Opel Frontera UBS. Service manual — part 1495
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. 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 tempera-
ture 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 informa-
tion to PCM.
Cruise controller * (Over-
drive 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
S
O
L
Band apply solenoid
Controls oil flow suited to the vehicle running condition on the basis of PCM
output.
O
U
T
P
E
N
O
Torque Converter
Clutch solenoid
Controls clutch engagement/disengagement suited to the vehicle running
condition on the basis of PCM output.
P
U
T
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.
S
I
Power drive mode lamp
Informs the driver whether the vehicle is in power mode or not.
I
G
Winter drive mode lamp
Informs the driver whether the vehicle is in winter mode or not.
G
N
A
L
T/M monitor lamp
(“CHECK TRANS”)
Informs the driver of failure in the system.
L
ATF warning lamp
Lights when ATF oil temperature rises.
ABS signal *
When the select lever is at “Reverse” or “L” range, sends a signal to the ABS
controller as one of the ABS control conditions.
* If equipped
TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–11
Diagnosis
Electronic Diagnosis
How To Diagnose The Problem
1. To avoid incorrect diagnostics, this book needs to be
followed accurately. Unless stated, do not jump
directly to a section that could contain the solution.
Some important information may be missed.
2. The sections in CAPITALS and bold are the main
sections that can be found in the contents.
3. The GOTO “SECTION” means to continue to check
going to the “section”.
4. The GOTHROUGH “SECTION” means to go
through the “section” and then to go back to the place
the GOTHROUGH was written.
5. BASIC ELECTRIC CIRCUITS:
You should understand the basic theory of electricity.
This includes the meaning of voltage, amps, ohms,
and what happens in a circuit with an open or shorted
wire. You should also be able to read and understand
wiring diagrams.
Check Trans Indicator
Find CHECK TRANS indicator and verify if it is
A. Flashing: GOTO DIAGNOSTIC CHECK.
B. Staying on: GOTHROUGH CHECK TRANS
CHECK.
C. Is never ON when the ignition key is turned on:
GOTHROUGH CHECK TRANS CHECK
D. Is ON during 2 seconds at ignition but OFF after:
Normal operation. No DTC or malfunction.
821RW261
Diagnostic Check
This test determines if the transmission or its inputs,
outputs, connections, or sensors are failing.
1. Connect the Tech2: GOTHROUGH Tech2 OBD II
CONNECTION.
2. Turn on the ignition but not the engine.
3. Push “F2” on Tech2 to see the Diagnostic Trouble
Code (DTC):
4. Do you have a DTC?
YES: write down all code numbers and do the DTC
CHECK
NO: the DTC can not help you finding the problem.
1. GOTHROUGH “CHECK TRANS” CHECK
2. IF it is flashing and the flash is 0.2 seconds ON
and 0.2 seconds OFF, this means that you should
have a DTC stored. Please recheck GOTO
DIAGNOSTIC CHECK and if you find the same
problem, replace the Powertrain Control Module
(PCM).
Normal
C07RW047
Abnormal
C07RW048
7A1–12 TRANSMISSION CONTROL SYSTEM (4L30–E)
“Check Trans” Check
1. Indicator it is ON during 2 seconds at ignition (or when
the engine is cranked) but it is OFF after the engine
starts. The indicator is working normally GOTO
DIAGNOSTIC CHECK.
821RW261
Normal
C07RW047
2. Indicator it is flashing and the flash is 0.2 seconds ON
and 0.2 seconds OFF always when ignition is on
(engine cranked or not). This means that there is a
malfunction. GOTO DIAGNOSTIC CHECK.
Abnormal
C07RW048
3. Indicator it is staying ON always when Ignition is ON.
1. This means that connection between the lamp
and the PCM is shorted to ground.
2. Verify if instrument panel terminal 3 of connector
I–9 is shorted to ground.
3. Verify if the PCM connector J1 (RED) terminal
A14 is shorted to ground.
4. Verify that the instrument panel terminal 15 of
connector I–9 is connected to battery.
5. IF problem solved: GOTO CHECK TRANS
INDICATOR.
NO:Replace Powertrain Control Module (PCM).
4. Indicator it is staying OFF with the ignition ON (engine
OFF).
1. This means that connection between the lamp
and the PCM is shorted to battery or opened.
2. Verify if instrument panel terminal 3 of connector
I–9 is shorted to battery or open.
3. Verify if the PCM connector J1 (RED) terminal
A14 is shorted to battery or open.
4. Verify that the instrument panel terminal 15 of
connector I–9 is connected to battery. If not,
check the fuses and the connections voltage.
5. IF problem solved: GOTO CHECK TRANS
INDICATOR.
NO: Replace Powertrain Control Module (PCM).
TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–13
D07RW028
Tech2 OBD II Connection
In order to access OBD II Powertrain Control Module
(PCM) data, use of the Tech2 scan tool kit (7000086) is
required.
1. The electronic diagnosis equipment is composed of:
1. Tech2 (7000057) hand–held scan tool unit and
DLC cable (3000095).
901RW176
2. SAE 16/19 adapter (3000098) (1), RS 232 loop
back connector (3000112) (2), and PCMCIA card
(3000117) (3).
F07RW033
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