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Power Source Circuit: Procedure

  1. INSPECT CERTIFICATION ECU (+B TERMINAL) 
    1. Measure the voltage according to value(s) in the table below.
      Fig 1: Identifying E58 Certification ECU Connector (+B Terminal)
      GTY197455Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Symbol
      (Tester Connection)      		 Condition Specified Condition
      +B (E58-1) - E (E58-17) Always 10 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT CERTIFICATION ECU (RC0 TERMINAL) 
    1. Measure the voltage according to value(s) in the table below.
      Fig 2: Identifying E58 Certification ECU Connector (RC0 Terminal)
      GTY197456Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Symbol
      (Tester Connection)      		 Condition Specified Condition
      RC0 (E58-29) - E (E58-17) Engine switch off, all doors closed and transmitter switch not pressed Below 1 V
      Engine switch off, all doors closed and transmitter switch pressed 4.6 to 5.4 V

    OK → See step   4 

    NG: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY - BODY GROUND) 
    1. Disconnect the E58 certification ECU connector.
    2. Measure the voltage and resistance according to value(s) in the table below.
      Fig 3: Identifying E58 Certification ECU Connector
      GTY206683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard

      Symbol
      (Tester Connection)      		 Condition Specified Condition
      RC0 (E58-29) - Body ground Always Below 1 V
      Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE CERTIFICATION ECU 

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER) 
    1. Disconnect the O18 door control receiver connector.
      Fig 4: Checking Harness And Connector (Certification ECU -- Door Control Receiver)
      GTY197453Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Symbol
      (Tester Connection)      		 Condition Specified Condition
      RC0 (E58-29) - +5 (O18-2) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 5: Checking Harness And Connector (Body Ground)
      GTY197468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Symbol
      (Tester Connection)      		 Condition Specified Condition
      GND (O18-6) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

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