TROUBLESHOOTING
AUTOMATIC TRANSMISSION
23A-23
8
<4A/T>
Selector lever
position: D
(Must be done
on a level and
straight road)
(1) Accelerate to
4th range at an
APS output of
1.5 V (opening
angle 20%).
(2) Slowly
decelerate and
stop.
(3) Accelerate to
4th range at an
APS output of
2.5 V (opening
angle 50%).
Data List No.35, 6
The shifting points
correspond with the
M.U.T.-III display and
the APS voltage
(opening angle) and
output shaft speed,
which are described
in the shift pattern.
Problem
during
shifting
−
Shocks, engine
racing
Incorrect
shift
points
−
All points
−
Some points
No
shifting
−
No diagnosis
codes
P1766
Input shaft
speed sensor
system
P1767
Output shaft
speed sensor
system
(1) Accelerate from
1st gear to 4th
gear.
(2) Downshift to 3rd
gear at speed of
50 km/h in 4th
gear.
(3) Downshift to
2nd gear at
speed of 30 km/h
in 3rd gear.
(4) Downshift to 1st
gear at speed of
20 km/h in 2nd
gear.
Data List No.11
(1) 1st
→ 2nd → 3rd
→ 4th
(2) 4th
→ 3rd
(3) 3rd
→ 2nd
(4) 2nd
→ 1st
No
shifting
from 1st
to 2nd, or
no shifting
from 2nd
to 1st
P1773
LR solenoid
valve system
P1775
2ND solenoid
valve system
P1779
1ST without
completion of
shifting
P1780
2ND without
completion of
shifting
No
shifting
from 2nd
to 3rd, or
no shifting
from 3rd
to 2nd
P1775
2ND solenoid
valve system
P1776
OD solenoid
valve system
P1780
2ND without
completion of
shifting
P1781
3RD without
completion of
shifting
No
shifting
from 3rd
to 4th, or
no shifting
from 4th
to 3rd
P1774
UD solenoid
valve system
P1775
2ND solenoid
valve system
P1781
3RD without
completion of
shifting
P1782
4TH without
completion of
shifting
Proced
ure
Pre-test/
operation
conditions
Test/operation
Judgment value
Check
item
Diagnosi
s code
No.
Inspection
procedure if
there is an
abnormality