honda cr v 19997 2000 User Manual
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E] or E Position (97 - 98 Models), and D Position (99 - 00 Modelsl
1. lst Gear
Fluid flow through the torque converter circuit is the same as in E] position. Line pressure flows to the manual valve
and the modulator valve. Line pressure changes to modulator pressure (6) at the modulator valve and to line pressure
{4) at the manual valve. Modulator pressure (6) flows to the left end of the 1-2 shift valve and the 3-4 shift valve
because shift control solenoid valve A is turned oFF and B is turned oN by...](http://img.usermanuals.tech/thumb/34/48204/w64_honda-cr-v-19997-2000-service-manual-548.png "Page 549
E] or E Position (97 - 98 Models), and D Position (99 - 00 Modelsl
1. lst Gear
Fluid flow through the torque converter circuit is the same as in E] position. Line pressure flows to the manual valve
and the modulator valve. Line pressure changes to modulator pressure (6) at the modulator valve and to line pressure
{4) at the manual valve. Modulator pressure (6) flows to the left end of the 1-2 shift valve and the 3-4 shift valve
because shift control solenoid valve A is turned oFF and B is turned oN by...")
3. 3rd Gear As the speed of the vehicle reaches the prescribed value. shift control solenoid valve B is turned OFF by the PCM. Shift control solenoid valve A remains ON. Modulator pressure (6) flows to the right end of the 1-2 shift valve and the left end of the 2-3 shift valve. The 2-3 shift valve is moved to the right side by modulator pressure (68) The 2-3 shift valve covers the port to stop line prsssure (5) to the 2nd clutch. and uncovers the 3-4 shift valve as the 2-3 shift valve is moved to the right side, Line pressure (5) becomes 3rd clutch pressure (30) at the 3-4 shift valve. The 3rd clutch pressure (30) is applied to the 3rd clutch, and the 3rd clutch is engaged. Fluid flows by way of:- Line pressure (4) - CPB Valve - Line Pressure (5) * 1-2 Shift Vaiv€ - Line Pressure (5) * 2-3 Shift Valve - Line Pressure (5) * 3-4 Shift Valve - 3rd Clutch Pressure (30) * 3rd Clutch The hvdraulic Dressure also flows to the 1st clutch. However, no power is trsnsmitted because of the one-way clutch. NOTE: . When used, |eft or right indicates direction on ths hydraulic circuit. . The hvdraulic circuit shows the 97 - 98 models (7 positions); the99 - 00 models (6 positions) is similar. (contd) 14-35 www.emanualpro.com
Description
Hydraulic Flow (contd)
4th Gear llQ! or E Posirion)
As the speed of the vehicle reaches the prescribed value. shift control solenoid valve A is turned OFF by the pCM,
Shift control solenoid valve B remains OFF. Modulator pressure (6) flows to the left end of the 1-2 shift valve and theleft end of the 3-4 shift valve. Modulator pressure (64) in the left end of the 1-2 shift valve equals modulator pressure(68) in the right end of the 1-2 shift valve. The 1-2 shift valve remains at left side by the tension of the valve spring.The 3-4 shift valve is moved to the right side by modulator pressure (6A). The 3-4 shift valve covers the pon to the 3rdclutch and uncovers the port to the 4th clutch as this valve is moved to the right side, The 4th clutch pressure (41)from the 3-4 shift valve becomes 4th clutch pressure (40) at the manual valve. The 4th clutch pressure (40) is appliedto the 4th clutch, and the 4th clutch is engaged.
Fluid flows by way of:- Line pressure (4) + CPB Valve - Line Pressure (5) + l-2 Shift Valve - Line Pressure {5) * 2-3 Shift Valve- Line Pressure (5) + 3-4 Shift Valve - 4th Clutch Pressure (41) + Manual Valve - 4th Clutch Pressure (40)+ 4th Clutch
The hydraulic pressure also flows to the lst clutch. However, no power is transmitted because of the one-wav clutch.
NOTE:
. When used, lelt or tight indicates direction on the hydraulic circuit.. The hydrau lic circuit shows the 97 - 98 models (7 positions); the 99 - 0O models (6 oositions) issimilar.
14-36
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E Position
Fluid flow through the torque converter circuit is the same as in N position. Line pressure (1) changes to line pressure (3)
and flows to the 1-2 shift valve. Line pressure (3) changes to line pressure (3) at the 1-2 shift valve and flows to the servo
vaive. The servo valve is moved to the right side (Reverse range position) and uncovers the port to allow line pressure (3)
to the manual valve. Line pressure (3) from the 1-2 shift valve flows through the servo valve to the manual valve and
changes to 4th clutch pressure (40). The 4th clutch pressure (40) is applied to the 4th clutch, and the 4th clutch is engaged.
R€verse Inhibitor Control
When the @ position is selected while the vehicle is moving forward at speeds over 6 mph (10 km/h), the PCM outputs the
1st speed signal to shift control solenoid valves A and B; shift control solenoid valve A is turned OFF, shift control solenoid
valve B is turned ON. The 1-2 shift valve is moved to the right side and covers the port to stop line pressure (3) to the
servo valve. Line pressure {3) is not applied to the servo valve, and 4th clutch pressure (40} is not applied to the 4th
clutch, as a result, power is not transmitted to the reverse direction.
NOTE:
. When used, lelt ot right indicates direction on the hydraulic circuit.
. The hvdraulic circuit shows the 97 - 98 models (7 positions); the 99 - 00 models (6 positions) is similar
(contd)
14-37
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Description
Hydraulic Flow (contdl
E Position
Fluid flow through the torque converter circuit is the same as in fl position. Line pressure ( 1) changes to line pressure (3)
and flows to the 1-2 shift valve. Line pressure (3) changes to line pressure {3) at the 1-2 shift valve and flows to the servovalve. The servo valve is moved to the right side (Reverse range position) and uncovers the port to allow line pressure (3)
to the manual valve as in E position. Line pressure (3) from the servo valve is intercepted by the manual valve. Hydraulicpressure is not supplied to the clutches, and power is not transmitted.
NOTE:
. When used, left or right indicates direction on the hydraulic circuit.. The hydraulic circuit shows the 97 - 98 models (7 positions); the 99 - 00 models (6 positions) issimilar.
14-38
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Lock-up System TOROUE CONVERTER In E position (97 - 98 models) and in E position (99 - OO models) (3rd and 4th), and E position (97 - 98 mod- els) and in E position with Over-Drive (O/D) is OFF (by pressing the O/D switch) (99 - 00 models) (3rd), pressur- ized fluid is drained from the back of the torque convert- er through a fluid passage, causing the lock-up piston to be held against the torque converter cover, As this takes Dlace, the mainshaft rotates at the same speed as th8 engine crankshaft. Together with the hydraulic control, the PCM optimizes the timing of the lock-up system. Under certain condltions. the lock-up clutch is appli€d during deceleration, in 3rd and 4th gear. The lock-up system controls the range of lock-up sccord- ing to lock-up control solenoid valves A and B, and ths linear solenoid. When lock-up control solenoid valves A and B activate. modulator pressure changes. Lock-up control solenoid valves A and B are mounted on the out- side of the torque converter housing, and the linear solenoid is mounted on the transmission housing. They are controlled bv the PCM. The table below shows the lock-up conditions for lock-up control solenoid valves and linear solenoid pressure. LINEAR SOLENOID PRESSURE (contd) LOCK.UP CONTROL VALVE LOCK.UP CONTROLSOLENOID VALVE AB MODULATORPf,ESSURE MAINSHAFT COUNTERSHAFT SUB.SHAFT Lock-up Conditions Lock-up Conirol Solenoid valveLinaal Solenoid PrgssulsAB Lock-up OFFOFFOFFHigh Lock-up, HalfONDuty operation OFF - ONLow Lock-up, FullONONHigh Lock-up during deceleration ONDuty operation OFF - ON RELIEF VALVE LOCKUP TIMINGVALVE COOLER RELIEF VALVE ATF COOLERATF STRAINER ATF PUMP 14-39 www.emanualpro.com
Description
Lock-up System (contdl
Lock-up Clutch
L Ooeration (clutch on)
With the lock-up clutch on, the fluid in the chamber between the torque convener cover and the lock-uD oiston is drainedoff, and the converter fluid exerts pressure through the piston against the torque converter cover, As a result, the conven-er turbine is locked to the converter cover. This bipasses the converter, placing the vehicle in direct drive.
LOCK,UP PISTON
The power flows by way of:
Engine
+
Drive plate
Torque converter cover
I
Lock-up piston
t
Damper spring
{
Turbine
Mainshaft
IOROUECOVER
Operation (clutch off)
With the lock-up clutch off, the fluid flows in the reverse of clutch on. As a result, the lock-up piston moves away fromthe converter cover, and the torque converter lock-up is released.
Engine
I
Drive plate
{
Torque converter cover
{
Pump
I
Turbine
{
Mainshaft
TOROUECOVER
To ATF cooler{(1\\n1INLET
t
Jtl
ort
MAIf{SHAFT
MAII{SHAFT
14-40
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TOROUE CONVERTER No Lock-up . Lock-up Control Solenoid Valve A: OFF . Lock-up Control Solenoid Valve B: OFF . Linear Solenoid Pressure: High The pressurized fluid regulated by the modulator works on both ends of the lock-up shift valve. Under this condi- tion, the pressures working on both ends of the lock-up shift valve are equal. and the lock-up shift valve is moved to the right side by the tension of the valve spring. Fluid trom the ATF pump will flow through the left side of the lock-up clutch to the torque converter; the lock-up clutch is OFF. NOTE: When us€d, |eft and right indicates direction on the hydraulic circuit. + LINEAR SOLENOID PRESSURE (contd) LOCK.UP CONTROLSOI-ENOID VALVE MOOULATORPRESSURE MAINSHAFT COUNTERSHAFTRELIEF VALVE LOCK-UP TIMINGVALVE i COOLER RELIEF VALVE ATF STRAINERATF COOLER ATF PUMP 14-41 www.emanualpro.com
Description Lock-up System (contdl a a Half Lock-up Lock-up Control Solenoid Valve A: ON Lock-up Control Solenoid Valve B: Duty Operation OFF - ON Linear Solenoid Pressure: Low The PCM switches solenoid valve A on to release modu- lator pressure in the left cavity of the lock-up shift valve. Modulator pressure in the right cavity of the lock-up shift valve overcomes the spring force, and the lock-up shift valve is moved to the left side. Line pressure is then separated into the two passages to the torque converter; torque converter inner pressure enters into right side to engage the lock-up clutch, and torque convener back Dressure enters into left side to disengage the lock-up clutch. Back pressure (F2) is regulated by the lock-up control valve, whereas the position of the lock-up timing valve is determined by linear solenoid pressure and tension of the valve spring. Also the position of the lock-up control valve is determined by the back pressure of the lock-up control valve. torque converter pressure (regulated by the torque converter check valve), and modulator pres- sure (determined by the lock-up control solenoid valve B). The PCM switches lock-up control solenoid valve B on and off rapidly (duty operation), under certajn condi- tions, to regulate back pressur€ (F2) and lock the torque convertef. NOTE: When used, left and right indicates direction on the hvdraulic circuit. + LINEAR SOLENOID PRESSURE TOFOUE CONVERTER L(rcK.UP CONTROLSOLENOID VALVE AB MODULATORPNESSURE MAINSHAFT COUNIERSHAFTRELIEF VALVE L(rcK-UP TIMINGVALVE COOLER RELIEF VALVE ATF STRAINER 14-42 ATF COOLER ATF PUMP www.emanualpro.com
TOROUE CONVEFTER Full Lock-up . Lock-up Control Solenoid Valve A: ON . Lock-up Control Solenoid Valve B: ON . Linear Solenoid Pressure: High When the vehicle speed further increases, linear solenoid pressure increases to high in accordance with the linear solenoid which is controlled by the PCM. The lock up timing valve overcomes the spring force and moves to the left side. Also, this valve closes the fluid port leading to the left side of the lock-up control valve. Under this condition, modulator pressure in the left side of the lock-up control valve had already been released by the lock-up control solenoid valve B; the lock-up con- trol valve is moved to the left side. As this takes place, torque converter back pressure is released fully, causing the lock-up clutch to be engaged fully. NOTE: When used. left and right indicates direction on the hydraulic circuit. + LINEAR SOLENOIO PRESSURE (contd) LOCK-UP CONTROLSOLENOID VALVE MODULATORPRESSURE MAINSHAFT COUNTERSHAFT SUB-SHAFT RELIEF VALVE LOCK.UP TIMINGVALVE COOLER BELIEF VALVE ATF STRAINERATF COOLER ATF PUMP 14-43 www.emanualpro.com
Description Lock-up System (contdl a a Decelelation Lock-up Lock-up Control Solenoid Valve A: ON Lock-up Control Solenoid Valve B; Duty Operation OFF - ON Linear Solenoid Pressure: Low The PCM switches solenoid valve B on and off rapidly under certain conditions. The slight lock-up and half lock-up regions are maintained to lock the torque con- vener propeny. NOTE: When used, left and right indicates direction on the hydraulic circuit. + LINEAR SOLENOID PRESSURE TOROUE CONVERTER tMOOULATORPRESSURE MAINSHAFT COUNTERSHAFT SUB.SHAFT ATF COOLER RELIEF VALVE LOCK.UP TIMINGVALVE COOLER RELIEF VALVE 14-44 ATF STBAINER ATF PUMP www.emanualpro.com