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 the key, one of the following may be the cause: 1) communication between the indoor No. 1 electrical key antenna (front floor) and electrical key transmitter cannot be performed; 2) communication between the indoor No. 2 electrical key antenna (rear floor) and electrical key transmitter cannot be performed; or 3) communication between the indoor No. 2 electrical key antenna (inside luggage) and electrical key transmitter cannot be performed.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* The smart key system (for Entry Function) uses a multiplex communication system (LIN communication system) and the 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 systems are functioning properly.
* When using the Techstream with the engine switch off to troubleshoot: 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.
* Before replacing the certification ECU, refer to the engine immobiliser system (w/ Smart Key System) Engine Immobiliser System (W/ Smart Key System).
PROCEDURE
1. CHECK SMART KEY SYSTEM (START FUNCTION)
(a) Remove the battery of the electrical key transmitter Transmitter Battery (w/ Smart Key System).
(b) With the brake pedal depressed, touch the TOYOTA mark of the key to the engine switch.
(c) When operating the engine switch, check whether the power source mode changes.
HINT
* When the electrical key transmitter cannot be verified even though it is in the operating range of the start function, 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.
* When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.
OK:
Power source mode changes.
NG -- GO TO SMART KEY SYSTEM (FOR START FUNCTION)
OK -- Continue to next step.
2. CHECK WAVE ENVIRONMENT
(a) Install the battery to the electrical key transmitter Transmitter Battery (w/ Smart Key System).
(b) Move the electrical key transmitter as described below and perform the operation inspection Operation Check.
(1) Bring the electrical key transmitter near the indoor No. 1 electrical key antenna (front floor) and perform an engine control system start check.
NOTICE:
If the key is brought within 0.2 m (0.656 ft.) of the indoor No. 1 electrical key antenna (front floor), communication is not possible.
(2) Bring the electrical key transmitter near the indoor No. 2 electrical key antenna (rear floor) and perform an engine control system start check.
NOTICE:
If the key is brought within 0.2 m (0.656 ft.) of the indoor No. 2 electrical key antenna (rear floor), communication is not possible.
(3) Bring the electrical key transmitter near the indoor No. 2 electrical key antenna (inside luggage) and perform an engine control system start check.
NOTICE:
If the key is brought within 0.2 m (0.656 ft.) of the indoor No. 2 electrical key antenna (rear floor), communication is not possible.
HINT
* When the electrical key transmitter is brought near the indoor electrical key antenna, 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:
Engine can be started.
NG -- CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE
OK -- AFFECTED BY WAVE INTERFERENCE
3. CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE
(a) Check the following antennas in the key diagnostic mode Smart Key System (for Entry Function).
(1) Check the indoor No. 1 electrical key antenna (front floor).
When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.
(2) Check the indoor No. 2 electrical key antenna (rear floor).
When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.
(3) Check the indoor No. 2 electrical key antenna (inside luggage).
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 (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 antennas, the certification ECU circuit may have a malfunction.
OK:
Wireless door lock buzzer sounds.
D -- REPLACE CERTIFICATION ECU
C -- CHECK HARNESS AND CONNECTOR (INDOOR NO. 2 ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
B -- CHECK HARNESS AND CONNECTOR (INDOOR NO. 2 ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
A -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (INDOOR NO. 1 ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
(a) Disconnect the F77 antenna connector.
(b) Disconnect the F79 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK CERTIFICATION ECU
(a) Disconnect the F77 antenna connector.
(b) Measure the voltage according to the value(s) in the table below.
OK:
NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.
6. REPLACE INDOOR NO. 1 ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)
(a) Temporarily replace the indoor No. 1 electrical key antenna (front floor) with a new or normally functioning one Removal.
NEXT -- Continue to next step.
7. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE
(a) Check the following antenna in the key diagnostic mode Smart Key System (for Entry Function).
(1) Check the indoor No. 1 electrical key antenna (front floor).
When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.
OK:
Wireless door lock buzzer sounds.
NG -- REPLACE CERTIFICATION ECU
OK -- END (INDOOR NO. 1 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)
8. CHECK HARNESS AND CONNECTOR (INDOOR NO. 2 ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
(a) Disconnect the O9 antenna connector.
(b) Disconnect the F79 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK CERTIFICATION ECU
(a) Disconnect the O9 antenna connector.
(b) Measure the voltage according to the value(s) in the table below.
OK:
NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.
10. REPLACE INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)
(a) Temporarily replace the indoor No. 2 electrical key antenna (rear floor) with a new or normally functioning one Removal.
NEXT -- Continue to next step.
11. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE
(a) Check the following antenna in the key diagnostic mode Smart Key System (for Entry Function).
(1) Check the indoor No. 2 electrical key antenna (rear floor).
When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.
OK:
Wireless door lock buzzer sounds.
NG -- REPLACE CERTIFICATION ECU
OK -- END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)
12. CHECK HARNESS AND CONNECTOR (INDOOR NO. 2 ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
(a) Disconnect the O14 antenna connector.
(b) Disconnect the F79 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
13. CHECK CERTIFICATION ECU
(a) Disconnect the O14 antenna connector.
(b) Measure the voltage according to the value(s) in the table below.
OK:
NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.
14. REPLACE INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)
(a) Temporarily replace the indoor No. 2 electrical key antenna (inside luggage) with a new or normally functioning one Removal.
NEXT -- Continue to next step.
15. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE
(a) Check the following antenna in the key diagnostic mode Smart Key System (for Entry Function).
(1) Check the indoor No. 2 electrical key antenna (inside luggage).
When the electrical key transmitter is at the inspection point, check that the wireless door lock buzzer sounds.
OK:
Wireless door lock buzzer sounds.
NG -- REPLACE CERTIFICATION ECU
OK -- END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)
16. GO TO SMART KEY SYSTEM (FOR START FUNCTION)
17. AFFECTED BY WAVE INTERFERENCE
18. REPLACE CERTIFICATION ECU Removal
19. REPAIR OR REPLACE HARNESS OR CONNECTOR
20. END (INDOOR NO. 1 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)
21. END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)
22. END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)