1998 NISSAN GT-R check engine

COMBINATION METER
Combination Meter
InputlOutput Signal
Specifications
Terminal No. Measuring condition
Signal name
Ignition switch Operation or condition
Disconnect ECM connector. Approx.
8 - 10V
At 2.000 rprn: Approx. 3.OV
IVI
15
10
5 0
ELF0973D
Tachometer drive
signal
Engine is idling or running at
!,000 rpm. RB25DET
At ~dling: Approx. 7.2V At 2.000 rprn: Approx. 72V
(VI
(VI ST
15 I5 10 10
5 5
0 0
RS
ELF0974D RA
Refer to "Component Parts Inspection" (EL-27).
Approx. 12V I
-uel gauge signal
OFF With TCS
Vehicle speed: Approx. 40 km
(VI
15 10 5 0 -5 -1 0 -1 5
A Veh~cle Speed Approx 60 kmh
Body
lrounc
Speedometer is in operation.
Vehicle speed is approx.
10 kmh.)
Vehicle speed is approx.
i0 kmh.)
e speed
inpi
Without
TCS Vehcle speed: Approx. 40 k
IV!
15 10 5 0
h Vehicle speed: Approx. 60 kmh (V) 15 10
5
0
ELF0376D
-
-
;peedometer is not in opera-
on.
hermal
transmitte
iignal Refer
to "Component Parts Inspection"
(EL-27)
gnition power sup
'IY Approx. 12V
Approx. 4.8V or OV
Vehicle speed is approx. 40 kwh: Approx. 2.4V (Vi d!!!!!!!!!] ,
rehicle speed sign 2 pulses) ipeedometer
is in operation.
Vehicle speed is approx.
0 kmm.)
Voltage the
part
of the indicates the value checked with an )gue circuit tester

COMBINATION METER
Component Parts Inspection (Cont'd)
Fuel gauge unit harness
connector
Lower side
<
I
I
I
(Full) Lead switch
harness connector
on fuel gauge unit
h L Upper side
Harness connec:or on lead sw~lch
With fuel
T/f Without fuel
Lower side
(Empty)
FUEL GAUGE UNIT
Remove fuel gauge unit from the vehicle.
Check the gauge resistance on the gauge with the fuel gauge
at Empty and then Full.
SD
LEAD SWITCH
Remove fuel gauge unit from the vehicle.
Check continuity between terminals on the lead switches in the
tank.
Terminal No.
1-3
Termina! No. I Condition I Continuity
Float position
Full
Empty
THERMAL
TRANSMITER
Resistance R
Approx. 6 max.
Approx. 80 min.
5 - 7 6-7
0 When the engine has warmed up to approx. 80°C, measure
resistance between thermal transmitter and body ground.
Specification: Approx. 76 - 90Q
There is no continuity when approx. 26 of fuel is left in the sub fuel tank.
With fuel
Without fuel Yes
No

COMBINATION METER
Component Parts Inspection (Cont'd)
If the measured resistance is out of the specification with the
thermal transmitter on vehicle, remove the thermal transmitter
from the vehicle and measure resistance as
shown left.
Water temperature "C 1 Resistance R
Approx. 60 I Approx. i70 - 21 0
Approx. 65 I Approx. 140 - 170
Approx. 80 I Approx. 76 - 90
I
- - -- Appro~. 100 Approx. 47 - 53
OIL PRESSURE SENSOR (OIL PRESSURE WARNING
LAMP SWITCH)
Check continuity between oil pressure sensor and body ground.
Terminal No.
OIL PRESSURE SENSOR
Engine is stopped.
Engine is started.
Check the resistance between the oil pressure sensor and body
ground.
Condition
Terminal No.
I Oil pressure MPa (kgkmq-1 Resistance R
Oil pressure
MPa (kg/cm2) 1 Continuity
Less than
0.01 - 0.024
(0.1 - 0.25)
More than 0.01 - 0.024
(0.1 - 0.25)
0.2 (2.0) Approx. 37 - 45
Yes
No