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Home >> Lexus >> 2009 >> LS 460L AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication >> Can Communication System >> DTC U0131 Lost Communication with Power Steering Control Module >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the A44 power steering ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A44-5 (PGND) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      A44-6 (+B) - Body ground Always 11 to 14 V
      A44-9 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Fig 1: Identifying A44 Power Steering ECU Connector Terminals
      G06198494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE POWER STEERING ECU  (See REMOVAL )

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