wiring NISSAN 300ZX 1984 Z31 Engine Fuel And Emission Control System Workshop Manual

ENGINE FUEL &
- EMISSION - CONTROL SYSTEM
SECTION EFaEC
CONTENTS
PRECAUTIONS ..
COMPONENT PARTS LOCATION
ECCS DIAGRAM
. . .
ECCS CHART ..
ECC.S WIRING DIAGRAM . . ..
FUEL FLOW SYSTEM DESCRIPTION .
AIR FLOW SYSTEM DESCRIPTION ....
E C C S. DESCRIPTION . . . . ...
DIAGNOSTIC PROCEDURE . ..
SE LF-D I AGNOSIS ..
..
.. ..
..
..
..
...
ELECTRONfC CONTROL SYSTEM INSPECTION
MIXTURE RATIO FEEDBACK SYSTEM INSPECTION
. ,
FUEL SYSTEM INSPECTION
TURBOCHARGER
. ... ..
INJECTOR COOLING FAN (VG30ET) .
PRESSURE REGULATOR CONTROL
CRANKCASE EMISSION CONTROL SYSTEM
. . . .
EXHAUST EMISSION CONTROL SYSTEM . . ...
EVAPORATIVE EMISSION CONTROL SYSTEM . . .
SERVICE DATA AND SPECIFICATIONS (S DS). . . . . . .
. . EF&EC- 2
. EF&EC- 3
EF & EC- 4
EF&EC- 6
EF&EC- 8
.. EF & EC-10
EF
& EC-11
, EF&EC-13
EF
& EC-28
EF
& EC-35
EF
& EC43
EF & EC-60
EF
& EC-63
EF
& EC-66
EF
& EC-69
EF
& EC-72
. . EF & EC-74
EF
& EC-75
, EF&EC-76
EF & EC-79

E.C.C.S. WIRING DIAGRAM
i-
1
= e Y 2
UI
EF & EC-8

E.C.C.S. WIRING DIAGRAM
I'
.
...
.
SEF747B
EF & EC-9

DIAGNOSTIC PROCEDURE
Driveabil
1. Inspect engine and E C C.S. for air leaks,
proper electrical connections, etc
1) Check all hoses and ducts for air leaks
2) Check air cleaner for clogging
3) Check harness connectors for proper connec-
tions
4) Check ignition wiring
5) Check gaskets for leaks at all air intake com-
ponents
6) Check E G.R valve operation
7) Check air regulator operation
2 Perform E C C S self-diagnosis
Follow the procedure in E CCS SELF-
DIAGNOSIS (Page EF & EC-35)
3 Check idle speed and ignition timing
a. Prepare the following conditions:
Headlampswitch' OFF
Heater blower: OFF
Air conditioner switch: OFF
Front wheel (Power steering model):
KEEP STRAIGHT AHEAD
b. Warm engine to operating temperature.
Check
and adjust as follows
[VG30E engine (Without turbocharger)]
1) Stop engine and disconnect idle-up solenoid
valve harness connector
Idle-up solenoid
2) Start engine and race engine two or three times
under no-load, then run engine
at idle speed
(Cont'd)
3) Check idle speed
M/T & A/T (in "D" position)
700250 rpm at sea level
650250 rpm at high altitude condition
If necessary, adjust to the specified
speed by
turning idle speed adjusting screw
I, SEF6456
4) Stop engine and connect idle-up solenoid valve
harness connector
5) Start engine and check ignition timing with
a
timing light
20ai2" B.T.D.C.
If necessary, adjust ignition
timing by turning
distributor
[VG30ET engine (With turbocharger)]
1) Race engine two or three times under no-load,
then run engine at idle speed
2) Check idle speed.
M/T: 70W50rpm
A/T: 650k50 rpm (in "D" position)
EF & EC-30

DIAGNOSTIC PROCEDURE
c
Engine Startability
1 Check starting system and battery
charging system NG 4 Repair or replace components as necessary 1
OK I
__c NG 3 Check ignition system
NG 2 Check fuel level Supply fuel
OK 1
Repair or replace components as necessary
I
4 Perform E C C S sel Repair or replace components as necessary
5 Perform electronic control system inspection
Locate and repair
1. Check starting system and battery charging
1) Check starter operation
2) Check battery voltage.
2 Check fuel level
3 Check ignition system.
1) Check ignition wiring
2) Check distributor rotor head
3) Check spark plug
4 Perform
E C C.S. self-diagnosis. Follow the
procedure in E.C.C.S. SELF-DIAGNOSIS (page
Perform electronic control system inspection.
Check the following using circuit
tester.
system
Repair or replace as necessary.
If fuel level is low or empty, add fuel
EF & EC-35)
5
Injector circuit
Air regulator circuit
E G.R control solenoid valve
Follow the procedure
in ELECTRONIC CON-
TROL SYSTEM INSPECTION (page EF & EC-
43)
Inspect engine and E CCS for air leaks
Refer to DRIVEABILITY
EF & EC-34