DESCRIPTION
The certification ECU generates a request signal and transmits the signal to the indoor No. 2 electrical key antenna (rear floor). The indoor No. 2 electrical key antenna (rear floor) detects that the electrical key is inside the vehicle and transmits the request signal received from the certification ECU. DTC B27A6 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 (rear floor) (CLG6 - CLG4, CG6B - CLGB).
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B27A6 |
An open circuit is detected in the circuit between the certification ECU and indoor No. 2 electrical key antenna (rear floor) (CLG6 - CLG4, CG6B - CLGB). |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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 (rear floor).
OK:
Connectors are properly connected.
NG |
CONNECT CONNECTORS PROPERLY |
|
2. |
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 |
O9-3 (CLGB) - F79-25 (CG6B) |
Always |
Below 1 Ω |
F79-24 (CLG6) - Body ground |
Always |
10 kΩ or higher |
F79-25 (CG6B) - Body ground |
Always |
10 kΩ or higher |
F79-15 (E) - Body ground |
Always |
Below 1 Ω |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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 |
---|---|---|
F79-24 (CLG6) - F79-15 (E) |
Engine switch off, all doors closed, key not in cabin and lock sensor off → on |
No pulse generation → Pulse generation |
F79-25 (CG6B) - 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 |
|
4. |
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 ).
|
5. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B27A6 is not output.
OK |
END (INDOOR NO. 2 ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE) |
NG |
REPLACE CERTIFICATION ECU |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (VEHICLE NOT INVOLVED IN
COLLISION)
(a) Perform a diagnostic system check (See page
).
(b) With the instrument panel passenger airbag installed on the vehicle, perform ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
The wireless door lock control system troubleshooting procedures are
based on the premise that the power door lock control system is operating
normally. Check the power door lock control system first before troub ...