cruise control NISSAN GT-R 1998 Service Manual

TROUBLE DIAGNOSES
Control Unit
InputlOutput Signal Specifications
Terminal
No.' Operation
or measurement condition Specifications
Idle switch
(in throttle position switch) After
engine warm-up, release accelerator pedal.
After engine warm-up, depress accelerator
pedal.
PNP switch "1"
position
(c > is used for M-AT.) Battery voltage
@ Approx.
OV
PNP switch
"2"
<"33 position
(c > is used for M-AT.) Selector lever:
"1"
&?"2 position
Selector lever;
Exce~t
"1"
<"2"> ~osition Battery voltage
gz
A~~rox.
OV
PNP switch
"Dm position Selector
lever:
2" <3*> position
Selector lever: Except
"Y 4'3'5 position
Selector lever;
"Dn
position Battery voltage
Approx. OV
Battery voltage
Neutral signal
(PNP switch
"N-P"
position)
- -- Selector lever: Except "Dm position Approx.
OV
PNP switch
"Rn
position RR Selector lever: "Nn, "P" position
Selector lever: Except
"N", "Pn position
Selector lever:
"Rn
~osition
I Selector lever: Except "Rn position 1 Approx. OV
U" " Approx. OV
Approx. 4.7V
. Batterv voltaae ST
I
After engine warm-up, depress accelerator pedal
partially. (Throttle opening: More than 50%) Battery voltage i% Full
switch
(in throttle position switch)
I After engine warm-up, release accelerator pedal. I Approx. OV
Sensor ground
Throttle position sensor
power -- -- - - - I
-- --- Turn iqnition switch ON. Ao~rox. OV @z!.
Shift control signal SB2
(Except RB20DE) Turn ignition switch
ON. Turn ignition switch
OFF.
Approx.
4.5 - 5.5V
Approx. OV
EL
Vehicle speed sensor 1
(Output shaft speed sensor) When vehicle
cruises at 30 kwh (Inspected in AC posi-
tion) More
than approx. 1 V
80
(Voltage increases in
resDonse to vehicle
meed.)
Turbine sensor (Except
RB20DE)
When vehicle parks (Inspected in AC position)
When turbine rotates at approx. 1,000
rpm I Approx. 0.1 V
Approx.
OV
rn fluid temperature sensor 5 I A/l fluid temperature: Approx. 20°C Approx. 1.5V
c
3 V) Battery voltage
Approx. OV .- Y .- c a, -
Afr mode switch (POWER)
(Except M-AT)
A/T fluid temperature: Approx. 80°C ,
AIT mode switch: POWER
A/T mode switch: Except POWER - - - - - - -- Shift control signal DB1
(Except RB20DE)
Shift control signal
DB3
(Except RB20DE) Approx. 0.5V
Overdrive control switch
(Except M-AT) Battery voltage
z g 0
Shift
control signal DB2
(Except RB20DE)
A/T mode switch (SNOW)
(Except TCS) Overdrive
control switch: ON (Contact: OFF)
- .= c .- & .&!
- 5
Stop lamp switch Overdrive
control switch:
OFF (Contact: ON)
CONSULT
(RX) signal Approx.
OV
Battery voltage Appro~. OV
Battery voltage
Approx. OV
.z w .- cJ=- T) .g
2
CONSULT (TX) signal
A/l mode switch: SNOW
A/l mode switch: Except SNOW
Depress brake pedal.
' Release brake pedal.
*: Each number in parenthesis ( ) shows the terminal No. for TCM (RB25DE).
AT-1 1

TROUBLE DIAGNOSES
CONSULT (Cont'd)
DATA MONITOR MODE (M)
1 I Monitor item
I
tem Display ECU
input Main
signals
-
Description Remarks
signals
VHCUS
SE.A'T
[kmlh] or [mph]
I-
Vehicle speed computed from When
racing engine in "Nn or "P" signal of revolution sensor is position
with vehicle stationary,
displayed. CONSULT
data may not indicate
0 kmlh (0 mph).
Vehicle speed computed from Vehicle
speed display may not be
signal of vehicle speed sensor accurate under approx. 10 kmlh
is displayed. (6 mph). It may not indicate 0
kmlh (0 mph) when vehicle is sta-
tionary.
Throttle position sensor signal
voltage is displayed.
AlT fluid temperature sensor
signal voltage is displayed.
Signal voltage lowers as fluid
temperature rises.
Source voltage of TCM is dis-
played.
Engine speed, computed from Engine speed display
may not be
engine speed signal, is
dis- accurate under approx. 800 rpm.
played. It
may not indicate
0 rpm even
when engine is not running.
Turbine revolution computed Error
may occur under approx.
from signal of turbine revolution 800 rpm and will not indicate
0
sensor is displayed. rpm even if engine is not running.
ONIOFF state computed from
signal of overdrive control SW
is displayed.
ONIOFF state computed from
signal of PIN position SW is
displayed.
ONIOFF state computed from
signal of
R position SW is dis-
played.
ONIOFF state computed from
signal of D position SW is dis-
played.
ONIOFF status, computed from
signal of 2 position SW, is dis-
played.
signal of
1 position SW, is dis-
displayed. ASCD is mounted.
ON
... Cruising state
OFF ... Normal running state
Vehicle
speed sensor
1 (All) (Revolution sensor)
Vehicle speed sensor
2 (Meter) VHCUS SE,MTR
[kmk] or
[rnph]
Throttle position sensor
ITHRTLPOS SEN
I ,
AT fluid temperature sensor
PI
FLUID TEMP SE
Battery voltage
A
Engine speed ENGINE SPEED
[rpml
Turbine revolution sensor
TURBINE REV
[rpml
I
Overdrive control switch
OVERDRIVE SW
[ONIOFFJ
I
PIN position switch
PIN POSI SW
[ONlOFF]
R position switch
R POSITION SW
[OWOFF]
I
2 position switch
1
2 POSITION SW
[ONIOFF]
I
D position switch
1 position switch 1 POSITION SW
[ONIOFF]
I
D POSITION SW
[ON/OFF] X
ASCD OD cut signal
ASCD.OD CUT
[ONIOFF]
X
ASCD cruise signal
Status of ASCD OD release
signal is displayed.
ON
... OD released
OFF ... OD not released
ONIOFF status, computed from
signal of
kickdown SW, is dis-
played.
ONIOFF status, computed from
signal of HOLD shift SW, is dis-
played.
ONIOFF status, computed from
signal of closed throttle position
SW, is displayed.
ONIOFF status, computed from
signal of wide open throttle
position SW, is displayed.
ASCD.CRUISE
[ONIOFF]
This
is displayed even when no
ASCD is mounted.
This is displayed even when no
kickdown switch is equipped.
Kickdown
switch
KICKDOWN
SW
[ONIOFq
Wide open throttle position switch X .
X A/T mode switch
t
WIO THRUP-SW
[ONIOFq POWERSHIFT SW
[ONIOFF]
Closed
throttle position switch
, CLOSED THUSW
[ONIOFF]