Checking the transmission input speed sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the control module and transmission output speed sensor connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation
• 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. 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 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking wiring and sensors