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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Theft Deterrent System (W/O Smart Key) (Diagnostics & Circuit Tests) (Hybrid) >> THEFT DETERRENT SYSTEM (w/o Smart Key System) >> ECU Power Source Circuit >> Procedure

ECU Power Source Circuit: Procedure

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU (POWER SOURCE) 
    1. Disconnect the 1D junction block connector.
      Fig 1: Identifying 1D Junction Block Connector
      GTY182371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      1D-16 - Body ground Always 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND) 
    1. Disconnect the 1F and 1M junction block connectors.
      Fig 2: Identifying 1F & 1M Junction Block Connectors Terminals
      GTY199695Courtesy 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
      1F-10 - Body ground Always Below 1 Ω
      1M-9 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   3 

  3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE  
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