Checking Communication

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

• Ignition on.

  Check the communication with the battery monitoring module (BMS) by clicking the VCT2000 symbol in VIDA (Volvo scan tool).

  If the readout indicates that the communication is OK, despite the diagnostic trouble code CEM-B11DB87 being stored, then this means that the fault is intermittent. If the diagnostic trouble code's counter indicates that the fault has been stored many times then the battery monitoring module (BMS) should be replaced.

  NOTE:

  It takes approx. 10 seconds after the engine has been started before the fault in the communication with the control module for the battery monitoring module (BMS) is detected.

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

Is communication established? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to REPLACING THE CONTROL MODULE