fog light NISSAN GT-R 1998 Service Manual

TROUBLE DIAGNOSES
CONSULT (Cont'd)
DATA MONITOR MODE
ECM input
signals
Monitored item
[Unit] Main
signals Remarks
Description
lndicates the engine speed computed
from the POS signal (lo signal) of the
camshaft position sensor.
When the engine is stopped, a certain
value is indicated.
When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine coolant
temperature determined by the ECM is
displayed.
The signai voltage of the mass air flow
0 sensor is displayed.
The engine coolant temperature (deter-
mined by the signal voltage of the engine
0 coolant temperature sensor) is displayed.
-
MAS AIRiFL SE [V]
The signal voltage of the oxygen sensor
is displayed.
02
SEN [V]'
0 After turning ON the ignition switch, "RICH" is displayed until air-fuel mixture
ratio feedback control begins.
When the air-fuel ratio feedback is
clamped, the value just before the clamp-
ing is displayed continuously.
MiR
F/C MNT*
[RICH/LEAN] Display of oxygen sensor signal during
air-fuel ratio feedback control:
RICH
... means the mixture became
"rich", and control is being affected
toward a leaner mixture.
LEAN
... means the mixture became
"lean", and control is being affected
toward
a rich mixture.
The vehicle speed computed from the
vehicle speed sensor signal is displayed. VHCL SPEED SE [krn/h] or [mph]
The power supply voltage of ECM is dis-
played. I BATTERY VOLT [V]
THRTL POS SEN [V] The throttle position sensor signal volt-
age is displayed.
Throttle motor sensor output voltage Approx. 4.6V THRTL POS SE2 [V] 0 RB25DET
TURBO BOOST
SENSOR
RB25DET
Turbo pressure sensor output voltage 0 Approx. 2.7V
Indicates [ON/OFF] condition from the After starting the engine, [OFF] is dis-
0 starter signal. played regardless of the starter signal.
lndicates [ON/OFF] condition from the 0 throttle position sensor signal.
-
START SIGNAL
[ON/OFF]
CLSD THUP SW
[0
N/O
FF]
0 lndicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner sianal. AIR COND SIG
[ON/OFF]
lndicates [ON/OFFj condition from the
parldneutral position switch signal.
PiN
POSl SW [ONIOFF)
PW/ST SIGNAL
[ONIOFF]
LOAD SIGNAL
[ON/OFF]
lndicates [ON/OFfl condition from the
electrical load signal
andlor lighting
switch.
ON ... rear defogger is operating.
OFF ... rear defogger is not operating.
NOTE: Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically. *: Models with three way catalyst.

FULLY AUTOMATIC AIR CONDITIONER
Circuit
Diagram
Blower tan motor relay
Rear defogger
A Combination meter (meter UU) output * I Rear defogger relay - Rear defogger display inpui
I Compressor
Blower
fan driver signal Refrigerant Pressure sensor
Actuator driver power source
lntake driver
1 lntake driver 2 lntake driver 3 lntake driver 4
lntake door actuator NP ON output NP display input
Lighting
SW (1 step)
Y-lkEka Air mix door actuator
Illumination
power
source
Air mix driver 1 Air mrx drive: 2 Air mix driver 3 Air mix driver 4
Mode driver 1 1 Mode driver 2 Mode driver 3 Mode driver 4
INCAR In-vehicle sensor
Ambienl sensor
Sunload sensor
AM B
Water TEMP
SUN
INTAKE
Sensor around
lluminatron
groun:!
iND
Automatic
amp!iher

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