Opel Frontera UE. Manual - part 1600

7A1–22 TRANSMISSION CONTROL SYSTEM (4L30–E)

810RT022

PIN 1 –

(Not used)

PIN 2 –

J1850 Bus + L line on 2–wire systems, or
single wire (Class 2)

PIN 3 –

(Not used)

PIN 4 –

Chassis ground pin

PIN 5 –

Signal ground pin

PIN 6 –

PCM diagnostic enable

PIN 7 –

(Not used)

PIN 8 –

(Not used)

PIN 9 –

Primary UART

PIN 10 –

(Not used)

PIN 11 –

(Not used)

PIN 12 –

ABS diagnostic or CCM diagnostic enable

PIN 13 –

SIR diagnostic enable

PIN 14 –

(Not used)

PIN 15 –

(Not used)

PIN 16 –

Battery power from vehicle unswitched (4
AMP MAX.)

Malfunction Indicator Lamp (MIL)

The Malfunction Indicator Lamp (MIL) looks the same as
the MIL you are already familiar with (“CHECK ENGINE”
lamp). However, OBD II requires that it illuminate under a
strict set of guidelines. Basically, the MIL is turned on
when the PCM detects a DTC that will impact the vehicle’s
emissions.
The MIL is under the control of the Diagnostic Executive.
The MIL will be turned on if a component or system which
has an impact on vehicle emissions indicates a
malfunction or fails to pass an emissions–related
diagnostic test. It will stay on until the system or
component passes the same test, for three consecutive
trips, with no emissions–related faults.

DTC Types

Each DTC is directly related to a diagnostic test.  The
Diagnostic Management System sets DTC based on the
failure of the tests during a trip or trips.  Certain tests must
fail two (2) consecutive trips before the DTC is set.  The

following are the four (4) types of DTCs and the
characteristics of those codes:

D

Type A
– Emissions related
– Requests illumination of the MIL of the first trip with

a fail

– Stores a History DTC on the first trip with a fail
– Stores a Freeze Frame (if empty) (DTC

Information for 6VD1 engine)

– Stores a Fail Record
– Updates the Fail Record each time the diagnostic

test fails

D

Type B
– Emissions related
– “Armed” after one (1) trip with a fail
– “Disarmed” after one (1) trip with a pass
– Requests illumination of the MIL on the 

second

consecutive trip with a fail

– Stores a History DTC on the second consecutive

trip with a fail (The DTC will be armed after the first
fail)

– Stores a Freeze Frame on the second consecutive

trip with a fail (if empty) (DTC Information for 6VD1
engine)

– Stores a Fail Record when the first test fails (not

dependent on 

consecutive trip fails)

– Updates the Fail Record each time the diagnostic

test fails

(Some special conditions apply to misfire and fuel trim
DTCs)

D

Type C (if the vehicle is so equipped)
– Non-Emissions related
– Requests illumination of the Service Lamp or the

service message on the Drive Information Center
(DIC) on the 

first trip with a fail

– Stores a History DTC on the 

first trip with a fail 

–

Does not store a Freeze Frame

– Stores Fail Record when test fails
– Updates the Fail Record each time the diagnostic

test fails

D

Type D
– Non-Emissions related
– Not request illumination of any lamp
– Stores a History DTC on the 

first trip with a fail

–

Does not store a Freeze Frame

– Stores Fail Record when test fails
– Updates the Fail Record each time the diagnostic

test fails

IMPORTANT:

Only four Fail Records can be stored.

Each Fail Record is for a different DTC. It is possible that
there will not be Fail Records for every DTC if multiple
DTCs are set.

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–23

Clear DTC

NOTE: If you clear the DTC (Diagnostic Trouble Codes)
you will not be able to read any codes recorded during the
last occurrence.

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 Tech 2:

1. Connect the Tech 2 if it is still not connected go

through Tech 2 OBD II CONNECTION.

2. Push “F1: Clear DTC Information” in the

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

a. When a malfunction still exists and the Tech 2

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

b. When a malfunction has been repaired and the

recovery is done the Tech 2 displays “4L30E
CODES CLEARED”.

2. IF you have no Tech 2, disconnect the PCM battery

feed as necessary.

DTC Check

1. Diagnostic Trouble Codes (DTC) have been identified

by Tech 2.

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. The 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.

SECTION

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

Intermittent Conditions

If the Tech 2 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
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. Electromagnetic 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 F2: SNAPSHOT mode of the Tech 2 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
or, if you notice the reported symptom during the test
drive, trigger the snapshot manually.
After the snapshot has been triggered, command the
Tech 2 to play back the flow of data recorded from each of
the various sensors. Sign of an intermittent fault in a
sensor circuit is a sudden unexplainable jump in data
values out of the normal range.

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–25

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

Ratio

PCM

TRANSMISSION

Type

Engine

Ratio

ISUZU Parts No.

Calibration

Code

Isuzu Part No.

Model Code

Isuzu/

Fron-

tera

3.2L V6

4.100

8–12207–159–0

I36

8–96018–555–0

FT (4

×

4)

240R100011

SECTION