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-913F is stored if the engine control module (ECM) is unable to run its first adaptation of the throttle unit. This is because the programmed parameter for the stop position in the throttle position (TP) sensor has been exceeded. This adaptation is normally run during manufacture of the car. However the throttle unit must be adapted again if software, the engine control module (ECM) or the throttle unit is replaced. If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.

Substitute Value 

• The engine control module (ECM) uses the nominal values for the throttle unit parameters
• 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 

Faulty signal: 

• 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] 

• Malfunction indicator lamp (MIL) lit
• Poor performance.