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Home >> Volvo >> 2009 >> XC70 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Headlight Control Module (HCM) Diagnostic Trouble Codes >> HCM-U012600: Lost Communication With Steering Angle Sensor Module. Bus Signal / Message Failures. Missing Message (2008-2011) >> Diagnostic Trouble Code (DTC) Information HCM-U012600

Diagnostic Trouble Code (DTC) Information HCM-U012600

Condition 

The control module is continually supplied with necessary information from the Steering wheel angle sensor module (SAS) via CAN communication. The control module checks the communication with the Steering wheel angle sensor module (SAS).

The diagnostic trouble code (DTC) is stored if the control module detects that:

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

NOTE:

The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Fig 1: Identifying Headlamp Control Module (HCM)
GLL152721Courtesy of VOLVO CARS CORPORATION

Substitute Value 

Possible Source 

Fault symptom[s]