Mazda 1990 323 Workshop Manual Supplement page 262

K2
TROUBLESHOOTING GUIDE
iTEP
INSPECTION
ACTION
13 Disconnect 20.pin connector of EC-AT control
Yes
Try known good EC-AT control unit and
unit
go to next step
Apply 12V to 2E, 2G, 21 and 2K terminals and
check if operation sound (clicking) of solenoid is
heard
No Replace solenoid valve
14 Apply 12V to 2K terminal of EC-AT control unit Yes Go to next step
Start engine in P range and let it idle
Shift to D range and check if engine stalls
No Replace lockup solenoid valve
15 Check if voltage at 2A and 2T terminals of Yes Go to Step 16
EC-AT control unit is OK
w page K2-144
6 If OK, go to next step
* If not OK, repair wiring
w page *F-143 nection at connectors
sistance between 2J terminal and 2L
EC-AT control unit is OK
Resistance: 200-4003
* Refer to 1990 323 Workshop Manual (119510.89E).
K2-86