Electronic Control System; Lock-Up Control; Shlft Control - Honda Prelude 1993 Service Manual

Description
Electronic Control System
Eloctror c Contlol Systom
The sloctronic control system consists ot the Transmission Control Module {TCM}, sensors, and 4 sol€noid valves. Shitting 8nd
lock-up ars sloctronicslly controllsd for comfortable driving under sllconditions,
The TCM is located bslow the dsshboard, behind the right side kick panelon the passengar's sida,
Shlft Control
Gstting a signslfrom each sensor, the TCM determines the appropriate gear and activates shift controlsolenoid vavos A and/or
The combination of driving signals to shift controlsolenoid vafues A and B is shown in the tsble below.
\Shitt control solenoid valve
A
B
Position (gesr)
\
f
trstt
ON O F F
@a'at ON O N
1o.-ll os-ltrstt
OFF
ON
I o.-ll o.-lrznar
ON ON
15.-ll o.-lts,ar
ON OFF
E
(4th)
OFF OFF
tr
ON OFF
Lock-up Contlol
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 accordingly.
The combination ot driving signals to lock-up controlsolenoid valves A and B is shown in th6 table below.
\
Solenoid valve
t*"*"-*----\
A
B
Lock-up OFF
urr
OFF
Lock-up, slight
ON
Duty operstion
OFF 1) ON
Lock-up, hstf
ON ON
Lock-up, full
ON ON
LOCI(-Up
during dec6leration
ON
Duty operation
OFF <J ON
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