Code 15 (Throttle Switch)
THROTTLE SWITCHExplanation
This defect code is stored when the control unit determines opening or closing of the throttle switch that does not comply with the calculated throttle valve angle or does not correspond to the switch plausibility.
Effect: When defect code is set (Electronic Throttle Control (EML) warning lamp "ON"): Output reduction by limited EML Throttle Valve (DK) opening angle occurs.
NOTE: Particular care must be taken when checking the DK switch and the Pedal Value Sender (PWG) switch with the (status monitoring) to ensure that one of the two switches are "ON" (both switches can also be "ON").
Troubleshooting
- Check DK switch and DK potentiometer with (status monitoring).
- Check voltage supply for potentiometer and throttle (DK) switch (approx. 5 Volt) from the EML control unit to the throttle valve at the throttle valve.
- Check wires from the EML control unit to the throttle valve.
- Check throttle DK switch and throttle (DK) potentiometer for continuity (potentiometer test with oscilloscope).
- Proceed with other displayed scan tool diagnostic instructions where applicable.