LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2010 >> RX 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Smart Access System With Push-Button Start (For Start Function) (Diagnostic Codes & Symptom Tests)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> DTC B2286: Runnable Signal Malfunction; DTC P0335: Crankshaft Position Sensor "A" Circuit >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B2286: Runnable Signal Malfunction; DTC P0335: Crankshaft Position Sensor "A" Circuit: Procedure

WARNING: This page is about a different car, the 2011 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) See step   1 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step   2 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ECM) 
    1. Disconnect the A43 connector from the ECM.
      Fig 1: F7 & A43 Connectors
      GTY350766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F7-4 (NE) - A43-7 (NEO) Always Below 1 Ω
      F7-4 (NE) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Power Management Control ECU)      		 *2 Front view of wire harness connector
      (to ECM)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - ECM) 

    OK: Go to next step 

  4. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Power Source Control / Data List.
    5. Read the Data List according to the value(s) in the Techstream.
      POWER SOURCE CONTROL

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Condition Engine condition/Stop or Run Stop: Engine stopped
      Run: Engine running      		 -

      OK

      Stop (engine is stopped) and Run (steering lock is locked) appear on the screen.

    NG → GO TO SFI SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING 

    OK: Go to next step 

  5. CHECK POWER MANAGEMENT CONTROL ECU 
    1. Reconnect the F7 connector to the power management control ECU.
      Fig 2: F7 Connector
      GTY351546Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reconnect the A43 connector to the ECM.
    3. Connect an F7-4 (NE) and body ground.
    4. Check for pulses according to the condition(s) in the table below.

      OK

      Tester Connection Condition Specified Condition
      F7-4 (NE) - Body ground Engine is stopped No pulse generated
      Engine is running Pulse generated (1000 RPM: 200 Hz)
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Power Management Control ECU)

    NG → GO TO SFI SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING 

    OK → See step   6 

  6. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  REMOVAL 
scientia non olet · About LEMON Manuals