Room Oscillator does not Recognize Key: Procedure

1. Check that the entry lock and unlock functions operate for each door. Refer to OPERATION CHECK .

NG → See step   19 

OK: Go to next step 

1. Remove the battery of the electrical key transmitter. Refer to OPERATION CHECK .
   Fig 1: Identifying Electrical Key Transmitter And Power Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. With the brake pedal depressed, touch the LEXUS mark of the key to the power switch.
3. When operating the power switch, check whether the hybrid control system starts.

   HINT: 

   • When the key cannot be verified even though it is inside the detection area, the hybrid control system start check can be performed by removing the battery from the key and holding the key against the power switch.
   • If the hybrid control system cannot be started when performing this inspection, the certification ECU (smart key ECU assembly) or ID code box may be malfunctioning.

   OK

   Hybrid control system starts.

   TEXT IN ILLUSTRATION
   
   

   *1	Power Switch
   *2	Electrical Key Transmitter

NG → See step   18 

OK: Go to next step 

1. Install the battery to the electrical key transmitter. Refer to INSTALLATION .
2. Bring the electrical key transmitter near the door control receiver and perform a smart access system with push-button start check. Refer to OPERATION CHECK .

   HINT: 

   As the effect of electric wave interference decreases by moving the key close to the door control receiver, it may be possible to check whether electric wave interference is the cause of the problem.

   RESULT
   
   

   Result	Proceed to
   System cannot be operated	A
   System can be operated	B

   HINT: 

   • If the problem only occurs in specific places or at specific times, electric wave interference may be the cause of the problem. Also, the vehicle may be have the effects of electric wave interference with the parts installed by the dealer. As a result, when parts have been installed by the dealer, it may be necessary to remove those parts before inspecting the vehicle.
   • There may be electric wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
   • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the key detection area) and RF band (used by the key for transmission) to check for locations where there is electric wave interference.

B → AFFECTED BY WAVE INTERFERENCE 

A: Go to next step 

1. Check the following antennas in the key diagnostic mode. Refer to SYSTEM DESCRIPTION .
   1. Check the No. 1 indoor electrical key antenna assembly (front floor).
      Fig 2: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

   2. Check the No. 2 indoor electrical key antenna assembly (rear floor).
      Fig 3: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

   3. Check the No. 3 indoor electrical key antenna assembly (inside luggage).
      Fig 4: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

      HINT: 

      • If the buzzer sounds, it can be determined that the vehicle interior transmitters are operating normally.
      • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage) is operating by the sounding of the buzzer.
      • If the buzzer does not sound for any indoor electrical key antenna assemblies, the certification ECU (smart key ECU assembly) circuit may have a malfunction.

      OK

      Wireless door lock buzzer sounds.

      RESULT
      
      

      Result	Proceed to
      Front operation check fails	A
      Rear operation check fails	B
      Luggage operation check fails	C
      Front, rear and luggage operation checks are normal	D

B → See step   9 

C → See step   13 

D → See step   17 

A: Go to next step 

1. Disconnect the H74 No. 1 indoor electrical key antenna assembly (front floor) connector.
2. Disconnect the H1 certification ECU (smart key ECU assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H74-1 (CLG3) - H1-7 (CLG5)	Always	Below 1 Ω
   H74-3 (CLGB) - H1-8 (CG5B)	Always	Below 1 Ω
   H74-1 (CLG3) or H1-7 (CLG5) - Body ground	Always	10 kΩ or higher
   H74-3 (CLGB) or H1-8 (CG5B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the H74 No. 1 indoor electrical key antenna assembly (front floor) connector.
   Fig 5: Identifying H74 Connector Terminals And Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the H1 certification ECU (smart key ECU assembly) connector.
3. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   H74-1 (CLG3) - H74-3 (CLGB)	Procedure: Power switch off Key not inside vehicle Door is open Door is closed 30 seconds elapse	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveformFig 5)

   TEXT IN ILLUSTRATION
   
   

   *1	Waveform
   *a	Front view of wire harness connector (to No. 1 indoor Electrical Key Antenna [Front Floor])
   *b	Door open
   *c	After approximately 30 seconds from when the door is closed

NG → See step   20 

OK: Go to next step 

1. Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new or normally functioning one. Refer to REMOVAL .

NEXT: Go to next step 

1. Check the following antenna in the key diagnostic mode. Refer to SYSTEM DESCRIPTION .
   1. Check the No. 1 indoor electrical key antenna assembly (front floor).
      Fig 6: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

      OK

      Wireless door lock buzzer sounds.

      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

NG → See step   21 

OK → END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE) 

1. Disconnect the P8 No. 2 indoor electrical key antenna assembly (rear floor) connector.
2. Disconnect the H1 certification ECU (smart key ECU assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P8-1 (CLG4) - H1-24 (CLG6)	Always	Below 1 Ω
   P8-3 (CLGB) - H1-25 (CG6B)	Always	Below 1 Ω
   P8-1 (CLG4) or H1-24 (CLG6) - Body ground	Always	10 kΩ or higher
   P8-3 (CLGB) or H1-25 (CG6B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the P8 No. 2 indoor electrical key antenna assembly (rear floor) connector.
   Fig 7: Identifying P8 Connector Terminals And Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the H1 certification ECU (smart key ECU assembly) connector.
3. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   P8-1 (CLG4) - P8-3 (CLGB)	Procedure: Power switch off Key not inside vehicle Door is open Door is closed 30 seconds elapse	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveformFig 9)

   TEXT IN ILLUSTRATION
   
   

   *1	Waveform
   *a	Front view of wire harness connector (to No. 2 indoor Electrical Key Antenna [Rear Floor])
   *b	Door open
   *c	After approximately 30 seconds from when the door is closed

NG → See step   22 

OK: Go to next step 

1. Temporarily replace the No. 2 indoor electrical key antenna assembly (rear floor) with a new or normally functioning one. Refer to REMOVAL .

NEXT: Go to next step 

1. Check the following antenna in the key diagnostic mode. Refer to SYSTEM DESCRIPTION .
   1. Check the No. 2 indoor electrical key antenna assembly (rear floor).
      Fig 8: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

      OK

      Wireless door lock buzzer sounds.

      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

NG → See step   23 

OK → END (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY WAS DEFECTIVE) 

1. Disconnect the Q12 No. 3 indoor electrical key antenna assembly (inside luggage) connector.
2. Disconnect the H1 certification ECU (smart key ECU assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q12-1 (CLG6) - H1-26 (CLG7)	Always	Below 1 Ω
   Q12-3 (CLGB) - H1-27 (CG7B)	Always	Below 1 Ω
   Q12-1 (CLG6) or H1-26 (CLG7) - Body ground	Always	10 kΩ or higher
   Q12-3 (CLGB) or H1-27 (CG7B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the Q12 No. 3 indoor electrical key antenna assembly (inside luggage) connector.
   Fig 9: Identifying Q12 Connector Terminals And Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the H1 certification ECU (smart key ECU assembly) connector.
3. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   Q12-1 (CLG6) - Q12-3 (CLGB)	Procedure: Power switch off Key not inside vehicle Door is open Door is closed 30 seconds elapse	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveformFig 9)

   TEXT IN ILLUSTRATION
   
   

   *1	Waveform
   *a	Front view of wire harness connector (to No. 3 indoor Electrical Key Antenna [Inside Luggage])
   *b	Door open
   *c	After approximately 30 seconds from when the door is closed

NG → See step   24 

OK: Go to next step 

1. Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage) with a new or normally functioning one. Refer to REMOVAL .

NEXT: Go to next step 

1. Check the following antenna in the key diagnostic mode. Refer to SYSTEM DESCRIPTION .
   1. Check the No. 3 indoor electrical key antenna assembly (inside luggage).
      Fig 10: View Of Inspection Points

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.

      OK

      Wireless door lock buzzer sounds.

      TEXT IN ILLUSTRATION
      
      

      *a	Inspection Point

NG → See step   25 

OK → END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY WAS DEFECTIVE)