LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Control System - Diagnostic Codes (09 Of 10)) >> SFI SYSTEM (for Gasoline Model) >> DTC P16B5-15: Multi Flow Control Valve Sensor Circuit Short to Battery or Open [10/2022 - ] >> Procedure

DTC P16B5-15: Multi Flow Control Valve Sensor Circuit Short to Battery or Open [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.
  1. CHECK HARNESS AND CONNECTOR 

    HINT: 

    Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

    Pre-procedure1

    • Disconnect the water control valve connector.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      B41-2 (VCFC) - B41-3 (EFCV) Ignition switch ON 4.5 to 5.5 V V
      B41-1 (FCV) - B41-3 (EFCV) Ignition switch ON 3.0 to 5.0 V V

    Pre-procedure2

    • Turn the ignition switch off and wait for at least 30 seconds.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      B41-2 (VCFC) - B41-1 (FCV) Ignition switch off 190 to 210 kΩ
      B41-3 (EFCV) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    OK 

    REPLACE WATER CONTROL VALVE. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (WATER CONTROL VALVE - ECM) 

    Pre-procedure1

    • Disconnect the water control valve connector.
    • Disconnect the ECM connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      B41-1 (FCV) - B27-72 (FCA) Always Below 1 Ω Ω
      B41-3 (EFCV) - B27-71 (EFCV) Always Below 1 Ω Ω
      B41-1 (FCV) or B27-72 (FCA) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR