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). |
|
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 (inside luggage).
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 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 |
|
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 |
|
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
).
|
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 |
Disassembly
DISASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 second ...
Relay
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. REMOVE HEADLIGHT RELAY
(a) Remove the headlight relay from the engine room relay box.
2. INSPECT HEADLIGHT RELAY
(a) Measure the re ...