LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 2009 >> V70 >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Accessory USB Unit (AUU) And Central Electrical Module (CEM) Diagnostic Trouble Codes >> CEM-B102581: Transponder. Bus Signal/Message Failures. Invalid Serial Data Received (2008-10) >> Diagnostic Trouble Code (DTC) Information CEM-B102581 >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code (DTC) Information CEM-B102581: Notes

Condition 

When the remote key is inserted in the ignition, a switch closes. Start control module (SCU) reads out information from the key and sends it on to Central electronic module (CEM). Central electronic module (CEM) checks the received information from the remote key's ID-number.

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 Start Control Unit (SCU)
GLL153174Courtesy of VOLVO CARS CORPORATION

Substitute Value 

Possible Source 

Fault symptom[s]