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Power Source Circuit: Wiring Diagram

Fig 1: Wiring Diagram - Power Source Circuit
G04049867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER) 
    1. Disconnect the P33 certification ECU connector and P31 door control receiver connector.
    2. Measure the voltage resistance according to the value(s) in the table below.

    Standard 

    STANDARD SPECIFICATION

    Symbol (Tester Connection) Condition Specified Condition
    RC0 (P33-29) - +5 (P31-2) Always Below 1 Ω
    +B1 (P33-1) - Body ground Always 10 to 14 V
    RC0 (P33-29) - Body ground Always 10 kΩ or higher
    E (P33-17) - Body ground Always Below 1 Ω
    Fig 2: Identifying Harness And Connector (Certification ECU - Door Control Receiver)
    G04049868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT CERTIFICATION ECU 
    1. Reconnect the P33 connector.
    2. Measure the voltage according to value(s) in the table below.

    Standard voltage 

    STANDARD VOLTAGE SPECIFICATION

    Symbol(Tester Connection) Condition Specified Condition
    RC0 (P33-29) - E (P33-17) 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
    +B1 (P33-1) - E Always 10 to 14 V
    Fig 3: Identifying P33 Connector Terminal
    G04049869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPLACE CERTIFICATION ECU 

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

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