Checking the connectors

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check the engine speed (RPM) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation . Remedy if necessary.

Check in particular for damage or loose terminal pins.

Reconnect the connectors.

Start the engine. Allow the engine to run at idle speed for 30 seconds.

Ignition off for 30 seconds.

Start the engine. Allow the engine to run at idle speed for 30 seconds.

Read off the status of the diagnostic trouble code (DTC).

Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the status intermittent? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the wiring and components