Opel Frontera UBS. Manual - part 2593

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–23

NOTE: To use the DTC again to identify a problem, you
will need to reproduce the fault or the problem. This may
require a new test drive or just turning the ignition on (this
depends on the nature of the fault).

1. IF you have a Tech2:

1. Connect the Tech2 if it is still not connected

GOTHROUGH Tech2 OBD II CONNECTION.

2. Push “F1= Clear DTC Info” in the Application

Menu and answer “Yes” to the question “Do you
want to clear DTC’s?”

a. When a malfunction remains as it is the Tech2

displays “4L30E CODES NOT CLEARED”. This
means that the problem is still there or that the
recovery was not done. Please GOTO DTC
CHECK.

b. When a malfunction has been repaired and the

recovery is done. The Tech2 displays “4L30E
CODES CLEARED”.

2. IF you have no Tech2:

To clear the DTC, remove Fuse “Stop, A/T CONT”
(C–14, 15A) for at least 10 seconds.

DTC Check

1. Diagnostic Trouble Codes (DTC) have been identified

by Tech2.

2. You have written the list of the DTCs. The order of the

malfunctions has no meanings for this PCM. Usually
only one or two malfunctions should be set for a given
problem.

3. Check directly the DTCs you identified. The DTCs are

sorted by number. Refer to Diagnostic Trouble Code
(DTC) Identification in this section.

PCM Precaution

The PCM can be damaged by:

1. Electrostatic discharge
2. The short circuit of some terminals to voltage or to

ground.

Electrostatic Discharge Damage Description:

1. Electronic components used to control systems are

often designed to carry very low voltage, and are very
susceptible to damage caused by electrostatic
discharge. It is possible for less than 100 volts of
static electricity to cause damage to some electronic
components. By comparison, it takes as much as
4,000 volts for a person to even feel the zap of a static
discharge.

2. There are several ways for a person to become

statically charged. The most common methods of
charging are by friction and induction. An example of
charging by friction is a person sliding across a car
seat, in which a charge of as much as 25,000 volts
can build up. Charging by induction occurs when a
person with well insulated shoes stands near a highly
charged object and momentarily touches ground.
Charges for the same polarity are drained off, leaving
the person highly charged with the opposite polarity.
Static charges of either type can cause damage,
therefore, it is important to use care when handling
and testing electronic components.

NOTICE:

  To prevent possible electrostatic

discharge damage:

1. Do not touch the PCM connector pins or soldered

components on the PCM circuit board.

2. Be sure to follow the guidelines listed below if

servicing any of these electronic components:

3. Do not open the replacement part package until it is

time to install the part.

4. Avoid touching electrical terminals of the part.
5. Before removing the part from its package, ground

the package to a known good ground on the vehicle.

6. Always touch a known good ground before handling

the part. This step should be repeated before
installing the part if the part has been handled while
sliding across the seat, while sitting down from a
standing position or while walking some distance.

Information On PCM

1. The Powertrain Control Module (PCM) is located in

the center console and is the control center of the
electronic transmission control system.

2. The PCM must be maintained at a temperature below

85

°

C (185

°

F) at all times. This is most essential if the

vehicle is put through a paint baking process. The
PCM will become inoperative if its temperature
exceeds 85

°

C (185

°

F). Therefore, it is

recommended that the PCM be removed or that
temporary insulation be placed around the PCM
during the time the vehicle is in a paint oven or other
high temperature process.

3. The PCM is designed to process the various inputs

and then respond by sending the appropriate
electrical signals to control transmission upshift,
downshift, shift feel and torque converter clutch
engagement.

4. The PCM constantly interprets information from the

various sensors, and controls the systems that affect
transmission and vehicle performance. By analyzing
operational problems, the PCM is able to perform a
diagnostic function by displaying DTC(s) and aid the
technician in making repairs.

Intermittent Conditions

If the Tech2 displays a diagnostic trouble code as
intermittent, or if after a test drive a DTC does not
reappear though the detection conditions for this DTC are
present, the problem is most likely a faulty electrical
connection or loose wiring. Terminals and grounds should

7A1–24 TRANSMISSION CONTROL SYSTEM (4L30–E)

always be the prime suspect. Intermittents rarely occur
inside sophisticated electronic components such as the
PCM.
Use the DTC information to understand which wires and
sensors are involved.
When an intermittent problem is encountered, check
suspect circuits for:

1. Poor terminal to wire connection.
2. Terminals not fully seated in the connector body

(backed out).

3. Improperly formed or damaged terminals.
4. Loose, dirty, or corroded ground connections:

HINT: Any time you have an intermittent in more than
one circuit, check whether the circuits share a
common ground connection.

5. Pinched or damaged wires.
6. Electro–Magnetic Interference (EMI):

HINT: Check that all wires are properly routed away
from spark plug wires, distributor wires, coil, and
generator. Also check for improperly installed
electrical options, such as lights, 2–way radios, etc.

Use the F3 SNAPSHOT mode of the Tech2 to help isolate
the cause of an intermittent fault. The snapshot mode will
record information before and after the problem occurs.
Set the snapshot to “trigger” on the suspect DTC.  If you
notice the reported symptom during the test drive, trigger
the snapshot manually.
After the snapshot has been triggered, command the
Tech2 to play back the flow of data recorded from each of
the various sensors. Signs of an intermittent fault in a
sensor circuit are sudden unexplainable jump in data
values out of the normal range.

Transmission And PCM Identification

The chart below contains a list of all important information
concerning rear axle ratio, Powertrain Control Module
(PCM), and transmission identification.

VEHICLE

Rr axle

PCM

TRANSMISSION

Type

Engine

Rr axle

Ratio

ISUZU Parts No.

Calibration

Code

Isuzu Part No.

Model Code

Isuzu /

3.2L V6

4.555

8–16254–949–0
8–16254–749–0
8–16253–989–0

G20

8–96018–272–3

FP (4X4)

Trooper

3.5L V6

4.300

8–16254–019–1
8–16254–959–1
8–09376–619–1

G21

8–96018–270–4

FK (4X4)

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–25

Isuzu Trooper

240RY00031

7A1–26 TRANSMISSION CONTROL SYSTEM (4L30–E)

Diagnostic Trouble Code (DTC)
Identification

DTC 

NUMBER

DTC NAME

DTC TYPE

“CHECK

TRANS”

P0218

Transmission Fluid Over Temperature

D

P0560

System Voltage Malfunction

C

Flash

P0705

Transmission Range Switch (Mode Switch) Illegal Position

D

P0706

Transmission Range Switch (Mode Switch) Performance

D

P0712

Transmission Fluid Temperature Sensor Circuit Low Input
(TFT)

D

P0713

Transmission Fluid Temperature (TFT) Sensor Circuit High
Input

D

P0719

TCC Brake Switch Circuit High (Stuck ON)

D

P0722

Transmission Output Speed Sensor (OSS) Low Input

C

Flash

P0723

Transmission Output Speed Sensor (OSS) Intermittent

C

Flash

P0730

Transmission Incorrect Gear Ratio

C

Flash

P0748

Pressure Control Solenoid (PCS) (Force Motor) Circuit
Electrical

C

Flash

P0753

Shift Solenoid A Electrical

C

Flash

P0758

Shift Solenoid B Electrical

C

Flash

P1790

ROM Transmission Side Bad Check Sum

C

Flash

P1792

EEPROM Transmission Side Bad Check Sum

C

Flash

P1835

Kickdown Switch Always ON

D

P1850

Brake Band Apply Solenoid Malfunction

D

P1860

TCC Solenoid Electrical

D

DTC TYPE

DEFINITION

C

Flashing Check Trans on 1st failure

D

No lamps

NOTE: On the following charts, refer to the Powertrain
Control Module (PCM) section for the Wiring System, and
the Body and Accessories section for circuit diagram
details, parts location, and connector configuration.