1998 NISSAN GT-R sensor

TCS/ABS SYSTEM
CONSULT
for TCSlABS Control Unit Control
System
(Cont'd)
Diagnostic item Check item
Diagnostic
item is detected when ...
ABS ACTUATOR RELAY
b~ FAILURE] ABS
actuator relay turns ON when control unit sends OFF signal. Actuator relay is short-
circuited to ground. ABS
actuator
relay and
circuit
ABS
ACTUATOR RELAY
[OFF FAILURE] ABS
actuator relay turns OFF when control unit sends ON signal. Relay control wire is
broken.
BAlTERY VOLTAGE
[VB-IiIGH] TCSIABS
control unit
power supply
and ground
circuit
TCSIABS
control unit battery voltage is abnormally high.
BAlTERY VOLTAGE
[VB-LOW TCSIABS control unit battery voltage is abnormally low.
- -
Function of calculation in TCS/ABS control unit has failed. TCSIABS
control unit
CONTROL
UNIT
ABS motor,
motor relay and circuit
ABS
MOTOR
[LOCK FAILURE] ABS
motor speed is abnormally low.
Engine speed signal is interrupted or signal wire is suspected to be broken.
TCSIABS control unit connector or ECM-TCM or ECM connector is poorly connected. Engine
speed signal circuit
ENGINE
SPEED SIG
Circuit for
the commu-
nication line
between
TCSIABS
control unit
and throttle control unit
The communication line between TCSIABS control unit and throttle control unit is open
or shorted.
Throttle control system (throttle control unit, peripheral harness, and throttle actuator)
is abnormal.
TCSIABS control unit or throttle control unit battery voltage is low.
THROTLE
POSl
SIG
Engine main components (crankshaft position sensor, mass air flow sensor, engine cool-
ant temperature sensor, ignition primary signal, throttle position sensor, and motor throttle
position sensor) are abnormal. Engine sys-
tem
ENGINE SYSTEM
Total control
signal
1
(multiple sig- nal) for
engine,
A/l
and TCSI
ABS
Total control signal (multiple signal) for engine, AIT and TCS/ABS is abnormal (open or
shorted communication harness, faulty connections, abnormal
TCS/ABS control unit or
ECM-TCM or ECM).
TCSIABS control unit power is momentarily cut off or decreased.
LAN
SIGNAL
1
Total control signal (multiple signal) for engine,
and TCS/ABS is abnormal (open or
shorted communication harness, faulty connections, abnormal
TCS/ABS control unit or
ECM.TCM or ECM).
ECM.TCM or ECM starter switch is stuck to ON.
The starter switch is ON for 10 seconds or longer even after the engine has started.
(This is not
a malfunction.)
ECM-TCM or ECM is abnormal. (Total control signal (multiple signal) for engine,
A/T
and TCSIABS is malfunctioning. Or the system is in the process of CPU back up.)
TCSIABS is abnormal. Total
control
signal
2
(multiple sig-
nal) for
engine,
PA
and TCSI
ABS
LAN
SIGNAL
2
LAN SIGNAL 3

TCS/ABS SYSTEM
CONSULT
for TCSfABS Control Unit Control
System (Cont'd)
DATA MONITOR MODE --
I ~elect-monitor item I
Display
signals Selection from
Remarks
menu
FR RH SEN
[kmlh] Displays vehicle speed computed based on
front right wheel sensor signal.
zc
FR LH SEN [kmlh] Displays
vehicle speed computed based on
front left wheel sensor signal.
AT
Displays vehicle speed computed based on
rear right wheel sensor signal.
Displays vehicle speed computed based on
rear left wheel sensor signal.
REAR
SEN
[kmlhll
RR LH SEN
lkmlhll
FIR IN SOL [ON-OFF]
I O
FIR OUT SOL [ON-OFF] /
lndicates operating condition (ONIOFF) for 87 front right inlet solenoid.
lndicates operating condition (ONIOFF) for
front right outlet solenoid.
Rs
FIL IN SOL O
A FIL OUT SOL [ON-OFF] /
lndicates operating condition (ONIOFF) for
front left inlet solenoid.
y- 13 u -:-.!
Indicates operating condition (ONIOFF) for
1 front left outlet solenoid. --
REAR IN SOL [ON-OFq / A I Indicates operating condition (ONIOFF) for
" I rear inlet solenoid.
RR OUT SOL [ON-OFF]
/
ABS ACTUATOR [ON-OFF]
- - .
O
O
0
0
ABS MOTOR [ON-OFFI I - I 0
-
lndicates operating condition (ONIOFF) for SC rear outlet solenoid.
lndicates ABS actuator relay status
(ON1
OFF). Indicates
ABS motor relay status
(ONIOFF).
Indicates stop lamp switch status
(ONIOFF).
STOP LAMP SW
[ON-OFFl
I 0 I 0
ENG SPEED SIG [RUNISTOP] I 0 I 0 0 I lndicates engine operation.
WARNING LAMP
[ON-OFF]
I - I 0 0 I lndicates ABS warning lamp status.
BATTERY VOLT
iv I
I lidicates the voltage supplied to the TCSI n
THRTL OPENING 1x1 1 0 I 0
V
0
THL OP TARGET [%I I - 1 0
ABS control unit.
Indicates throttle angle condition.
- - -
lndcates throttle control unit target angle. 0-1- -- - -- - -
lndicates the value at which fuel to ECM is
cut off.
lndicates the gear position.
lndicates TCS switch status (ONIOFF).
TCS
MODE
GEAR
1016-
0 I lndicates TCS OFF indicator lamp status.
TCS
SW [ON-OFF]*
TCS OFF LAMP [ON-OFF]
SLIP
LAMP [ON-OFF]
0 I lndicates SLlP indicator lamp status.
I I
*: The TCS switch only indicates that the switch is ON or OFF. It does not necessarily correspond to the TCS operation condi-
tion (TCS OFF indicator lamp OFF or ON).
-
0
-
-
lndicates the selector position (ONIOFF)
based on the
A/T PNP switch signal or the
neutral position switch signal.
-
0
0
0
PIN POSl SIG
[ON-OFFI
I

TCS/ABS SYSTEM
Self-diagnosis for TCS/ABS Control Unit
control System (Cont'd)
Example: Code No. 25 Front left wheel sensor (open-circutt)
lnd~cat~on
start Start code No.
12
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(Malfunction codes)
1. Turn the ianition switch "ON" and start the engine.
ABS warnlng lamp - ON
ABS warning lamp
OFF
2. Drive the iehicle at approx. 30 km/h for appfox. 1 minute to
check that there
is no other malfunction.
3. Stop the vehicle and turn the ignition switch "OFF'. I88
4. Ground the self-diagnostic check terminal 4 on the data link
connector for CONSULT.
5. Turn the ignition switch "ONn to start the self-diagnostic results /,%@A
mode.
I---------- -------------- -?-I 3 06 0.9 03C303 3 3 06 3.6 06 09 030303030303030303
Unit: seconds BRG1185D
Tens drglts Units drgits Code No. 25
I -----l
7. Under the self-diagnostic results mode, the malfunction
memory erase mode starts when the check terminal
is discon-
nected from the ground.
8. Ground the check terminal 3 times or more in succession
-.
self-d~agnosts complete
SLlP ndicator lamp i
I ON r
f OFF - c 4 i
ground J Erase -- - - - - - - - - -i - - - - ---f2.i geconds-- - - - - - - .. t mode
Malfunct~on
memory
Malfunct~on
memory
IS erase mode starts. 1s erased. BRZOO~~D
within 12.5 seconds after the erase mode starts. (Each ground-
ing must be
2 seconds or longer.)
9. Disconnect the grounding cable from the check terminal to
erase the malfunction memory and complete the
self-diagno-
-----
CAUTION:
Keep terminal 4 grounded during self-diagnosis. Do not EL
depress the brake pedal during self-diagnosis. Do not start the
engine.
6. The SLIP indicator lamp starts blinking to indicate the malfunc- SD
tion code No. 3 or 4 seconds after the self-diagnostic results
mode is started.
The indication terminates after 5 minutes. Turning the igni-
tion switch from
"OFF" to "ON" resumes blinking the indi-
cation. During the SLlP indicator lamp operation shown
above,
TCS OFF indicator lamp and ABS warning lamp are
lit.
sis.
10. Rerun the self-diagnostic results mode to verify that the mal-
function codes have been erased.
0 When the malfunction codes have been erased, the start
code No.
12 is only indicated.
11. Disconnect the check terminal from the ground. The self-diag-
nostic results mode is now complete.
12. Drive vehicle at approx. 30 kdh for approx. 1 minute, and then
check that the
TCS OFF indicator lamp, the SLlP indicator
lamp
and the ABS warning lamp are OFF.
13. Turn the ignition switch "OFF.

TCS/ABS SYSTEM
Self-diagnosis for TCSfABS Control Unit
Control System (Cont'd)
MALFUNCTION CODE/SYMPTOM CHART I I I
75, 'I:
'2: '3: '4:
'5:
Fail-safe operation is not activated. A signal from control unit suspends TCS and ABS control operation. Brakes operate
conventionally and the vehicle operates in the same manner as a vehicle without the TCS. After specified battery voltage
resumes, the TCS
OFF indicator lamp and the ABS warning lamp go off, allowing for TCS and ABS control operation.
TCS operation only stops and fail-safe operation is activated, allowing for ABS control operation.
Malfunction is detected only when TCS is in operation.
When there are malfunctions in the self-diagnostic check terminal circuit (terminal
4 of the data link connector for CONSULT)
and SLlP indicator lamp circuit, fail-safe operation is not activated.
Some malfunctions in the
TCS/ABS
control unit cause the SLlP indicator lamp and the
ABS warning lamp to go off sepa-
rately.
Malfunc-
tion code
No.
12
21 22
25
26
31
32
35
36
41
42
45
46
55
56
57
58
61
63
71
75
80
83
84
85
86
NO indi-
cation
(no blink-
ing)
NOTE:
When the
80, 83,
84, 85 or 86 is indicated, perform the self-diaqnosis for ECM-TCM or ECM.
Check
item
Normal
Front right wheel sensor (open-circuit)
Front right wheel sensor (short-circuit)
Front left wheel sensor (open-circuit)
Front left wheel sensor (short-circuit)
Rear right wheel sensor (open-circuit)
Rear right wheel sensor (short-circuit)
Rear left wheel sensor (open-circuit)
Rear left wheel sensor (short-circuit)
Front right outlet solenoid valve and circuit
Front right inlet solenoid valve and circuit
Front left outlet solenoid valve and circuit
Front left inlet solenoid valve and circuit
Rear outlet solenoid valve and circuit
Rear right inlet solenoid valve and circuit
Battery voltage (low)
Throttle control unit system or circuit for the corn-
munication
line between TCSIABS control unit
and
throttle control unit
Actuator motor and motor relay circuit
Actuator relay circuit
TCSIABS
control
unit
Total control signal (multiple signal) for engine,
IVT
and TCS/ABS
Engine speed signal
Monitoring of total control signal (multiple signal) for
engine,
AfT and TCS/ABS
Engine system component fuel condition
Incomplete start process of total control signal (mul-
tiple signal) for engine,
AfT and TCSIABS
Continuous start process of total control signal
(multiple signal) for engine, and
TCS/ABS
Remains OFF: Data link connector circuit
Remains ON: SLIP indicator lamp circuit shorted,
TCSIABS
control unit or self-diagnostic check termi-
nal circuit open
malfunction code No. 58 is indicated, perform the Detection
Engine
running
-
0 -
0
-
0 -
0 -
0
0
0
0
0
0
0
0
0
0
0
0
-
0
0
0
0
0
0
throttle control time
In driving
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 -
0'3
0
0
0
0
0
0
unit
a Fail-safe
operation
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-'I
0
0
0
0
0
0
0
0
0
0
-'4
-'4
code Nos.
ABS
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-*2
0
0
05
-
-
-
-
-
-
-
0
self-diagnosis. Lamp
ON
TCS OFF
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-
0
When the SLlP
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0'5
0
0
0
0
0
0
-
0
malfunction

TCSIABS SYSTEM
CONSULT for Throttle Control Unit Control
System (Cont'd)
SELF-DIAGNOSTIC RESULTS MODE
- - Diagnostic item I Diagnostic item is detected when ... I Check item
THROTTLE
POSl
SEN
THROTTLE MOTOR Throttle
position sensor signal output is abnormally high or
continues to stay low for a certain period of time.
I
Throttle motor sensor signal output is abnormally high or con-
tinues to stay low for
a certain period of time. 1 Throttle motor sensor and circuit
Throttle
position sensor circuit
THRTL OPEN TRGET
THROTTLE ACTUATOR
RLY 1 Throttle motor relay is short-circuited.
[SHORT] Circuit
for throttle motor target angle signal (DKR line) is open
or shorted. TCS/ABS control unit
is abnormal.
Circuit for the communication
line between the throttle control
Throttle motor operation
does not accord with the throttle
motor target angle.
Throttle motor and circuit
I
ENGINE START SIG unit
and the TCSIABS control
unit
1 THROTTLE MOTOR
THROlTLE MOTOR RLY
[OPEN]
I Start signal is not correctiy entered due to short.
Overcurrent
is applied to the throttle motor drive circuit. I
Start signal circuit and
ECM-TCM or
ECM
Throttle motor relay is open.
Throttle motor relay and circuit
connector for
NEUTRAL POSl SW
DATA MONITOR PROCEDURE
Refer to CONSULT Instruction Manual for details on data
monitor function.
Turn ignition switch OFF.
Connect CONSULT connector to data link connector for
CON-
SU LT.
Turn ignition switch ON.
Touch "START' on CONSULT screen.
Touch ''THROTTLE CONTROL" on CONSULT screen.
Touch "DATA MONITOR".
Touch "SETTING" to set recording condition.
Touch one key from
"AUTO TRIG", "MANUAL TRIG" and
"SPECIAL", and then touch "LONG
TIME".
With "AUTO TRIG" selected, the data is automatically recorded
if a malfunction occurs during the data monitor. With "SPE-
CIAL" selected, the data is automatically recorded when TCS
is activated.
Touch "ENTER".
Return to
"SELECT MONITOR ITEM" screen and touch "ALL
SIGNALS". Display data monitor.
If necessary, sequentially touch "REC START', "REC STOP",
"DATA DISPLAY", "NUMBER
PRINT'
and "PRINT' to print
out
the data.
Bb38
Parkheutral position switch signal is not correctly entered due
to open or shorted circuit.
--
Neutral position switch circuit
and PNP switch circuit

TCS/ABS SYSTEM
CONSULT for Throttle Control Unit Control
System (Cont'd)
DATA MONITOR MODE -- -
I Select monitor item
Display
I I
THRTL POS SEN [~l l o I n
I All signals
THRTL OPENING
lo] 1 0 I
Selection
from menu
THRTL POS SE2
MI 0 1;
THRL2 OPENING rOl / 0
BATTERY VOLT MI 0 I A
TH OPEN SIG ims]/ 0 I A
TH MOTOR DUTY I"/.] I 0 I A
CLOSED THUSW [ONIOFF]
NEUT POSl SW [ONIOFF]
START SIGNAL
[ONIOFF]
TH OPEN CONT
["I
TCS SIGNAL [ONIOFF] / OIa
TCS FLAG
0
0
0
0
A
A
A
A
TH CLSD LRN
PoNwEqI 0 / A
COMM COND [ONIOFFJ
VOLTAGE
PI I I A
0
Remarks
A
PULSE [ms, Hz, %I
Dispiays throttle position sensor signal voltage.
Displays throttle angle computed based on throttle position
EG
sensor signal voltage.
Displays throttle motor sensor signal voltage.
AT
-
Displays throttle motor angle computed based on throttle
motor sensor signal voltage.
Displays the battery voltage for the control unit.
h
Displays the pulse width of the throttle motor target angle
signal from the
TCSIABS control unit.
lndicates the switch status (ONIOFF) based on the throttle
position sensor signal.
lndicates the switch status (ONIOFF) based on the
parW
neutral position switch signal. lndicates the status (ONIOFF) based on the starter signal.
Displays the throttle motor control target computed by the
control unit based on each input signal.
lndicates the throttle motor drive duty.
lndicates the throttle motor relay status
(ON/OFF).
lndicates ON when the throttle motor angle reaches a
specified
iower limit.
lndicates "VALID" when throttle motor target angle signal is
received from the
TCS/ABS control unit and the throttle
control unit closes the throttle motor.
lndicates the condition of the communication between
TCS/
ABS control unit and throttle control unit. Normally ON is
indicated, and OFF is shown when there is failure.
lndicates
if the throttle motor has been fully closed before.
"DONE" is indicated when it has, and
"YET" is shown when
it has not yet.
lndicates the voltage measured with a voltage probe.
lndicates the pulse measured with a pulse probe.
If it cannot be measured,
"%" is shown on the display. The
%" mark is also shown to the left of the final data until the
measuring result is output.
I ACTIVE TEST PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT connector to data link connector for CON-
S U LT.
3. Turn ignition switch ON.
4. Touch "START" on CONSULT screen.
5. Touch "THROTTLE CONTROL" on CONSULT screen.

TCSfABS SYSTEM
Self-diagnosis for Throttle Control
Unit Control
System (Cont'd)
MALFUNCTION CODE/SYMPTOM CHART
Malfunction
code No. Malfunctioning part Lamp ON
SLIP I TCS OFF I ABS
I I I I
": Even when start signal circuit
or parkheutral position switch circuit is abnormal, TCS operates properly. LED only blinks to
indicate the location of the malfunction. Fail-safe
operation
Throttle position sensor circuit
Throttle motor sensor circuit
Circuit for the communication line between
TCSfABS
con-
trol unit and throttle control unit
Actuator system (Motor circuit is open or throttle motor
intermittently works.)
Start signal circuit
I - I - - -
0
0
0
0
Throttle motor drive system (overcurrent)
Throttle motor relay circuit (shorted)
Throttle motor relay circuit (open)
Throttle motor return spring
I 0 I 0 I I 0 -
0
0
0
0
0
0
0
ParWneutral position switch circuit
Normal
. -
-
-
-
0 0
0
0
0
0
0
-
-
-
-
-
0
0
0
-
-
-
-
-
-

ELECTRIC SUPER HICAS
Component Parts Location
EPS solenoid valve
sensor
C I ,n HlCAS motor relay
Front right corner of trunk room