Pump NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

METER AND GAUGES - Digital Type Combination Meter
Trouble-st
Torque meter does not operate
1 Go to "Display Check" I
Go to "Power Unit Check"
v
Replace meter Replace
and gauge assembly power unit
I
I Check boost sensor circuit I
boost sensor and meter boost
sensor
1 Disconnect meter harness connector
2 Connect vacuum pump gauge to boost
3
4
(white)
sensor vacuum hose
Turn the ignition switch to "ON"
Apply vacuum pressure to boost sensor by
vacuum pump gauge and measure voltage
across
0 and
Vacuum -
~eep harness connected
J wu 1 3v at-53 3kPa 1-400 mmH
SEL667 Voltmeter -15 75 mHg) '
rg (Cont'd)
Main fuel gauge does not operate
I
Go to "Display Check"
Go to "Power Unit Check"
Replace meter Replace
and gauge power unit
assembly
Check fuel tank main gauge clrcult
I OK
Replace meter
and gauge
assembly Go to "Fuel tank
gauge check"
.
Check harness between Replace fuel
fuel tank gauge and meter
tank gauge unit
1 Disconnect meter harness Connector
(black)
Turn ignition switch to
"OFF" 2
3 Measure resistance between @ and @
e

Ohmmeter SEL6680
EL-49

METER AND GAUGES - Digital Type Combination Meter
Power Unit Check
Voltmeter
terminal
(f) (-)
E -
-%; 0
0
@I
__
@
9
0
0
Remove power unit with harness connected
Perform voltage and continuity tests Refer to
chart below
I Voltage
[VI
Approx 12
Approx 5
Approx 16
Approx 5
Approx 22
Approx 285
Turn ignition switch to "ON"
1 - 1 More than 6
Remarks
Check when no
display appears
For speedometer
For tachometer
For Temp,
Oil, Volt
sause
For Fuel gauge
For "Trip", "Ave
speed"
& "Dirt to
empty" meter
Turn ignition switch to "OFF"
Ohmmeter
Continuity Remarks
Check when no
ground display appears
If specified voltage or continuity is not produced,
replace power unit.
- Boost Sensor Check
1 Connect vacuum pump gauge to boost sensor
vacuum hose
2 Disconnect harness connector from boost
sensor and connect battery and voltmeter
as
shown
3 Apply vacuum pressure to boost sensor by
vacuum pump gauge and measure voltages
Approx.
2.2V at 0 kPa (0 mmHg, 0 inHg)
(Atmospheric pressure)
Approx.
1 3V
at -53.3 kPa (-400 mmHg, -15 75 inHg)
vacuum pump gauge
SEL674D
EL-53

SEL740D
CAUTION:
a Be careful not to twist wire when removing it.
Do not tense wire excessively during adjust-
ment.
Without depressing the accelerator pedal, adjust
wire tension with adjusting nut
Wire free play (at throttle lever):
0 - 0.5 mm (0 - 0.020 in)
a For A S.C.D. stop switch and clutch switch
adjustment, refer to
BR and CL sections.
a For vacuum pump and tank check, refer to HA
sect ion.
EL-1 038

LOCATION OF ELECTRICAL UNITS
hock absorber
Direction sensor
Lock-up mntrol unit (For electronic controlled automatic tranmisionl
(Only for Canada digital L------ type combination meter I ~UIDU~ madell
Fuel pump relay r,
(Rear side inner
SEL75ZD
EL- 1 05

,
TO TIME CON-
TROL UNIT
TO INST H LH (CHIME)
TO ENGINE
ROOM
H R H (UPHOLD RELAY)
TO ENGINE ROOM H L H IHEAO-
TO LIGHT SW TO LIGHT SW -
TO REAR
ro KEY sw
3OOM H R H A S C 0 RELAY1 To As sw (VACUUM ROOM H L H
PUMP RELAY)
(For time control system, headlamp system, AS C 0 and E F I system1

@ To @ (Non-turbocharger models) 0 Ambient temp sensor 0 Vacuum tank (Turbocharger models)
0 To @I (Turbocharger models) 0 PoglampRH @ Hoodswitch
0 To @il White) @ Vacuumpump 0 I'oglampLH @ Hoadlamp washer motor
0 @D Horn L H
/ @ Side marker lamp L H
0 To @I (Blue) (Turbocharger models)
@ To @ White) 0 ranmotor
@ Uphold relay (Turbocharger models)
@ Fuublchk @ Headlamp motor R H
0 Front shock absorber R H @ Radiator coolant level switch 0 Hcadlamp L H
Front combmation lamp L H
A/T relay I @ AS C D relay (Non-turbocharger AIT models) @ Water cock an valve Compressor relay 0 Headlamp R H Vacuum pump relay @ Side marker lamp R H
(Turbocharger models) @ Horn RH Horn relay @ Front combination lamp R H
6 Headlamp tmer @ To @ (Blue) I@ To @ (White)
@Q To @ (White) @ To 0 (Non-turbocharger models)
@ Inhibitor switch (Non-turbocharger models)