DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle 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 U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message [11/2021 - 03/2023]: Procedure

1. Clear the DTCs.

   Powertrain > Stop and Start > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Turn the ignition switch off and wait for 30 seconds or more.
2. Start the engine.
3. Perform a road test.
4. Read the DTCs.

   Powertrain > Stop and Start > Trouble Codes 

   Result

   Result	Proceed to
   DTC U0100-87, U0103-87, U0126-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87 or U1170-87 is output	A
   DTC U0100-87, U0103-87, U0126-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87 or U1170-87 is not output	B

Result: 

A 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]