Inspection Procedure

1. Connect the intelligent tester to the DLC3.
   Fig 1: Connecting Intelligent Tester To DLC3

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2. Turn the engine switch on (IG).
3. Following the display on the tester, select the "ACTIVE TEST".

   Certification ECU 

   ITEM REFERENCE CHART
   
   

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

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

   OK 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   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: Disconnecting D39 ECU Connector

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2. Disconnect the oscillator connectors.
   Fig 3: Disconnecting Oscillator Connectors

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3. Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.
   Fig 4: Disconnecting Oscillator Connectors (Rear)

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   Resistance: 

   Below 1  

4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.

   Resistance: 

   10 k or higher 

   HINT:

   Refer to the WIRING DIAGRAM  for connection of each terminal.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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