P1606

P1606

Diagnosis information - CAN

Fault entry in specified control unit

NOTE: Internal function test completed.

Diagnostic conditions
The control unit initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored.
Control unit wake-up through:

- Event-induced CAN message
- Wake-up signal via wake-up line
- key contact (terminal S)
- Ignition on

Possible fault causes
- Control unit is incorrectly coded
- Periphery connected to specified control unit is incorrect
- Control unit faulty (in most cases the cause is not the control unit but incorrect coding.)

Fault effects
- The specified control unit sends only substitute values via the CAN.
- Other control units detect these substitute values and set this fault code.