Mazda 1990 323 Workshop Manual Supplement page 271

TROUBLESHOOTING GUIDE
K2
3 ENGINE STALLS WHEN SHIFTED TO D, S, L, AND R RANGES
3SCRIP- *Engine stalls when shifting from N or P range to D, S, L, or R range and strong shift shock
ON
*Engine will start and run in P and N ranges
ROUBLESHOOTING HINTS]
1 Engine idle speed misadjusted
I Stoplight switch or circuit shorted
I Inhibitor switch worn or misadjusted
1 Pulse generator malfunction
I Lockup solenoid stuck
I Lockup control valve stuck
1 Powertrain slippage (Forward clutch)
1 Torque converter worn
IP
INSPECTION
ACTION
Connect EC-AT Tester to EC-AT control unit Yes
Go to Steps 3, 6, 9, 12, 15 and 16 in
Check if all output and input component indica- sequence
tions are correct (Especially inhibitor switch, stop-
light switch, lockup solenoid valve and drum
speed)
No
No indication at all lamps
+ Go to next step
Individual lamp(s) does not illuminate
c3 Check for cause
Check if voltage at 2Q and 2S terminals of
Yes Go to next step
EC-AT control unit is OK
c? page K2-144
Voltage: Approx. 12V (Ignition switch ON)
2s 2Q
No Repair wiring
Drive vehicle above 80 km/h (50 mph) in D
Yes Go to Step 6
range
OD
Check if voltage at 2K terminal of EC-AT control
unit is OK
c7 page K2-144
Voltage: Approx. 12V
(Lockup solenoid ON [Lockup])
2K
No
Go to next step
K2-95