Mazda 323 Workshop Manual Supplement page 180

CONTROL SYSTEM
F2
Incorrect voltage
Always below 1 .OV
Possible cause
l
Throttle sensor misadjustment
l
Short circuit in wiring from throttle sensor to ECU terminal IN
l
ECU malfunction
Always approx. f 2V
Atways below 1 .OV (Stopfights OK)
Always below 1 .OV
l
Throttle sensor misadjustment
l
Open circuit in wiring from throttle sensor to ECU terminal IN
l
Open ctrcuit in wiring from throttle sensor to ECU terminal 20
l
Open crrcurt in wiring from stoplight switch to ECU terminal 10
l
P/S pressure switch malfunction
l
Short circuit in wirrng from P/S pressure switch to ECU termrnai 1 P
l
ECU malfunction
Always approx. 12V
Atways below 2.5V (Btower fan OK)
. P/S pressure switch malfunction
l
Open circuit in wiring from P/S pressure switch to ECU terminal I P
l
Open circuit in wiring from P/S pressure switch to ground
l
A/C switch malfunction
l
Short circuit in wiring from A/C switch to ECU terminal 1 Q
l
Poor connection at ECU connector
l
ECU malfunction
Always approx. 12V (Blower fan OK)
l
' A/C switch malfunction
l
Open c~rcurt in wiring from NC switch to ECU terminal 1Q
l
ken circuit H-I winnu from A/C switch to blower control switch
Always below 1.W
l
Open or short circuit in wiring from fan relay to ECU terminal IR
(Electrkal cooling fan UK}
l
ECU malfunctron
Always below 1 .OV (Blower fan OK)
l
Short crrcutt in wiring from blower control swrfch to ECU terminal IS
l
Poor connection at ECU connector
l
ECU malfunction
Always approx. 12V (Blower fan OK)
Always below Illumination lamp
1.w ON when rear
window defroster
switch ON
1
l
Open circurt in wrring from blower control switch to ECU terminat IS
I
l
Open or short circuit rn wiring from rear window defroster switch to ECU
terminal 1 T
ftlumination lamp
never ON
l
Open circuit in wiring from ignition switch to rear window defroster switch
l
Rear window defroster switch malfunction I
Always below 1 .OV (Headlights OK)
l
Open or short circurt
in
wiring from headlight relay to ECU termtnal 1 U
Always below 1 .OV
Always approx. l2V
l
Neutral switch malfunction
l
Clutch switch malfunction
l
Short circuit in wiring from ECU terminal IV to neutral or clutch switch
l
Neutral switch maifunctton
l
Clutch switch malfunction
l
Open circuit in wiring from ECU terminal IV to neutral or clutch swttch
l
Poor connection at ECU connector
93GOFZ789
F2-63