P2336

P233600

Diagnosis information DME control unit

Knock sensor 1

DANGER
High voltage.
Death or severe injuries due to high voltage or high current.

- De-energise the vehicle in accordance with the guidelines.
- Work must not be performed on parts carrying a high voltage.

The control unit must be active in order to test internal function sequences and diagnosable inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check, erase the fault memory, meet the diagnostic conditions and read out the fault memory again.

Diagnostic conditions
- Engine running

Possible fault causes
- Loose contact or corrosion on connectors or lines
- Short circuit to B+/ground/between lines or open circuit in the lines
- Knock sensor 1 loose or braced
- Knock sensor 1 Faulty
- Level Engine oil too low
- Engine Faulty (Mechanical fault)

Fault setting condition(s)
- The fault is detected if the signal of the knock sensor changes insufficiently or is too weak (noise is >>quieter<< than expected).

Fault effects
- If the fault is stored, the ignition timing is retarded for all cylinders in the [knock-control active] range.