Room Oscillator does not Recognize Key: Procedure

1. Check that entry lock and unlock function can be operated at each door. Refer to OPERATION CHECK .

NG → See step   9 

OK: Go to next step 

1. Remove the battery of the electrical key transmitter. Refer to REMOVAL .
   Fig 1: Identifying Electrical Key Transmitter

   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 power source mode changes.

   OK

   Power source mode changes.

   HINT: 

   • When the electrical key transmitter cannot be verified even though it is in the start operating range, the hybrid control system start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the power switch.
   • When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.

NG → See step   10 

OK: Go to next step 

1. Install the battery to the electrical key transmitter. Refer to REMOVAL .
2. Bring the electrical key transmitter near the indoor electrical key oscillator (in center console), and perform a hybrid control system start check.
   NOTE:

   If the key is brought within 0.2 m (0.656 ft.) of the center console, communication is not possible.

3. Bring the electrical key transmitter near the indoor electrical key oscillator (in rear seat cushion), and perform a hybrid control system start check.
   NOTE:

   If the key is brought within 0.2 m (0.656 ft.) of the rear seat cushion, communication is not possible.

   HINT: 

   • When the electrical key transmitter is brought near the indoor electrical key oscillator, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
   • If the inspection result is that the operation check is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference, If installed, remove them and perform the operation check.

   OK

   Hybrid control system starts.

NG → See step   4 

OK → AFFECTED BY WAVE INTERFERENCE 

1. Diagnostic mode inspection indoor electrical key oscillator (for Front Floor)
   Fig 2: Identifying Ignition Operation's Detection Area (Front Seat)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect the Techstream to the DLC3.
   2. Turn the power switch ON (IG).
   3. Turn the Techstream on.
   4. Enter the following menus: Body Electrical / Smart Access / Smart Communication Check /Overhead + Front Room.
   5. When the electrical key transmitter is placed on the driver seat or front passenger seat cushion, check that the wireless door lock buzzer sounds.
2. Diagnostic mode inspection indoor electrical key oscillator (for Rear Floor)
   Fig 3: Identifying Ignition Operation's Detection Area (Rear Seat)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect the Techstream to the DLC3.
   2. Turn the power switch ON (IG).
   3. Turn the Techstream on.
   4. Enter the following menus: Body Electrical / Smart Access / Smart Communication Check /Overhead + Rear Room.
   5. When the electrical key transmitter is placed on the rear seat cushion, 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 oscillator (front or rear) is operating by sounding the buzzer.
      • If the buzzer does not sound for both indoor electrical key oscillators, the certification ECU circuit may have a malfunction.
      RESULT
      
      

      Result	Proceed to
      Rear operation check is normal	A
      Front operation check is normal	B
      Front and rear operation check is normal or fail	C

C → See step   11 

B → See step   7 

A: Go to next step 

Fig 4: Identifying L74 Oscillator Connector Terminals And L15 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L15 ECU connector.
2. Disconnect the L74 oscillator connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L74-1 (CLG3) - L15-11 (CLG5)	Always	Below 1 Ω
   L74-3 (CLGB) - L15-12 (CG5B)	Always	Below 1 Ω
   L74-1 (CLG3) - Body ground	Always	10 kΩ or higher
   L74-3 (CLGB) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 5: Checking Indoor Electrical Key Oscillator Component

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard voltage

   Tester Connection	Tool Setting	Condition	Specified Condition
   L15-11 (CLG5) - L15-12 (CG5B)	2 V/DIV, 2μs/DIV. (Reference)	Power switch ON (IG)	Pulse generation

NG → See step   13 

OK → See step   12 

Fig 6: Identifying L15 ECU Connector Terminals And S10 Oscillator Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L15 ECU connector.
2. Disconnect the S10 oscillator connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S10-1 (CLG4) - L15-13 (CLG6)	Always	Below 1 Ω
   S10-3 (CLGB) - L15-14 (CG6B)	Always	Below 1 Ω
   S10-1 (CLG4) - Body ground	Always	10 kΩ or higher
   S10-3 (CLGB) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 7: Identifying Certification ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard voltage

   Tester Connection	Tool Setting	Condition	Specified Condition
   L15-13 (CLG6) - L15-14 (CG6B)	2 V/DIV., 2 μs/DIV. (Reference)	Power switch ON (IG)	Pulse generation

NG → See step   13 

OK → See step   14