Intermittent fault

Check control module and speed (RPM) sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check power supply cable between control module #A59 and transmission connector #16 for an intermittent open-circuit according to Open-circuit, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check signal cable between control module #A41 and transmission connector #17 for an intermittent open-circuit according to Open-circuit, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Remedy as necessary.

Other information: 

• To connect the breakout box, see Connecting breakout box, Transmission control module (TCM) .
• To disconnect control module, see Replacing the gearbox control module (TCM) .
• To disconnect transmission connector, see Inspecting/cable harness to solenoids .
• For information about signals, see Signal specification, Transmission control module (TCM) .

Fig 2: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Transmission Connector Terminal 16 & 17

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information