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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (7 Of 7) & Circuit Tests >> HYBRID CONTROL SYSTEM (for THS-HEV Model) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" (Hybrid/EV Battery Local Bus) Missing Message; DTC U0110-87: Lost Communication with Drive Motor 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 U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message [10/2022 - ] >> Procedure
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0103-87: Lost Communication with Gear Shift Control Module "A" (Hybrid/EV Battery Local Bus) Missing Message; DTC U0110-87: Lost Communication with Drive Motor 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 U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message [10/2022 - ]: Procedure

  1. CHECK DTC OUTPUT (HEALTH CHECK) 

    Pre-procedure1

    1. According to the display on the GTS, select "Health Check".

      Procedure1

    2. Check for DTCs.

      Result

      Result Proceed to
      Hybrid vehicle control ECU outputs P2530-12. A
      Hybrid vehicle control ECU does not output P2530-12. B

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    A 

    GO TO DTC CHART (P2530-12). Refer to  DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [10/2022 - ] 

    Result: 

    B 

    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 - ] 

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