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Room Oscillator Circuit: Wiring Diagram

Fig 1: Wiring Diagram - Room Oscillator Circuit
G04049914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ELECTRICAL KEY OSCILLATOR) 
    1. Disconnect the P33 ECU connector.
    2. Disconnect the oscillator connectors.

    Standard resistance 

    STANDARD RESISTANCE SPECIFICATION

    Tester Connection (Symbols) Condition Specified Condition
    P33-12 (CG5B) - P15-3 (CLGB) Always Below 1 Ω
    P33-11 (CLG5) - P15-1 (CLG3) Always Below 1 Ω
    P33-14 (CG6B) - Q38-3 (CLGB) Always Below 1 Ω
    P33-13 (CLG6) - Q38-1 (CLG4) Always Below 1 Ω
    P33-12 (CG5B) - Body ground Always 10 kΩor higher
    P33-11 (CLG5) - Body ground Always 10 kΩor higher
    P33-14 (CG6B) - Body ground Always 10 kΩor higher
    P33-13 (CLG6) - Body ground Always 10 kΩor higher
    Fig 2: Identifying P33, P15 And Q38 Connector Terminal
    G04049915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR 
    1. Replace the electrical key oscillator.
    2. Check that the entry LOCK/UNLOCK function operates normally.

    OK: 

    Entry LOCK/UNLOCK function operates normally. 

    OK : END (ELECTRICAL KEY OSCILLATOR IS DEFECTIVE) 

    NG : Go to next step 

  3. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CERTIFICATION ECU OUTPUT SIGNAL) 
    1. Reconnect the oscillator and the ECU connectors.
    2. Connect the intelligent tester to the DLC3.
    3. Turn the engine switch on (IG).
    4. Following the display on the tester, select the "ACTIVE TEST".

      SMART KEY (Certification ECU): 

      SMART KEY (CERTIFICATION ECU) CHART

      Item Vehicle Condition/Test Details
      Fr TRANSMITTER Electrical key Oscillator (console) ON/OFF
      Rr TRANSMITTER Electrical key Oscillator (rear seat) ON/OFF
    5. Measure the frequency according to the value(s) in the table below.

    Standard 

    STANDARD SPECIFICATION

    Tester Connection (Symbols) Condition Specified Condition
    P33-12 (CG5B) - P33-11 (CLG5) During ACTIVE TEST Frequency is generated (higher than 0 Hz)
    P33-14 (CG6B) - P33-13 (CLG6) During ACTIVE TEST Frequency is generated (higher than 0 Hz)
    Fig 3: Identifying Certification ECU And P33 Connector Terminal
    G04049916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPLACE CERTIFICATION ECU 

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

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