Acura 2002 RSX Service Manual page 563

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Electronic Control System
Functional Diagram
The electronic control system consists of the powertrain control module (PCM), sensors, and solenoid valves.
shifting and lock-up are electronically controlled for comfortable driving under all conditions.
The PCIVI recieves input signals from the sensors, switches, and other control units, perform processing data, and
outputs signals for the engine control system and A,/T control system. The A'lT control system includes shift control,
grade logic control, clutch pressure control, and lock-up control is stored in the PCM.
ihe pCM switches the shift solenoid valves and the A,/T clutch pressure control solenoid valves to control shifting
transmission gears and lock-up torque converter clutch.
P C M
Er|gine RPM Sisnal
PGM-FlControl
Throttle Position
Sensor Signal
A/T Gsrr Poshion Indicator
Searential Soortshitt Mode
Positio.r Shift Indicatot
Teinperature sensor Signal
Baromerric Pressure
Sensor Signal
Manitold Absolute
Pressure S€nsor Signal
A/T Control Syslem
S€nsor Signal
Shift Control
Grade Logic Conlrol
. Ascending control
. Descending control
Shift Solenoid Valva A
Sarvic€ checl si9nal
Shift Solenoid Valve B
Shift Solenoid Valve C
EF
D l -
Transmiision lJ
R a n o e l r F -
swiich =
sienal
lfj-
tEl-
Shitt Solenoid Valve D
ch;Ir
q^l.n^i.l
Vrlv. F
Conirol
A/T Clutch Pressure
Control Sol€noid Valve A
Selection Switch Signal
A/TClutch Pressure
ControlSolenoidValve B
Mainshatt Speed
Sensor Signal
A/TClutch Pressure
Control Solenoid Valve C
L,
Countershaft Speed
Sensor Sisnal
Lock-upControl
t
ON/OFF
2nd Clutch T.ansmi$ion Fluid
Pr8!ure Switch Signal
Ssll-diagnosis/
Communication and
Output Function
Vehicle Spood Signel
Dat. Link Connsctor
3rd Clutch Tr.nsmission Fluid
Pr€ssore Swiich Signal
Shitt Look Solenoid
Brake Pedal Position
Switch Signal
Reverse Lock Conrrol
Cruise ControlUnii
Oownshift R€quest Signal
(cont'd)
14-31