Room Oscillator Does Not Recognize Key

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (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, either of the following may be the cause: 1) communication between the indoor electrical key oscillator (for front floor) and key cannot be performed; or 2) communication between the indoor electrical key oscillator (for rear floor) and key cannot be performed.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* The smart access system with push-button start (for entry function) uses a LIN communication system and BEAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting How To Proceed With Troubleshooting. Troubleshoot the smart access system with push-button start (for entry function) after confirming that the communication system is functioning properly.
* When using the Techstream to troubleshoot: Connect the Techstream to the vehicle while the engine switch is off, 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 ACCESS SYSTEM WITH PUSH-BUTTON START (ENTRY FUNCTION)

(a) Check that entry lock and unlock functions can be operated at each door Operation Check.

OK:

Entry lock and unlock functions operate normally.

NG -- GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table for Each Door) Problem Symptoms Table
OK -- Continue to next step.

2. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (START FUNCTION)

(a) Remove the battery of the key Removal.

(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 ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) (Proceed to Power Source Mode does not Change)
OK -- Continue to next step.

3. CHECK WAVE ENVIRONMENT

(a) Install the battery to the key Installation.

(b) Bring the key near the indoor electrical key oscillator (for front floor), and perform an engine start check.

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 rear floor), and perform an engine start check*.

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
* *: If the customize setting for Ignition Available Area is not set All, the hybrid vehicle control system will not start. Before performing this inspection, check that All has been selected Smart Access System With Push-Button Start (for Entry Function).
* 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 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:

The engine starts.

NG -- PERFORM KEY DIAGNOSTIC MODE INSPECTION

OK -- AFFECTED BY WAVE INTERFERENCE

4. 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 Access / Utility / Communication Check (Key Diag Mode) / 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.

HINT
Place the key on the driver or front passenger seat cushion.

(b) 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 Access / Utility / Communication Check (Key Diag Mode) / Overhead + Rear Room.

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

HINT
* Place the key on the rear seat cushion.
* If the buzzer sounds, it can be determined that the indoor electrical key oscillators are operating normally.

Result:

C -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

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

5. 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.

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

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

Standard Voltage:

Text in Illustration

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

OK -- REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor)

7. 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.

8. INSPECT INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor)

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

Standard Voltage:

Text in Illustration

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

OK -- REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor)