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Home >> Volvo >> 2009 >> S80 Base >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Accessory USB Unit (AUU) And Central Electronic Module (CEM) Diagnostic Trouble Codes >> CEM-B108B24 Start Button Circuit A. General Signal Failures. Signal Stuck High (2012) >> Diagnostic Trouble Code (DTC) Information CEM-B108B24

Diagnostic Trouble Code (DTC) Information CEM-B108B24

Condition 

At the start button there are two switches to indicate the button's position. Switch 1 is directly connected to Central electronic module (CEM) and to Engine control module (ECM). Breaker 2 is a directly connected control signal to central electronic module (CEM). Both switches shall close when the start button is pressed in.

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 Central Electronic Module (CEM)
GLL172895Courtesy of VOLVO CARS CORPORATION

Substitute Value 

Possible Source 

Fault symptom[s]