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 U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication With Brake System Control Module(ch2) Missing Message [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CLEAR DTC
Result:
NEXT
See step 2
- CHECK DTC OUTPUT
Pre-procedure1
- Turn the ignition switch off and wait for 30 seconds or more.
- Start the engine.
- Perform a road test.
- Read the DTCs.
Powertrain > Stop and Start > Trouble Codes
Result
Result Proceed to U0100-87, U0103-87, U0129-87, U0140-87, U0151-87, U0155-87, U115C-87, U0164-87 or U1170-87 is output A U0100-87, U0103-87, U0129-87, U0140-87, U0151-87, U0155-87, U115C-87, U0164-87 or U1170-87 is not output B
Post-procedure1
- None.
Result:
A
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 08/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2023 - ]
Result:
B
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]