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Inspection Procedure

  1. CHECK WHETHER DTC OUTPUT RECURS 
    1. Clear the DTCs (see DTC CHECK/CLEAR  ).
    2. Start the engine.
    3. Allow the engine to idle for 1 minute or more.
    4. Read DTCs.

      Result 

      RESULT REFERENCE

      Display (DTC output) Proceed to
      B2271 A
      No DTC output B

      B: END (SYSTEM IS OK) 

      A: Go to next step. 

  2. INSPECT FUSE (AM2) 
    1. Remove the AM2 fuse from the passenger side junction block.
    2. Measure the resistance of the fuse.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      AM2 fuse Always Below 1 Ω

      NG: REPLACE FUSE 

      OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) 
    Fig 1: Identifying Main Body ECU Connector Terminal
    G04943829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L12, L13 and DA main body ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      L13-6 (AM1) - Body ground Always 11 to 14 V
      L12-1 (AM2) - Body ground Always 11 to 14 V

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      DA-40 (GND1) - Body ground Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE MAIN BODY ECU 

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