Intermittent fault

Check the transmission control module (TCM) and transmission connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check the power supply cable between control module terminal #11 and terminal #2 on the white 2-pin transmission connector. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check the signal cable between control module terminal #12 and the terminal #1 on the black 2-pin transmission connector. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Remedy as necessary.

Other information: 

• To connect the breakout box, see Connecting the breakout box
• To disconnect the control module, see Replacing the transmission control module (TCM)
• To disconnect the transmission connectors, see Transmission connectors
• To check or replace the transmission speed sensor, see Replacing the engine speed (RPM) sensor
• For information about signals, see Signal description. Transmission control module (TCM) .

Fig 2: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information