Opel Frontera UBS. Manual - part 2542

 

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Opel Frontera UBS. Manual - part 2542

 

 

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–31

DTC P0705 (FLASHING CODE 17) GEAR SELECTOR FAILURE (PRND2L)

DTCP0705

7A–32

AUTOMATIC TRANSMISSION (AW30-40LE)

DTC P0710 (FLASHING CODE 16) OIL TEMPERATURE SENSOR FAILURE (OT2)

D07RY00021

Circuit 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/176

°

F) 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

start is less than 15 and the minnum A/D value is
more than 1000 (-10

°

C) from engine start.

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-memory

At 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 – 150

°

C 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 chart.

(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 converts 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 starts 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 chart.

(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.

 

 

 

 

 

 

 

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