sensor NISSAN 300ZX 1984 Z31 Engine Fuel And Emission Control System Owner's Manual

ELECTRONIC CONTROL SYSTEM INSPECTION
Replace E C C S control unit
Fuel temperature sensor (Code No. 41)
Replace fuel temperature sensor and
Disconnect 20-pin connector and measure the
resistance between terminal
@ and ground
Fuel temperature I Resirlance
Above20'C 168'Fl I Below 2 9 kC
Below 2O:C 168"FI Above 2 1 kC1
-
SEF693B
Repair harness 1
Measure the resistance of the fuel temperature sensol
i c3425 2
1 '"
-
- :2
2 - ? 103
i6
-24 Y
t+2
10'
-30 0 40 80 1M (-221 (321 (1041 (1761 (248) -20 20 60 100 130 1-41 (681 (1401 12121 (2661
Temperarure 'c 1°F) -
EF %I EC-53

ELECTRONIC CONTROL SYSTEM INSPECTION
OK -
@ Exhaust gas sensor heater
Disconnect E C C S 15-pm connector, and check
voltage between terminal@ and ground when igni
tion switch
IS turned to ON
Check harness
I J
Battery dtqe
SEF701
NG
+
Measure the resistance of exhaust gas sensor heater
Renslance 2 87kO Pa
SEF702E
NG I
Replace exhaust gas sensor
EF & EC-57

MIXTURE RATIO FEEDBACK SYSTEM INSPECTION
Repair or replace E C C S harness
SEF71OB
SEF7118
f
Connect a resistor (2.5 kS2) between terminals of cylinder
head temperature sensor harness connector
I
Start engine and warm up engine until water temperature
indicator points to the middle
of gauge
Race engine two or three times under no-load. then run
engine
at idle speed
After checking CO%,
1) Disconnect the resistor from terminals of cylinder head
temperature sensor
2) Connect cylinder head temperature sensor harness
connector to cylinder head temperature sensor
ness, and disconnect throttle inspection lamp on control unit goes on and off more
I
Turn off engine and remove air flow meter from
vehicle ~~
Drill a hole
in seal plug which seals variable resistor of
air flow meter and remove seal plug
warm up engine until water temperature indicator
Varrable resistor scmw
SEF7128

PRESSURE REGULATOR CONTROL
I nspi
1 Disconnect cylinder head temperature sensor
harness connector and connect terminals of
harness connector with
a lead wire
2 Disconnect a vacuum hose between pressure
regulator and solenoid valve
3 Start engine and make sure that the vacuum
does not exist for three minutes
SEF743B
4 If vacuum exists, disconnect pressure regulator
control modulator harness connector for the
modulator located under the battery and check
solenoid valve and circuit
a Ignition switch OFF
SEF744B OR
b Ignition switch ON
a,@, @ Battery voltage
@ Between OV and battery voltage
SEF745B
c. lgnitlon switch START
13isconnect starter motor "S" terminal
I
Battery voltage
4
SEF7468
d Check continuity between terminals of sole-
noid valve
Continuity should emst
SE F 6988
5 If solenoid valve and circuit are 0.K , replace
pressure regulator control modulator.
-
EF & EC-73

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
General Specifications
Fuel pump Cut-off discharge pressure 422 -490 I4 3 -5 0.61 .71)
kPa (kg/cm'. psi1
Pressure regulator Regulated pressure 250 1 (2 55.36 3) kPa Ikalcm'. Dsll
Air regulatoi
27 5 (971 I Air flow amount
[atZO'C (68OF)I m3 (cu ft)/hr ~~
Turbocharger
Max supercharging pressure 42 7 - 507
kPa (mmHa.
InHal (320-380.1260-1496)
Emergency relief valve Valve opening pressure 507 - 53 3
(380 -400.14 96 - 15 75) kPa (mmHg, InHg)
-inspection and Adjustment -
Fuel pressure
At idle Approximately
kPa (kg/cm', psi) 206 (2 1.30)
The moment accelerator
pedal IS fully depressed Approximately
255 (2 6.371 kPa (kglcm'. psi)
Air flow meter
Voltage between terminals
B and D 1 620 1 V
Cylinder head temperature
sensor and fuel temperature sensor Thermistor resistance
at-lO'C 114'F) 7 0- 11 4 kSl
at 20'C I68'Fl 21-29kSl
at 50°C Il22'FI 068- 1 0 kSl ~~~~
Throttle
valve switch Engine speed when idle
swmh
IS turned from
"ON" to "OFF"
Approximately
900 rpm
Exhaust gas sensor Heater resistance 26-31Sl
- Tightening Torque
-
U"lt Nm kwn ft-lb
Throttle chamber 18-22 18-22 13-16 securing bolt
Intakecollector bolt
18-22 18-22 13-16
Cylinder head temperature 12. 16 1 2.1 6 9.12 SeIlSOr
Exhaust gar senior 40.50 41-51 30-37
E G R control valve 18-23 18-23 13-17
E G H tube 34-44 35-45 25-33
Detonation sensor 25.34 25-35 18-25
Fuel hose clamp 10-15 010-015 07-1 1
EF %i EC-79