DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

4. 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. Drive the vehicle at 40 km/h (25 mph) or more for 5 seconds or more.
5. Enter the following menus: Powertrain / Radar Cruise1 / Trouble Codes.*1
6. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.*2
   • *1: Stored in the ECM
   • *2: Stored in the driving support ECU Assembly
7. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Result

   Result	Proceed to
   DTC U0100, U0122, U0125, U0126, U0129 and U1104 are not output	A
   DTC U0100, U0122, U0125, U0126, U0129 and/or U1104 are output	B

8. Turn the engine switch off.

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ]