Checking the transmission input speed sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Gear selector in position P
• Start the engine. Allow the engine to idle
• Read off the transmission input speed.

  Depress the accelerator pedal (AP) and check that engine speed (RPM) is updated.

  Fig 2: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the speed updated? 

• YES 

  Refer to Intermittent fault 

• NO 

  Refer to Checking wiring and sensors