Room Oscillator Does Not Recognize Key

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): Room Oscillator does not Recognize Key
- Room Oscillator does not Recognize Key

DESCRIPTION

If the room oscillator does not recognize a key, one of the following may be the cause: 1) communication between the indoor electrical key oscillator (for front floor) and key cannot be performed; 2) communication between the indoor electrical key oscillator (for center floor) and key cannot be performed; or 3) communication between the indoor electrical key oscillator (for rear floor) and key cannot be performed.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* The smart key system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting How To Proceed With Troubleshooting. Troubleshoot the smart key system (for entry function) after confirming that the communication system is functioning properly.
* When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
PROCEDURE

1. CHECK SMART KEY SYSTEM (for Start Function)

(a) Remove the battery of the key Transmitter Battery (w/ Smart Key System).

(b) With the brake pedal depressed, touch the engine switch while facing the logo side of the key to the engine switch.

(c) When operating the engine switch, check whether the power source mode changes.

OK:

Power source mode changes.

HINT
* When the key 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 key and holding the transmitter close to the engine switch.
* When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.
NG -- GO TO SMART KEY SYSTEM (for Start Function) (Proceed to How to Proceed with Troubleshooting)
OK -- Continue to next step.

2. CHECK WAVE ENVIRONMENT

(a) Install the battery to the key Transmitter Battery (w/ Smart Key System).

(b) Bring the key near the indoor electrical key oscillator (for 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 (for front floor), communication is not possible.

(c) Bring the key near the indoor electrical key oscillator (for center 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 (for center floor), communication is not possible.

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

*: If the customize setting for Ignition Available Area is not set ALL, the engine will not start. Before performing this inspection, check that ALL has been selected Smart Key System (for Entry Function).

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

HINT
* When the key 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 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.

NG -- PERFORM KEY DIAGNOSTIC MODE INSPECTION

OK -- AFFECTED BY WAVE INTERFERENCE

3. PERFORM KEY DIAGNOSTIC MODE INSPECTION

(a) Diagnostic mode inspection (indoor electrical key oscillator (for 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 Key / Key Communication Check / Overhead + Front Room.

(5) When the key is placed on the driver seat or front passenger seat cushion, check that the wireless door lock buzzer sounds.

(b) Diagnostic mode inspection (indoor electrical key oscillator (for center 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 Key / Key Communication Check / Overhead + Rear Room.

(5) When the key is placed on the rear seat cushion, check that the wireless door lock buzzer sounds.

(c) Diagnostic mode inspection (indoor electrical key oscillator (for 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 Key / Key Communication Check / Overhead + Back Door (inside).

(5) When the key is held at the same height as the rear bumper upper surface and aligned with the center of the rear of the vehicle, 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:

E -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

D -- CHECK TRANSMITTER BATTERY

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

B -- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)
A -- Continue to next step.

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

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

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

Text in Illustration:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor (INPUT))

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

(b) Check for pulses according to the value(s) in the table below.

Standard:

Text in Illustration:

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- Continue to next step.

6. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor)

(a) Replace the indoor electrical key oscillator (for front floor Removal.

NEXT -- Continue to next step.

7. CHECK SMART KEY SYSTEM (ENTRY IGNITION FUNCTION (for Front Floor))

(a) Inspect the detection area for the entry ignition function (for front floor). Make sure that the direction of the key is as shown in the illustration. When the key is in either of the 2 inspection points shown in the illustration, check that the engine can start.

OK:

Engine starts normally.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK -- END (INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

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

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

(b) Disconnect the indoor electrical key oscillator (for center floor) connector.

Text in Illustration:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

9. INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (for Center Floor (INPUT))

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

(b) Check for pulses according to the value(s) in the table below.

Standard:

Text in Illustration:

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- Continue to next step.

10. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Center Floor)

(a) Replace the indoor electrical key oscillator (for center floor) Removal.

NEXT -- Continue to next step.

11. CHECK SMART KEY SYSTEM (ENTRY IGNITION FUNCTION (for Center Floor))

(a) Inspect the detection area for the entry ignition function (for center floor). Make sure that the direction of the key is as shown in the illustration. When the key is in either of the 2 inspection points shown in the illustration, check that the engine can start.

OK:

Engine starts normally.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK -- END (INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

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

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

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

Text in Illustration:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

13. INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor (INPUT))

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

(b) Check for pulses according to the value(s) in the table below.

Standard:

Text in Illustration:

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- Continue to next step.

14. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor)

(a) Replace the indoor electrical key oscillator (fro rear floor) Removal.

NEXT -- Continue to next step.

15. CHECK SMART KEY SYSTEM (ENTRY IGNITION FUNCTION (for Rear Floor))

(a) Inspect the detection area for the entry ignition function (for rear floor). Make sure that the direction of the key is as shown in the illustration. When the key is in either of the 2 inspection points shown in the illustration, check that the engine can start.

OK:

Engine starts normally.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK -- END (INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

16. CHECK TRANSMITTER BATTERY

(a) Remove the battery from the key that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative (-) terminal Transmitter Battery (w/ Smart Key System).

NOTICE:
Do not wrap a lead wire around the terminal, wedge it between the terminals, or solder it. Terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

(b) Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

(c) Using an oscilloscope, check the transmitter battery voltage waveform.

HINT
When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the key within the entry operating range to perform the measurement. For the entry operating range, refer to System Description Smart Key System (for Entry Function).

Standard Voltage:

NG -- REPLACE TRANSMITTER BATTERY
OK -- Continue to next step.

17. CHECK ELECTRICAL KEY TRANSMITTER

(a) Check if another registered key is available.

Result:

B -- CHECK ELECTRICAL KEY TRANSMITTER (OPERATION)
A -- Continue to next step.

18. REGISTER ELECTRICAL KEY TRANSMITTER

(a) Register a new key Engine Immobiliser System (W/ Smart Key System).

NEXT -- Continue to next step.

19. CHECK ELECTRICAL KEY TRANSMITTER (OPERATION)

(a) Using the key registered in the previous step or another registered key, check that the engine starts normally.

OK:

Engine starts normally.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK -- REPLACE ELECTRICAL KEY TRANSMITTER (REPLACE MALFUNCTIONING KEY)

20. REPLACE ELECTRICAL KEY TRANSMITTER (REPLACE MALFUNCTIONING KEY)

21. GO TO SMART KEY SYSTEM (for Start Function) (Proceed to How to Proceed with Troubleshooting) How To Proceed With Troubleshooting

22. AFFECTED BY WAVE INTERFERENCE

23. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

24. REPAIR OR REPLACE HARNESS OR CONNECTOR

25. END (INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

26. REPLACE TRANSMITTER BATTERY Removal