Checking The Transmission Input Speed Sensor Signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Connector(s) Reinstallation

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Check the control module and transmission input speed sensor connectors. Check for contact resistance and oxidation. See 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). Check that the transmission speed increases with 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 .
  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

Does the transmission input speed increase with engine speed (RPM)? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to CHECKING WIRING AND SENSORS