U0073 Communication bus a off
DTC Logic
DTC
Trouble diagnosis name
DTC detecting condition
Possible causes
U0073
Control Module Communication
Bus "A" Off
When the ignition switch is ON,
TCM detects a bus-off error
continuously for 2 seconds or
more.
Harness or connector
(CA ...
Blower fan on signal
Component Function Check
1.CHECK BLOWER FAN ON SIGNAL
With CONSULT
Turn ignition switch ON.
Select "AIR CONDITIONER" of "BCM" using CONSULT.
Select "FAN ON SIG" in "DATA MONITOR" mode, and check status under the
following condition.
Is the inspection result normal?
YES >> I ...