Mazda 1990 323 Workshop Manual Supplement page 237

.
TROUBLESHOOTING GUIDE
KL
I1
NO KICKDOWN
IESCRIP-
*Does not downshift when accelerator depressed more than 7/8 within kickdown range
'ION
TROUBLESHOOTING HINTS]
3 Throttle sensor malfunction or misadjustment
3 Pulse generator malfunction
3 Hold switch circuit shorted
3 Shift solenoid valves stuck (l-2, 2-3, or 3-4)
TEP
INSPECTION
ACTION
1 Check if "00" is displayed on EC-AT Tester with
Yes Go to next step
ignition switch ON
W page K2-106 No
Malfunction Code No. displayed
Check for cause (Refer to specified
check sequence)
w page K2-106
No Code No. displayed
Check main relay and voltage of termi-
nals 2Q and 2s of EC-AT control unit
Voltage:
Approx. 12V (Ignition switch ON)
"66" flashes
Check wiring between 1C terminal of
EC-AT control unit and diagnosis con-
nector
c3 If OK, replace EC-AT control unit
c3 If not OK, repair wiring
2 Connect EC-AT Tester to EC-AT control unit
Yes
Go to Steps 4, 7, 9 and 12 in sequence
Check if all output and input component indica-
tions are correct (Especially hold switch, solenoid
valves, throttle sensor voltage and drum speed)
No
No indication at all lamps
c3 Go to next step
Individual lamp(s) does not illuminate
c3 Check for cause
3
Check if voltage at 2Q and 2s terminals of
Yes
Go to next step
EC-AT control unit is OK
CT= page K2-144
Voltage: Approx. 12V (Ignition switch ON)
2s 2Q
K2-61