Checking the Oil Temperature Sensor

Fig 1: Identifying Transmission Control Module Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

See Connecting the Breakout Box

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.