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Lock-uD Control
From sensor input signals, the TCM determines whether to turn the lock-up ON or OFF and activates lock-up control
solenoid valve A and/or B accordingiy. The combination oI driving signals to lock up control solenoid valves A and B
is shown in the table below.
ShiIt Contlol
The TCM instantaneously determines which gear should be selected by various signals sent from sensors, and actuates
the shift control solenoid valves A and B control shifting. Also, a Grade Logic Control System has been adopted to control
shifting in @
position while the vehicle is ascending or descending a slope, or reducing speed.
w"'u"
Lock-up condition
-\
B
Lock'up OFF
O F F
O F F
Lock-up, slight
ON
O F F
Lock-up, half
O N
O N
Lock up, full
O N
O N
L O C K - U p
d u r i n g d e c e l e r a t i o n
O N
Duty operation
O F F - O N
\
Shift control solenoid valve
t"dil"" d;------\
B
tc!t' tcll
{ 1 s t )
O F F
O N
( 2 n d )
O N
O N
( 3 r d )
O N
O F F
{4th)
O F F
O F F
e
{2nd)
ON
O N
tr
(1st)
O N
O F F
tr
(Reverse)
O N
O F F
I'
(cont'd)
14-19
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Table of Contents
Troubleshooting
