charging NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

ELECTRICAL SYSTEM
I
SECTION EL
CONTENTS
HOW TO READ DIAGRAMS
STANDARDIZED RELAY
POWER SUPPLY ROUTING
BATTERY.
.. ..
STARTING SYSTEM .
STARTING SYSTEM -Starter -
CHARGING SYSTEM .
CHARGING SYSTEM - Alternator
COMB IN AT1 ON SWITCH
INSTRUMENT SWITCH
HEADLAMP
EXTERIOR LAMP,
INTERIOR LAMP
.
..
..
..
..
..
... ......
..
.. ....
..
.. ...
EL- 2
EL- 3
EL- 4
EL- 6
EL- 9
EL-
10
EL- 15
EL- 17
EL- 23
EL- 25
EL- 26
EL- 34
EL- 38
METER AND GAUGES - Digital Type Combination Meter . . EL- 41
METER AND GAUGES - Digital Type Combination Gauge . .. .. EL- 57
METER AND GAUGES - Needle Type Combination Meter .. . EL- 65
METER AND GAUGES
- Needle Type Combination Gauge.. .... EL- 68
WARNING LAMPS AND CHIME. .......... ... .... EL- 71
VOICE WARNING SYSTEM
... ... EL- 76
TIME CONTROL SYSTEM ... EL- 81
WIPER AND WASHER .... .... ... ... . EL- 89
HORN, CIGARETTE LIGHTER, CLOCK . . ......... EL- 92
REAR WINDOW DEFOGGER
... .. ... ....... EL- 93
AUDIO AND POWER ANTENNA
,. . .... .. . EL- 95
AUTOMATIC SPEED CONTROL DEVICE (AS
C D ) . ... , . EL- 97
LOCATION OF ELECTRICAL UNITS
... .. .. .. EL-104
HARNESS LAYOUT
. . .. .. .. . EL-107

~ POWER SUPPLY ROUTING
Wiring
Diagram
FUSIBLE LINK BOX 8ATTERY BR
-
STARTING
Charging system
rc- I
-Power wmdow
EL-4

BATTERY
Full charging specific
gravity at 20°C
(68°F)
Check (Cont’d)
Converted specific
gravity at 20°C
(68°F)
1 26 I 120
I Recharging necessary I
BATTERY CAPACITY TEST
1 With battery connected to tester as shown,
turn load knob until
a draw of 3 times the
battery rating
is shown (Example Battery
rating
60AH Turn load to 180A draw )
Hold this draw for 15 seconds, then look at
voltage If voltage remains at 96 volts or
above,
THE BATTERY IS GOOD If voltage
drops below
96 volts, then proceed to next
test
2
THREE-MINUTE CHARGE TEST
1 Connect battery charger
2
3
Turn charger to a fast rate not over 40A
After three minutes, check voltmeter reading
If it is over 16 5 volts battery should be re-
placed
EL-7

BATTERY
CHARGING RATE AND SPECIFIC GRAVITY
OF BATTERY ELECTROLYTE
The relationship between the charged condition
of the battery and the specific gravity of battery
electrolyte differs,
as shown in figures below,
when the battery
is discharging and when it IS
being charged
Charging battery at a curreni 1/10 battery capacity
100 80 60 40 20 0
Charged rare (I" %J SEL8088
Chargtng battery at a curreni 116 of battery capacity
100 80 60 40 20 0
Charged rate (In %) SEL809B
As can be seen from these figures, the battery has
the following features
The specific gravity of battery electrolyte
increases very slowly while the battery is being
charged
The smaller the charging current, the slower
the specific gravity of the electrolyte increases
ling
WARNING:
a. Keep battery away from open flame while
it is being charged
b When connecting charger, connect leads
first, then
turn on charger. Do not turn on
charger first, as this may cause a spark.
c. Do not allow electrolyte temperature to go
over45"C (113°F).
CHARGING CURRENT AND TIME
REQUIRED
FOR CHARGING
Charge the battery at 1/10 the current of battery
capacity
Charging current I Time required
1/10 of battery capacity I Approx 8 - 10 hours
116 of battery capacity
(But not more than 10-ampere) Approx 4 - 5 hours ~~
~
CAUTION:
Do
not use more than 10-ampere current flow to
charge the battery quickly, as
this will shorten the
battery's service life.
-Service Data and Specifications -
Applied model Canada .
Ma,ntenance-free
Capacity V-AH I 1x0 j 12-70
1 126 I 128 Full charging specific gravi~y
at 2O'C 168°F)
EL-8

CHARGING SYSTEM
Wiring Diagram
SEL6240
EL-I 5

CHARGING SYSTEM
Make sure "S ' termmal 8s con- IC-RG IC regulator
When reaching "Damaged
A C G.", remove
0 K. IC-alternator 16 In good condltlon nected COrreCtly
Trouble-Shooting
Before conducting an alternator test, make sure that the battery IS fully charged A 30-Volt voltmeter and
suitable test probes are necessary for the test The alternator can
be checked easily by referrmg to the
Inspection Table
Engine tdltng Lighting $witch "ON,, (Check light for operatlonl
WITH IC REGULATOR
bulb Replace and Proceed -
Wpth alternator side L terminal grounded, internal short occurs when + diode IS short-circuited @
Ignition witch "ON" cOnneCtor IS. (Check light Ll and ground for operatton1 L lead w~re Connect con-
I lH,TACHl nector IS LI far operation1 and ground F
I [Check Itght I for operation1
I (MITSUBISHI ' makel I - - - - - - - - - - - - -------- -
J
..........................
Contact poiitwe lead (+I of voltmeter on B
Lqht "OFF"
9
Engine speed 1,500 rpm
terminal and negative lead (-1 to L terminal
(Measure the "oltage acres "E" and "L"
only)
Contact tip of wlre with brush and attach wire to
alternator body -0 Light"0FF" -- OK
5) Terminals "S", "L", "BAT" and "E" are marked
on rear cover
of alternator.
Brush lift wire
SEL766D
EL-1 6

CHARGING SYSTEM -Alternator-
Construction
A2T48195 (MITSUBISHI make) Through-bolt m39 541040-055.29 401
,- Front cover r I
- ~ear~ng retainer
- Diode assembly 16 0.7 5,43 54)
("1 N m lkg-rn. it-lbl
SEL625D
*Rear bearing
CAUTION. Rear cover may be hard to remove because
a ring is used to lock outer race of rear bearing Be careful not to
lose this ring during removal.
LR170-701B (HITACHI make)
(4 0 -6.0, 29.43) n 39 59
("1 N m Ikg-m, ft-lbl
Dlodt, assembly SEL626D
EL-I 7

____ ____
CHARGING SYSTEM -Alternator-
Removal
Remove bolts from alternator
Remove bolts for front stabilizer
Manually
move stabilizer down and remove
alternator
SEL627D
Disassembly
CAUTION.
Rear cover may be hard to remove because a ring
IS used to lock outer race of rear bearing To facili-
tate removal of rear cover, heat just bearing box
section with
a 200-wan soldering iron
Do not use a heat gun, as it can damage diode
assembly.
SEL628D
Rotor Slip Ring Check
1. Continuity test
Ohmmeter
SEL629D
No continuity Replace rotor
2. Insulator test
Ohmmeter
IWI
SEL630D
Continuity exists. Replace rotor.
3. Check slip ring for wear.
Slip ring minimum outer diameter.
21.6 mm (0.850 in) [HITACHI makel
22.4
mm (0.882 in) [MITSUBISHI makel
EL-I 8

CHARGING SYSTEM -Alternator-
Brush Check
1 Check smooth movement of brush
Not smooth Check brush holder and
clean
2 Check brush for wear
SEL631D
Replace brush if it is worn down to the
3. Check brush pig tail for damage
Damaged Replace
4 Check brush spring pressure
Measure brush spring pressure with brush pro-
jected approximately
2 mm (008 in) from
brush holder
Spring pressure.
limit line
1.471 - 3.531 N (150 - 360 9,
5.29 - 12.70 02) [HITACHI make]
10.93 - 15 17 02) [MITSUBISHI make]
3.040 - 4 217 N (310 - 430 9,
2 mm (0 08 in1
IP-
EE049
Not in the specified value Replace
- Stator Check
To test the stator or diode, you must separate
them
by unsoldering the connecting wires.
CAUTION.
Used only
as much heat as required to melt solder.
Diodes will
be damaged by excessive heat.
Long nose pliers used a$ a heal sink
-1, /

SEL054D
1 Continuity test
y_ Lead wire -
SEL070
No continuity Replace stator
2 Ground test
SE LO7 1
Continuity exists Replace stator
EL-19

CHARGING SYSTEM -Alternator-
Ohmmeter probes
~ositive 0 Negative 8
Positive diode plate Diode terminals
Diode terminals Positive diode plate
Negative diode plate Diode terminals
Diode terminals Negative diode plate
Diodes check (Positive side)
Diodes check (Negative side)
Diode Check
Continuity
Yes
No
No
Yes
[ MlTSUBlSHl makel
Negatwe diode plate

piate
SEL767D Sub dlode
Subdiode
Attach ohmmeter's probe to each end of diode
to check for continuity.
SEL910A
Continuity is N.G. ... Replace diode assembly.
[HITACHI makel
SEL768D
Subdiode
Attach ohmmeter's probe to each end of diode
to check for continulty.
Continuity is N.G. . Replace diode assembly
EL-20