DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the No. 1 indoor electrical key antenna assembly (front floor). For the No. 1 indoor electrical key antenna assembly (front floor) to detect when the electrical key transmitter sub-assembly is inside the vehicle, the signal from the certification ECU (smart key ECU assembly) requesting a response from the electrical key transmitter sub-assembly is transmitted inside the vehicle. DTC B27A5 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (front floor) (between terminals CLG5 and CLG, or terminals CG5B and CLGB).
DTC Code |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B27A5 |
An open circuit is detected in the circuit between the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (front floor) (CLG5 - CLG, CG5B - CLGB) (1 trip detection logic*). |
|
Any time |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
When electrical key transmitter sub-assembly is in front seat area:
|
- |
DTC Code |
Data List and Active Test |
---|---|
B27A5 |
Key diagnostic mode can be used to perform troubleshooting |
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 (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (front floor).
OK:
Connectors are properly connected.
NG |
CONNECT CONNECTORS PROPERLY |
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INDOORELECTRICAL KEY ANTENNA ASSEMBLY) |
(a) Disconnect the C29 certification ECU (smart key ECU assembly) connectors.
(b) Disconnect the N29 No. 1 indoor electrical key antenna assembly (front floor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C29-21 (CLG5) - N29-1 (CLG) |
Always |
Below 1 Ω |
C29-20 (CG5B) - N29-3 (CLGB) |
Always |
Below 1 Ω |
C29-11 (E) - Body ground |
Always |
Below 1 Ω |
C29-21 (CLG5) or N29-1 (CLG) - Body ground |
Always |
10 kΩ or higher |
C29-20 (CG5B) or N29-3 (CLGB) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOORELECTRICAL KEY ANTENNA ASSEMBLY) |
(a) Connect the C29 certification ECU (smart key ECU assembly) connectors.
Text in Illustration
*a |
Component with harness connected (Certification ECU (smart key ECU assembly)) |
*b |
Waveform 1 |
*c |
For 30 seconds after closing any door using the door outside handle |
*d |
30 seconds or more have elapsed after closing any door using the door outside handle |
(b) Connect the N29 No. 1 indoor electrical key antenna assembly (front floor) connector.
(c) Using an oscilloscope, check the waveform.
OK:
Tester Connection |
Switch Condition |
Tool Setting |
Specified Condition |
---|---|---|---|
C29-21 (CLG5) - C29-11 (E) |
Procedure:
|
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 1) |
C29-20 (CG5B) - C29-11 (E) |
Procedure:
|
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 1) |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
4. |
REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) |
(a) Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new or known good one (See page ).
|
5. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
6. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B27A5 is not output.
OK |
END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) WAS DEFECTIVE) |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Illumination Circuit
DESCRIPTION
Power is supplied to the radio and display receiver assembly and steering pad
switch assembly illumination when the light control switch is in the TAIL or HEAD
position.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
The vehicle is equipped with a Supplemental Restrain ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Blind Spot Monitor System
DTC Code
Detection Item
See page
C1A45
Vehicle Speed Sensor
C1A47
Steering Angle Sensor
C1AB0
Short ...