Diagnostic trouble code (DTC) information ECM-92CD

Condition 

Fig 1: Identifying Throttle Unit And Potentiometer

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the basic conditions for adaptation are not met when trying to adapt the electronic 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 damper motor for the electronic throttle unit. The throttle will set itself to the return position.

Possible Source 

Adaptation of the throttle unit is cancelled because one of the following basic requirements has not been met:

1. Ignition on / engine off
2. The battery voltage must be over 10 V
3. Accelerator pedal (AP) unaffected
4. The vehicle must be stationary (no vehicle speed signal)
5. Engine coolant temperature (ECT) between 5-100°C
6. Intake air temperature (IAT) above 5 °C.

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

Fault symptom[s] 

• Poor performance.