P1543
P1543Diagnosis information - DME (DFI)
Throttle valve adjusting unit - start test
NOTE: When the engine is started, the throttle valve is opened by a certain value, and must then close on its own.
Diagnostic conditions
- Adaptation performed
- Vehicle is stationary
- No gear selected, selector lever in N or P
- Intake air temperature > 5 °C (41 °F)
- Engine idling, then:
- short rev-up, then:
- Engine speed > 2,200 rpm
Possible fault causes
- Throttle valve adjusting unit faulty