P1531

P1531

Diagnosis Information - DME (DFI)

Time information via CAN missing or implausible

NOTE:
- The DME (DFI) control unit receives time information from the instrument cluster at regular intervals (approx. 4 sec.) when the ignition is on.
- The fault is detected when:
- the time information remains unchanged for longer than 60 seconds;
or
- the time information deviates from the internal time of the DME (DFI) control unit;
or
- the time information changes too frequently (e.g. due to a loose contact in the CAN, since switching between the actual time and stand-by time takes place).

Diagnostic conditions
- Instrument cluster ready for operation
- No detection of CAN fault
- Engine running, then:
- Switch off engine, then immediately:
- Switch on ignition for > 10 minutes

Possible fault causes
- Wrong software version in DME (DFI) control unit (e.g. US data for EU vehicle)
- Wrong software version in gateway
- Wrong software version in instrument cluster
- Fault in CAN (e.g. loose contact)
- Instrument cluster faulty