Mazda 323 1988 Workshop Manual page 286

4B
TROUBLESHOOTING WITH SST
If a warning code number is illuminated on SST, check the following chart along with the wiring diagram,
No. 01 code illumination (Ignition Pulse)
PC: Possible Cause
Are there any poor tonne
connectors?
Repair or replace connector
NO
Is resistance of ignition coil OK?
Resistance: Primary 0.72-0.88 R
Secondary 6-30 kn
Replace ignition coil
YES
is there continuity between i
wire and engine control unit (1M) terminal?
PC: Open circuit in wiring harness from ignition coil
to engine control unit (1 M) terminal
iYES
Is engine control unit (1M) terminal voltage OK?
(Refer to
page
48-76)
PC: Short circuit in wiring harness
YES
PC: Engine control unit malfunction
No. 03 Code Illumination (G Signal)
Repair or replace connector
NO
Measure (1 N) terminal voltage of engine control
ov
unit at idle. (Refer to page 48-76)
t-
PC:
- Open circut in the wiring harness from (IN) terminal
of engine control unit to distributor.
Malfunction of G signal generator
1 Approx. 3.OV
PC: Engine control unit defective
48-14