Inspection Procedure

PERFORM ACTIVE TEST USING HAND-HELD TESTER (CERTIFICATION ECU - OUTPUT SIGNAL)

Connect the hand-held tester to the DLC3.
Turn the engine switch on (IG).

Following the display on the tester, select the "ACTIVE TEST".

Certification ECU:

CERTIFICATION ECU ACTIVE TEST

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

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

Standard:

CERTIFICATION ECU FREQUENCY

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)

Fig 1: Identifying Terminals Of Certification ECU Connector

G02977182

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE CERTIFICATION ECU (SEE REPLACEMENT )
OK : Go to next step.

CHECK WIRE HARNESS (CERTIFICATION ECU - CABIN OSCILLATOR)
1. Disconnect the D39 ECU connector.
2. Disconnect the oscillator connectors.
3. Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.
  Standard: Below 1 Ω
4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.
  Standard: 10 kΩ or higher
  
  HINT:
  
  Refer to the wiring diagram for connection of each terminal.
  
  Fig 2: Disconnecting D39 ECU Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Disconnecting Oscillator D26 Connector (Front)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Disconnecting Oscillator Connector (Rear)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE