Opel Frontera UE. Manual - part 1604

 

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Opel Frontera UE. Manual - part 1604

 

 

7A1–38 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P0713/Flashing Code 76 Transmission Fluid Temperature (TFT) Sensor
Circuit High Input

D07R100026

Circuit Description

The TFT sensor is a thermistor that controls the signal
voltage to the PCM.  The PCM supplies a 5–volt reference
signal to the sensor on circuit RED/BLK.  When the
transmission fluid is cold, the sensor resistance is high
and the PCM will sense high signal voltage.  As the
transmission fluid temperature warms to the normal
operating temperature of 100

°

C (212

°

F), the sensor

resistance becomes less and the voltage decreases to
about 1.5 to 2 volts.
This DTC detects a continuous open or short to power in
the TFT signal circuit or the TFT sensor.  This is a type “D”
DTC.

Conditions For Setting The DTC

D

Battery voltage is between 10 and 16 volts.

D

Ignition is “on”.

D

TFT sensor indicating a voltage greater than 4.86
volts.

D

All conditions met for 20 seconds.

Action Taken When The DTC Sets

D

Transmission default temperature will be:

80

°

C (176

°

F) if engine temperature code is set.

100

°

C (212

°

F) if engine temperature is warm.

80

°

C (176

°

F) if engine run time is greater than 5

minutes.

21

°

C (69.8

°

F) if engine run time is less than 5

minutes.

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 connection at the
PCM and at the transmission 7–way connector.  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

Scan tool displays transmission fluid temperature in
degrees. After transmission is operating, the
temperature should rise steadily to about 100

°

C

(212

°

F), then stabilize.

D

The temperature to resistance value scale may be
used to check the TFT sensor at the various
temperature levels to evaluate the possibility of a
“skewed” (mis–scaled) sensor.

A “skewed” sensor could result in hard shifts or TCC
complaints.

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–39

Test Description

The numbers below refer to the step numbers on the
diagnostic chart:
2. This check verifies problem in the TFT sensor circuit.
3. This test simulates a TFT sensor DTC P0712.  If the

PCM recognizes the low signal voltage (high
temperature), and the scan tool displays 146

°

C

(295

°

F) or greater, the PCM and wiring are OK.

4. This test checks the TFT sensor and internal wiring

harness.

DTC P0713/Flashing Code 76 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 7–way connector E–54.
3. Install a fused jumper wire from terminal E54–4(F) to

E54–1(E) 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 E54–4(F) and E54–1(E).

Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)

Go to 

Diagnostic
Aids

Go to 

Step 5

5

1. Disconnect the transmission 7–way connector E–54.
2. Using the J39200 DVOM, measure the resistance between

terminals E54–4(F) and E54–1(E).

Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)

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 Transmission Fluid
Temperature (TFT) Sensor Specifications.)

Go to 

Diagnostic
Aids

Go to 

Step 8

SECTION

7A1–40 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P0713/Flashing Code 76 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 for an open or short to B+.

Was a problem found?

Go to 

Step 13

Go to 

Step 10

10

Check circuit RED/WHT 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:
TFT sensor indicates a voltage less than 4.92 volts for 2
seconds.

2. 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

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–41

DTC P0719/Flashing Code 77 TCC Brake Switch Circuit High (Stuck On)

D07R100028

Circuit Description:

The brake switch indicates brake pedal status to the
Powertrain Control Module (PCM). The brake switch is a
normally–closed switch that supplies battery voltage on
circuit GRY/RED–BRN/RED to the PCM. Applying the
brake pedal opens the switch, interrupting voltage to the
PCM. When the brake pedal is released, the PCM
receives a constant voltage signal. If the PCM receives a
zero voltage signal at the brake switch input, and the
Torque Converter Clutch (TCC) is engaged, the PCM
de–energizes the Torque Converter Clutch Solenoid
Valve (TCC Sol. Valve). The PCM disregards the brake
switch input for TCC scheduling if there is a brake switch
circuit fault (Refer to 

Diagnostic Aids).

When the PCM detects an open brake switch circuit (0
volts, low input) during accelerations, then DTC P0719
sets. DTC P0719 is a type D DTC.

Conditions For Setting The DTC

D

No OSS Assy. DTCs P0722 (Flashing Code 78) or
P0723 (Flashing Code 79).

D

The PCM detects an open brake switch or circuit (0
volts) for 15 minutes without changing for 2 seconds,
and the following events occur seven consecutive
times.
– The vehicle speed is less than 8 km/h (5 mph).
– then the vehicle speed is 8–32 km/h (5–20 mph) for

4 seconds.

– then the vehicle speed is greater than 32 km/h (20

mph) for 4 seconds.

Action Taken When The DTC Sets

D

The PCM does not illuminate the Malfunction
Indicator Lamp (MIL).

D

DTC P0719 stores in PCM history.

Conditions For Clearing The DTC

D

A scan tool can clear the DTC from the PCM history.

D

The PCM clears the DTC from the PCM history if the
vehicle completes 40 warm–up cycles without a
failure reported.

D

The PCM cancels the DTC default actions when the
fault no longer exists and the ignition is OFF long
enough in order to power down the PCM.

SECTION

 

 

 

 

 

 

 

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