U0073
U0073Diagnosis information - CAN
Gateway (CAN drive) control module, communication
NOTE:
- Internal function test completed.
Diagnostic conditions
The gateway control module initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored.
Gateway control module wake-up through:
- event-induced CAN message
- wake-up signal via wake-up line
- "Ignition on"
Possible fault causes
- No power supply for gateway control module
- Gateway control module is incorrectly coded
- Short circuit or open circuit in the CAN drive
- Gateway control module faulty (in most cases the cause is not the gateway control module but incorrect coding.)
Fault effects
- Communication via the CAN drive is no longer possible.
- No other control modules are able to communicate with the gateway control module.
Affected contacts on the gateway control module connector
Connector A:
- 1 power supply - terminal 30
- 6 CAN drive low
- 11 ground supply - terminal 31
- 13 wake-up
- 14 power supply - terminal 15
- 16 CAN drive high