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Home >> Volvo >> 1999 >> S80 Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti Lock Brake System (Abs) & Brake Control Module (BCM) Diagnostic Trouble Codes >> Abs-00B4: Communication Control Unit SAS Control Unit Not Initiated (1999-2001) >> Diagnostic trouble code information

Diagnostic trouble code information

Condition 

Fig 1: Control Module For Steering Wheel Angle Sensor
GLL103210Courtesy of VOLVO CARS OF NORTH AMERICA.
NOTE: This diagnostic trouble code applies only to ABS systems equipped with DSTC.

The steering wheel angle sensor (SAS) control unit is initiated by turning the steering wheel in any direction within 120 seconds after the car has been started. The control unit transmits signals from the steering wheel angle sensor on the CAN network which the ABS control unit then receives. If the ABS control unit registers that the steering wheel angle sensor control unit has not been initiated within 120 seconds after start-up, diagnostic trouble code ABS-00B4 is set.

Substitute Value 

Possible Source 

Fault symptom[s]