DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message [09/2015 - 08/2019]: Procedure

1. Clear the DTCs.

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

   Powertrain > Cruise Control > Clear DTCs 

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the system cannot detect the malfunction.

   1. Turn the engine switch on (IG).
   2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF button).
   3. w/ Full-speed range following function: Drive the vehicle at 5 km/h (3 mph) or more for 5 seconds or more.

      w/o Full-speed range following function: Drive the vehicle at 36 km/h (22 mph) or more for 5 seconds or more.

3. Check the DTCs.

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

   Powertrain > Cruise Control > Trouble Codes 

   Result

   Result	Proceed to
   DTC U0100-87, U0122-87 and U1104-87 are not output	A
   DTC U0100-87, U0122-87 or U1104-87 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. 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] 

Result: 

B 

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