Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Engine Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-919A is stored if the engine control module (ECM), when the engine is running, registers that the internal governor for control of the throttle angle in the throttle unit is defective or that the control signal for the governor is too low when controlling the throttle.

Substitute Value 

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
• Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
• Short-circuit to each other in the wiring for the damper motor in the throttle unit
• Defective throttle unit
• Faulty software in the engine control module (ECM).

Fault symptom[s] 

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