Checking wiring and connectors

Check the connector on the engine coolant temperature (ECT) sensor. Check for contact resistance and oxidation. Check for loose connections.

Other information

To connect the breakout box, see connecting the breakout box
To access the control module, see engine control module (ECM), replacing
To access the engine coolant temperature (ECT) sensor, see engine coolant temperature (ECT) sensor, replacing
For information about signals see Signal specification
See Checking wiring and terminals .

Fig 1: Identifying engine Coolant Level Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.