Z-Gl-4 Reading Wiring Diagrams
System circuit diagram/connector diagram
l These show the circuits for each system, from the power supply to the ground. The power supply side
is on the upper part of the page, the ground side on the lower part. The diagrams describe circuits with
the ignition switch off.
Below is an explanation of the various points in the diagram.
) Indicates operating conditions for switches.
The prefix letter indicates the system in which
:he connector is used.
JB: Joint box connections
X : Common connectors
A : Charging system/starting system
connectors
B : Engine control system connectors
C : Gauge control system connectors
D : Wiper system connectors
E : Lighting system connectors
F : Signal system connectors
G : Air-conditioning system connectors
H : Transmission control system
connectors
I : Interior lamp system connectors
J : Audio/radio connectors
K : Power window/power door lock system
connectors
L : Remote control mirror system
connectors
M : Sliding sunroof system connectors
N : Power steering/4-wheel steering
system connectors
0 : Anti-lock brake system connectors
P : Power seat/seat heater system
connectors
Cl : Auto cruise control system connectors
R : Auto adjusting suspension system
connectors
S : Passive shoulder belt control/air bag
system connectors
T : Others
Y : Ground connector
- .
1
\\‘
IGNITION SYSTEM l ENGINE CONTROL 9 harness ground is represented differently
:han a unit ground.
Types of grounds Symbol
Harness
I
-
-
-
-
‘“G:
si-
P
7:’
.I
I
I
.i
-
-
-
f
9
Tiii
zs
LL
Y
a
EE
-
VE Batmy voltage
1 Ve: Battery vm
i
Remark
Termfnal Input Output Connection lo
Test conditkm
colmct voltage Remark
2W
0 Iscvalve lgmtian swdch ON
Approx. iv
-
Idle Appror. 9v
2x
0 Solenoid valve
lgnitlon switch ON
VS
(Purge control) -
IUk
VB
2Y - - -
-
-
@i switch
)N le
I!
C
4
-C
,
,
e
”
3
-C
.
f
-
-
-
)nition switch
)N I I I
I I
I -
22 - - -
- -
-
-
-
luilt in airflow
1eter
lnition swttch
)N
-
VICS: Vata&
Inertia charging
SYStem loaHCl
-
Engine Signal
Monitor: Green
and red lamps
flash
mnin
2H
- I Main relay (w=w I Ignition switch ON
VB
_/I/ - I -
I - 21
25
-7 I - I -
I - , I t 0 Air-flow meter constant
4.5-5.5v 2K
I I I
I
0 I 1 Thr0tlle sensor Accekrator pedal r&eased
4.5-5-W
I I (Power switch)
Accelerator pedal fuUy depessed ov
2M
l-l - I -
-
I -
0 oxygen sensw Ignitia switch ON
ov
Idle (Cold engine) ov
Idle (After “ram-up)
O-l .ov
Increasing engine speed (After warm-up) 0.5v-1 .ov
oeceleratlon
0-0.4v
0 Airflow meter Ignition switch ON
Ap~rox 3 8L
ldk Approx. 3.3 2N
20
2P
0 Intake air ther- Ambient air temperature 20°C (68” F)
mosensor
W W Ap&xox 2 5V
0 water thermosensor Enaine coolant temperature 20°C (68°F)
ADDTOX 2.5\( 20
2R
2s
,.
After “am-up B&w 0 5v
I I I I
- - - - -
0 Sdenoid valve Engine speed below 5.000 rpm Below 1 5v
ww
Engine speed above 5.000 rpm VB
2T I 0 lsolertoid valve
I60 jDOHCl/l20 ISOHCI seconds after en- 1
/ I--
temperature abo& 56°C (136 o F)
(OOHC]/SO”C (122°F) (SOHC]
0 Injector (Nos. 1.3) Other condition at idle VB
Ignition switch ON
Vt7
Idle
VB‘ 2u
2v Engine speed above 2.000 rpm on
decderation (After warm-up) Ve
0 Injector (NOS. 2. 4) Ignition swatch at id& VB
idle
VS.
Engine speed above 2,000 rpm on
deceteratiin (After warm-up) VS
