Transmission - Checking & Inspection: Other Volvo V70 II

Checking the oil temperature sensor

Connect the breakout box. See: Connecting the breakout box

Note. Do not damage components and terminals when test measuring. Handle components and terminals carefully.

Check 1

Connect an ohmmeter between # A7 and #A8 on the breakout box.

Start the engine and run it at idle speed to raise the temperature of the transmission.

For resistance values see the table below.

A test measurement must be taken at all three temperatures. This is to establish if the resistance is correct or not.

Checking the input and output speed sensors for the transmission

Note. The transmission control module (TCM) must not be connected.

Connect the breakout box. See: Connecting the breakout box

Note. Do not damage components and terminals when test measuring. Handle components and terminals carefully.

Check 1

Connect an ohmmeter between the sensor terminals on the breakout box. Check the resistance. The resistance must be more than 1 Mohms but not infinite.

For transmission input speed sensor

1. terminal #12 and #13 on the breakout box

For transmission output speed sensor

1. terminal #19 and #20 on the breakout box

Note. Check the resistance using an ohmmeter which can measure resistances above 10 Mohms.

If the resistance is 0 ohms it means that the cables are short-circuited to each other or that the sensor is faulty.

If resistance is infinite it means that there is an open circuit in the circuit.

Check the wiring. Measure the resistance between a terminal and a ground point.

If the resistance is 0 ohms it means that the cable has a short-circuit to ground.

If resistance is infinite it means that there is an open circuit in the circuit.

Check 2

Connect a temporary voltage supply to

transmission input speed sensor

1. terminal #A12 on the breakout box

transmission output speed sensor

1. terminal #A19 on the breakout box

Connect a temporary ground terminal via a 100 ohms resistor and an ammeter/voltmeter to

transmission input speed sensor

1. terminal #A13 on the breakout box

transmission output speed sensor

1. terminal #A20 on the breakout box

Move the gear selector lever to gear position N . Raise the vehicle so that the drive wheels hang freely. Measure the current/voltage while spinning the wheels in the same direction. For values see the table below.

Checking pressure and temperature sensor

Note. Reading out of oil pressure can take place first after the diagnostic trouble code (DTC) has been deleted. Therefore frozen values should be printed and saved before deleting takes place.

1. Test of pressure sensor. Ignition on. Press the VCT2000 symbol. HINT: Correct pressure shall be 0. 00 +/- 0. 08 MPa. Engine idling Press the VCT2000 symbol. HINT: Correct pressure shall be 0. 38 +/- 0. 08 MPa.
2. Test of temperature sensor. Ignition on. Press the VCT2000 symbol. HINT: Normal value for ambient temperature when the vehicle is cold and (+20 to +50 °C) when the vehicle is driven.

If wrong value is read out, then diagnostic trouble code shall be erased and the sensor changed. After changing sensor, repeat the test procedure again.

Note. There are two types of sensors, an 80 bar and a 40 bar. Differential electronic module (DEM) has hardware number 30759701, 30785483, 30759682, 30783198, 30735844, or 30783018, an 80 bar pressure sensor shall be installed. If Differential electronic module (DEM) has another hardware number than above, a 40 bar sensor shall be installed.

Other information

1. See «Temperature / pressure sensor active on demand coupling (AOC), replacing»(ref-441114-S40843590662011121500000)

Scheme 1938

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO FAULT NOT FOUND: Troubleshooting has been completed.

Checking the oil level (AW50/51 AWD; AW55-50/51SN; 2001-2007)

Note. Oil grade: Only ATF oil, Volvo P/N 1161540-8 (1 liter containers) may be used.

Scheme 1939

The difference between the MAX and MIN volumes is 0. 2 liters. Check the oil temperature in the transmission.

At room temperature (+20 °C) the oil level is close to the MIN mark on the "cold area".

At room temperature (+20 °C) and low oil level the oil barely reaches the dipstick.

The "cold range" (+40 °C) is reached after approximately 15 minutes idling in the workshop, while the "hot range" (+80 °C) is reached after approximately 30 minutes highway driving at an air temperature above +15 °C.

Note. The check must be carried out at an oil temperature of +80 °C. Go to vehicle communication function group 4. Select the digital display parameter. Select the parameter for the transmission oil temperature.

Preparing to check the oil level

Park the car on a level surface.

Apply the parking brake.

Let the engine idle.

Move the gear selector lever to position P.

Move the gear selector through all positions. Wait in each position for approximately 3 seconds

Move gear selector to position P and wait approximately 2 minutes before checking the oil level.

The dipstick must be pushed down as far as possible into the dipstick tube.

Top up with oil through the dipstick pipe

Take account of the temperature when topping up with oil. See Conditions .

High level (overfilling)

Scheme 1940

Undo the drain plug.

Allow some of the oil to drain out and reinstall the plug. Tighten to 40 Nm .

Check the level taking account of the temperature. See Conditions , Preparing to check the oil level and Move the gear selector through all positions. Wait in each position for approximately 3 seconds .

The oil can also be sucked out through the dipstick pipe using an oil suction syringe with a narrow gauge hose.

Note. Strict cleanliness is important.

Scheme 1941

Note. When checking the engine control module (ECM), do not remove the control module from the car before the main relay has interrupted the power supply. This may take up to 4 minutes after the ignition has been switched off and the engine cooling fan (FC) has stopped running.

Inspect the terminals visually when checking, or taking readings from, opened connectors.

Checks

1. Check for oxidation. This can cause poor connections in the terminals
2. Check for damage to pins and terminals. Check that they are properly inserted into the connector. Check that the cable is properly connected to the pin or terminal. Check pins and terminals particularly carefully
3. Using a loose male connector, test to see if the female connector provides a good contact and that the pin remains in place when the male connector is pulled lightly
4. Shake the cable lightly and pull on connectors during measurement to locate damage.

Scheme 1942

An open-circuit in a cable will be indicated by the loss of a function (or functions).

Chafed and broken leads are common causes of faults.

Checks

1. Disconnect the connectors at both ends of the cable.

Check the cables visually according to Inspect terminals visually .

Connect an ohmmeter between the ends of the cable.

The ohmmeter should read approximately 0ohms if there is no open-circuit in the cable.

Shake the cable lightly and pull on connectors during measurement to locate the damage.

If the reading is not correct. Replace the cable and / or continue according to Contact resistance and oxidation .

Scheme 1943

Always check the control module and control module box connectors to ensure that their pins and sockets are not bent or damaged, this may cause faults.

Check pins and terminals particularly carefully.

Scheme 1944

A short-circuit between a live cable and ground is often indicated by the loss of a function or a fuse blowing when a current is passed through the cable.

Checks

1. Check the cables visually according to «Inspect terminals visually»(ref-441113-S03479187172011121500000) . Activate all switches and sensors in the circuit. Check whether the fuse blows
2. Disconnect the connectors in the circuit to ensure that they do not affect readings.

Connect an ohmmeter between cable and ground.

The ohmmeter should read infinite resistance if no components are connected.

Shake the cable lightly and pull on connectors during measurement to locate the damage.

If the reading is not correct, replace the cable and / or continue according to Contact resistance and oxidation .

Scheme 1945

A short-circuit between a cable and supply voltage is often indicated by the loss of a function or a fuse blowing when a current is passed through the cable.

Checks

1. Check the cables visually according to «Inspect terminals visually»(ref-441113-S03479187172011121500000) . Use a voltmeter to take readings at various points in the circuit while operating switches and sensors.

The voltmeter reading depends on the circuit being tested and the positions of switches and sensors. Use the wiring diagram to determine the correct voltage in the circuit.

Use an ohmmeter between the suspect cables to detect short-circuits between them.

The ohmmeter should read infinite resistance between cables not connected to each other in the circuit.

Shake the cable lightly and pull on connectors during measurement to locate the damage.

If the reading is not correct. Replace the cable and / or continue according to Contact resistance and oxidation .

Scheme 1946

Loose connections in terminals may be caused by oxidation of the pins and sockets, or by a faulty connection of a cable to its cable terminal.

Loose connections produce the same faults as an intermittent open-circuit in a cable.

Checks

1. Inspect terminals visually according to «Inspect terminals visually»(ref-441113-S03479187172011121500000) . Continue according to «Contact resistance and oxidation»(ref-441113-S09800912882011121500000) .

Contact resistance and oxidation

In theory, the resistance across contacts, leads and terminals should be 0 ohms. However, there is always some resistance due to terminal oxidation.

If resistance is too great there will be function problems. The magnitude of the resistance before it causes a malfunction depends on the circuit load. A guideline would be a few ohms.

Cleaning female socket terminals and male pin terminals

Scheme 1947

Note. Do not apply rust solvent spray or grease to the catalyst monitor sensor or instrument cluster connectors.

1. Ignition off
2. Disconnect the battery negative terminal
3. Use compressed air to clean the disconnected connector
4. Apply rust solvent spray 1161422 to the disconnected connectors
5. Blow clean using compressed air.

Greasing female terminals

Scheme 1948

Note. Do not fill the protective cover with grease.

1. Press grease, P/N 1161417-9, into the terminals directly from the tube
2. Check that all the cavities in the connectors are filled
3. Use a loose male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.

Scheme 1949

Check terminals visually

Note. When checking the engine control module (ECM), do not remove the control module from the car before the main relay has interrupted the power supply. This may take up to 4 minutes after the ignition has been switched off and the engine cooling fan (FC) has stopped running.

Inspect the terminals visually when checking, or taking readings from, opened connectors.

Checks

1. Check for oxidation. This can cause poor connections in the terminals
2. Check for damage to pins and terminals. Check that they are properly inserted into the connector. Check that the cable is properly connected to the pin or terminal. Check pins and terminals particularly carefully
3. Use a separate male terminal to check the female terminal. Check that they are secure: Pull on the pin.

Open-circuit, permanent faults

An open-circuit in a cable is indicated by a loss of one or more functions.

Chafed and broken cables or terminals that have come loose are common causes of faults in electrical systems.

Checks

1. Disconnect the connectors at both ends of the cable.

Connect an ohmmeter between the ends of the cable.

The ohmmeter should read approximately 0 ohms if there is no open-circuit in the cable.

Always check the control module and control module box connectors to ensure that their pins and sockets are not bent or damaged, as this can cause faults.

Check pins and terminals particularly for this fault. See Check terminals visually .

Short-circuit to ground, permanent faults

A short-circuit between a live cable and ground is often indicated by the loss of a function or a fuse blowing when a current is passed through the cable.

Checks

1. Activate all switches and sensors in the circuit. Check whether the fuse blows
2. Disconnect the connectors in the circuit to ensure that they do not affect readings.

Use an ohmmeter to take a resistance reading between the cable and ground.

The ohmmeter should read infinite resistance if no components are connected.

Check pins and terminals particularly for this fault. See Check terminals visually .

Short-circuit to supply voltage. Permanent faults

A short-circuit between a cable and supply voltage is often indicated by the loss of a function or a fuse blowing when voltage is passed through the cable.

Checks

1. Use a voltmeter to take readings at various points in the circuit while operating switches and sensors.

Voltmeter readings will depend on which circuit is tested and the status of switches and sensors. Use the wiring diagram to determine the correct voltage in the circuit.

Use an ohmmeter between the suspect cables to detect short-circuits between them.

The ohmmeter should read infinite resistance between cables not connected to each other in the circuit.

Check pins and terminals particularly for this fault. See Check terminals visually .

In theory, the resistance across contacts, leads and terminals should be 0 ohms. However, there is always some resistance due to terminal oxidation.

If this resistance becomes too great the result will be a malfunction. The magnitude of the resistance before it causes a malfunction depends on the circuit load.

Checks

1. Check the cables visually according to «Check terminals visually»(ref-441113-S38685087192011121500000) .

Cleaning female socket terminals and male pin terminals

Note. Do not apply rust solvent spray or grease to the catalyst monitor sensor or instrument cluster connectors.

1. Ignition off
2. Disconnect the battery negative terminal
3. Use compressed air to clean the disconnected connector
4. Apply rust solvent spray 1161422 to the disconnected connectors
5. Blow clean using compressed air.

Greasing female terminals

Note. Note Do not fill the protective cover with grease.

1. Press grease, P/N 1161417-9, into the female sockets directly from tube
2. Check that all the terminal cavities are filled
3. Use a loose male pin to ensure that the connection in the sockets is good. The pin should remain in position when pulled gently.

Clutch slave cylinder

Note. As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.

Removing the gearbox

Remove the transmission. Refer to: Transmission, removing .

Scheme 1950

Remove

1. the bolts, x3
2. the clutch cylinder.

Clean the contact surfaces in the clutch housing.

Check for any leakage from the gearbox.

To replace the primary shaft seal, see: Input shaft seal .

Checking the clutch cylinder and the throw-out bearing

Clean the clutch cylinder.

Check the wear, play and noise in the throw-out bearing. There must be no deep grooves on the flat surface which presses onto the clutch.

Check the wear and sealing integrity of the cylinder and the protective bellows. The clutch cylinder and pipe are replaced as a complete unit.

Installing the clutch cylinder

Install

1. the clutch cylinder
2. the bolts, x3 (M6).

Finishing

Install the gearbox. See: Transmission, installing .