1984 NISSAN 300ZX ignition

TIME CONTROL SYSTEM
Trouble-shooting (Cont'd)
(Interior lamp will not illuminate when outside door
handle
on driver's side IS pulled 1 I
Interior lamp and step lamps do not fade out after
all doors are closed
Check if door warning lamp goes off after all doors
are closed Check if interior lamp fades out after all doors
are closed
OK NG Check door switch
Go to "Interior lamp
circuit check" Go to "Power Supply Circuit Check"
OK NG
Check harness between
T C U and interior lamp
v
Check door handle switch circuit check
OK NG
Check door handle switch
Replace T C U Check harness between T c u
and door handle switch
NG
Check harness between
T C U and interior lamp
1
INTERIOR LAMP CIRCUIT CHECK
1 Turn Ignition switch to "OFF"
2 Measure voltage across @ and @
Check from harness ride
0 V when door 15 open 0- 12 V when
door IS closed after once opened
SEL7lZO
DOOR HANDLE SWITCH CIRCUIT
CHECK
1
2
3
Turn ignition switch to "OFF"
Pull outside door handle (driver's side)
Check continuity between @ and @
Check from harness sade
I OR
ye?! door handle (driver's rude)
SEL713D ohmmeter
EL-85

TIME CONTROL SYSTEM
Trouble-shooting (Cont'd)
BO
,@ @
Ohmmeter
Door key hole illumination does not come on even
if driver's side door handle
is pulled
I
illumination control switch
DARK BRIGHT
Except 0 R OR
Excepton OR
I Go to "Power Supply Circuit Check" I
Check harness for T C U
power supply circuit
, rK
Check key hole illumination circuit
I /OK I Check key hole illumination
Check harness between T C U
and key hole illumination
Go to "Door handle switch circuit check"
(Refer
to back oaqe 1
lNG Check harness between T C U
and door handle switch
l°K Replace T C U
1
2
3
Turn ignition switch to "OFF"
Pull outside door handle (driver's side)
Measure voltage across
0 and @
Check from harness side
Ignition witch OFF
After outside door handle Idrlver'r ride) 16 pulled and releared, voltmeter indicates OV for about 7 seconds and then 12V
Voltmeter
SEL714D
Illumination control system does not actuate
Check light switch circuit
T C U and light switch
Check illumination circuit
harness connector
Check illumination control circuit
control switch
LIGHT SWITCH CIRCUIT CHECK
Check from harness side
Ignition witch OFF Approx(i51j Light witch ON
u
SE L715C Voltmeter
ILLUMINATION CIRCUIT CHECK
Check from harness side
EL-86

TIME CONTROL SYSTEM
Trouble-shooting (Cont'd)
CHIME CIRCUIT CHECK
1
2
Turn ignition switch to "OFF"
Measure voltage across @ and @ when
driver's door
is opened and closed
Check from harness ride I
I Warning chime does not actlvate
1
I Go to "Power SUDD~V Circuit Check" 1
ignition rwltch OFF Approx 12Vwhen drlver'r stde door IS closed Voltmeter needle swings (0 - 12V) when dnver's
%,de door tr opened SEL718D Voltmeter
STEERING LOCK SWITCH CIRCUIT
CHECK
1
2
Turn ignition switch to "OFF"
Check voltage between @ and @
Check from harness side
12V when ignmon key IS ret into key cyllndei OV when tgnltlon key 16 pulled out of key cylinder Voltmeter SEL7190
lamp does not go off nor come on
I + Go to "Power Supply Circuit Check" 1 1 OK 1 NG
Check harness for T c u
power supply circuit
Check belt warning circuit
OK NG
Check warning lamp
v
Check seat belt switch circuit
OK 1 NG
Check seat belt switch.
and harness between T c u
and seat belt switch
Replace T C U ~~
BELT
WARNING CIRCUIT CHECK
1 Unfasten seat belt.
2 Measure voltage across @I and @ when
ignition switch
is "ON"
Che& from harness ride
0 -12v Joltmeter needle keeps SwlngInQ appr~x 0-12Vl for about 7 ;econdr after ngnition witch Is Voltmeter :urned ON SEL720C
SEAT BELT SWITCH CIRCUIT CHECK
1 Turn ignition switch to "OFF"
2. Unfasten driver's seat belt.
3. Check for continuity between 0 and @
4 Fasten driver's seat belt
5 Check to determine if continuity does not
exist between 0 and @
Check from harness %de
Ohmmeter
SEL7211
EL-87

TIME CONTROL SYSTEM
Trou ble-shoot
Check harness for T C U
power supply circuit
I Check rear defoaqer circuit I __
4 NG I OK
Check rear defogger relay,
and harness between
T C U
and rear defogger relay
/I Check defogger switch circuit
Check defogger switch.
and harness between
T C U
and defogger switch
Replace T C U
REAR DEFOGGER CIRCUIT CHECK
1 Turn ignition switch to ”ON”
2. Measure voltage across @ and @ while
operating rear defogger switch
Check from harness side
Ignition switch ON
&J Voltmeter
Apprm
12 V when rear defogger rwltch IS OFF
0 V when rear defogger switch IS ON
SEL7220
DEFOGGER SWITCH CIRCUIT CHECK
Check from harness ride
Ignition switch OFF OR when rear defogger switch IS ON Except OR when rear defogger smltch IS OFF
Ohmmeter
SEL723C
ig (Cont’d)
EL-88

WIPER AND WASHER
Headlamp Washer/Wiring Diagram
HEADLAMP
RELAY
WASHER HEADLAMP @
: (Back ride)
HEADLAMP
WASHER
SWITCH
7
- 22 I1 BODY GROUND IR H ride)
HEADLAMP
WASHER
BODYGROUND (L H $#de)
@ GLmodelr
@ GLLrnodelr
@ Digital type meter
@ Needle type meiei
BODY GROl (R H ride)
II fWhw
(Engine room harnerr)
I LIGHTING SWITCH
J
(Main harness)
USE
7/1
w
II
IGNITION SWITCH I ACC or ON
I I
SEL727D
EL-91

AUTOMATIC SPEED CONTROL DEVICE (A.S.C.D.)
-Preparation for Trouble-shooting Trouble-shooting
Remove AS C D control unit with harness AS C D control unit cznnot be set properly connected. I
Turn AS C D main switch "0FF"and then "ON"
to make sure indicator (located above combination
meter1 illuminates
Check for loose vacuum Check AS C D main
[-I switch and AS C D relay
Check power supply circuit for
A S C D control
unit SEL736D
Check stop switch. clutch
switch (MIT model).
inhibitor relay and
inhibitor switch (AIT model) POWER SUPPLY CIRCUIT CHECK
1 Release brake and clutch pedals
2 Turn ignition switch to "ON"
3 Turn A S.C.D main switch to "ON"
4. Check voltage between 0 and @ v Check harness between
AS C D power supply Check from harness side
-+ Release
A/T control -+ ..D" range
AS C D main wnch }-ON IOK Checksets:and
harness between control
unit and
set switch Voltmeter SELSlOD
SET SWITCH CIRCUIT CHECK
1. Turn ignition switch to "OFF". Go to "A S C D Actuator Check" -
2 Push A.S.C.D. set switch
3 Check continuity between 0 and @
Check from harness side
tion switch 4 OFF
C 0 ret switch + ON
SELBllD Ohmmeter
I
circuit
I Check set switch circuit for AS C D control unit 1
lNG Replace actuator !OK *
(Next page)
EL-99

AUTOMATIC SPEED CONTROL DEVICE (A.S.C. D.)
Trouble-shooting (Cont'd)
Turn ignition switch to "OFF"
Disconnect speedometer cable from trans-
mission
Connect an ohmmeter between
@ and
Slowly turn speedometer cable pinion by
hand to make
sure ohmmeter pointer
deflects
Ohmmeter pointer deflects twice per
rotation
of pinion.
0.
Check from harness side
Ohmmeter SEL7630
i
Check speed sensor circuit
(Digital type combination meter) -
(Refer to "METER AND GAUGES
- Needle Type Combination Meter"
~~~l~~~ AS c D
control unit
Check harness between A S C D
control unit and speed sensor
signal output terminal
of
combination meter
Does speedometer operate properly?
Go to "Speed Sensor Signal Check"
for checking combination meter
(Refer to "METER AND GAUGES
- Digital Type Combination Meter" )
Replace
speed sensor Check harness between AS C D
control unit and speed sensor
signal output terminal of
combination meter
EL-I 00

AUTOMATIC SPEED CONTROL DEVICE (A.S.C. D.)
Trouble-shooting (Cont'd)
Resume switch will not operate
Replace AS C D
control unit Check resume switch
h Accelerate switch will not owrate 11
Check accelerate switch circuit
v v Replace AS C D
control unit Check accelerate swttch
Engine hunts
Q
Check vacuum hose for breakage, cracks or
fracture
OK lNG Repair or replace hose
v
Does AS C D wire move smoothlv7
I NG v OK
Repair or replace wire
I
I Go to "Actuator Check" I
OK lNG Replace actuator
.I
Replace A S C D control unlt
RESUME SWITCH CIRCUIT CHECK
1 Turn ignition switch to "OFF"
2. Turn resume switch to "ON".
3. Check continuity between @ and 0
heck from harness side
on witch -+ OFF
M 0 h rn rn el e r SEL6120
ACCELERATE SWITCH CIRCUIT CHECK
1. Turn ignition switch to "OFF".
2. Turn accelerate switch to "ON"
3 Check continuity between @ and @
Check from harness %de
ignition switch + OFF
Accelerator witch -+ ON
SEL6130 Ohmmeter -
Large difference between set vehicle speed and
actual speed
I v
Check AS C D wire and actuator move
smoothlv
1 NG Replace wire 01
actuator
Check vacuum hose for breakage, cracks or
I fracture
4 NG
I OK Repair or replace hose
I Go to "Actuator Check" 1
4 NG
Replace actuator c OK Replace A.S C D
control unit
EL-I 01