Sensor Heating Relay
Sensor Heating Relay:Check function:
•D• 300 - This activation is only possible on cylinder bank 1 to 6, it takes place at one second intervals.
The relay remains switched on during normal operation until high engine speeds or loads occur.
Possible causes:
- Wire to DME control unit Pin 23 defective
- Relay or voltage supply not OK.
- Fuse F28 defective