Toyota 4Runner manuals

Toyota 4Runner: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit (B27A7)

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Open in Inside Luggage Compartment Electrical Key Oscillator Circuit (B27A7)

DESCRIPTION

The certification ECU generates a request signal and transmits the signal to the indoor No. 2 electrical key antenna (inside luggage). The indoor No. 2 electrical key antenna (inside luggage) detects that the electrical key is inside the vehicle and transmits the request signal received from the certification ECU. DTC B27A7 is stored by the certification ECU when an open circuit is detected in the circuit between the certification ECU and indoor No. 2 electrical key antenna (inside luggage) (CLG7 - CLG6, CG7B - CLGB).

DTC Code

DTC Detection Condition

Trouble Area

B27A7

An open circuit is detected in the circuit between the certification ECU and indoor No. 2 electrical key antenna (inside luggage) (CLG7 - CLG6, CG7B - CLGB).

  • Harness or connector
  • Indoor No. 2 electrical key antenna (inside luggage)
  • Certification ECU

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 DLC3 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 CONNECTOR CONNECTION

(a) Turn the engine switch off.

(b) Check that the connectors are properly connected to the certification ECU and indoor No. 2 electrical key antenna (inside luggage).

OK:

Connectors are properly connected.


NG

CONNECT CONNECTORS PROPERLY

OK

2.

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

O14-3 (CLGB) - F79-27 (CG7B)

Always

Below 1 Ω

F79-26 (CLG7) - Body ground

Always

10 kΩ or higher

F79-27 (CG7B) - Body ground

Always

10 kΩ or higher

F79-15 (E) - Body ground

Always

Below 1 Ω


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK CERTIFICATION ECU

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

Text in Illustration

*a

Component with harness connected

(Certification ECU)

-

-

OK:

Tester Connection

Switch Condition

Specified Condition

F79-26 (CLG7) - F79-15 (E)

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

No pulse generation → Pulse generation

F79-27 (CG7B) - F79-15 (E)

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

No pulse generation → Pulse generation


NG

REPLACE CERTIFICATION ECU

OK

4.

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

5.

CHECK FOR DTC

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


OK:

DTC B27A7 is not output.


OK

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


NG

REPLACE CERTIFICATION ECU

Data List / Active Test
DATA LIST / ACTIVE TEST 1. READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing ...

Open in Outside Luggage Compartment Electrical Key Antenna Circuit (B27A8)
DESCRIPTION The certification ECU generates a request signal and transmits the signal to the electrical key antenna (outside luggage). The electrical key antenna (outside luggage) detects that th ...

Other materials about Toyota 4Runner:

Installation
INSTALLATION PROCEDURE 1. INSTALL REAR DIFFERENTIAL CARRIER ASSEMBLY (a) Remove any dust and oil from the differential carrier assembly and the contact surfaces of the axle housing. (b) Install a new gasket and the differential carrier assembly with the ...

Installation
INSTALLATION PROCEDURE 1. INSTALL WIRELESS DOOR LOCK BUZZER (a) Connect the connector. (b) Attach the clamp to install the wireless door lock buzzer. 2. INSTALL FRONT FENDER LINER LH (w/ Intuitive Parking Assist System) (a) Install the front fender liner ...

© 2016-2020 | www.to4runner.net

0.0061