Honda CR-V 1997 Service Manual page 534

Description
Electronic Control System (cont'd)
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.
SENSORS
SIGNALS DETECTED
PCM
--1
Vehicle Speed
~
Sensor
-
t- Judgement of Controlling Area
-1
Throttle Position
~
Driving Resistance
r-
Sensor
I I
I
0
c
Detection of
0
-j
~
Calculation
Calculation
~ Barometric
standard
c
Pressure Sensor
of actual
IIcc.leration
of decelera·
0 acceleration
tion
(,) (in Memory)
. .
c
Coolant Temperatur.
~
I I
"
N
Engine Coolant
d
Temperature Sensor
Calculation of gradient
I I
~ or
[Q!)
Position
I
j
-
AIT Gear Position
-
1'97 -981
Selection of Shifting Mode
Switch
[RJ position ('99 - 00)
-
o
Normal Mode (Flat road model
o
Ascending Mode
o
Descending Mode
o
Deceleration Mode
I
l
Automatic 4 Speeds
I
14-18