Mazda 323 Workshop Manual Supplement page 178

CONTROL
SYSTEM
F2
Incorrect voltage Possible cause
Always OV
l
ROOM 10A fuse burned
l
Open circuit in wiring from ROOM 10A fuse to ECU termrnal IA
Always OV
I l
Main relay maifunctlon
l
Open or short crrcu~t in wirrng from main relay to ECU termrnal 1 B
Always OV (Srarrer turns)
l
Open or short circuit in wiring from ignition switch to ECU terminal 1C
Always UV
l
Main relay (FUEL INJ relay} malfunctron
l
Open circuit in wiring from main relay to diagnosis connector terminal + B
l
Open or short circuit in wiring from dragnosls connector terminal MEN to
ECU terminal 1D
Always approx. 12V
I
. Poor connection at ECU connector
l
ECU matfunction
Always approx. 5V
l
ECU malfunction
-
I
-
Always below No disptay on Self- . Main relay (FUEL INJ retay) malfunction (Refer to page F3-142)
2.5V Diagnosis Checker
l
Open circuit in wiring from main relay to diagnosis connector termjnal + B
"88" displayed and
l
Open or short circuit in wiring from diagnosis connector terminal FEN to
buzzer sounds con- ECU terminal 1 F
tinuously
Always approx. 12V
l
Poor connection at ECU connector
l
ECU malfunction
Always OV
l
Short circuit in wiring from igniter to ECU terminal tG
Atways OV or approx. 12V
l
Refer to Code No.42 Troubleshooting (Refer to page F2-30)
Always approx. 12V
l
Fuel pump resistor/relay malfunction
Always OV
l
Open or short circuit in wiring from ECU terminal 1 I to resistor/retay
Always below
A/C does not operate
l
AJC relay malfunction
23
l
Open circuit in wiring from ignition switch to NC relay
l
Open circuit in wiring from A/C relay to ECU terminal IJ
A/C switch OFF but
l
Short circuit in wiring from A/C relay to ECU terminal IJ
AIC operates
l
ECU matfunction
Always approx. t2V
Always below 1 .OV
l
Poor connection at ECU connector
l
ECU malfunction
l
Short circurt in wiring from diagnosis connector terminal TEN to ECU termi-
nal 1K
Always approx. 12V
l
Open circutt in wiring from diagnosis connector terminal TEN to ECU termi-
nal lK
l
Open c~rcud in wiring from diagnosis connector terminal GND to ground
Always above 1 .OV
I
l
Open circuit in wiring from ECU terminal 1 M to ground
F2-61