honda cr v 19997 2000 User Manual

Electronic Control System
The electronic control svstem consists of a Powertrain Control Module (PCM), sensors, a linear solenoid, and four solenoid
valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions. The PCM is located
below the dashboard, under the kick panel on the passengers side.
97 - 98 Mod€ls
PGM.FIControl Sy3t6m
Throttl€ Poshion SensorSignalVehicle Sp.ed SensorSignal
Engino Coolant TamperetureService Check connectorSonsor Signrl
A/T Control...

Description
PCM
PGM.FIControl System
Throttle Position SensorSignelVehicle Speed SensorSignal
Engin€ Coolsnt TomperatureSen30r SignalService Ch€ck Connectol
A/T Control Svstem
INTERLOCK
Shift Control
Shift ConlrolSolenoid Valve ACONTROL UNITr
RShift ControlSolenoid Valve B
N
Linear SolenoidD
Lock-up Control
2
Lock-up ControlSolenoid valve A1
Lock-up ControlSolenoid Valve BOver-DriveSwitch Signal
Mainshaft Speed SensorSignalE Indicator Light
Countershaft SpeedSensor SigntlSelt-Oiagnosis...

Shift Control
The PCM determines which gear should be selected by various signals sent from sensors, and actuates the shift control
solenoid valves A and B to control shifting. Also. a Grade Logic Control System has been adopted to control shifting in E
anO E (gZ - gg), and E (99 - 00) position while the vehicle is ascending or descending a slope, or reducing speeo.
PositionGearShift Control Solenoid
Valve A
Shift Control Solonoid
Valve B
E, E, Or
E
I stOFFON
2ndONON
3rdONOFF
E orE4thOFFOFF
a2ndONON...

Description
Electronic Control System (contdl
Grade Logic Control System
How it works:
The PCM compares actual driving conditions with memorized driving conditions, based on the input from the vehicle speed
sensor, the throttle position sensor, the barometric pressure sensor (98 model). the engine coolant temperature sensor, the
brake switch signal, and the shift lever position signal, to control shifting while the vehicle is ascending or descending a
slope, or reducing speed.
SIGNALS DETECTED
Driving...

Ascending Control {37 Modol}
When the PCM determines that the vehicle is climbing a hill in E] and E positions, the system extends the engagement
area of 2nd g€ar and 3rd gear to prevent the transmission from frequently shifting between 2nd and 3rd gears, and
between 3rd and 4th gears, so the vehicle can run smooth and have more power when needed.
NOTE:
. Shift schedules stored in ths PCM between 2nd and 3rd gears, and between 3rd and 4th gears. enable the PCMs fuzzy
logic to automatically select the...

Description
Electronic Control System (contd)
Descending Control
When the PCM determines that the vehicle is going down a hill in E and @ positions (97 - 98 models). and in @ posi-
tion {99 - 00 models), the shitt-up speed from 3rd to 4th gear and from 2nd to 3rd (when the throttle is closed) becomes
faster than the set speed for flat road driving to widen the 3rd gear and 2nd gear driving areas. This, in combination with
engine braking from the deceleration lock-up, achieves smooth driving when the...

Circuit Diagram and Terminal Locationsr9T Model
IGNITIONSWITCH
LOC( UPCONTROL
LOCK UPCONTROLSOLEITOIDVALVE B
sf Frc0|lltF0LSOLENOIDVALVE A
sHrFr c0r{TnoLSOLEI{OID VALVE B
UNEASSOLINOID
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Description
Electronic Control System (contd)
Circuit Diagram and Terminal LocationsrgS Model
GNTIONSWITCN
LOCK-UPCONIFOLSOLEIIO D VALVE A
LOCK-UPCONTSOLSOLEI.IO 0 vALvE B
SBIFICONTROLSOLEI€ DVALVE A
SH FTCONTFOLSOLEiDID VALVE 8
LIN€AA SOL€iDIDGNIION SWTCHtGr
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Circuil Diagram and Terminal Locations-gg - 00 Models
GNION SWITCN
LOC( UP C,ONTROLSOLEID D VALVE A
LOCK.UPCONIFO!SOLENOIOVALVE B
SNIFT CONTAOTSOL€NOID VALVE A
SH]FT CONTROLsolEtiroro vArvE B
L NEAF SOLEI{OIO
pG2
IGPI
IGP2
vcc2
rGNloN SWrlCHGI
PCM Conn€clor Tehrial Loaabm
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Description
Hydraulic Control
The hydraulic control system is controlled by the ATF pump, valves, accumulators, and electronically controlled solenoids.
The ATF pump is driven by splines on the end of the torque converter which is aftached to the engine. Fluid from the ATF
pump flows through the regulator valve to maintain specified pressure, through the main valve body, to the manual valve,
directing pressure to each clutch. The valve body includes the main valve body, the regulator valve body, the...