1984 NISSAN 300ZX Harness

TIME CONTROL SYSTEM
Volwnetei terminals
- Preparation for Trouble-shooting -
1 Remove R H dash side cover and remove
blower motor
2 Remove time control unit with harness con-
nected
3 Connect main harness to instrument harness (if
disconnected)
Check from harness ride
Ignition switch pOIitiOn
harness connection SE L750D
I+)
-Power Supply Cercuit Check-
1-1 OFF ACC ON
@
@ 1 @ j ov 1 ov I Approx 17v
ov Approx Approx 12v 12v 0
Contlnult"
- Trou ble-shooting
intermittent wiper does not operate
4
I Go to "Power Supply Circuit Check"
OK NG
Check harness for T C U
power supply circuit
v
Check wiper relay circuit
OK NG
I Check wiDer relav I I
I
I 10 K ~NG
Check harness between Replace
T C U and wiper relay
Check wiper switch circuit check wiper relay
1 OK
I
Replace T C U Check wiper switch
Check harness between T C U Replace
and wiper switch
b
wiper switch
v
WIPER RELAY CIRCUIT CHECK
1 Turn wiper switch to "INT"
2 Turn ignition switch to "ACC"
3 Measure voltage across and 0
Check from harness ride
fTl7rFl
Wiper switch INT 0-12v lgnmon switch ACC
Needle shakes from 0 to 12V every 2 to 15 seconds
SEL708D
Voltmeter u
WIPER SWITCH CIRCUIT CHECK
1 Turn wiper switch to "INT"
2. Turn ignitionswitch to "OFF".
3 Check continuity between @ and @
Check from harness ride
Wiper switch INT
Ignition switch OFF
Ohmmeter
SEL709D
EL-83

TIME CONTROL SYSTEM
Trouble-shooting (Cont'd)
Intermittent time of wiper cannot be adjusted
Check intermittent wiper volume circuit
Check harness between T C U
and intermittent wiper volume
Replace
wiper switch
~~~_____ ~~ ~
1
2 Measure resistance between @J and @
Turn ignition switch to "OFF"
while turning intermittent wiper volume.
Check from harness side
Ignition switch OFF
0-1 kS2
Intermittent wiper knob
0 Rat S posmon
1 kR at L postiton Approx
Ohmmeter SEL710D
combination
Check washer switch circuit
I NG f
Replace T C U Check harness between
T C U and washer switch
1
2
3
Turn ignition switch to "OFF".
Turn washer switch to "ON"
Check continuity between @ and @
Check from harness side
lgnitjon rwrtch OFF
WASH
I
Ohmmeter SEL711D
EL-84

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

rn
0
I-
b
@
BODYGROUND IR H sidel
FUSE BLOCK
BODYGROUND (R H sidel
p
m@
I
REAR WIPER MOTOR
- BODYGROUND
I v
mm
(Main harness)
BODYGROUND - (Back %del
BODYGROUND
I
U I@> I (White L H ridel
WASHER (Engine room MOTOR harness1 -
BOCiY SE GROUND IL H %de)
SF models
GL
models
GLL models
Digital type meter
Needle type mete

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