Checking the control module

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Connecting Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• The breakout box connected
• Connect the control module.
• Transmission connector disconnected
• Ignition on
• Gear selector in position P.

  Check the transmission control module (TCM). Measure the voltage between terminal #51 (#A51) and terminal #53 (#A53) on the breakout box. The voltage must be approximately 0 V.

  Try a new control module if the voltage exceeds 1 V.

  NOTE:

  When removing the transmission connector, the control module may store diagnostic trouble codes (DTCs) for the gear-shift position sensor, the shift solenoids and the temperature sensor.

  Other information: 

  • To disconnect the transmission connector, see Connecting the breakout box, GM automatic transmissions
  • To replace the control module, see Transmission control module (TCM), replacing
  • For information about signals, see Signal specification .
  Fig 4: Identifying Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 5: Identifying Volts Display

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was the voltage above 1 V? 

• YES 

  Refer to Verification 

• NO 

  Refer to Check the circuit for the solenoid SL