Opel Frontera UBS. Manual - part 1447

7A–30

AUTOMATIC TRANSMISSION (AW30-40LE)

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

D07RY00022

Circuit description:
The neutral start switch gives the signals related to the
selector lever position (PRND2L) to the Transmission
Control Module (TCM). The neutral start switch turns on
when the select lever  is shifted to the P, R, N, D, 2 or L
range. The neutral start switch, which is connected to the
starter switch circuit, is available only when the select
lever is in the P or N range
The neutral start switch is connected to the transmission
manual shaft and installed in the transmission case.

Fail-safe condition:
The TCM controls fail-safe by detecting selector position
switch failure.

Failure detection:

(1) OPEN: 

• When all switches are OFF

• When the failure criteria continues for 30 seconds

if the vehicle speed which is calculated by output
revolution sensor is more than 30 km/h and the
engine revolution is more than 1500 rpm.

(2) SHORT: 

• When more than two switches are ON at the same

time.

• When the failure criteria condition for 10 seconds.

Contents of control:
At failure detection

(1) OPEN: D range judgment

(2) SHORT: Judged by priority D>2>L>R>N>P

•Up hill and down hill control inhibit

•Winter mode inhibit

At failure decision

Excutes following items in addition to above control
items at failure detection.

•Blinks "CHECK TRANS" lamp

•Stores the failure information in failure-memory

•Reverse lockout control inhibit

Conditions of turning “CHECK TRANS” off:
Turns “CHECK TRANS” lamp off when only one of all
switches is ON.

Reversion conditions from fail-safe:
Turns “CHECK TRANS” lamp off when only one of all
switches is ON.
Test description:

The following numbers correspond to circled numbers on
the diagnostic chart.

(1) It is judged whether the input signal received from

the neutral start switch by the TCM is proper or not.

(2) The power status of the neutral start switch is

checked.

(3) The continuity between neutral start switch terminals

and the continuity of the wire connected to the
neutral start switch are 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–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