sensor OPEL FRONTERA 1998 Workshop Manual

7A–32 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0710 (FLASHING CODE 16) OIL TEMPERATURE SENSOR FAILURE (OT2)
D07RY00021Circuit description:
The oil temperature sensor is a thermistor sensor that is
installed in the transmission case and converts
temperature changes into continuous electric signals,
then outputs them to the Transmission Control Module
(TCM). When the ATF temperature is low, the resistance
of the sensor (thermistor) goes up, so that the voltage of
the TCM signal becomes high.
As the ATF is gradually warmed, the resistance of the
sensor goes down and the voltage becomes low. At the
normal operating ATF temperature (80
C/176F) of the
transmission, the voltage of the TCM is about 3.7V.
Fail-safe condition:
The TCM controls fail-safe by detecting oil temperature
sensor failure.
Failure detection:
Short detection
• When the A/D value is detected less than 10
(220
C) for 5 minutes continuously while normal
judgment is not satisfied from ignition on.
Open detection
• After 15 minites passed when the engine revolution
is more than 400 rpm and the selector position
switch is selected on R, D, 2, L range.
• When the change of the A/D value from engine
star t is less than 15 and the minnum A/D value is
more than 1000 (-10
C) from engine star t.
Contents of control:
At failure detection
• Changes shift map to HOT2 map
• Controls as A/T oil temperature 200
C
• Lock-up control inhibit
• Up hill and down hill control inhibit
• Blinks "CHECK TRANS" lamp
• Stores the failure information in failure-memoryAt failure decision
Same as failure detection.
Conditions of turning "CHECK TRANS" off:
Turns "CHECK TRANS" lamp off when judged 0km/h by
output revolution sensor after the normal area of oil
temperature 40
C – 150C is detected for 10 sec
continuously.
Reversion conditions from fail-safe:
Recovers at the same time as the conditions of turning
“CHECK TRANS” lamp off are satisfied.
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) Check that the voltage of the oil temperature sensor
varies with ATF temperatures.
(2) Check that the resistance of the oil temperature
sensor varies with ATF temperatures.
Diagnostic aids:
An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–33
DTC P0710 (FLASHING CODE 16) OIL TEMPERATURE SENSOR FAILURE (OT2)
DTCP0710

7A–34 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0717 (FLASHING CODE 14) INPUT REVOLUTION SENSOR FAILURE (NC0)
D07RY00020
Circuit description:
Input revolution information is provided to TCM by the
input revolution sensor. This sensor is located in the
transmission case.
The input revolution sensor is an electromagnetic pulse
pickup type that generates a speed signal according to
the revolution of the transmission OD direct clutch drum.
As a result, the sensor sends a sine wave signal (AC) to
the TCM, which conver ts this sine wave signal (pulse
voltage) to a RPM signal.
Fail-safe control:
The TCM controls fail-safe by detecting input revolution
sensor failure.
Failure detection:
• When not even 1 pulse is input in the input revolution
sensor during the time 4 pulses are input in the
output revolution sensor.
• When the failure criteria is continuously 1000 times
from the time ignition is turned ON until it is turned
OFF.
Prohibits failure detection when at least one among the
following conditions is satisfied.
• When D, 2 and L range signal is not fixed.
• When output revolution is less than 775 rpm.
• When the failure detection timer T1 (*1) is less than
25 seconds.
• Solenoid S1, S2, and selector position switch is on
failure detection or decision.
• At 4th gear.
• When passed less than 10 seconds after shift
command output.
*1: Failure detection inhibit timer T1
Timer star ts when D, 2 or L range are detected (fixation
signal).
Contents of control:
At failure detection• Lock-up control inhibit
• Up hill and down hill control inhibit
At failure decision
Executes following items in addition to above control
items at failure detection.
• Blinks "CHECK TRANS" lamp
• Stores the failure information in failure-memory
Conditions of turning "CHECK TRANS" off:
At D, 2 or L range and not shifting, turns "CHECK
TRANS" lamp off when judged 0km/h by output
revolution sensor after more than 1 pulse input in the
input revolution sensor and finished vehicle speed
calculation during the time 4 pulse are input in the output
revolution sensor.
Reversion conditions from fail-safe:
Recovers at the same time as the conditions of turning
“CHECK TRANS” lamp off are satisfied.
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) When the engine is running, a revolution signal is
input from the input revolution sensor to the TCM.
(2) At this test, the continuity of circuit wiring and the
input revolution sensor is checked.
(3) At this test, the continuity of the input revolution
sensor is checked.
Diagnostic aids:
An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–35
DTC P0717 (FLASHING CODE 14) INPUT REVOLUTION SENSOR FAILURE (NC0)
DTCP0717

7A–36 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0722 (FLASHING CODE 11) OUTPUT REVOLUTION SENSOR FAILURE (SP2)
D07RY00018Circuit description:
Vehicle speed information is provided to the TCM by the
output revolution sensor. This sensor is located in the
transmission adapter housing. The output revolution
sensor is an electromagnetic pulse pickup type that
generates a speed signal according to the revolution of
the transmission output shaft. As a result, the sensor
sends a sine wave signal (AC) to the TCM, which
converts this sine wave signal (pulse voltage) to a km/h
signal.
Fail-safe control:
The TCM controls fail-safe by detecting output revolution
sensor failure.
Failure detection:
• When not even 1 pulse is input in the output
revolution sensor during the time 4 pulses are input
in the speed meter sensor.
• When the failure criteria is continuously 500 times
from the time ignition is turned ON until it is turned
OFF.
• Detection inhibit condition:
When speed meter sensor revolution is less than 80
rpm.
Contents of control:
At failure detection
• Uses the vehicle speed calculated by speed meter
sensor for shift control
• Keeps the condition of transfer (High/Low judgment)
just before detection until vehicle speed is 0km/h,
and changes shift map to L4 map (3
4UP None) at
vehicle speed 0km/h.
• Use high oil temperature map according to shift map
priority at correct oil temperature control.
• Squat control inhibit
• Up hill and down hill control inhibit
• Reverse lockout control inhibit• Stores the failure information in failure-memory
At failure decision
Executes following items in addition to above control
items at failure detection.
•Blinks "CHECK TRANS" lamp
Conditions of turning "CHECK TRANS" off:
Turns "CHECK TRANS" lamp off when judged 0km/h by
speed meter sensor after more than 1 pulse input in the
output revolution sensor and finished vehicle speed
calculation during the time 4 pulse are input in the speed
meter sensor.
Reversion conditions from fail-safe:
Recovers at the same time as the conditions of turning
“CHECK TRANS” lamp off are satisfied.
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) When the vehicle is running, a speed signal is input
from the output revolution sensor to the TCM.
(2) At this test, the continuity of circuit wiring and the
output revolution sensor is checked.
(3) At this test, the continuity of the output revolution
sensor is checked.
Diagnostic aids:
An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–37
DTC P0722 (FLASHING CODE 11) OUTPUT REVOLUTION SENSOR FAILURE (SP2)
DTCP0722

7A–38 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0727 (FLASHING CODE 13) ENGINE REVOLUTION SIGNAL FAILURE (NE)
D07RY00019Circuit description:
Engine revolution (rpm) signals are sent from Engine
Control Module (ECM) to the Transmission Control
Module (TCM).
The engine speed sensor is an electromagnetic pulse
pickup type that generates signals when the flywheel
gear revolves (2 pulses at a single revolution of the
flywheel gear).
The TCM converts these sine wave signals into engine
revolution (RPM) signals.
Fail-safe control:
The TCM controls fail-safe by detecting engine revolution
sensor failure.
Failure detection:
• When input revolution is more than 2000 rpm
• When not even 1 pulse is input in the engine
revolution signal during 5 seconds
• Detection inhibit condition: At 4th gear
Contents of control:
At failure detection
• Up hill and down hill control inhibit
• Oil temperature sensor failure detection inhibit
• Blinks "CHECK TRANS" lamp
• Stores the failure information in failure memory.
At failure decision
Same as failure detection
Conditions of turning "CHECK TRANS" lamp off:
Turns "CHECK TRANS" lamp off when judged 0km/h by
speed meter sensor after the engine revolution signal
pulses are input 250 pulses normally.
(however, uses 0 km/h judgment by back-up vehicle
speed at output revolution failure)
Reversion conditions from fail-safe:
Recovers at the same time as the conditions of turning
“CHECK TRANS” lamp off are satisfied.Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) Engine revolution signals are input from the ECM into
the TCM.
(2) When the engine idling, voltage fluctuates with (AC
intermittent) range of less than 1.4V
9 16V.
Diagnostic aids:
An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.

7A–40 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0743 (FLASHING CODE 33) TORQUE CONVERTER CLUTCH CONTROL LOCK-UP (ON/
OFF) SOLENOID FA I L U R E ( S L )
D07RY00047Circuit description:
The lock-up solenoid SL of the torque converter clutch
(TCC) controls the lock-up clutch by a signal according to
the lock-up range judgement of the TCM when the
vehicle runs.
This function can improve the fuel consumption to almost
the same extent as the manual transmission. The lock-up
solenoid SL is put into B+ by the TCM, so that the
solenoid is actuated with the result of lock-up.
Fail-safe control:
The TCM controls fail-safe by detecting SL solenoid
fai lu re.
Failure detection:
GND SHORT detection
•When SHORT detection continues for 0.3 sec.
•When SHORT failure detection continues 8 times.
Open detection
•When OPEN detection continues for 0.5 sec.
•When OPEN failure detection continues 8 times.
Contents of control:
At failure detection
• Lock-up control inhibit
• If + B short failure is detected, keeps 1st gear when
the vehicle speed calculated by output revolution
sensor is less than 10km/h to prevent stall.
(Canceled at more than 15km/h)
At failure decision
Executes following items in addition to above control
items at failure detection.
•Stores the failure information in failure-memory.
Conditions of turning “CHECK TRANS” lamp off:
NoneReversion conditions from fail-safe:
When a normal condition is judged by rechecking on the
state of lock-up ON/OFF
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) When the key is ON, the voltage between the TCM
connector terminals (C78-12) and (C78-15 or 19) is
1.0 V or less.
(2) When the gear is of the 2nd speed in the D range
and the throttle opening is about 50% at a higher
speed than about 40km/h, the TCM supplies 8 to 16
V, so that the solenoid is actuated with the result of
lock-up.
(3) The resistance range of the solenoid is 11 to 15
.
Diagnostic aids:
In case of faulty connection, open or shorted circuit. to
the TCM terminal (C78-12), DTC P0743 is displayed. A
intermittent failure may be caused by a poor connection,
rubbed through wire insulation or a wire broke inside the
insulation.

7A–42 AUTOMATIC TRANSMISSION (AW30-40LE)
DTC P0748 (FLASHING CODE 35) PRESSURE CONTROL SOLENOID FAILURE (STH)
D07RY00047Circuit description:
The pressure control solenoid is a PWM duty control
solenoid located in the valve body.
The pressure control solenoid is a TCM-controled device
used to regulate transmission throttle pressure by
energizing current from the TCM.
Fail-safe control:
The TCM controls fail-safe by detecting pressure control
solenoid failure.
Failure detection:
IG shor t failure
• When the feedback A/D value is more than 1020 for
500 milli-second continuously.
• Detection inhibit condition: Prohibition during 1 second
after reversion from open failure, because the
possibility of the mis-detection is high.
Open failure (Including GND Shor t)
• When the feedback A/D value is less than 15 for more
than 70 milli-second continuously, judges as faliure,
and turns the current of target output off, after 1.5
second passed turns the current of target value to
normal. The A/D value is checked, and this operation
is repeated during 70 milli-second again.
• When it continues for 12.5 second in total.
Contents of control:
At failure detection
• Lock-up control inhibit
• Up hill and down hill control inhibit
• Squat control inhibit
At failure decision
Executes following items in addition to above control
items at failure detection.
•Turns Solenoid power supply OFF• Blinks "CHECK TRANS" lamp
• Stores the failure information in failure memory
* Prohibits failure detection of S1, S2, SL, STH, selector
position switch, and oil temperature sensor.
Conditions of turning "CHECK TRANS" off:
Turns "CHECK TRANS" lamp off after ignition is turned
ON
OFF ON.
Reversion conditions from fail-safe:
At failure detection
W h e n I G sh o r t fa i l u re ꞏꞏꞏT h e fe e d ba ck A / D va l u e i s
less than 1020 for 1 second continuously.
W h e n o p e n fa i l u re ꞏꞏꞏD e t e c t i o n c r i t e r i a i s n o t s a t i s f i e d
or the feedback A/D value is more than 15 for 1
second continuously.
At failure decision
Recovers at the same time as the conditions of
turning “CHECK TRANS” lamp off are satisfied.
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) The solenoid resistance is within the range of 5 to
5.6
.
(2) This test checks for shor ted circuit at the TCM.
Diagnostic aids:
An intermittent may be caused by a poor connection,
rubbed through wire insulation or a wire broken inside
the insulation. Inspect related harness connector for
backed out terminals, improper mating, broken locks,
improperly formed or damaged terminals, poor terminal
to wire connection and damaged harness.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–45
• Changes solenoid output pattern as following figure
The shift theory at shift solenoid failure
At failure decision
Executes following items in addition to above control
items at failure detection.
•Turns Solenoid power supply OFF
•Blinks "CHECK TRANS" lamp
•Stores the failure information in failure-memory
*Prohibits failure detection of S1, S2, SL, STH,
Selector position switch, and Oil temp. sensor.
Conditions of turning "CHECK TRANS" off:
Turns "CHECK TRANS" lamp off after ignition is turned
ON
OFF ON.
Reversion conditions from fail-safe:
At failure detection
When a normal judgment is obtained by rechecking
during shifting.
At failure decision
Recovers at the same time as the conditions of
turning “CHECK TRANS” lamp off are satisfied.
Test description:
The following numbers correspond to circled numbers on
the diagnostic char t.
(1) With the key "ON", the voltage between the TCM
terminals (C78-4) and (C78-15 or 19) is 8 to 16V.
(2) When the driving wheels revolve with the 3rd speed
gear, the voltage is 1 V or less.
(3) The solenoid resistance is within the range of 11 to
15
.
Diagnostic aids:
In case of faulty connection, open or shor ted circuit to
the TCM terminal (C78-4), DTC P0753 is displayed. A
intermittent failure may be caused by a poor connection,
rubbed through wire insulation or a wire broke inside the
insulation.Shift
lever
Po s i t i o nNormal S1 failure S2 filure S1 and S2 failure
Gear S1 S2 Gear S1 S2 Gear S1 S2 Gear S1 S2
D1
3
1
O/D 2O/D3
O/DO/D
213
1
3 2O/D3
L1313
2O/D