Checking wiring and sensors

Fig 1: Identifying Ignition OFF

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.

  Check the power supply cable between control module terminal #59 (#A59) and transmission connector terminal #S (#A16). Check for an open-circuit. Check for a short-circuit to ground.

  Check the signal cable between control module terminal #41 (#A41) and transmission connector terminal #V (#A19). Check for an open-circuit. Check for a short-circuit to ground.

  Remedy as necessary.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box
  • To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions
  • For information about signals, see Signal specification
  • See Checking wiring and terminals
  Fig 2: Identifying Ohm Meter

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Transmission Speed Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected in the cables or terminals? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the control module