AUTOMATIC TRANSMISSION ± Troubleshooting <A/T>
23-22
INSPECTION PROCEDURE 10
Large shocks
Probable cause
Shocks accompany shifting from N→D, N→R and during each upshift and downshift. D Malfunction of direct clutch
D Malfunction of brake No. 3
D Malfunction of stop lamp switch
D Malfunction of inhibitor switch
D Malfunction of forward clutch
D Malfunction of valve body
D Malfunction of A/T-ECU
L: Refer to the Transmission Workshop Manual.
Is there a large shock when shifting
from N→R?
Yes
Check the time lag (within 2 seconds).
NG
Check the direct clutch clear-
ance. L
Check the brake No. 3 clearance.
L
No
OK
Check each accumulator. L
Is there a large shock when shifting
from N→D?
Yes
MUT-II SERVICE DATA
D 28 ± Stop lamp switch
OK: ON when brake pedal is de-
pressed
OFF when brake pedal is re-
leased
NG
Inspection Procedure 16 ± Stop
lamp switch system (Refer to P.
23-26.)
No
OK
Check the kickdown cable.
NG
Repair
OK
Check each modulator valve. L
Check each check ball. L
Check each accumulator. L
MUT-II SERVICE DATA
D 37 ± Inhibitor switch
OK: MUT-II display and selector
lever position should match.
NG
Inspection Procedure 14 ± Inhibi-
tor switch system (Refer to P.
23-25.)
OK
Check the time lag (within 2 seconds)
NG
Check the forward clutch clear-
ance. L
OK
Check each accumulator. L
Check the trouble symptoms.
NG
Replace the A/T-ECU.
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