Isuzu Trooper (1998-2002 year). Manual - part 758

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–17

Once the test vehicle has been identified an “Application
(Powertrain) Menu” screen appears. Please select the
appropriate application.

Data Display
When F1: Data Display is selected, a “Data Display
Menu” screen appears.
Please select either “Transmission Data” or “PC Solenoid
Data”.

060RX009

Function Tests (Reset Oil Life Monitor)
When F4: Function Tests is selected from the “Powertrain
Menu”, a “Reset Oil Life Monitor Menu” screen appears.
When the ATF has been replaced, select “F0” and reset
“Oil Life Monitor” data.

060RX056

7A1–18 TRANSMISSION CONTROL SYSTEM (4L30–E)

F0: Transmission Data

Item

Unit

Engine running at idle

Engine Speed

RPM

750 

∼

 900 RPM

Vehicle Speed

km/h, MPH

0 MPH

Throttle Position

%

0 %

Throttle Position Sensor

V

0.5 

∼

 1.0 V

Manifold Absolute Pressure

kPa

approx. 40 kPa

Barometric Pressure

kPa

approx. 102 kPa

AT Output Speed (Automatic Transmission)

RPM

0 RPM

AT Input Speed Ratio (Automatic Transmission)

0.0

Ignition Voltage

V

12.8 

∼

 14.1 V

AT Oil Temperature (Automatic Transmission)

°

C, 

°

F

70 

∼

 80

°

C (158 

∼

 176

°

F)

AT Oil Life Monitor (Automatic Transmission)

%

100 %

Commanded Gear

1

Current Gear

1

Mode Switch C

Inactive, Active

Inactive

Mode Switch B

Inactive, Active

Inactive

Mode Switch A

Inactive, Active

Active

Mode Switch G

Inactive, Active

Active

Actual Gear

Park

1–2 Shift Solenoid A

Off, On

Off

2–3 Shift Solenoid B

Off, On

On

Brake Switch

Off, On

Off

Solenoid Brake Band

Off, On

Off

TCC Slip Speed

RPM

750 

∼

 900 RPM

TCC Status

Disabled, Enabled

Enabled

TCC Solenoid

Off, On

Off

TCC Duty Cycle

%

0 %

TCC Apply Mode

No Apply, In Apply

No Apply

TCC Release Mode

No, Yes

No

TCC On Mode

No, Yes

No

TCC Off Mode

No, Yes

Yes

Default Gear

No, Yes

No

Engine Warm

No, Yes

Yes

A/C Request

Yes, No

Yes

A/C Clutch Relay

Off, On

On

Winter Switch

Off, On

Off

Winter Drive Lamp

Off, On

Off

Kickdown Switch

Off, On

Off

ATF Lamp (Automatic Transmission)

Off, On

Off

Power Switch

Normal, Power

Normal

Power Drive Lamp

Off, On

Off

ABS Status

On, Off

Off

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–19

F1: PC Solenoid Data

Item

Unit

Engine running at idle

Engine Speed

RPM

750 

∼

 900 RPM

Vehicle Speed

km/h, MPH

0 MPH

Throttle Position

%

0 %

Throttle Position Sensor

V

0.5 

∼

 1.0 V

Manifold Absolute Pressure

kPa

approx. 40 kPa

Barometric Pressure

kPa

approx. 102 kPa

PCS Current (Pressure Control Solenoid)

A

approx. 1.0 A

PCS Actual Current (Pressure Control Solenoid)

A

approx. 1.0 A

PCS Duty Cycle (Pressure Control Solenoid)

%

approx. 45 %

Desired PCS Pressure (Pressure Control Solenoid)

kPa

43 

∼

 52 kPa

Shift Pressure (Line Pressure)

kPa

43 

∼

 52 kPa

Transmission Temperature

°

C, 

°

F

75 

∼

 110

°

C (167 

∼

 230

°

F)

7A1–20 TRANSMISSION CONTROL SYSTEM (4L30–E)

OBD II Diagnostic Management System

Powertrain Control Module (PCM) Location

C07RW005

Class 2 Serial Data Bus
OBD II technology requires a much more sophisticated
PCM than does OBD I technology. The OBD II PCM
diagnostic management system not only monitors
systems and components that can impact emissions, but
they also run active tests on these systems and
components. The decision making functions of OBD II
PCMs have also greatly increased. To accommodate this
expansion in diagnostic complexity, Isuzu engineers have
designed the Class 2 serial data bus, which meets SAE
J1850 recommended practice for serial data.
“Serial Data” refers to information which is transferred in a
linear fashion – over a single line, one bit at a time. A “Data
Bus” is an electronic pathway through which serial data
travels.

TROOPER previously used a 5 volt data bus called
UART, which is an acronym for “Universal Asynchronous
Receive and Transmit”. When neither the vehicle’s
control module nor the diagnostic tool, such as a Tech2,
are “talking,” the voltage level of the bus at rest is 5 volts.
The two computers talk to each other at a rate of 8,192
bits per second, by toggling or switching the voltage on
the data bus from 5 volts to ground.
Class 2 data, which is used on OBD II vehicles, is quite
different. Data is transferred at a rate of 10.4 kilobits per
second, and the voltage is toggled between zero and 7
volts.