Opel Frontera UBS. Manual - part 1503

7A1–42 TRANSMISSION CONTROL SYSTEM (4L30–E)

5. This test checks the TFT sensor and internal wiring

harness.

Resistance Chart

°

C

°

F

Resistance (k

W

)

–40

–40

672

0

32

65

20

68

25

80

176

2.5

120

248

0.78

150

304

0.37

DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input 

Step

Action

Yes

No

1

Perform the transmission fluid checking procedure.
Refer to Checking Transmission Fluid Level and Condition in
Automatic Transmission (4L30–E) section.

Was the fluid checking procedure performed?

Go to Step 2

Refer to

Checking

Transmission

Fluid Level and

Condition in

Automatic

Transmission

(4L30–E) section

2

1. Install the scan tool.
2. With the engine “off”, turn the ignition switch “on”.

NOTE: Before clearing DTC(s), use the scan tool to record “Failure
Records” for reference, as data will be lost when the “Clear Info”
function is used.

3. Record the DTC “Failure Records”.

Does the scan tool display a TFT sensor signal voltage greater
than 4.86 volts?

Go to Step 3

Go to Diagnostic

Aids

3

1. Turn the ignition “off”.
2. Disconnect the transmission 16–way connector H–53.
3. Install a fused jumper wire from terminal 3(C) to 5(D) on the

engine harness.

4. Turn the ignition “on”.

Does the TFT signal voltage drop to less than 0.4 volts?

Go to Step 4

Go to Step 9

4

1. Turn the ignition “off”.
2. Using the J39200 DVOM, measure the resistance between

terminals 3(C) and 5(D).

Is the resistance within specifications? (See Resistance Chart.)

Go to Diagnostic

Aids

Go to Step 5

5

1. Disconnect the transmission 5–way connector M–6.
2. Using the J39200 DVOM, measure the resistance between

terminals 3(C) and 5(D).

Is the resistance within specifications? (See Resistance Chart.)

Go to Diagnostic

Aids

Go to Step 6

6

1. Remove the transmission oil pan.
2. Check the internal wiring harness for an open. Refer to

Transmission Oil Temperature Sensor (Adapter Case) in
Automatic Transmission (4L30–E) section.

Was a problem found and corrected?

Go to Step 13

Go to Step 7

7

1. Disconnect the internal wiring harness at the TFT sensor.
2. Measure the resistance of the TFT sensor.

Is the resistance within specifications? (See Resistance Chart.)

Go to Diagnostic

Aids

Go to Step 8

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–43

DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input  (Cont’d)

Step

No

Yes

Action

8

Replace TFT sensor. Refer to Transmission Oil Temperature
Sensor (Adapter Case) in Automatic Transmission (4L30–E)
section.

Is the replacement complete?

Go to Step 13

—

9

Check circuit RED/BLK–GRN/RED for an open or short to B+.

Was a problem found?

Go to Step 13

Go to Step 10

10

Check circuit GRY–GRN for an open.

Was a problem found?

Go to Step 13

Go to Step 11

11

Check the PCM for faulty or intermittent connections.

Was a problem found?

Go to Step 13

Go to Step 12

12

Replace the PCM. Refer to Powertrain Control Module (PCM) in
Automatic Transmission (4L30–E) section.

Is the replacement complete?

Go to Step 13

—

13

1. After the repair is complete, use the scan tool to select “DTC”,

then “Clear Info” function and ensure the following conditions
are met:

2. TFT sensor indicates a voltage less than 4.92 volts for 2

seconds.

3. Review the scan tool “DTC Info”.

Has the last test failed or is the current DTC displayed?

Begin diagnosis

again

Go to Step 1

Repair verified
Exit DTC table

7A1–44 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P0719 TCC Brake Switch Circuit High (Stuck On)

D07RW032

Circuit Description

The TCC brake switch is used to indicate brake pedal
status.  The normally opened brake switch signal voltage
circuit is opened.
Brake switch supplies a B+ signal on circuit GRN/YEL to
the PCM when the brakes are applied.  The PCM uses
this signal to deenergize the TCC solenoid when the
brakes are applied.
This DTC detects a closed brake switch during
accelerations.  This is a type “D” DTC.

Conditions For Setting The DTC

D

No OSS DTCs P0722 or P0723.

D

The PCM detects a closed brake switch/circuit (12
volts) for 2 seconds, and the following events occur
seven consecutive times: vehicle speed is less than 8
km/h (5 mph); then vehicle speed is between 8 and 32
km/h (5 and 20 mph) for 4 seconds; then vehicle
speed is greater than 32 km/h (20 mph) for 4 seconds.

Action Taken When The DTC Sets

D

If throttle opening is greater than 10% and vehicle
speed is greater than 45 km/h (28 mph), then
disregard brake switch contingency for TCC off
mode.

D

The PCM will not illuminate the CHECK TRANS
Lamp.

Conditions For Clearing The DTC

D

The DTC can be cleared from the PCM history by
using a scan tool.  

D

The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.

D

The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled “off”
long enough to power down the PCM.

Diagnostic Aids

D

Inspect the wiring for poor electrical connections at
the PCM and TCC brake switch.  Look for possible
bent, backed out, deformed or damaged terminals.
Check for weak terminal tension as well.  Also check
for a chafed wire that could short to bare metal or
other wiring.  Inspect for a broken wire inside the
insulation.

D

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

D

Check customer driving habits and/or unusual driving
conditions (i.e. stop and go, highway).

D

Check brake switch for proper mounting and
adjustment.

Test Description

The numbers below refer to the step numbers on the
diagnostic chart:
2. This test checks for voltage at the brake switch.
5. This test checks the brake switch.
8. This test checks circuit GRN/YEL at the PCM.

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–45

DTC P0719 TCC Brake Switch Circuit High (Stuck On) 

Step

Action

Yes

No

1

1. Install the scan tool.
2. With the engine “off”, turn the ignition switch “on”.  If ABS code

is set, check applicable fuse.

NOTE: Before clearing DTC(s), use the scan tool to record “Failure
Records” for reference, as data will be lost when the “Clear Info”
function is used.

3. Record the DTC “Failure Records”.
4. Apply then release the brake pedal.

Does the scan tool display “TCC Brake Switch” as “closed” with
the brake pedal applied, and then display “open” when the brake
pedal is released?

Go to Diagnostic

Aids

Go to Step 2

2

1. Connect the test light to ground.
2. Back probe ignition feed circuit terminal B13–1 at the brake

switch.

Is the test light “on”?

Go to Step 3

Go to Step 4

3

1. Connect the test light to ground.
2. Back probe circuit terminal B13–4 at the brake switch.

Is the test light “off”?

Go to Step 7

Go to Step 5

4

Repair the open in battery feed circuit terminal B13–1 to the brake
switch.
If fuse is open, check circuit terminal B13–4 for a short to ground.

Is the repair complete?

Go to Step 13

—

5

Disconnect brake switch connector B–13 and ignition switch “on”.

Is the test light “on”?

Go to Step 8

Go to Step 6

6

Check the brake switch short (B13–1 and B13–4).

Was a problem found?

Go to Step 9

Go to Step 10

7

Check circuit terminal B13–4 for a short to voltage.
Ignition switch “on”.

Is the test light “on”?

Go to Step 8

Go to Step 10

8

1. Disconnect the J3 (BLUE) PCM connector.
2. Check circuit terminal B13–4 for a short to voltage.

Was a problem found?

Go to Step 13

Go to Step 10

9

Replace the brake switch.

Is the replacement complete?

Go to Step 13

—

10

1. Turn the ignition “off”.
2. Reconnect the J3 (BLUE) PCM connector.
3. Turn the ignition “on”.

Does the scan tool display “TCC Brake Switch” as “open” with the
brake applied, then display “closed” with the brake pedal
released?

Go to Diagnostic

Aids

Go to Step 11

11

Check the PCM for faulty or intermittent connections.

Was a problem found and corrected?

Go to Step 13

Go to Step 12