Checking the transmission input speed sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Start the engine and let it run at idle speed
• Gear selector in position P
• Read off the transmission input speed.

  Check that the transmission speed is updated.

  Compare with the engine speed (RPM).

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the speed updated? 

• YES 

  Refer to Intermittent fault 

• NO 

  Refer to Checking wiring and sensors