1998 NISSAN GT-R Service Manual

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

XENON HEADLAMP SYSTEM
Trouble Diagnoses
DESCRIPTION
Problems with xenon headlamps are as follows:
They do not light up.
They blink.
GD
They are not bright enough.
In most cases the problems above are caused by faulty xenon bulbs.
There might be the possibility that the problems are caused by faulty HID control unit or lamp sockets.
ec
Follow the diagnostic procedure to determine what causes the problem.
PRECAUTIONS AT
Connect or disconnect connectors with the lighting switch OFF.
Do not touch harnesses, HID control unit, internal lamp, or metal part of the lamp while the lamps are
ON B2
(Lighting switch is ON).
Before verifying that the lamps are ON, install the parts to the vehicle temporarily and connect the battery
cable with
the connector on the vehicle. ST
If the electrical system is suspected to be the cause of the symptom, check for blown fuse or fusible link,
broken connectors, disconnected terminals, or faulty engagement.
Do not use wet hands when performing the trouble diagnoses.
F@
CIRCUIT DIAGRAM
, MA Xenon
headlamp
relay
To clearance
JJ$Rkj
lamp and
tail lamp
Headlamp
1 -- - -1 : High-voltage parts
Driver door SM
CAUTION:
0 Do not use a tester to diagnose the HID control unit circuit.
0 Do not disassemble the HID control unit and harnesses (bulb socket harness and control unit har-
ness).
0 Immediately after the headlamps turn ON, brightness and emission color vary. This is a normal
condition.
When a bulb has reached the end of its life, the brightness becomes extremely low, the bulb con-
tinues to blink, or the light looks reddish.

XENON HEADLAMP SYSTEM
Trouble Diagnoses (Cont'd)
DIAGNOSTIC PROCEDURE
I
FUSE, FUSIBLE LINK, AND XENON Fuse, fusible link, or xenon
HEADLAMP RELAY CHECK headlamp relay is faulty.
CONNECTOR CHECK ON THE VEHICLE Harness on the vehicle is
FOR BATTERY VOLTAGE faulty.
With lighting switch ON, check HID control
unit connector on the vehicle for battery
I voltage. I
OK
XENON HEADLAMP BULB REPLACE- Xenon bulb is faulty.
MENT
Replace the xenon headiamp bulb with a
known
good bulb and check for proper
operation.
HID CONTROL UNIT REPLACEMENT HID control unit is faulty.
Install a known good
HID control unit to
I
the xenon headlarnp and check for proper
operation.
NG
XENON HEADLAMP HOUSING ASSEM- OK, BLY REPLACEMENT
Install a known good xenon headlamp
housing assembly to the xenon
headlamp
and check for proper operation.
---
Starter in xenon headlamp
housing (boost circuit) is
faulty. (Xenon
headlamp housing
assembly
is faulty.)

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.

METER
Combination Meter
REMOVAL AND INSTALLATION
Parts included in this procedure:
Column cover
Cluster lid A
Combination switch
-
DISASSEMBLY AND ASSEMBLY
s EC, 248 Behind combination mete! I Tachometer and oil pressure gauge anaching screw (7)
Water tem~erature cauae I "GI yauyc - .. attaching screw (3) speedornet&
position indicator
ater temperature gauge
Tachometer
and oil pressure gauge
. . anaching screw (4)
C: Meter control unit attaching screw (9)
Upper housing cover
lit
FLEXIBLE PRINT CIRCUIT (M-AT)
I I
- Flexible
print circuit 7 r,
Tachometer Illumination bulb I
Behind meter Connector connecting
control unit
I check terminal I
I
Removal
1. Pull out the connector while pinching its both ends.
2. Pull flexible print circuit out of the connector.

METER
Combination Meter (Cont'd)
Installation
1. Push the flexible print circuit into the connector and press it
down with the connector.
2. Verify that the flexible print circuit is securely connected with
the connector.
3. Check that there is continuity between the connector connect-
ing check terminals.
BEHIND COMBINATION METER AND INTERNAL
CIRCUIT
1 27 (Ground)
2 x
z g2
15 55 13 (Ground)
1 51 (Ground)
5 1 Ground) z I (Ground!
Bulb color: G: Green L: Blue R: Red Y: Yellow
51 27 (Ground)
(Ground)