Checking the connectors

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Check the engine coolant temperature (ECT) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation and loose connections according to Loose connections (terminals) . Check for damage carefully.
Other information:
- To connect the breakout box, see Connecting the breakout box. EMS 2000
- For information about signals, see Signal specification
- To replace the thermostat, see Checking / replacing the thermostat
- To replace the engine coolant temperature (ECT) sensor, see Replacing the engine coolant temperature (ECT) sensor .
Fig 2: Identifying Engine Coolant Temperature (ECT) Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying EMS2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

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