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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Electronic A/T Shift Lever System - Diagnostic Codes (2 Of 2) & Circuit Tests) >> Electronic Shift Lever System >> 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 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

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.

HINT: 

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the All Readiness check procedure.

Refer to UTILITY [10/2022 - ]

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Turn the ignition switch to ON and wait for 1 minute or more.
  4. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  5. Check the DTC judgment result.

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE, perform driving pattern again.
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