Mazda 323 1988 Workshop Manual page 293

TROUBLESHOOTING WITH SST
4B
No. 25, 26, 27 Code illumination (Solenoid Valve)
Is there poor connection at connector in wiring circuit
of indicated solenoid valve?
I
c
Is kignal or voltage of connector for indicated sole-
NO PC: Open or short circuit in wiring harness of indicat-
ed solenoid valve. Emission control unit faulty
YES
Perform after-repair procedure
1
83"04B-021
No. 34 Code illumination (BAC Valve)
Are there any poor c
connectors?
Repair or replace connector
NO
Is the resistance of the BAC
Resistance: 5-20 0
Replace BAC valve
Is there battery voltage at (YG) wire of the BAC
valve connector?
YES
PC: Open or short circuit in wiring harness from (YG)
wire to main relay (for engine control unit)
Is there continuity between BAC valve and engine
control unit?
BAC valve
I
Control unit
B (G wire) 2Q
(Refer to page 48-77)
NO PC: open circuit in wiring harness from BAC valve
to engine control unit
YES PC: + Engine control unit malfunction
l
Short circuit in wiring harness
48-21