Checking the transmission input speed sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector(s) Reinstallation

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the control module and transmission input speed sensor connectors. Check for contact resistance and oxidation. Remedy if necessary
• Reinstall the components, reconnect the connectors etc.
• Start the engine
• 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).

  Other information 

  • To access the transmission connector, see Connecting the breakout box, GM automatic transmissions
  • To access the control module connector, see Connecting the breakout box
  • See Checking wiring and terminals
  Fig 3: 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