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AT-12
TROUBLESHOOTING
NOTE:
AUTOMATIC TRANSMISSION
- Electric Control
I
•
If diagnostic code
No.
42,
61
.
62
or
63
occur.
the
overdrive
indicator
light
will begin
t
o
blink immedi·
at
ely to
warn
the
driver.
However,
an
impact
or
shock
may
cause the blinking to stop
although
the
code
will
still
be
retained
In
the
ECT
ECU memory
until
canceled out.
•
There
is
no warning for diagnostic code
No.
64.
•
In event of
a
simultaneous malfunction
of
both
speed
sensors
No.
1
end
No.
2.
no
diagnostic
code
will
appear
and fail·safe will
not
function. However,
when
driving
in
..
0
..
range, the
transmission
wl
not
up-shi
ft from
f
irst
gear
regardless
of
the
vehicle
speed.
Trouble
No.
1
Blinking
overdrive indicator light
(while
driving)
Output
diagnosis
code
ISeo page
AT ·81
Code
No.
62. 63,
64
D isconnect
ECT
ECU connector
end
t
here
It
1
1
-
15 n
between
connector
terminal
S
o,
S
:,
s, -
GND
Yes
Try enother ECT
ECU
t
Code
No.
42,
61
No
·-
•
F eulty
speed
sensor circuit
•
Feulty
speed sensor
•
Fauttv
solenoid
circuit
•
Fautty
solenoid
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