2012 Lexus RX 450h 3.5L Eng VIN CFACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. CHECK AUXILIARY BATTERY VOLTAGE 
    1. Check the auxiliary battery voltage.

      Standard Voltage

      11 to 14 V

  2. SKID CONTROL ECU INSPECTION 
    1. Measure the voltage between each terminal or between each terminal and body ground.
    2. Connect the Techstream to the DLC3, and check the communication condition with the skid control ECU.
    3. Using an oscilloscope, check the pulse generated between each terminal or between each terminal and body ground.
      NOTE:
      • Inspection should be performed from the back of the connector with the connector connected to the skid control ECU.
      • The voltage between the terminals of the brake actuator assembly may become 0 V due to the fail safe function when the brake warning light / yellow (minor malfunction) comes on (malfunctioning).
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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