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AUTOMATIC TRANSMISSION
-
Electric
Control
AT-15
Trouble
No.
3
Shift point
too high
or to'o
low
Warm
up angina
Coolant temp:
so•c
1176•Ft
ATf
temp:
so
-
so•c tt22
-
t76°FI
Diagnosis
code
Proceed
to
trouble
No.
1 CAT
-12)
Output
diagnostic code
IS
..
page AT
-81
No indicate
Connect a voltmeter
to the
DG
1esminal
end
body.
Does OG terminal voltage vary with changes
in
throttle
opening?
Yes
No
Is voltage
between
ECT
ECU
terminals
No
Brake signal faulty!
BR
and GNO as
follows?
OV: Brake
pedal released
12V:
Brake pedal
depressed
Yes
•
Computer power source and earth faulty
•
Thronle position signal faulty
•
DG
terminal wire
open
or short
Check voltage between
ECT ECU
terminals
OK
Faulty ECT ECU
PWR
and GND.
Faulty transmi5$ion
Power
Pattern:
t2V
N01mal Pattern:
tv
No
Faulty
pattern
select switch
system
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