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 the electrical key is brought close to the vehicle, and when a request signal is received from within 1.0 m (3.28 ft.) of the back door, the signal is transmitted. DTC B27A8 is stored by the certification ECU when an open circuit is detected in the circuit between the certification ECU and electrical key antenna (outside luggage) (CLG8 - CLG5, CG8B - CLGB).
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B27A8 |
An open circuit is detected in the circuit between the certification ECU and electrical key antenna (outside luggage) (CLG8 - CLG5, CG8B - 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 electrical key antenna (outside luggage).
OK:
Connectors are properly connected.
NG | ![]() |
CONNECT CONNECTORS PROPERLY |
|
2. |
CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY ANTENNA - CERTIFICATION ECU) |
(a) Disconnect the N21 antenna connector.
(b) Disconnect the F78 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
N21-1 (CLG5) - F78-19 (CLG8) |
Always |
Below 1 Ω |
N21-2 (CLGB) - F78-20 (CG8B) |
Always |
Below 1 Ω |
F78-19 (CLG8) - Body ground |
Always |
10 kΩ or higher |
F78-20 (CG8B) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) |
(a) Remove the outside electrical key antenna (outside luggage) (See page
).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1 (CLG5) - 2 (CLGB) |
Always |
Below 1 Ω |
NG | ![]() |
REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) |
|
4. |
REPLACE CERTIFICATION ECU |
(a) Temporarily replace the certification ECU with a new one (See page
).
|
5. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B27A8 is not output.
OK | ![]() |
END (CERTIFICATION ECU IS DEFECTIVE) |
NG | ![]() |
REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) |
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
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 any parts. This non-intrusive
inspection can be very useful because in ...
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