Diagnostic Trouble Code (DTC) Information

ECM-903F THROTTLE UNIT, INTERNAL FAULT
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION

Condition
The engine control module (ECM) has registered that the throttle position sensor does not follow the desired value. Diagnostic trouble code (DTC) ECM-903F is stored in the engine control module (ECM).

Substitute value
- the accelerator pedal (AP) is ignored when braking
- the cruise control cannot be activated
- the engine speed (RPM) is limited using fuel shut off. The maximum permitted engine speed depends on the accelerator pedal (AP) position.

Possible source
- the power supply to the throttle unit
- something is blocking the throttle position sensor (an oil film, dust etc.)
- loose connections or contact resistance in the connectors
- poorly charged battery or corroded in the connecting cables
- defective throttle unit.

Fault symptom[s]
- the accelerator pedal (AP) is ignored when braking
- the cruise control cannot be activated
- uneven idle
- jerks during engine braking
- the ETS warning lamp lights (C70 and S/V70 -2000 only).