light MAZDA PROTEGE 1992 Workshop Manual

Z-GI-12 Troubleshooting
Handling connectors
Caution
l Be sure to grasp the connectors, not the wires, when disconnecting them.

1 .Open the rear cover.
2.Lift the tab with a
small screwdriver
and remove the
improperly engaged
connectors will cause
poor terminal contact. A loose terminal will
cause poor terminal
Lift the tab with a
remove the terminal.

1 .Open the cover.
2.Lift the terminal to
Using a matching male
is no looseness in the
female terminal. Verify that terminals are
connector when engaged. 3.Verify that the
terminal IS securely
mounted in the
connector when
3.Lift the tab with a
small screwdriver
and remove the
Lightly pull each wire to
verify that the terminal
does not pull out of the

Troubleshooting Z-Gl-13
el
-
Ill
31
-
I1
Jl
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ver
le
Usina electrical test eaubment -----w - I - Equipment Use Operation Handling precautions
Test lamp Test for locating open or shorted l Connect the test lamp
0 Test lamps use 12V 1.4 or
R circuits. between the circuit being
3.4W bulbs or light- emitting
measured and a ground.
diodes (LED). Using a large
*The
lamp will light if the circuit
capacity bulb may damage the
is energized to the point
CPU.
,.WD,.l
b tested.
Jumper wire
Used to create a temporary l Connect the jumper wire 0 Do not connect the power side
circuit. between the terminals of a directly to a ground as this
circuit to bypass a switch, etc. may burn the harness or
damage electrical
/d<;>‘-
d components.
I
n
Voltmeter
Used for measuring the voltage
l Connect the positive (+) lead l Connect the voltmeter In
of a circuit to locate possible to where voltage is to be parallel with the circuit.
opens or shorts. measured and the negative
0 Set the range to the desired
(- ) lead to a ground. voltage.
l Use the service hole when
measuring the voltage at the
diagnosis connector.
~Tie a thin wire to the posrtive
(+) lead to access narrow
terminals.
Ohmmeter
Ammeter Used for locating opens and
l Zero the ohmmeter. *Zero the meter after switching
shorts in the circuit, confirming
I to the measuring range.
continuity of switches and
checking sensor resistance. &.--
l Before using the ohmmeter,
make sure that the ignition
l Verify that current is not switch is OFF or the negative
flowing through the circuit. (- ) battery cable is
0 Touch the leads to the check disconnected to prevent
points.* burning the ohmmeter.
Used for checking alternator
l Connect the ammeter in l Set the range to the desired
output, current supplied to the series with the circuit by
voltage.
starter, and dark current within a touching the positive (+) lead
l Connect the ammeter in series
circuit. to the power side terminal and
with the circuit. The ammeter
the negative (- ) lead to the
may be burned If it is
Note ground- side terminal.
connected in parallel.
Dark current is the current
flowing through the circuit when
the Ignition switch is OFF.

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

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 /;
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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
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: 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

T.&condition
-t
Off
IQ”&” switch
ON
Whik cranking
lgnitlon switch ON
Test switch at “SELF-TEST”
Lamp illuminated for 3 sec. after ignition
SwiIch OFF-KIN
Lamp not illuminated after 3 sec. collect vdtaQe
ReRlar*
ve
For backup
ov
-
V%
Approx. tov
ov
4 5--5.5v With Self-
D&Q”& Check-
er and system
Vi3 st?lt?ctor Input &PJ
- -
0
0
0
0
0
0
- -
- -
0
0
c
- -
0 connectkfl to mnina
Connection to
Stoplight swtch Test condition
-L 1A
Bake pedal released
IEI
IC Main relay
(FUEL INJ relay) Brake pedal depressed
lQ”ih0” switch ON
___-- P/S Qrc?ss"re
switch
Ignition switch
(START) P/S ON at idle
P/S OFF at idle
A/C switch ON
A/C switch OFF
Cwlng fan operatng (Engine coolant tem-
perature over 97°C (207°F) or dlagnosls
connector terminal TFA grounded) (IG ON)
Fan not ooeralmg (Idle) 1D .self-mag”osls
Checker
(Monitor lamp) A!C switch
coohng fan swtctl
Test switch at “02 MONITOR” at idle
Monitor lamp ilfummated
Test switch at “02 MONITOR” at idle
Monitor lamp not illuminated
Lamp illuminated for 3 sec. after ignition
switch OFF&N
Lamp not illuminated after 3 ser.
Lamp illuminated
Lamp not #lluminated VB
Below 2.w With System
Selector test
VB swtch at
“SELF-TEST”
Eelow 2.5v
VS Blower Control
swttch Blower control switch OFF or 1 st posihon
Blower control swtch 2nd or htgher
position 1E
Malfunction indicator
lamp
NJ
Rear window defroster swtch OFF Rear wmdow
defroster switch
Headkght switch Rear window defroster Switch ON
-2-A - I
tieadlghts ON
Headlights OFF
Neutral positton or clutch pedal
depressed
OlhWS l Wiih Self-
DkQnosls
Checker and
Svstem Selector Self- Diaanosis Buzzer sounded for 3 sec. after ignition
switch OFF-ON
Buzzer not sounded after 3 set 6&w 2.5v
V8 Checke;
(Cede Number) I
ov Ignition swtch
ON NeulraliClutch
switches
. ‘.&h System
Selector test
switch at Buzzer sou”ded
1 Below 2.5V 1
VB
ov -
ov -
ov -
ov -
APprox. ov
or 4 5-5 5v
-
Approx. 2V
-
-
AQWOX. Ov
or 4 5-5 5v
-
APQ~OX 1.5V Buzzer not sounded
I VE
I
Ground (Injector)
Ground
(OUtQUt)
Ground (CPU)
Grou”d (Input)
constant
lgnlti swtch ON
klk “SELF-TEST”
ov
-
Ap~rox O.2V
- - Constant
Co”stant lgnller
1H
Constant
Igntho” swdch ON -
- D&ribulor
(Ne-sIgnal) II
1J
1K
1L
1M
1N -
fgnition switch ON
AX switch ON al idle
NC switch OFF at Idle
System Selector lest switch at
“0-z MONITOR” I -
- VB
5&w 2.w -
Vi3
VB Ignition switch
ON
System Selector test swatch at
“SELF-TEST”
ParkIng brake pulled wth lgndlon swtch ON
(DRL OFF) ov
VB
l DRL: oaytime Running tigms
Idle (DFtL ON) Below 2.5v A/C relay
Idle
-
Ignition swtch ON
-
Distributor
(G-stgnal) [DOHC]
3ignosis
x”“ec1or
,TEN terminal) Idle
3RL relay (canada)
-
Accelerator pedal released
Accelerafor pedal depressed
-
ov
VB
-
Ignition switch
ON rhr0ttte sensor
‘Idle switch)

WIRINQ MAQRAM
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EGI EC-AT mENGINE CONTROL SYSTEM &i EC-AT CONTROL SYSTEM(2/3)
~II;~CONTROL
(SECTION E-3) @+...-BR/w IF) ~BR/W (EM) 1
~~~~j @--- Y/B (F) s Y/B (EM) 1
3F ENGINE CONTROL UNIT
1E
CANADA DOHC
31 3M 3u 3V 2E IL 10 IH 1P 1Q
2A IN 3Q 20
2-01y==---- --~-- _._----.-. ------~---
I I
I I
x? G/O
GM, Y/B
(EM) (EM) I I I
L/Y [FM
MAIN RELAY (FUEL INJ)
(SECTION B-2a) A/C RELAY ILL~l
(SECTION LA&
G)
I-4) Gl
i 1
b 26
REAR
WINDOW
(SECTION DEFROSTER
SWITCH
(SECTION
25 I-l)
\IATIONSTOPLIGHT
SWITCH
3N
(SECTION
F-2) lMIl
‘S
:TII
82-09 DISTRIBUTOR (EM)
2-01 ENGINE CONTROL UNITCEM)
20 2M 2K 21 2G 2E 2C 2A 3~ 3w 3” 3s 3~ 30 3M 3K 31 36 3~ 3C 7A
-I 1
I I I , __ , ,, .,- ,, f 1 I I,
,“I 11 1 ,^ 1 1 I ,” I ., I: B/R 1 v I,.,
I v lb ,I c _ 11: ,S 113 10
IM IK 11 1G 1E
1~ 1A
* W
* R/W B/L O/L~L/Y[L/BIB/LIR/BIW/B(IYY/YIU(/R
3” IT IR IP ,N IL IJ 1H IF 3D lF?
z-10 POWER STEERING
PRESSURE SWITCH (Fl W/L W/L R/BFG/qW/UIL/WIH/Li W
k”,, -L_ .A _ ,, I_ ,^ , _
R/YY/LI * (-‘;--pH/kpqwb( H 1 L L/1 ‘,tl,, * , * , x , * , * , m ,‘,“, * IF’“” ‘,“‘V
2P 2N 2L 2J 2H 2F 20 28 32 3x 3V 37 ~~ ~- --’ -’ -‘ -” 7r =” =(1 3R 3P 39 3L zw 311 Jr JY _I”
I 62-13 SOLENOID VALVE ~2-14
INJECTOR No.t(INJ) 82-15 INJECTOR N0.3(INJ) 82-16 INJECTOR N0.2(INJ)
(PRESSURE REGULATO 82-11
I
EC
VALVE
82-11
12-25 SOLENOID VALVE
wrcs) (INJ)

: WIRINQ MAQRAM
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EGI EC-AT
aENGINE CONTROL SYSTEM Cz EC-AT CONTROL SYSTEM(3/3) 0 -CANADA
b -2c
MAIN
%,E,$$$?@&?%(F,
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GNITION
WITCH
IGSTRUMENT METER
CLUSTER 15A
BACK-UP LIGHTS
(SECTION F-3)
~~~~$~ z,s:EM @-- B/L (F) -0lL (EMi -
5>82-0 1
2P IM
ENGINE CONTROL UNIT 3G 3H
3E IR
:EPT
21 28 2K 2F IT (
Y2-01~==----~-------------~--‘---‘-~~-----~------
B/LG %/%R
(EM) IEM)
1
E/;
:
6 3A
?
‘-01 ENGINE CONTROL UNITfEM) A-02 INHIBITOR SWI!$y
III 1s 10 10 1M IKm 3 IG IE 1C IA 20 2M
2K 21
26 2E 2C
2A
*
W G G/B G/R (Bc) G/ G/W
x llWWlR/I In/LJL/YIL/B B/L R/B
i
3~ 3~ 3” 35 3~ 30 34 3K 31 36 3E 3C
3A
0 L/O Y X L/O * G/O * /L e/o
L L/Y Y/B * * * * * * Y/R @y’ /% a/o
IN 3F 30 38 1 1 ’ I 5 1 n *a
. .
. .
I .’ II’ “‘l-‘-l-’ -I-. 1
’ ’ ’ ” ’ ’ I . . *...
iv ,T ,R IP IN iL IJ ,ti 1F 10 IB 2P 2N 2~ 2J 2H 2F 20 28 32 3X 3”
3T 3A 3P 3N 3L 33 3
1-19 AIRFLOW METER (EM) 82-20 THROTTLE SE+Op 182-23 HOLD SWITCH&+
ttM1 1 162-24 SOLENOID VALVE (EC-AT) &INHIBITOR SWITCH iF)
I
A
__ .._..... -. .._ __._. _ __..... .., .___....__.._ __.. _..~ . . .._...., . . . .

Terminal vdt
wminal lrput
1A -
1B 0
-
1C 0
1D e (ATX) ve: aattefy voltage
1
Connected to
I Test wndition ~cwrect rc4t.gej F&W*
-
0
-
-
3attery
Uain r&y
:FUEL INJ relay) Constant
tgnition swdch V% For backt@
OFF ov
ON V6
Ignition swtch
(START)
Self-Diagnosis
Checker
[monitor lamp)
3 - White crankii npprox 1ov
fgnition switch ON ov
Test swtch at “SELF-TEST’ With Self-
Lamp illuminated for 3 sec. after igmtmn 4.5-5.w Diagnosis Check-
switch OFF-+ON er and System
Selector
Lamp net illuminated after 3 Sec. VS
Test swtch at “02 MONITOR” at idle
i Monitor lamp illuminated 4.5-55v
Test switch at “02 MONtTOR” at idfe
Monitor lamp not illuminated
Malfunction indicator
lamp illuminated for 3 sec. after ignition
Below 2 5v With System
lalllp switch OFF+ON selector test
WLI switch at
Lamp not luminated after 3 sec. VE
“SELF-TEST”
lamp ifluminated BelOW 2.w
Lamp not illuminated VS
Self-Diagnosis Buzzer sounded for 3 sec. after ignrtion
l With Self-
Checker switch OFF-+ON Below 2.5V
Diagm!3s
(code number) Checker and
Buzzer not sounded after 3 set VB
system
Select0 Buzzer sou&?d Below 2 5v l With System
Selector test
I Buzzer not sounded
tgmter Ignition switch ON ov
Idle Appror 0 2v -
Headlight switch Headlights ON
f VB
-
Headlbhts OFF ! ov
Diagnosis
connector
, System Selector test switch at
VS Ignition witch
“02 MONITOR” ON
(TEN terminal)
Rear window
defroster switch
Ground Icalifornia) System Selector tesf switch at
“SELF-TEST”
Rear window defroster watch OFF
Rear window de!roster watch ON
ConSlant QV
ov lgmhon switch
__ ON
VO
ov
- Main relay (canadal fgmtion switch ON VB
AC relay Ignitiin switch ON VB
A/C switch ON at Idle Below 2.5% -
Vehicle speed A/C switch OFF at Gle
/ Vehicle stopped
P/S pressure
switch lgmhon switch ON
P/S ON at idle Iturnino)
I.
P/S OFF at idle I VB Terminal voltage v‘s: Battery vottage
I I
1
Terminal input Output Connected to Test condition comcl voltage Remark
10
0 A/C swatch AIC switch ON Befow25V ignition switch
ON and blower
A/C switch OFF VB I
motor ON
IP
ii Blower control Blower control swtch OFF or 1 St poSItion VB tgnibon switch
switch ON
Blower control switch 2nd or higher
ov
position
1Q
0 Stopltght switch Brake pedal released Below 1 ov
-
IT <; Brake pedal depressed VE
lnhtbitor switch N or P range ov Ignition switch
(P N range) ON
Other ranges VB
Cruise control man Set or Resume swtch ON or vehicle speed lgmhon swtch
switch 8kmih &mph) lower than preset speed &tow 1 5~ ON
(Drwng vehcfe crwse cantrol
OperatiOn)
Fk
z 1v -
3A ’ Throttle Sensor
(Idle switch) Normal conditions
Accelerator pedal released
Accelerator pedal depressed “8
Bebw 1 ov lgnihon swatch
ON
VS
I -
-
- - -
-
-
- - -
D&rib&r
-‘. / b / / (Ne-signal) lgmtion swtch ON
/ ,,,, Approx. OV
or 5v
-
Approx 2v
I ._.
/
28 1
AdlOw meter lgmhon switch ON
Approx 3 BV .,
-
Idle Approx 3 3V
2c j r:
I \’ oxygen sensor fgmtson switch ON ov
1
20 Idle (cold englIIei
Idle (after warn-up)
lncreasma enwe speed (after warm-up) ov
O-l ov -
0 w-1 .ov
_ -
,
Deceleration o-o 4v
Coolmg fan swtch Fan operahng (engine coolant temperature
over 97°C (207’F) or diagnosis connector DV
termmat TFA grounded) -
Fan not operatmg (idle)
Water thermosensor Engine codant temperature L” %, I”” I , ‘Y”8’.“” . . . ...-1.
After warm-up
I
Thrnttb SP”SOi 1 Accelerator pedal released Approx 0.5V
2G .._..._ --..--
-
Accelerator pedal fully depressed Approx. 4 OV
0 ATF thermosensor -XPC (-2o”~)--1x1~c (302°F) aprxox as5-~m lgmhon swtch
ON
ATF temp 20°C (68°F) Approx. 4.6V
13OOC (266°F) Aporox 1.54V
I I I I I I
2H / i, I / Hold switch Hold mode Below 2V Ingbhon switch
Normal mode

j Z WlRiNQ MAQRAM A.. .EC-AT 0 .CANACA
/
l NSTRUMENT CLUSTER & WARNING LAMPS *...WITH PASSIVE SHOULDER BELT
c
BATTERY
0 01 MAIN
BOA
0 0, B (E)
0 (F)
.-I
FLASHER UNIT
SECTION F-l
(SECTION E-3) HEADLIGHTS
(SECTION E-2) INSTRUMENT CLUSTER
ILLUMINATION LAMP
;REFER TO SECTION I-4
k,
JR-06 @
METER
15A
STARTING SYSTEM
(SECTION n-i)
E J&O4 0
WY
Fl
I
INSTRUMENT CLUSTER
OOHC SEYSOR
&
:-04 PARKING BRAKE C-07 WATER THERMOSENSOR
SWITCH (I?) (EMI
(INJI
DOHC

WlRlNQ DIMRAM
IITHOUT
:RUISE CONTROL’ HEADL1GHTS E-l
ILLUMINATION
BULB TRADE NUMBER
HEADLIGHT: 9004 (65/45W)
-01 COMBINATION E-02 COMBINATION E-03 HEADLIGHT LH (F) E-04 HEADLIGHT RH (F: