Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Throttle Unit And Potentiometer

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-913C is stored if the engine control module (ECM) detects that the basic conditions for adaptation are not met when trying to adapt the throttle unit. If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.

Substitute Value 

• The adaptation is cancelled
• The engine control module (ECM) shuts down the supply to the throttle unit damper motor. The throttle will set itself to the return position.

Possible Source 

• The throttle is sticking or is blocked (oil film, dust etc.)
• Contact resistance or oxidation in the terminals between the engine control module (ECM) and the throttle unit
• Defective throttle unit.

Fault symptom[s] 

• Poor performance.