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