1998 NISSAN GT-R ignition

POWER WINDOW SYSTEM
Power Window Main Switch Input/Output
Signal Specifications (Cont'd) -
Terminal No.
Ground Signal
name
Driver door switch signal
Driver door power window
motor UP signal
Rear RH door power window
DOWN signal Specification
Approx.
OV
Approx. 12V
Measuring condition
ON or another position
(Timer is in operation.)
Encoder power supply Ignition switch
-
ON
or another position
(Tmer is in operation.)
Passenger door power win-
dow DOWN signal Operation
or condition
Driver door is opened. (ON)
-
Driver door is closed. (OFF)
Ignition power supply
Rear RH door power window
UP signal
ON
Rear LH door power window
DOWN signal
Rear LH door power window
UP signal
Passenger door power
win-
3ow UP signal
Power supply to the
passen-
jer door and rear RH
8 LH
joor
power window switch
UP operation
The rear
RH window DOWN
switch in the main switch is
operated. Approx.
OV
Approx. 12V
Other than UP operation
-
Approx. 12V
-- -- Appro~. OV
Approx. 5V
Operation other than
above
-
The passenger door DOWN
switch in the main switch is
operated.
Operation other than above Approx.
OV
Approx. 12V
Approx. 12V
Approx. OV
The
rear RH window UP switch in the main switch is operated.
Operation other than above
The rear LH window UP
switch in the main switch
is operated.
--
Appro~. 12V
Approx. OV
The rear LH window DOWN
switch in the main switch is operated.
Operation other than above
Approx.
12V
Approx. 12V
Approx. OV
Operation other than above
The passenger door UP
switch in the main switch is
operated.
-
I
Approx. 12V
-- - Approx. OV
Approx. 12V
Operation other than above - - Approx. OV

I Sunroof motor assembly 1 Component Parts Location
I Sunroof switch < OCEM57DI
Circuit Diagram
CIB PMl relay
Sunroof motor assembly (Fully-closed position)
I I Limit SW 2 I -1 I i
3
5
1 1 -- LL
1 --
CLOSE relay - I ~irnitsw~ I
Sunroof SW
Slide SW
CLOSE 5--1
Sunroof Switch and Sunroof Motor Assembly
InputlOutput Signal Specifications
-
Measuring condition
I I
- Operation
Terminal No.
1
2
Ignition switch
3
4
5
ON
ON
'lased
ON
ON
ON Approx.
12V
OV
~~ll~ closed position to fully open position
Approx. 2V
OV
Approx. OV OV
OV
'Pen
Position
to fully closed
position
Approx.
OV (Motor is running.)
Approx. 2V
Approx. OV OV
OV
Fully closed position
to tilt UP position
Approx.
12V
Approx. OV (Motor is running.)
Approx.
OV
Tilt UP position to
fully closed position
Approx.
OV (Motor is running.)
12'
Approx. 12V
Approx.
OV (Motor is running.)
ov
OV
Approx. OV
ov
OV
Approx. OV

AUTO LIGHT SYSTEM
Component
Parts Location Inside the meter
-4 Auto light control unit
Auto Light Control Unit InputlOutput Signal
Specifications
Terminal No. Measuring
condition
Operation or condition
I
Signal name Specification
Ignition switch
I Light is applied to the I Approx. 12V
liaht sensor.
Tail lamp relay control
signal
Speedometer is in operation. (Vehicle speed is
approximately 40
kmlh.)
Lighting switch: AUTO
Vehicle speed signal (2 pulses)
Light is applied to the
liaht
sensor.
I
4
Light is not applied to
the light sensor.
Approx. OV
Approx.
OV
Navigation screen
dimming signal Liahtina
switch: 1 ST
- I I
I
Light is not applied to
the light sensor.
ignition power supply Approx. 12V
I - I
I Light
is applied to the I Approx. 12V
liaht sensor. Approx. 12V
Headlamp
relay con-
trol signal Lighting
switch: AUTO
Lighting switch AUTO
signal Lighting switch
ACC -
Light is not applied to
the light sensor.
Ground Approx.
OV
OFF
AUTO Approx. 12V
Approx. OV
Driver door switch sig-
n
al
ACC Approx.
OV
Approx.
OV
Approx. 12V
-
ACC power supply Driver
door switch
ACC ON
(Open)
OFF (Closed)
- I Approx. 12V

AUTO LIGHT SYSTEM
Circuit Diagram
Xenon
headlamp
relay
To clearance
lamp and
tail lamp
I---- I : High-voltage parts ----- EL-2163D
Trouble Diagnoses
SYMPTOM CHART
Symptom I Possible cause
I a Faulty auto light control unit power supply or ground harnesi
I Faulty auto light control unit
When outside
is dark, neither small lamps nor headlamps
tum
ON
by
auto light operation. [Lighting switch
(1ST
and 2ND)
is normal.]
When outside is dark, small lamps turn ON but headlamps do not turn
Faulty lighting switch to auto light control unit harness
ON by auto light operation. [Lighting switch (1 ST and 2ND) is normal.] Faulty auto light control unit
0 Faulty lighting switch Faulty lighting switch to auto light control unit harness a Faulty lighting switch ground harness
When outside is dark, headlamps turn ON but small lamps do not turn
ON by auto light operation. [Lighting switch
(1ST
and 2ND) is normal.]
Faulty lighting switch to auto light control unit hamess Faulty auto light control unit
a Neither headlamps nor small lamps turn OFF when the driver door is
opened with the ignition switch at ACC. a Headlamps and small lamps turn OFF when the ignition switch is
turned to ACC with the driver door closed.
0 While the vehicle is driven at night, headlamps go off momentarily
~~- - - pp a Faulty door switch a Faulty door switch to auto light control unit harness a Faulty door switch ground harness 0 Faulty auto light control unit
when it passes under street lamps.
0 While the vehicle is driven in the early morning or evening, headlamps
turn ON momentarily when it passes under an overpass or through a Faulty speedometer to auto light control unit harness a Faulty auto light control unit
building shadows.
During the day, neither small lamps nor headlamps turn OFF. During the day, headlamps tum OFF but small lamps do not turn OFF. a Faulty auto light control unit

IGNITION KEY-OPERATED ILLUMINATION SYSTEM
Behind combination meter Component Parts Location
Meter control unit
Circuit Diagram
7, . .
& Driver door lock detection switch
T
2 1 r Passenger door SW Rear RH door SW 326
' a
Rear LH door SW
3 - -
Room lamp
IGN SW illumination
TK24 (Brown) TK20 (Brown) TK20 (White) EL-2 178D I 1 J
Meter Control Unit Input/Output Signal
Terminal No.
Specifications I I
Specification
Approx.
OV
Approx. 12V
Approx. OV
Approx. 5V
Approx. 12V
Approx. OV
Approx. 12V
Approx. 12V
Approx. OV
Approx. 12V
Approx. OV
Approx. OV
Approx. 12V
Approx. OV'
Approx. 12V
Measuring condition
Signal name Ignition
Operation or condition
switch
Driver door switch ON (Open)
OFF Driver door switch
signal OFF (Closed)
Driver door lock
sig-
Door is unlocked. (Switch ON)
nal OFF
Door is locked. (Switch OFF)
Battery OFF
-
Open a door. (ON)
Door switch signal
OFF
Close all the doors. (OFF)
Ignition power supply ON
-
Key-in detection Remove
the ignition key.
switch signal OFF
Insert the ignition key.
Ground ON
-
OFF Room lamp switch:
Insert the ignition key. Each door switch
Room lamp, ignition Neutral position ON
(Open)
OFF (Closed)
switch illumination
Remove the ignition key from the
signal
- lamp switch: Close all the doors. key cylinder.
Neutral position
Turn the ignition switch ON.

COMBINATION METER
System Description
Speedometer, tachometer, odoltrip meter, fuel gauge, and
water temperature gauge are integrally controlled by the con-
trol circuit in the meter control unit.
Diagnosis function has odoltrip meter segment check, low fuel @
warning lamp check, and continuity check in the meter control
circuit and the meters (speedometer, tachometer, fuel gauge,
and water temperature gauge).
Component Parts Location
Combination meter ABS unit
ID Transfer (4WD) I H side of trunk room
I -unit connector I
/I Diagnosis Function
meter is displayed, turn the ignition switch ACC or
down the odoltrip meter switch, turn the ignition switch
/
ON.
3. Verify that 0000.0 km is displayed on the trip meter.
4. Press the odoltrip meter switch 3 times within 5 seconds.
5. All the odoltrip meter segments light up along with low fuel
warning lamp.
EL-21
SEGMENT CHECK AND LOW FUEL WARNING LAMP
CHECK

COMBINATION METER
Diagnosis Function
(Cont'd)
METER CIRCUIT CHECK
After the segment check, press the odohrip meter switch to
verify that meters operate as shown below. (Low fuel warning
lamp goes off at this point.)
i
ELF0967D I It takes 1 minute for the meters to become stable.
DIAGNOSIS FUNCTION CANCELLATION
Turn the ignition switch ACC or OFF.
Meter-related Circuit Diagram
I I TO oil pressure W.L

COMBINATION METER
Trouble
Diagnoses
DIAGNOSTIC PROCEDURE
I YES
Meter control unit is faulty.
Meter battery or ignition power supply is faulty.
DO
warning
lamps
on
the
meter light
up?
. No .
at the low fuel warning lamp check? The bulb
is faulty.
t
Meter control unit is faulty. I
Does the liquid crystal display operate properly at the segment check? NO
Check the attaching screw for the ' NG *F3epair malfunct~oning part and
the meter circuit check? meter that
does not operate properly. * conduct the meter circuit check again.
OK
Meter control unit is faulty.
YES
DIAGNOSIS RESULT 1
4
Symptom I Check item I Malfunctioning item
Go
to "DIAGNOSIS RESULT
1".
Low fuel warning lamp does not operate
properly. Go to
"DIAGNOSIS RESULT
2".
Any of tachometer, fuel gauge, and water
temperature gauge does not operate prop-
erly.
More than one meter out of tachometer, fuel
gauge, and water temperature gauge do not
operate properly.
Speedometer and
odohrip meter do not
operate properly. Sensor
or harness for the meter that does
Sensor circuit for the meter (warning lamp)
1 1: 1 not operate properiy
1 that does not operate properly
~ Meter control unit
Meter control unit
DIAGNOSIS RESULT 2
Symptom
Any of speedometer, tachometer, fuel gauge,
and water temperature gauge does not oper-
ate properly. Vehicle
speed sensor or harness
Meter control unit
-
Vehicle speed input signal (with TCS)
Check item
I Malfunctioning item
NG
OK
Perform "VEHICLE SPEED INPUT SIGNAL
DIAGNO-
SIS"
on the next page. (without TCS)
More than one meter out of speedometer,
tachometer, fuel gauge, and water tempera-
ture gauge
do not operate properly. Resistance
of the meter that does not
operate properly
Meter control unit
NG
OK
- -
Meter that does not operate properly
Meter control unit