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Home >> Lexus >> 2009 >> LS 460 RWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication >> Can Communication System >> DTC U0141 Lost Communication with Body Control Module "A" >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the LA, LD and LH rear junction block ECU connectors.
      Fig 1: Identifying LA, LD And LH Rear Junction Block ECU Connector Terminal
      G06198499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      LA-43 (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 Condition Specified Condition
      LD-4 (MPXB) - Body ground Always 11 to 14 V
      LH-1 (+BS1) - Body ground Always 11 to 14 V
      LH-1 (+BS2) - Body ground Always 11 to 14 V
      LH-1 (+BT1) - Body ground Always 11 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE REAR JUNCTION BLOCK ECU 

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