Checking the component and wiring

Fig 1: Identifying Ignition In Off Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

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Ignition off.
Unplug the engine temperature sensor connectors.
NOTE:
The contact is gold-plated which requires the greatest care to not damage the contact, making it unusable.
Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Check the engine temperature sensor's resistance between #1 and #2 (against the sensor).

Remedy as necessary.

Other information
- See Connecting the breakout box
- See Signal specification
- See Component specifications
- See Temperature sensor engine coolant, replacing
- See Checking wiring and terminals
Fig 3: Identifying Engine Coolant Temperature (ECT) Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 5: Identifying Engine Coolant Temperature (ECT) Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.