voltage shows a non-zero value
for a certain period of time.
MOTOR VOLTAGE
[LOW VOLTAGE](-a)
MOTOR VOLTAGE
[BAD
OBSTRCT](.b)
When a motor current is more than IOA, the
actual output of the motor shows an abnor-
mally low value for a certain period of time.
MOTOR
OUTPUT
[ABNORML
SIG](.a)
- -
MOTOR OUTPUT
[REV CURRENTJ(-C) When motor output is kept ON, a reverse cur-
rent is flowing.

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
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".

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)
TROUBLE DIAGNOSIS RECORD
If a malfunction has occurred but is not recorded on seif-diagnosis,
it may be caused by some past malfunction. In such a case, past
malfunctions can be found
by selecting "TROUBLE DlAG
RECORD" in Diagnosis mode.
The "TROUBLE DlAG RECORD" can be selected for SRS air
bag system only.
Trouble Diagnoses without CONSULT
SRS AIR BAG SYSTEM
Self-diagnosis
The diagnosis modes are User mode and Diagnosis mode.
Switching between the two modes is accomplished by using
ignition switch
and driver door switch.
When lamp is not flashing (indicating no malfunction) in User mode, operating the door switch cannot change
the mode to Diagnosis mode.
When no malfunction is detected in Diagnosis mode, turning the ignition switch from "OFF" to "ON" changes
the mode to User mode. SRB0395D
User mode
Turn diver door switch 'ON" and 'OFF" at least 5 times within 7 seconds after sw~tching the
No malfunction is detected. (Lamp OFF)
IGN SW: ON
ON
OFF- 7 sec.
System is malfunctioning. (Lamp flashes)
Diagnosis
mode
User mode
ON
OFF
b A k Turn driver door switch "ON" and "OFF at
least 5, times
within 7 seconds after sw~tching
the ignition "ON".
IGN SW: OFF to ON IGN SW: OFF to ON
ignition
"ON".
-
- -
0.5 see. 0.5 sec.
Air bag is deployed or all of diagnosis sensor unit, air bag power supply circuit and AIR BAG warning lamp cir-
cuit are malfunctioning. (Lamp ON)
ON
OFF
Either air bag sensor unit or AIR BAG warning lamp circuit is malfunctioning. (Lamp OFF)
IGN SW: ON
OFF + SRB0412D
The display indicating a malfunction (flashes) keeps operation
until reset. If, however, the malfunction is a low battery volt-
age (less than 9V), the display changes from flashing to nor-
mal operation when the battery voltage has returned to normal
(more than
9V).

TROUBLE DIAGNOSES - Supplemental Restraint System (SRS)
Symptom Chart
Trouble phenomenon I Malfunctioning unit I Possible cause
I I Warning lamp and internal circuit of combination meter are
BAG warning lamp does
not turn on. (All other warn-
ing lamps turn on.)
L-L .. AIR BAG warning lamp does I
I Harness between diagnosis sensor unit and combination
AIR
BAG warning lamp circuit
Air bag power supply circuit
not turn off (always ON). (AIR BAG warning lamp circuit
I meter is faulty (open).
faulty.
P-$ ;
Harness between
diagnosis sensor unit and combination 'bJ
Diagnosis sensor unit
0 Air bag power fuse has blown.
0 Air bag power harness is faulty.
meter is faulty
(shorted).
Diagnosis sensor unit is faulty.
I23
Diagnosis sensor unit
0 Internal circuit of combination meter is faulty. BR
Diagnosis sensor unit is faulty.
AIR BAG warning lamp
flashes.
When driver seat belt is
fas-
lamp does not illuminate for
seconds. (All other warning
Low battery voltage (Less than 9V)
Conduct either diagnosis with CONSULT (self-diagnosis, trouble diagnosis record) or diagnosis ST
without CONSULT (self-diagnosis), and repair the malfunctioning part.
After repairing the malfunctioning part, erase the memory for malfunction record.
Warning lamp and internal circuit of combination meter are 1
tened(buckleswitchisoff)
and ignition switch is turned
on, the SEAT BELT warning
1 Air bag power
SEATBELTwarninglampcircuit
circuit faulty.
Harness between
diagnosis sensor unit and combination HA
meter is faulty (open).
Air bag power fuse has blown.
0 Air bag power harness is faulty.
lamps illuminate.)
When driver seat belt is fas-
tened (buckle switch is off)
When driver seat belt is fas-.
I I
Diagnosis sensor unit
and ignition switch is turned
on, the SEAT BELT warning
lamp does not turn off
7 sec-
onds later.
tened (buckle switch is off)
I I
-.
0 Diagnosis sensor unit is faulty.
SEAT
BELT warning lamp circuit
,
and ignition switch is turned
on, the SEAT BELT warning
fa> Harness between diagnosis sensor unit and combination su
meter is faulty (shorted).
Driver seat belt buckle switch circuit
Diagnosis sensor unit
Seat belt pre-tensioner circuit
Harness between combination meter and driver seat belt
buckle switch is faulty (shorted).
Driver seat belt buckle switch is faulty (sticking).
Diaqnosis sensor unit is faultv.
Conduct either diagnosis with CONSULT or diagnosis with-
out CONSULT, and repair the malfunctioning part.
lamp turns on, and
7 sec- I I
onds later, flashes.
When driver seat belt is not
fastened (buckle switch is on)
I I Driver seat belt buckle switch ground harness is faulty
lamp turns off about
7 sec-
onds later.
and ignition switch
is tumed
on, the SEAT BELT warning
tence).
Driver seat
belt buckle switch circuit I !::);eat belt buckle switch is faulty (contact intermit-
If the flashing of AIR BAG warning lamp is caused by low battery voltage, self-diagnosis mode cannot be switched from User
mode to Diagnosis mode. In this case, diagnosis with CONSULT displays "NO SELF-DIAGNOSTIC FAILURE INDICATED".

FULLY AUTOMATIC AIR CONDITIONER
Automatic Amplifier Input /Output Signal
Specifications
Measurement condition I Terminal
No. Specification
v Signal
name
Ignition
I Operation or condition
switch
OFF
I - I Approx. 12
Battery
power source
Ignition power source
lllumination
ON
I - I Approx. 12
- I Lighting switch: 1 step 1 Approx. 12
ON r Lighting switch: 1 step I Approx. o
6 1 Rear defogger ON output signal Rear
defogger switch: ON
Rear defogger switch: OFF 1
Approx. 0
Approx.
5
Rear defogger switch: ON
Rear defogger switch: OFF
1
7
Approx. 12
Approx. 0
Thermal transmitter 8 1 Rear defogger
display input signal
Compressor: ON
Compressor:
OFF
Approx. 0
Approx.
5 Compressor ON signal
ON
-I-- - - - I Approx. 0 10 1 Ground
AfP display output signal (only
when connected) Blower
fan motor: ON
Blower fan motor:
OFF
Approx. 0
Approx.
5
12 1 Actuator driver power source
ON I - 1 Approx. 12
1 3 1 ACC power source ACC I - I Approx. 12
Right after temperature adjustment
dial operation
Air mix
door actuator driver signal
Fan control signal
Fan speed: Manual
1st
ON I - I Approx. 0
21
': Refer to "Component
Parts Inspectionn.
Sensor ground

FULLY AUTOMATIC AIR CONDITIONER
Automatic Amplifier Input /Output Signal
Terminal
No. Measurement condition
Specification V Signal name
Ignition
switch Operation
or condition
Right after mode switch (air outlet switch) operation
I
Mode door actuator driver signal
Right after
FRE switch or REC
switch operation 24
I
26 I Ambient sensor
lntake door actuator driver signal
Approx.
0
Approx. 5
A/P ON output (only when con-
'' / nected) Blower fan
motor: ON
Blower fan motor: OFF
Right after mode switch (air outlet
switch) operation
Mode door actuator driver signal
Right after
FRE switch or REC
switch operation -1 lntake door actuator driver signal
33 1 In-vehicle sensor
34 I Sunload sensor
35 1 lntake air temperature sensor
Right after FRE switch or REC
switch operation
36
*: Refer to "Component Parts Inspection".
lntake door actuator driver signal