Mazda 1990 323 Workshop Manual Supplement page 273

TROUBLESHOOTING GUIDE
K2
minal of EC-AT co
unit, and oscilloscope in-
put terminal to 2J terminal of EC-AT control unit
Check if pulse display is OK
grounding of shield-
6 If OK, go to next step
+ If not OK, repair wiring
* Refer to 1990 323 Workshop Manual (1195lo-89E).
K2-97