Hyundai Sonata 1991 Shop Manual page 420

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GENERAL
12. Kickdown
Check for continuity between the
H
No continuity
1-
Poor contact, or damaged
(KID)
servo
kickdown servo switch terminal
or disconnected wiring
switch
and the transaxle case.
!
t
[tJ
Replace
the
KID
servo
Continuity
switch
Start the engine, set to the "L"
range, and let the engine idle;
check for continuity between the
I--
Continuity
Poor contact (sticking)
kickdown servo switch terminal
exists
1
and the transaxle case.
NOTE: Be sure the brakes are
Replace
the
KID
servo
applied during this check.
switch.
t
No continuity
~
Normal
13. Transaxle
control unit
(TCU)
Disconnect the harness (both A
f----
The problem
----
Malfunction of the original
and
B
connectors)
from
the
does not
TCU
vehicles TCU. Then connect, via
occur
!
an
intermediate
harness
for
checking, a new TCU to this
Install a new TCU.
harness and make a road test.
t
Consider the original TCU to be
normal.
and
again
check
the
sensors, wiring, etc.
Same problem (as before TCU
exchange) occurs.
45-31

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