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Home › Lexus › 2009 › LS 460L AWD › Repair and Diagnosis › Engine Mechanical › Starter › Starting › Smart Access System With Push-Button Start › DTC B2281 "P" Signal Malfunction › Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU) 
    Fig 1: Identifying Shift Lock Control ECU Connector Terminal And Main Body ECU Connector Terminal
    G04943847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A68 main body ECU connector.
    2. Disconnect the L47 shift lock control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A68-2 (P) - L47-11 (P2) Always Below 1 Ω
      A68-2 (P) or L47-11 (P2) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step. 

  2. CHECK SHIFT LOCK CONTROL ECU (OPERATION) 
    1. Temporarily replace the shift lock control ECU with a new or normally functioning one.
    2. Check that the engine starts normally.

      OK: Engine starts normally. 

      NG: REPLACE MAIN BODY ECU 

      OK: END (SHIFT LOCK CONTROL ECU IS FAULTY) 

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