Transmission - Checking Internal Components: Other Volvo S80 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.