Mazda 1990 323 Workshop Manual Supplement page 191

SELF-DIAGNOSIS SYSTEM
KZ
SELF-DIAGNOSIS SYSTEM
The EC-AT control unit has built-in self-diagnosis, fail-safe, and warning code display function for the main
input sensors and all of the output solenoid valves.
i
SELF-DIAGNOSIS FUNCTION
WITH TACHOMETER
WITHOUT TACHOMETER
r
__--_-_
ON (ILLUMINATED)
FLASH
CYCLE
OFF (NOT ILLUMINATED)
If a malfunction occurs in any of the EC-AT system components described below, the HOLD indicator flash-
es to warn the driver of the malfunction.
l
Vehicle speed sensor.
l
Throttle sensor.
l
Pulse generator.
l
l-2 shift solenoid valve.
l
2-3 shift solenoid valve.
l
3-4 shift solenoid valve.
l
Lockup solenoid valve.
If a condition, as shown in the table below, exists, the EC-AT control unit judges that the component has
a malfunction.
Component
Vehicle speed sensor
Throttle sensor
Pulse generator
Solenoid valve
Conditions for judgement of malfunction
No input signal from speed sensor while driving at drum speed above 600 rpm in D, S, or L range
Open circuit when accelerator pedal depressed (idle switch: OFF) or incorrect adjustment
No input signal from pulse generator while driving at 40 km/h (25 mph) or higher in D, S, or L range
Open or short-circuit of transistor within EC-AT control unit or solenoid valve wire harness
03lJOK2-01,
K2-15