Ford Focus MK2 DTC U1900 Tips

Just as a matter of interest and a lot of time saving for others with no start and communication problems on MK2 Focus, all the permanent faults listed below and failure to communicate with 3 further modules were all the result of just 1 x 3amp fuse.

F30 3amp engine bay fuse box engine and transmission control module.
ABS 1 code:
U1900 can-bus comm fault receive error

Instrument cluster 6 codes:
B1318 battery volt low
B210 antenna not connected
U2200 missing invalid data for odometer
B1681 pats transceiver module not received
U1900 can-bus comm fault receive error
U2510 invalid security data received from powertrain ECU

TPS 1 code:
U1900 can comm bus fault receive error

Airbag 1 code:
B1318 battery voltage low

Remote keyless entry 6 codes:
B1318 battery voltage low
B2103 antenna not connected
U220 missing or invalid data for odometer
B1681 pats transceiver module not received
U1900 can-bus comm fault receive error
U2510 invalid security data received from powertrain ECU