And HONDA CR-V 1999 RD1-RD3 / 1.G Workshop Manual
[x] Cancel search | Manufacturer: HONDA, Model Year: 1999, Model line: CR-V, Model: HONDA CR-V 1999 RD1-RD3 / 1.GPages: 1395, PDF Size: 35.62 MB
Page 544 of 1395
Description
Hydraulic Control (cont'd)
Servo Body
The servo body is located on the secondary valve body. The servo body contains the servo valve (which is integrated withthe reverse shift fork), and the accumulators.
2ND ACCUMULATOR
3RD SUBACCUMULATOR
SERVO BODY
1ST ACCUMULATOR
SERVO VALVE/SHIFTFORK SHAFT
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Page 546 of 1395
Description
Hydraulic Flow (cont'dl
lll Position
As the engine turns, the ATF pump starts to operate. Automatic transmission fluid (ATF) is drawn from (99) and dis-charged into (1). Then, ATF flowing from the ATF pump becomes line pressure ('l). Line pressure (1) js regulated by theregulator valve. Torque converter inlet pressure {92) enters (94) of the torque conveTter through the lock-up shift valve anddischarges into (90) The torque converter check valve prevents torque converter pressure from rising. Under this condi-tion, hydraulic pressure is not applied to the clutches.
NOTE;
. When used. "|eft" o. "right" indicates direction on the hvdraulic circutt.. The hydraulic circuit shows the '97 - 98 models {7 positions}; the '99 - 00 models (6 positions) is similar.
'lF'.j.l
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Page 547 of 1395
B Position
Line pressure {1) flows to the manual valve and the modulator valve, Line pressure (1) changes to line pressure (4) and
1st-hold clutch pressure at the manual valve, and changes to modulator pressure at the modulator valve Modulator pres-
sure {6) flows to the left ends of the 1-2 shift valve and 3-4 shift valve because shift control solenoid valve A is turned oFF
by the PcM. The 1-2 shift valve and the 3-4 shift valve are moved to the right side. Line pressure (4) becomes 1st clutch
pressure (10) at the 1-2 shift valve. 1st clutch pressure (10) is applied to the 1st clutch, and the 1st clutch is engaged lst-
hold clutch pressure (18) flows to the lst-hol; clutch via the 3-4 shift valve and the 1-2 shift valve Power is transmitted
only during deceleration through the 1st-hold clutch.
NOTE:
. When used, "left" or "right" indicates direction on the hydraulic circuit'
. The hvdraulic circuit shows the'97 - 98 models (7 positions); the '99 - O0 models (6 positions) is similar'
(cont'd)
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Page 548 of 1395
Description
Hydraulic Flow (cont'dl
l?J Position
Line pressure {1) flows to the manual valve and the modulator valve. Line pressure (1} changes to line pressure (4) at themanual valve, and changes to modulator pressure at the modulator valve. But modulator pressure {6} does not flow toeach shift valve because shift control solenoid valves A and B are turned ON by the PCM. Line pressure (4) passes throughthe CPB valve and the CPC valve, and changes to line pressure (5), then flows to the 'l-2 shift valve. Line pressure (5) fromthe 1-2 shift valve changes to 2nd clutch pressure (20) at the 2-3 shift valve. The 2nd clutch pressure (20) is applied to the2nd clutch, and the 2nd clutch is engaged, Line pressure (4) passes through the 1-2 shift valve and the orifice, and changesto lst clutch pressure. The 1st clutch pressure {10) also flows to the 1st clutch. However, no power is transmitted becauseof the one-way clutch.
NOTE:
. When used, "left" or "right" indicates direction on the hvdraulic circuit.. The hydraulic circuit shows the '97 - 98 models (7 positions); the '99 - OO models (6 positions) issimilar.
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Page 549 of 1395
![HONDA CR-V 1999 RD1-RD3 / 1.G Workshop Manual
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](/img/13/5778/w960_5778-548.png "HONDA CR-V 1999 RD1-RD3 / 1.G Workshop Manual
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")
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 the PcM. The 1-2 shift valve is moved to
the right side. Line pressure {4) changes to 'lst clutch pressure (10} at the 1-2 shift valve and the orifice The 1st clutch
pressure (10) is applied to the 1st clutch and the 1st accumulator; the vehicle will move as the engine power is trans-
mitted.
NOTE:
. When used, "left" or "right" indicates direction on the hydraulic circuit.
. The hvd rau lic circuit shows th e '97 - 98 models (7 positions); the '99 - 00 models {6 positions) issimilar.
(cont'dl
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Page 550 of 1395
Description
Hydraulic Flow (cont'dl
2nd Gsar
As the speed of the vehicle reaches the prescribed value. shift control solenoid valve A is turned ON by the pCM.Modulator pressure (6A) in the left end of the 1-2 shift valve is released by turning shift control solenoid valve A ON.The 1-2 shift valve is moved to the left side and uncovers the port to allow line pressure (5) to the 2-3 shift vatve. Linepressure (5) changes to 2nd clutch pressure (20) at the 2-3 shift valve, The 2nd clutch pressure {20) is appli€d to the2nd clutch. and the 2nd clutch is engaged.
Fluid flows by way of:- Line Pressure (4) + CPB Valve - Line Pressure (5) * 1-2 Shift Valve - Line pressure (S) * 2-3 Shift Valve- 2nd Clutch Pressure (20) - 2nd Clutch
The hydraulic pressure also flows to the lst clutch. However, no power is transmitted because of the one-wav ctutch.
NOTE:
. When used, "|eft" or "right" indicates direction on the hydraulic circurr_' The hydraulic circuit shows the'97 - 98 models (7 positions); the '99 - 00 models (6 positions) is similar,
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Page 551 of 1395
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); the'99 - 00 models (6 positions) is similar.
(cont'd)
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Page 552 of 1395
Description
Hydraulic Flow (cont'd)
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.
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Page 553 of 1395
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'
(cont'd)
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Page 554 of 1395
Description
Hydraulic Flow (cont'dl
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.
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