Smart Key System (For Entry Function) Room Oscillator Does Not Recognize Key

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SMART KEY SYSTEM (Entry Function)

CHECK SMART KEY SYSTEM (Start Function)

CHECK WAVE ENVIRONMENT

PERFORM KEY DIAGNOSTIC MODE INSPECTION

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)

INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (FRONT FLOOR)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)

INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (REAR FLOOR)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When using the Techstream to troubleshoot with the engine switch off: Connect the Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.

1. Check that entry lock and unlock functions can be operated at each door.
   

   OK:

   Entry lock and unlock functions operate normally.
   

1. Remove the battery of the electrical key transmitter (COROLLA_ZRE142 RM000001P7R02ZX.html).
   

2. With the brake pedal depressed, face the logo side of the key to the engine switch.
   

3. When operating the engine switch, check whether the power source mode changes.
   

   OK:

   Power source mode changes.
   

   HINT:

   1. When the electrical key transmitter cannot be verified even though it is within the specified range, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the engine switch.
      
   2. When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.
      

1. Install the battery to the electrical key transmitter.
   

2. Bring the electrical key transmitter near the indoor electrical key oscillator (front floor), and check that the engine can be started.
   

   NOTICE:

   If the key is brought within 0.2 m (0.656 ft.) of the indoor electrical key oscillator (front floor), communication is not possible.

3. Bring the electrical key transmitter near the indoor electrical key oscillator (rear floor), and check that the engine can be started.
   

   NOTICE:

   If the key is brought within 0.2 m (0.656 ft.) of the indoor electrical key oscillator (rear floor), communication is not possible.

   HINT:

   1. 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.
      
   2. If the operation 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:

   The engine starts.
   

1. Diagnostic mode inspection (indoor electrical key oscillator (front floor))
   

   1. Connect the Techstream to the DLC3.
      

   2. Turn the engine switch on (IG).
      

   3. Turn the Techstream on.
      

   4. Enter the following menus: Body Electrical / Smart Access / Utility / Communication Check (Key Diag Mode) / 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 (rear floor))
   

   1. Connect the Techstream to the DLC3.
      

   2. Turn the engine switch on (IG).
      

   3. Turn the Techstream on.
      

   4. Enter the following menus: Body Electrical / Smart Access / Utility / Communication Check (Key Diag Mode) / 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 indoor electrical key oscillators are operating normally.

      Result:

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

1. Disconnect the certification ECU (smart key ECU assembly) connector.
   

2. Disconnect the indoor electrical key oscillator (front floor) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E36-11 (CLG5) - E37-1 (CLG3)	Always	Below 1 Ω
   E36-12 (CG5B) - E37-3 (CLGB)	Always	Below 1 Ω
   E36-11 (CLG5) - Body ground	Always	10 kΩ or higher
   E36-12 (CG5B) - Body ground	Always	10 kΩ or higher

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

   
   
   
   

   Standard:

   Tester Connection	Tool Setting	Switch Condition	Specified Condition
   E36-11 (CLG5) - E36-12 (CG5B)	2 V/DIV, 2 μs/DIV. (Reference)	Engine switch on (IG)	Pulse generation

1. Disconnect the certification ECU (smart key ECU assembly) connector.
   

2. Disconnect the indoor electrical key oscillator (rear floor) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E36-13 (CLG6) - L25-1 (CLG4)	Always	Below 1 Ω
   E36-14 (CG6B) - L25-3 (CLGB)	Always	Below 1 Ω
   E36-13 (CLG6) - Body ground	Always	10 kΩ or higher
   E36-14 (CG6B) - Body ground	Always	10 kΩ or higher

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

   
   
   
   

   Standard:

   Tester Connection	Tool Setting	Switch Condition	Specified Condition
   E36-13 (CLG6) - E36-14 (CG6B)	2 V/DIV, 2 μs/DIV. (Reference)	Engine switch on (IG)	Pulse generation