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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 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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.
NOTE:
  • When removing or installing the shift control ECU and shift actuator ECU, make sure there is no power supplied*1 when disconnecting or connecting the connectors.

    *1: Battery, sub-battery, integrated capacitor, etc.

  • When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.
  • Before performing troubleshooting, check the fuses, connector connections and contact pressure of the relevant terminals for this circuit.
  • To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) battery terminal.

    Refer to INSPECTION MODE PROCEDURE [10/2022 - ]

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