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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Dynamic Stability Assist (DSA) & Engine Control Module (ECM) Diagnostic Trouble Codes >> DSA-121: DSA Switch. Signal Too Low (B4204T2 CVVT; 2000) >> Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying DSA Switch
GLL112795Courtesy of VOLVO CARS OF NORTH AMERICA.

When the DSA switch is not activated, the signal to the DSA control module is high. The signal to the DSA control module is grounded when the switch is pressed in. This engages or disengages the DSA function. Diagnostic trouble code (DTC) DSA-121 is stored if the DSA control module registers that the signal from the switch is low for more than approximately 60 seconds when the engine is running.

NOTE:

The diagnostic trouble code (DTC) can then be stored if the DSA button is held pressed in for more than approximately 60 seconds. Fault causes of this type are not included in the fault-tracing procedure.

Substitute Value 

The DSA function is disengaged.

Possible Source 

Fault symptom[s]