Mazda 323 1988 Workshop Manual page 219

TROUBLESHOOTING WITH SST
4A
No. 26, 27 code illumination (Solenoid Valve)
Is there poor connection at connector in wiring circuit
of indicated solenoid valve?
Repair or rep,ace
I
NO
I
PC:
Is signal or voltage of tonne
noid valve OK?
Open or short circuit in wiring harness of
indicated solenoid valve
Engine control unit faulty
YES
Perform after-repair procedure
No. 34 Code Illumination (SAC valve)
Repair or replace connector
1
NO
Is the resistance of the BAC valve OK?
Resistance; 5-20 Q
Replace BAC valve
Is there battery voltage at (B
valve connector?
PC: Open or short circuit in wiring harness from (Bw)
wire to main relay (for engine control unit)
I
YES
Is there continuity between BAC valve and engine
control unit?
BAC valve
1 Engine control unit
B (G wire)
I
20
(Refer to page 4A-62)
NO PC: Open circuit in wiring harness from BAC valve
to engine control unit
PC: Engine control unit malfunction
Short circuit in wiring harness
4A-19