Room Oscillator Circuit: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM (CERTIFICATION ECU - OUTPUT SIGNAL)

Connect Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Body Electrical / Smart Key / Active Test.

Perform the Active Test according to the display on the tester.

SMART KEY:

Tester Display	Test Part	Control Range	Diagnostic Note
Fr Transmitter	Cabin Oscillator	ON / OFF	-

Measure the frequency according to the value(s) in the table below.

Fig 1: Identifying Certification ECU Connector Terminals

Tester Connection	Condition	Specified Condition
CG5B (D39-12) - CLG5 (D39-11)	During Active Test	Frequency is generated (higher than 0 Hz)
CG6B (D39-14) - CLG6 (D39-13)	During Active Test	Frequency is generated (higher than 0 Hz)

NG → REPLACE CERTIFICATION ECU

OK: Go to next step

CHECK WIRE HARNESS (CERTIFICATION ECU - CABIN OSCILLATOR)
1. Disconnect the D39 ECU connector.
  
  Fig 2: Identifying D39 ECU Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the oscillator connectors.
  
  Fig 3: Identifying Oscillator (Front) Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.
  
  Fig 4: Identifying Oscillator (Rear) Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Resistance
  
  Below 1 Ω
4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.
  Resistance
  
  10 kΩ or higher
  
  HINT:
  
  Refer to WIRING DIAGRAM the wiring diagram for connection of each terminal.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

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