Mazda 1990 323 Workshop Manual Supplement page 261

TROUBLESHOOTING GUIDE
K2
'TEP INSPECTION ACTION
9 Drive vehicle above 80 km/h (50 mph) in D Yes
Go to Step 14
range OD
Check if voltage at 2K terminal of EC-AT control
unit is OK
D page K2-144
Approx. 12V: Lockup solenoid ON (Lockup)
2K
4
No
Go to next step
IO Check if continuity of transistors in EC-AT control
Yes Go to next step
unit is OK
terminals of EC-AT control unit and ground is
Resistance: 13-270
Resistance: 13-27Q + If OK, go to next step
+ If not OK, repair wiring
K2-85