Isuzu Rodeo UE. Service manual - part 472

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–7

Shift Mode Control

F07RX001

7A1–8

TRANSMISSION CONTROL SYSTEM (4L30–E)

Gear Shift Control

F07RT034

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–9

Winter Drive Mode

1. The winter switch will operate when switched on after

all of the following conditions are present:
a. The gear select position is “D” range only.
b. Vehicle speed is 7 mph (11 km/h) or less.
c. Transmission oil temperature is 120

°

C (248

°

F) or

less.

d. Kickdown switch is off.
e. Accelerator opening is at 8% or less.

2. Cancel Release

1. Cancellation by driver

a. Turning off the winter drive mode switch
b. Shifting select position to “3”, “2”, or “L” (Winter

drive mode is not canceled by selecting “D”, “N”,
“R”, or “P”)

c. Ignition key is turned off.

2. Automatic cancellation

a. When vehicle runs at 21mph (34 km/h) or more

for 1 second or more

b. When transmission oil temperature reaches

140

°

C (284

°

F) or above

NOTE: The  mode returns to normal drive mode
automatically after the winter drive mode is canceled.

Backup Mode

If a major system failure occurs which could affect safety
or damage the transmission under normal vehicle
operation, the diagnostic system detects the fault and
overrides the Powertrain Control Module (PCM).
The “CHECK ENGINE” light comes on and the “CHECK
TRANS” light flashes to alert the driver, and the
transmission must be manually shifted as follows:

Select lever position

Gear Ratio Selected

D

4 (Fourth)

Manual 3

4 (Fourth)

Manual 2

3 (Third)

Manual L

1 (First)

R

Reverse

Shifts are firmer to prevent clutch slip and consequent
wear. The fault should be corrected as soon as possible.

7A1–10 TRANSMISSION CONTROL SYSTEM (4L30–E)

Functions of Input / Output Components

Components

Function

Speed sensor

(fixed to transmission
(T/M))

Senses rotation of output shaft and feeds the data to Powertrain Control Module
(PCM).

Throttle position sensor
(TPS)

(fixed to engine)

Senses the extent of throttle valve opening and the speed of the throttle valve
lever motion to open the valve and feeds the data to PCM.

I

N

Brake Switch (SW)

(fixed to brake pedal)

Senses whether the driver has pressed the brake pedal or not and feeds the
information to PCM.

N
P
U

Kickdown SW

(fixed to accelerator pedal)

Senses whether the driver has pushed the accelerator pedal fully or not and
feeds the information to PCM.

U
T

Mode SW (fixed to T/M)

Senses the select lever position, and feeds the information to PCM.

 

S

I

Power drive SW

(fixed to front console)

Senses whether the driver has selected the power mode, and feeds the
information to PCM.

I

G T/M oil temp. sensor

Senses the T/M oil temperature and feeds the data to PCM.

N
A
L

Engine coolant
temperature sensor

Senses the engine coolant temperature, and feeds the data to PCM.

L

Engine speed signal

Feeds the signals monitoring engine speed to PCM from crank angle sensor.

Air conditioning information

Senses whether the air conditioner has been switched on or not, and feeds the
information to PCM.

Winter switch (fixed to front
console)

Senses whether the driver has selected the winter mode, and feeds the
information to PCM.

Cruise controller
(Overdrive OFF signal)

Downshift takes place when Overdrive OFF signal is received from auto cruise
control unit.

S

Shift solenoid A, B

Selects shift point and gear position suited to the vehicle running condition on
the basis of PCM output.

O
U

S
O
L

Band apply solenoid

Controls oil flow suited to the vehicle running condition on the basis of PCM
output.

T
P
U

E
N
O

Torque Converter
Clutch solenoid

Controls clutch engagement/disengagement suited to the vehicle running
condition on the basis of PCM output.

U
T

 

S

O

I

D

Force motor

(Pressure regulator
valve)

Adjusts the oil pump delivery pressure to line pressure suited to the vehicle
running condition on the basis of PCM output.

I

G

Power drive mode lamp

Informs the driver whether the vehicle is in power mode or not.

G
N

Winter drive mode lamp

Informs the driver whether the vehicle is in winter mode or not.

A
L

T/M monitor lamp

(“CHECK TRANS”)

Informs the driver of failure in the system.

ATF warning lamp

Lights when ATF oil temperature rises. (only 4

×

4)