Intermittent Fault

HINT: Check the communication cable between gear selector control module terminal #2 and transmission control module (TCM) terminal #B31 (#B21). Check for an intermittent open-circuit. See  OPEN-CIRCUIT, INTERMITTENT FAULTS  . Check for contact resistance and oxidation. See  CONTACT RESISTANCE AND OXIDATION  . 

Remedy as necessary.

Other information: 

• To connect the breakout box, see CONNECTING THE BREAKOUT BOX
• For information about signals, see SIGNAL DESCRIPTION. TRANSMISSION CONTROL MODULE (TCM) .

Fig 1: Identifying Breakout Box

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS CORPORATION

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  Refer to INFORMATION