1998 OPEL FRONTERA automatic transmission

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–7
CONTROL AND FUNCTIONS
Item Description
Shift and lock-up control • In D range, speed change point and Lock-up point can be changed by
setting pattern selection switch to "POWER", "NORMAL" or "WINTER"
mode.
• Gear shift position in the conditions made up of transmission shift positions
(D.2.L) combined with pattern selection switch (POWER, NORMAL, and
WINTER) can be controlled in accordance with vehicle speed and the
opening of throttle valve.
Overdrive cut control • If O/D OFF switch is set on in D range (O/D OFF lamp ON), gear shift to O/
D is not effected.
• Overdrive is released at O/D OFF switch on and high transmission oil
temperature (More than 130
C).
However, to prevent engine over revolution
•4
3 shifting at vehicle speed is less than 118 km/h.
•3
4 shifting at vehicle speed is more than 131 km/h.
Lock-up cut control • In D range, 3rd or O/D lock-up is conducted in "POWER" or "NORMAL"
mode.
• In 2, L range, lock-up is off in the whole area.
• Lock-up timing is controlled to reduce gear shift shock using kind of gear
shift (shift up, etc.) lock-up status at the time of gear shift judgement, gear
step and throttle opening after gear shift.
• Lock-up is released at brake on or high transmission oil temperature (More
than 130
C).
• Lock-up is prohibited when idling is defected by throttle position sensor.
Driving mode select control • The TCM selects a suitable driving mode from the nine kinds for the variety
driving condition.
i) Economy mode ii) Power mode iii) Winter mode iv) HOT1 mode v) HOT2
mode vi) L4 mode vii) Slope mode (Up slope 1, Up slope 2 and Down
slope mode)
• The priority of driving mode:
Economy < Power < Slope < L4 < Winter < HOT1 < HOT2
Squat control • When the TCM detects D signal on, the TCM controls 1–3–1 shift by
setting a timer, in order to improve the shift feel at N
D.
Line pressure control • The TCM output current which corresponds to throttle oil pressure to
pressure control solenoid based on throttle opening.
Indicate oil temperature warning
function• If the transmission oil temperature sensor senses that transmission oil
temperature is greater than 146
C, the TCM turn on A/T OIL TEMP
warning lamp. (The warning lamp is turned off, if oil temperature is less
than 126
C.)
L4 mode control • The TCM judges whether the transfer is engaged in high or low based on
the ratio rpm data from output speed sensor in the transmission and the
rpm data from speed meter sensor to select the shift map.
Up and down hill control • The TCM judges up and down hill, and change shift pattern based on
throttle opening and acceleration.
Correct oil temperature control • If the temperature exceeds a predetermined value, the TCM selects the
high oil temperature shift point for downshifting, thus preventing the oil
temperature from rising. (More than 130
C, D range)

7A–8 AUTOMATIC TRANSMISSION (AW30-40LE)
Winter mode control • The TCM controls the vehicle start smoothly on low frictional road like
snow road by executing this control.
Activate condition:
1. Excluding "2", "L" range
2. Vehicle speed is less than 11 km/h
3. Transmission oil temperature is less than 115
C
4. Throttle opening is less than 8%
5. Excluding winter mode
Cancel condition:
1. When winter mode switch is pushed again
2. When either "2" or "L" is detected
3. Ignition switch "OFF"
4. Vehicle speed is more than 34 km/h for 1 second or mode continuously
5. Transmission oil temperature is more than 130
C
Fail-safe function • When trouble occurs to vehicle sensor and each solenoid, TCM
automatically exer ts fail-safe control not to spoil driveability.
• This control is exer ted when sensor or actuator is in trouble, while TCM
works normally.
Diagnosis function • If there is an abnormality in vehicle sensors, each solenoid (S1-S3, STH),
or throttle position sensor, "CHECK TRANS" lamp is actuated to warn the
drive. But when the abnormality items have been restored to normal, the
light does not blink.
• Faulty parts are memorized in TCM. If self-diagnosis star t signal is
inputted, "CHECK TRANS" lamp is blinked and results of diagnosis are
indicated. A history of faults remains recorded even when IGN switch is off.
TECH 2 • Output of control data in the TCM
• Actuator (Solenoid) operation check
• Erasure of trouble code

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–9
MAJOR INPUT/OUTPUT COMPONENTS
Component Function
Input
Vehicle speed sensor (Speedometer) Detects the vehicle speed (Back-up sensor of output
revolution sensor).
Output revolution sensor (Transmission) Detects the vehicle speed.
Input revolution sensor (Transmission) Detects the input revolution (O/D direct clutch drum
revolution).
Engine revolution sensor Detects the engine revolution.
Throttle position sensor Detects the throttle opening rate.
Neutral start switch Detects the select lever position.
Pattern select switch Detects whether the driver has selected "NORMAL",
"POWER", or "WINTER" mode.
Overdrive off switch Detects whether the driver has selected O/D.
Brake lamp switch Detects whether the driver has pressed the brake pedal or
not.
Oil temperature sensor Detects the oil temperature.
Diagnostic star t switch Star ts self-diagnosis and displays a code for faulty part if
any.
Input/Output
Data link connector When connected with Tech2 or tester, can communicate
the data for function check, etc.
Output
Shift solenoid S1, S2 Selects shift point and gear position suited to the vehicle
running condition on the basis of TCM output.
Lock-up control solenoid SL Control the lock-up clutch suited to the vehicle running
condition on the basis of TCM output.
Pressure control solenoid STH Adjusts throttle pressure by energizing current of linear
pressure control solenoid to prevent the shift shock and to
obtain shift smoothly.
"CHECK TRANS" lamp When trouble has occurred to throttle position sensor,
vehicle speed sensor, or solenoid, "CHECK TRANS" lamp
is blinked to warn the driver. If also displays the trouble
code.
A/T OIL TEMP warning lamp Lights when ATF oil temperature rises. (Turned on at
greater than 146
C . Turned off at less than 126C.
Power mode lamp Informs the driver whether the vehicle is in power mode or
not.
Winter mode lamp Informs the driver whether the vehicle is in winter mode or
not.
Computer
Transmission Control Module (TCM) Based on the signal from each switch and sensors, judges
necessary shift point and lock-up operation, and send
signal to each solenoid.

7A–10 AUTOMATIC TRANSMISSION (AW30-40LE)
LOCATION OF CLUTCH, BRAKE, ONE-WAY CLUTCH AND SOLENOID
C07RY00006
EndOFCallout
Legend
C-0: Overdrive direct clutch
C-1: Forward clutch
C-2: Direct clutch
B-0: Overdrive brake
B-1: Second coast brake
B-2: Second brake
B-3: First and reverse brake
F-0: Overdrive one-way clutch
F-1: One-way clutch (No.1)
F-2: One-way clutch (No.2)
S-1: Shift solenoid S1
S-2: Shift solenoid S2
S-3: Lock-up solenoid SL
S-4: Pressure control solenoid STH

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–11
OPERATION OF CLUTCH, BRAKE AND ONE-WAY CLUTCH
:Operating :Free at coast down :Operating at Lock-up
(1*): Down-shift only in the L range and 2nd
gear - no up-shift.
(2*): Down-shift only in the L range and 3rd gear - no up-shift.
SPEED CHANGE AND LOCK-UP PATTERN
If you select a speed range and a lock-up pattern as shown below by specifying respective positions of transmission
shift lever, transfer shift lever and pattern select switch, the transmission control computer controls speed change and
lock-up operations based on the specified pattern in accordance with the degree of throttle opening and vehicle speed.

: The lock-up operation is available.
( ): Transmission is shifted at high speed to prevent overrun.
Shift lever
positionGear positionC-0C-1C-2B-0B-1B-2B-3F-0F-1F-2S-1S-2S-3
PParking
RReverse
NNeutral
D1st
2nd
3rd
O/D
21st
2nd
3rd
L1st
(1*) 2nd
(2*) 3rd
Pattern select sw.
positionTransmission shift position
D
2L
Overdrive OFF switch
OFF Overdrive OFF switch
ON
NORMAL
POWER1st
2nd 1st 2nd 1st2nd(3rd) 1st(2nd)(3rd)
WINTER 3rd fixed──

7A–12 AUTOMATIC TRANSMISSION (AW30-40LE)
OVERDRIVE AND LOCK-UP OPERATING CONDITIONS
The overdrive and lock-up clutch operate if the following conditions are satisfied.

(1*):
If transmission oil temperature is more than 130C, lock-up is inhibit.
OverdriveLock-up clutch
Transmission shift positionD range (1*)
O/D OFF switchOFF (O/D OFF lamp OFF)—
Stop lamp switch—OFF
Throttle opening—Except fully closed
Vehicle speedAbout 49 km/h or more3rd: About 50 km/h or more
O/D: About 65 km/h or more

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–13
DIAGNOSIS
BASIC TROUBLESHOOTING
AW30-40LE transmission, called Electronic Controlled Transmission (ECT), differs from oil pressure control type
transmissions in that it is controlled by a microcomputer. Accordingly, its troubleshooting procedure differs also.
Before troubleshooting an ECT, first determine whether the problem is electrical or mechanical. To do this, just refer to
the basic troubleshooting flowchart provided below. If the cause is already known, using the basic troubleshooting
chart below along with the general troubleshooting char t on the following page should speed the procedure.

7A–14 AUTOMATIC TRANSMISSION (AW30-40LE)
821RY00012
F07LV002
740RY00013
740RY00014
SELF-DIAGNOSIS
Warning to the driver
• When trouble has occurred to throttle position sensor, output
revolution sensor, input revolution sensor, neutral star t
switch, engine revolution signal, speed meter signal, or
solenoids, "CHECK TRANS" lamp is blinked (1.25 Hz) even
during driving to warn the driver.
• The trouble is recorded by trouble code in TCM.
• When temporary trouble has been shooted, the "CHECK
TRANS" lamp stops blinking. This blinking can be stopped
by setting the ignition key off. But the trouble code remains
memorized in TCM.
Self-diagnosis code (Flashing code) display
• For quick search for faulty parts, 12 different items of trouble
code are indicated by "CHECK TRANS" lamp blinking.
• The storaged trouble codes can be identified by shor ting the
terminals No. 11 and No. 4 or 5 (ground) of data link
connector with a lead wire.