Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Following the display on the tester, select the "ACTIVE TEST".

   Certification ECU 

   ECU CERTIFICATION REFERENCE
   
   

   Item	Vehicle Condition / Test Details
   Fr TRANSMITTER	Cabin Oscillator ON / OFF

4. Measure the frequency according to the value(s) in the table below.
   Fig 1: Identifying Certification ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK 

   FREQUENCY CHART
   
   

   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 

1. Disconnect the D39 ECU connector.
   Fig 2: Identifying D39 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the oscillator connectors.
   Fig 3: Identifying Oscillator Connectors (Front)

   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.

   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 the wiring diagram for connection of each terminal.

   Fig 4: Identifying Oscillator Connectors (Rear)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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