DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message [05/2019 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [05/2019 - ]

   Body Electrical > Road Sign Assist > 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.

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [05/2019 - ]

   Body Electrical > Road Sign Assist > Trouble Codes 

   OK

   DTCs U0100-87, U0125-87, U0129-87, U0140-87 and U0155-87 are not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2019 - 10/2019]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2019 - 07/2020]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

NG 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2019 - ]