Toyota 4Runner manuals

Toyota 4Runner: 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


CAUTION / NOTICE / HINT

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 (See page ). 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) (See page
    ).

PROCEDURE

1.

CHECK SMART KEY SYSTEM (START FUNCTION)

(a) Remove the battery of the electrical key transmitter (See page ).



(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.

Text in Illustration

*1

Engine Switch

*2

Electrical Key Transmitter


NG

GO TO SMART KEY SYSTEM (FOR START FUNCTION)


OK

2.

CHECK WAVE ENVIRONMENT

(a) Install the battery to the electrical key transmitter (See page ).


(b) Move the electrical key transmitter as described below and perform the operation inspection (See page ).


(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.


OK

AFFECTED BY WAVE INTERFERENCE


NG

3.

CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE

(a) Check the following antennas in the key diagnostic mode (See page ).


(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.

Result

Result

Proceed to

Front operation check fails

A

Rear operation check fails

B

Luggage operation check fails

C

Front, rear and luggage operation checks are normal

D


B

GO TO STEP 8


C

GO TO STEP 12


D

REPLACE CERTIFICATION ECU


A

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:

Tester Connection

Condition

Specified Condition

F77-1 (CLG3) - F79-7 (CLG5)

Always

Below 1 Ω

F77-3 (CLGB) - F79-8 (CG5B)

Always

Below 1 Ω

F77-1 (CLG3) - Body ground

Always

10 kΩ or higher

F77-3 (CLGB) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

CHECK CERTIFICATION ECU

(a) Disconnect the F77 antenna connector.


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

OK:

Tester Connection

Switch Condition

Specified Condition

F77-1 (CLG3) - F77-3 (CLGB)

Engine switch off, all doors closed, key not in cabin and lock sensor off → on

No pulse generation → pulse generation

Text in Illustration

*a

Front view of wire harness connector

(to Indoor No. 1 Electrical Key Antenna [Front Floor])


NG

REPLACE CERTIFICATION ECU


OK

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 (See page ).



NEXT

7.

CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE

(a) Check the following antenna in the key diagnostic mode (See page ).


(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.


OK

END (INDOOR NO. 1 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)


NG

REPLACE CERTIFICATION ECU

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:

Tester Connection

Condition

Specified Condition

O9-1 (CLG4) - F79-24 (CLG6)

Always

Below 1 Ω

O9-2 (CLGB) - F79-25 (CG6B)

Always

Below 1 Ω

O9-1 (CLG4) - Body ground

Always

10 kΩ or higher

O9-2 (CLGB) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

9.

CHECK CERTIFICATION ECU

(a) Disconnect the O9 antenna connector.


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

OK:

Tester Connection

Switch Condition

Specified Condition

O9-1 (CLG4) - O9-2 (CLGB)

Engine switch off, all doors closed, key not in cabin and lock sensor off → on

No pulse generation → pulse generation

Text in Illustration

*a

Front view of wire harness connector

(to Indoor No. 2 Electrical Key Antenna [Rear Floor])


NG

REPLACE CERTIFICATION ECU


OK

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 (See page ).



NEXT

11.

CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE

(a) Check the following antenna in the key diagnostic mode (See page ).


(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.


OK

END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)


NG

REPLACE CERTIFICATION ECU

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:

Tester Connection

Condition

Specified Condition

O14-1 (CLG6) - F79-26 (CLG7)

Always

Below 1 Ω

O14-2 (CLGB) - F79-27 (CG7B)

Always

Below 1 Ω

O14-1 (CLG6) - Body ground

Always

10 kΩ or higher

O14-2 (CLGB) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

13.

CHECK CERTIFICATION ECU

(a) Disconnect the O14 antenna connector.


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

OK:

Tester Connection

Switch Condition

Specified Condition

O14-1 (CLG6) - O14-2 (CLGB)

Engine switch off, all doors closed, key not in cabin and lock sensor off → on

No pulse generation → pulse generation

Text in Illustration

*a

Front view of wire harness connector

(to Indoor No. 2 Electrical Key Antenna [Inside Luggage])


NG

REPLACE CERTIFICATION ECU


OK

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 (See page ).



NEXT

15.

CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE

(a) Check the following antenna in the key diagnostic mode (See page ).


(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.


OK

END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)


NG

REPLACE CERTIFICATION ECU

Entry Interior Alarm does not Sound
DESCRIPTION The smart key system uses the combination meter buzzer to perform various vehicle interior warnings. When the conditions of each warning are met, the certification ECU sends a buzzer ...

Back Door Entry Lock and Unlock Functions do not Operate
DESCRIPTION When the back door entry lock and unlock functions do not operate, one of the following may be malfunctioning: 1) the power door lock control system, 2) the electrical key antenna (ou ...

Other materials about Toyota 4Runner:

Relay(for Windshield Deicer)
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE DEICER RELAY (DEICER) (a) Remove the deicer relay from the engine room relay block. Text in Illustration *1 Deicer Relay ...

Removal
REMOVAL PROCEDURE 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTICE: When disconnecting the cable, some systems ne ...

© 2016-2020 | www.to4runner.net

0.006