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Home >> Lexus >> 2009 >> LS 460 AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Source/Wiring >> Electric Power Control System >> DTC B22AB Open in Starter Switch Terminal >> Inspection Procedure

Inspection Procedure

  1. CHECK ELECTRIC POWER CONTROL ECU (STSW SIGNAL) 
    1. Disconnect the A69 ECU connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE REFERENCE CHART

      Tester Connection Switch Condition Specified Condition
      A69-12 (STSW) - Body ground Engine switch on (IG) → cranking Below 1 V → 8 to 14 V
      Fig 1: Identifying A69 ECU Connector Terminals
      G04945737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU) 

      OK: REPLACE PASSENGER SIDE JUNCTION BLOCK (ELECTRIC POWER CONTROL ECU) 

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