Mazda 1990 323 Workshop Manual Supplement page 188

K2
ELECTRONIC CONTROL SYSTEM COMPONENTS
COMPONENT DESCRIPTIONS
Part name
Function
EC-AT control unit
Regulates shift points and lockup points according to sig-
nals from various sensors; sends ON/OFF signals to sole-
noid valves
Pulse generator
Vehicle speed sensor
Throttle sensor
Idle switch
5
2 Inhibitor switch
-
Hold switch
Stoplight switch
Water therm0 signal
ATF thermoswitch
Solenoid valve
Detects reverse and forward drum revolution speed
Detects vehicle speed
Detects amount of throttle valve opening
Detects throttle valve fully-closed position
Detects position (range) of gear selector
Sets Hold mode
Detects use of service brakes
Indicates engine coolant temperature
Detects automatic transaxle fluid temperature
Switched ON/OFF by electrical signals from EC-AT control
unit; regulates shifting and lockup actuation by switching oil
passages
I-2 For l-2 shift (1 st gear -+ 2nd gear: OFF-ON)
2-3 For 2-3 shift (2nd gear -+ 3rd gear: ON-OFF)
5
cl
3
3-4
For 3-4 shift (3rd gear + OD: OFF-ON)
3
Lockup For lockup (lockup at ON)
Illuminates when Hold mode selected
Hold indicator Flashes when malfunction detected as result of self-
diagnosis
No load signal Send no load signal (P and N ranges) to engine control unit
03UOK2-OO!
-
K2-12