MAZDA 323 1989 Factory Repair Manual

Troubleshooting Z-Gl-I 5
Measuring continuity/resistance -
Touch the ohmmeter leads to the switch terminals to check
continuity.
Caution
Verify the operating state of the switch before checking
continuity because readings vary accordingly.
Remark
The negative (- ) lead of the ohmmeter is connected
to the positive terminal of the internal ohmmeter
battery. The positive (+) lead to the negative terminal
of the battery. Continuity is checked according to the direction of the positive
(+) and negative (-) leads of the ohmmeter in the circuit
containing the diode.
Connection Continuity
Yes
NO
Verify the operating state of the sensor before checking
resistance because readings vary accordingly.
1. Short between the terminals with a jumper wire to discharge
the capacitor.
2. Set the ohmmeter range to xl Ok Q and connect it to the
capacitor terminals.
3. The capacitor is good if the needle of the ohmmeter swings
once and returns to it original position.

II-GM6 Troubleshooting
Finding short circuits
Shorts occur between the power(positive) and ground(negative) sides of a circuit.
Therefore, finding a shdit circuit requires determining how the circuit is routed.
Circuits not connected to control unit
Examples
Indication
0 Fuse melts. Finding short circuit
0
Test lamp 1. Remove the fuse and
main fuse of the circurt.
2. Disconnect all connectors
of electrical components
in the circuit.
3. Attach a voltmeter or test
lamp to the fuse box and
reconnect each
connector, beginning
nearest the power
source.
4. Check the voltmeter or
see if the test lamp lights
as the connectors are
connected. Finding short circuit
,,{:““o
1. Remove the fuse and main
fuse of the circuit.
2. Disconnect all connectors of
/ electrical components in the
circuit.
Test lamp 3. Attach a voltmeter or test
lamp to the fuse box and
reconnect each connector,
beginning nearest the power
4. Check the voltmeter or see
if the test lamp lights as the
connectors are connected.
Sensor/switch
1. Attach the test lamp or
voltmeter to the CPU
connector.
2. Connect to the swrtch/
sensor connector.
3. Check the voltmeter or see
if the test lamp lights.
A short has occurred where voltmeter
reads OV or the test lamp goes out,
- Short location
Battery Short (A)
l Main fuse melts.
L* Short(B)
0 The motor operates regardless
of whether thermoswitch ON
or OFF when the ignition
switch is ON. Short (C)
lotor
M
P The-
tmo-
switc *The fuse is not melted.
@The main fuse melts when the
ignition switch and thermo-
switch are ON and the relay is
operating. Short (D)
Circuits connected to control unit
-T Examples
Indication
l Fuse melts.
- Short locatior
I
ignition switch
I
Fuse R-l Short (A)
J+L--l
Short (A) l Solenoid A operates normally
when the ignition switch is
ON.
9enold m rfr solenok
;<
A) u a(B) ’ Short (6)
l The CPU transistor burns out
when the ignition switch is
turned ON. Short (C)
l The CPU thinks the switch is
ON because the same
conditions exist as when the
switch is ON.
*The CPU senses the sensor
to be 0 R because the
conditions exist as when
resistance value is 0 R
*The CPU equipped with the
self-diagnosis function output
the malfunctron code. Short (0)
Swltcl1 ml
Short (E) Z-16

This page left intentionally blank

: WIRINQ DIAQRAM
l GROUND POINT
Y WIRING ORDER INTO JOINT CONNECTOR MAY BE CHANGED
JC-0
1 JOINT CONNECTOR (F) JC-02 JOINT CONNECTOR (F) JC-03 JOINT CONNECTOR (F)
r-9 6-l e-7 e-l r-l r-l
B B 8 B B B B B B B B B B B B
JC-04 JOINT CONNECTOR (EM) JC-06 JOINT CONNECTOR (EM1 JC-09 XICIIN; CONNECTOR (R)
m -
B B B B B
JC-12 JOINT CONNECTOR (R)
(PROTEGE) JC-13 JOINT CONNECTOR (R)
(PROTEGE)

EMISSION
INSTRUMENT PANEL

HARNESS COLOR :
FRONT m
INSTRUMENT PANEL!“.:“-“. REAR ENGIN-
WIRING’ DIAGRAM 2
I
JC-13

This page left intentionally blank

WIRINQ DIAQRAM 2
-CURRENT FROM BATTERY
W II f”‘l FCTRICAL WIRING SCHEMATIC _1_=;!:: %% :% I’*
BATTERY
P-
f
30A HEAD SYSTEM NAME
-a
c------
15A TAIL I
t-
BOA
MAIN
7 ST /;
(i
IG
:
:
1
:
I
20A ?--
AD FAN
_-. --
VW/B : I
I
I
I TRUNK COMPARTMENT
l LAMP I-3
:
I ( - n COURTESY LAMPS I-3
I
1OA
3EAR WIPER I
-- ---- L,G--/-~~-.=/zzI~~~
l REAR WIPER 6 WASHER D-3
20A WIPER
30A HEATER
,-w ---- L,w-l;c::::
I
INSTRUMENT CLUSTER
l & WARNING LAMPS C
15A METER
-----+yy _---
IOA ROOM
-1
t
----------.mBUCK-UP LIGHTS F-3
20A STOP
-G/W i - m HORN F-3
1
I
F-2
/--------%CRUISE CONTROL SYSTEM 0
. l SHIFT-LOCK SYSTEM
15A
HAZARD
I-- ------. H
--- _------
TURN 6 HAZARD
--o----B/R ; n FLASHER LIGHTS F-l
I
IPOWER DOOR LOCK K-;
’ PASSIVE SHOULDER BELT s
-mCONTROL SYSTEM
+-B/R--+-/ “Yr. I YV.LI, T.AI1a.A
---------B/W----~-i-t------. n P,-&,ER WINDOW
K-l
I
1
I I 15A ENGINE
- - I
:-,-..-L ----.- T -------- B,wl--‘-
; 30A FUEL INJ ’ a...
I- W/G ’ --------.=ENGINE CONTROL SYSTEM y-2
t ----------e--e-_ I--- ---_ .w-.w-.m-.
I
I t
: I 0
WDIGITAL CLOCK I-l
,
I 20A DEFOG I r-- WINDOW DEFROSTER 1-1
B/L I -- mCIGARETTE LIGHTER I-l
:
_ mAU’)IO SYSTEM
i----a,w-.--15A RAo1o -.-L,e-i~---i--mPOWER J
OUTSIDE MIRRIOR L
30A COOLING FAN L- ------------.
l COOLING FAN SYSTEM ;-4
B/R-p-
l STARTING SYSTEM A-l

I II . . . . . m- I.--..--
n 3TARTING SYSTEM A-l
MAIN
INSTRUMENT
ENGINE CONTROL
(SECTION 8-2~)
CRUISE CONTROL
-01 STARTER (E)
A-02 INHIBITOR SWITCHA- STARTER INTER-
(F) LOCK SWITCH (F)
6

HARNESS COLOR : FRUN I - Cm-*m= -
I
FUSE BOX
I
Z-23
STARTER
INTERLOCK
SWITCH

I ww *. ..l.W Y.#WY”W-&m
aCHARGING SYSTEM
A-2
ALTERNATOR
-04 ALTERNATOR (El A-05 ALTERNATOR (E)
Z-24