DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU [06/2016 - ]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [06/2016 - ] ).
2. Turn the ignition switch off.
3. Start the engine.
4. Drive the vehicle at a speed of 15 km/h (9 mph) or more and turn the steering wheel to the right and left.
5. Check that no CAN communication system DTC is output (Refer to DIAGNOSIS SYSTEM [06/2016 - 03/2017] Refer to DIAGNOSIS SYSTEM [03/2017 - ] ).
6. If VSC system DTCs are output, record them (Refer to DTC CHECK / CLEAR [06/2016 - ] ).

   Result

   Result	Proceed to
   DTC is not output.	A
   DTC is output.	B
   CAN communication system DTC is output.	C

   HINT: 

   The CAN communication system must be normal when performing troubleshooting for sensor DTCs (for VSC system).

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - 03/2017] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] )

Result: 

B 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2016 - ] )

Result: 

C 

INSPECT CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - 03/2017] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] )