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Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the P33 certification ECU connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection (Symbols) Condition Specified Condition
      P33-1 (+B1) - Body ground Always 10 to 14 V
      P33-18 (IG) - Body ground Engine switch OFF Below 1 V
      Engine switch ON (IG) 10 to 14 V
      P33-19 (ACC) - Body ground Engine switch OFF Below 1 V
      Engine switch ON (ACC) 10 to 14 V
    3. Measure the resistance according to the value (s) in the table below.
      Fig 1: Identifying P33 Certification ECU Connector
      G05828049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection (Symbols) Condition Specified Condition
      P33-17 (E) - Body ground Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

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