DTC U0073/86: Control Module Communication Bus OFF [09/2015 - 08/2019]: Procedure

1. Check for malfunctions in the CAN communication system.

   Refer to DIAGNOSIS SYSTEM [09/2015 - 08/2016] , or refer to DIAGNOSIS SYSTEM [08/2016 - 12/2017] , or refer to DIAGNOSIS SYSTEM [12/2017 - 08/2019]

   Result

   Result	Proceed to
   CAN communication DTCs are not output	A
   CAN communication DTCs are output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] 

Result: 

A 

See step  2

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2015 - 08/2019]

   Chassis > Four Wheel Drive > Clear DTCs 

2. Turn the engine switch off.
3. Check if the same DTC is output.

   Refer to DTC CHECK / CLEAR [09/2015 - 08/2019]

   Chassis > Four Wheel Drive > Trouble Codes 

   Result

   Result	Proceed to
   DTC U0073/86 is output	A
   DTC U0073/86 is not output	B

Result: 

A 

REPLACE 4WD ECU ASSEMBLY. Refer to  COMPONENTS [09/2015 - ] 

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 12/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 08/2019]