2013 Lexus LS 460L AWDFACTORY OEM SERVICE PROCEDURE

DTC C1365/54: Accumulator Pressure Sensor Malfunction: Procedure

  1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR) 
    1. Disconnect the A19 ECU connector.
    2. Disconnect the A27 actuator connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      A19-9 (PCK1) - A27-37 (PCK1) Always Below 1 Ω
      A19-26 (PAC1) - A27-46 (PAC1) Always Below 1 Ω
      A19-27 (VCM) - A27-35 (VCM) Always Below 1 Ω
      A19-28 (E) - A27-45 (E) Always Below 1 Ω
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      A19-9 (PCK1) - Body ground Always 10 kΩ or higher
      A19-26 (PAC1) - Body ground Always 10 kΩ or higher
      A19-27 (VCM) - Body ground Always 10 kΩ or higher
      A19-28 (E) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. RECONFIRM DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .
    2. Turn the engine switch on (IG).
    3. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR [09/2012 - ] .

      HINT: 

      Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

      RESULT

      Result Proceed to
      DTC (C1365/54) is output A
      DTC (C1365/54) is not output B

    B → END 

    A: Go to next step 

  3. CHECK FREEZE FRAME DATA 
    1. Check the information code from the "FREEZE FRAME DATA" memorized when the DTC (C1365/54) is stored. Refer to FREEZE FRAME DATA [09/2012 - ] .
      RESULT

      Result Proceed to
      Sensor power supply voltage trouble code (211) is output A
      Sensor output value trouble codes (212, 214 and 215) are output B

    B → See step   5 

    A → See step   4 

  4. REPLACE SKID CONTROL ECU. Refer to  REMOVAL [09/2012 - ] 
  5. REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [09/2012 - ] 
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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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