MAZDA 323 1989 Factory Repair Manual

RESONANCE DUCT
SOLENOID VALVE’1
AIR CLEANER
ix
%
4.L VACUUM
CHAMBER-1
RESONANCE
CHAMBER DASHPOT
w/r) --CHECK VALVE
(TWO-WAY)
I II 14 J--CHECK-AND-
II l/%x II/ II _ \,\, _.-.,I CUT VALVE
TH
?z% ---{ IGNITER 1
~ Ne-SIGNAL 1/
G-SIGNAL’IU
DISTRIBUTOR AIR VA’LVE
/ WATER
THERMOSENSOR
SHUTTER 7
VALVE * 1 s%
SOHC
% TO ENGINE CONTROL UNIT
‘1 DOHC
‘2 BP
I CATALYTIC CONVERTER /
FU’EL PUMP
FUEL FILTER
(LOW-PRESSURE SIDE)

F OUTLINE
VACUUM HOSE ROUTING DIAGRAM
CHARCOAL CANISTER
BRO,WN


SOLENOID VALVE
(PRESSURE REGULATOR
SOLENOID -VALVE
(vIcs)*2
1 .
i SOLENOl6VALVE
1 (PRESSURE REGULATOR
, CONTROL)
I I
i --------- --------I---------------_I
*1 BP
*2 DOHC
F-6 uJuut-A-uuI

EGI MT n ENGINE CONTROL SYSTEM (i/3) CD.. OOHC 0 . ..CANAOA 3-l
MAIN
lOA @
HERMOSWITCW
SECTION B-3)
l-01 ENGINE CONTROL UNIT (EM)
iU 1s
IQ IO it4 1K 11 16 IE 1C ,A 61-02 MAIN RELAY (~1 2Y 2W 2U 25 28 20 2M 2K 21 26 2E 2C 24 81-03 CIRCUIT OPENING
(FUEL INJ)
R/0 O/L G/B G * -G/Y )c G/W Y/B
pL/W R
l -G/ x “y W 3/LG 0/O

c>. .DOHC EGI MT wENGINE CONTROL SYSTEM (2/3) 0 _. .CANADA+11
ENGINE CONTROL UNIT
DOHC
2E @ 2w 2x 2s 2T 2U 2V
@
El-01te ________ _________--___---_-_--------
_--____- I _______--_----__------------
L/W
(EM)
1 1
OXSTRIEUTOR W/R (EM)
%T
A
w
l-01 ENGINE CONTROL UNITfEM) El-09 DISTRIEZJTOR IEM) 31-10 POWER STEERING
1U IS 10 10 It4 IK 11 IG iE IC 1A 2Y 2w au 2s 2Q 20 2M 2lc 21 26 2E PRESSURE SWITCH (F)
R/B O/L G/0 G * G/Y * G/W Y/B V L/R * L/O Y “rp L/W R * -G/
l-l 1 ISC VALVE (EM)
l-i8 WATER Tt+ERMOS~~;Sa~Bl-25 SOLENOID VALVE
wcs) (1~~1
pi&q te/klw/R[

EGI MT l ENGINE CONTROL SYSTEM(3/3) <>. .DOHC
INSTRUMENT
(SECTION E-3)
EXCEPT
SECTION G) LAMPS
(SECTION 1-4)
-01 ENGINE CONTROL UNIT(EM1
1” is 10 10 iw 1K 11 1G 1E ic 1A 61-19 AIRFLOW METER (EM)
2Y 2w 2” 25 20 20 2M 2K 21 26 2E
2c 2A
X G/W Y/B V L/R * i/o Y G/ x ‘I;’ W /L B/O
L/B * W/B W/Y W/R * W/L Y/B G/O X R/B R/L G/ * “F’ P /0 B/O
1.l 1H IF ID IS
22 2x 2v 2T 2R 2P 2N 2L 2J 2H 2F 20 26
-20 THROTTLE SENSOR 81-21 CLUTCH SWITCH fF)
(EM) El-22 NEUTRAL SWITCH (EM1

<>. .DOHC EGI EC-AT l ENGINE CONTROL SYSTEM 6, EC-AT CONTROL SYSTEM(1/3)
(SECTION n-i)
DIAGNOSIS CONNECTOR
(SECTION U)
SHIELD WIRE
TACHOMETER
2-01 ENGINE CONTROL UNIT(EM) 82-02 MAIN RELAY (E)
,IJ 23 113 10 1” 1K 11 1G 1E 1C 1A _
20 2M 2K 21 26 2E 2C 2A 3~ 3W 3” 35 30 30 3M 3K 31 36 3E 3C 3A (FUEL INJ)
* w G G/B G/A (‘c) G/ G/W Y/B V L/R
W/L W/L R/E G/ W/B L/W R/L W 0 L/O Y * L/O X G/O X kBc Y/W Y /L E/O

EGI EC-AT eENGINE CONTROL SYSTEM &i EC-AT CONTROL SYSTEM(2/3)
DISTRI8UTOR -W/R IEM) ::
MAIN RELAY [FUEL INJI
(SECTION B-2d
I-4)
F-2)
@
t-01 ENGINE CONTROL UNIT (EM) 82-09 DISTRIBUTOR (EM)
X L/O x G/O
!-17 INJECTOR N0,4(INJ) 82-18 WATER THERMOS:NSyFB2-25 SOLENOID VALVE
(vIcs) (INJ)

<>. .DOHC
EGI EC-AT iENGINE CONTROL SYSTEM &i EC-AT CONTROL SYSTEMt3/3)
STARTING SYSTEM
(SECTION A-1)
12-01 ENGINE CONTROL UNIT (EM) A-02 INHIBITOR SWITCH
1U IS 10 10 it4 IK 11 1G 1E IC 1A F)
* W G G/B G/R ‘8~)-~/YGh ~113 v L/R x L/5 x G/O *
*
R/W 6/L O/i L/Y L/B B/L R/B W/E W/Y W/R L L/Y Y/0 * * * * *
I” IT IR 1P 1N ii iJ IH 1F 10 13
12-19 AIRFLOW METER (EM) 52-24 SOLENOID VALVE (EC-AT) GINHIEITOR SWITCH (~1
I

OUTLINE F
ENGINE CONTROL UNIT (ATX)
The engine control unit (ECU) is united with the EC-AT control unit for simplification of the system.
PREVIOUS
I
EC-AT CONTROL UNIT
OUTPUT DEVICES
ENGINE CONTROL
I I MALFUNCTION DISPLAY FUNCTION
I
L- ------ -------- ----__ __J
NEW ENGINE/EC-AT CONTROL UNIT
-----------m--e-
I
1
1
4
I I
OUTPUT
*
h
T I
NPUT SIGNALS I )c
I ENGINE CONTROL
‘I
FAIL-SAFE FUNCTION
NPUT SIGNALS I EC-AT CONTROL
I DEVICE!
OUTPUT DEVICE:
23UOFX-01
Signals input to the combined engine/EC-AT control unit are classified into engine and EC-AT control signals within the unit.
The operation of the engine control and EC-AT control are unchanged from the previous model.
F-l 3

F OUTLINE
A comparison of the new and previous models is as follows.
Engine Control Unit Terminal Relation Ship Chart
Connected to
Headlight switch Terminal
Connected to Terminal
New Previous New Previou
1H IU
Water thermosensor 2E 2Q
Diagnosis connector
(TEN terminal) / II 1 IK 1 1 Throttle sensor
Rear window defroster switch
I I 21 2K
Ground (California)
Main relay (Canada)
A/C relay
Vehicle speed sensor
P/S pressure switch
A/C switch
Blower control switch 1K 2H
IL 1J
1M --
1N 1P
10 IQ
1P 1s Distributor
(G-signal) [DOHC]
Intake air thermosensor
Solenoid valve
(Purge control)
Ground (Injector)
Ground (Output)
Ground (CPU) 2J 2G
2K 2P
20 2x
___
Stoplight switch 1Q 10
Ground (Input)
1 I I 1 ! 3D ! 2D
Cruise control main switch
1 lS / - II8cRalnardega,y
Throttle sensor
(Idle switch)
Distributor
(Ne-signal) 1T 1N
2A 2E
2B 20
2C 2N Solenoid valve
(VICS)
--.-- I_-
Solenoid valve
(Pressure regulator) [BP] 31 2s
-- -_
3M 2T
Airflow meter
Oxygen sensor
-
Fan switch 1 2D 1 IR 1 1 lniector (Nos. 2, 4) I 3v I 2v
23UOFX-01 I
F-l 4