2000 HONDA CIVIC Workshop Manual

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Page 689 of 2189

HONDA CIVIC 2000 6.G Workshop Manual 4th cear lE position)
1. Hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, causing the mainshaft 4th
gear to rotate.
2. Power is transmitted to the countersha

Page 690 of 2189

HONDA CIVIC 2000 6.G Workshop Manual Description
Power Flow (contd)
El Po3ition
1, Hydraulic pressure is switched by the manual valve to the servo valve, which moves the reverse shift fork to thereverse position. The reverse shift fork

Page 691 of 2189

HONDA CIVIC 2000 6.G Workshop Manual Electronic Control SYstem
The electronac controt system consrsts of a Powertrain control Module (PcM), sensors, a Iinear solenoid and four solenoid
valves, shifting and lock-up are electronically cont

Page 692 of 2189

HONDA CIVIC 2000 6.G Workshop Manual Description
Electronic Control System (contd)
Shift Control
The PCM instantaneously determines which gear should be selected by various signals sent from sensors, and actuatesthe shift control soleno

Page 693 of 2189

HONDA CIVIC 2000 6.G Workshop Manual GRADE LOGIC CONTROL SYSTEM
How it works:
The pCM compares actual driving conditions with driving conditions memorized in the PCM, based on the input from the
vehicle speed sensor, the throttle positio

Page 694 of 2189

HONDA CIVIC 2000 6.G Workshop Manual Description
Electronic Control System {contdl
Ascending Control
When the PCM determines that the vehicle is climbing a hill in E position, the system oxtends the sngagement area of2nd gear and 3rd ge

Description
Electronic Control System {cont'dl
Ascending Control
When the PCM determines that the vehicle is climbing a hill in E position, the system oxtends the sngagement area of2nd gear and 3rd gear to prevent ths transmission from fr€quently shifting between 2nd and 3rd gears, and between 3rdand 4th gears, so the vehicle can run smooth and have more power when needed. There are two ascending modes withdifferent 3rd gear driving areas according to the magnitude of a gradient stored in the pCM.
NOTE:
. The PCM memory contains shift schedules between 2nd and 3rd gears, and between 3rd and 4th gears that enable thePCM's fuzzy logic to automatically select the most suitable gear according to the magnitude of a gradient. Fuzzy logic is a form of artificial intelligence that lets computers respond to changing conditions much like a humanmind would,
Dssconding Control
When the PCM determines that the vehicle is going down a hilt in E position, the shift-up speed from 3rd to 4th gearwhen th€ throftle is closed becomes faster than the set speed for flat road driving to widen the 3rd gear driving area.This, in combination with engine braking from the deceleration lock-up, achieves smooth driving when the vehicle isdescending. There are two descending modes with different downshift (4 - 3) schedules according to the magnitude of agradient stored in the PCM. When the vehicle is in 4th gear, and you are decelerating on a gradual hill, or when you areapplying the brakes on a steep hill, the transmission will downshift to 3rd gear. When you accel6rate, the transmission willthen return to 4th gear.
ASCENDING MODEDESCENDING MODE
4TH SHIFTING
L.
F
CHARACTERISIICSCONTROL AREA
ff.1"11", vehicr. 3pe€dff;Tlr., vohicre speed
GRADUAL ASCENOINGCONTROL AREA
Docel6ration Control
When the vehicle goes around a corner. and needs to first decelerate and then accelerate. the rcM sets the data for decelerationcontrol to reduce the number of times the transmission shifts. When the vehicle is decelerating from speeds above 26 mph(41 km/h), the rcM shifts the transmission from 4th to 2nd earlier than normal to cope with upcoming acceleration.
14-16

Page 695 of 2189

HONDA CIVIC 2000 6.G Workshop Manual Circuit Diagram and Terminal Locations -96 - 98 Modols
IGNITIONSWiTCHtc1
IOCI( - UP CONTBOLSOTENOID VALVE A
LOCK-UPCONTSOTsoLtNoto valvE I
SIIIFT CONTFOL
sHrFrc0mioLSOLENOIDVATVE B
UI{EAR SOLENOIO
IG

Page 696 of 2189

$HONDA CIVIC 2000 6.G Workshop Manual Description Electronic Control System (contdl Circuit Diagram and Terminal Locations -99 - O0 Models GNTONSWICH,,--b. rcj LI LOCK.UPCONIFOLSOLEI\Q D VALVE A LOCK UP CONIROLSOLENODVALVEB SH FI CONTR$

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