DTC U0100-00: Lost Communication with ECM/PCM "A" Missing Message (Powertrain Bus); DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U0155-86: Lost Communication with Instrument Panel Cluster (IPC) Control Module Signal (some circuit quantity, reported via serial data) Invalid; DTC U1103-00: Lost Communication with Stop and Start Control Module Missing Message (Powertrain Bus); DTC U1107-00: Lost Communication with Power Management Module (Gear Shift Control Module "A"); DTC U114F-00: Lost Communication with Power Integration Module (System 2) Missing Message; DTC U1170-00: Lost Communication with Brake System Control Module (Gear Shift Control Module "A") [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.

CHECK DTC OUTPUT (HEALTH CHECK)

Pre-procedure1

Turn the ignition switch to ON.

Using the GTS, perform a Health Check.

Result

Proceed to
NEXT

Post-procedure1

Turn the ignition switch off.

Result:

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 - ]