DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and sends it to the outside electrical key oscillator (for rear side). To detect the key near the driver door, the outside electrical key oscillator (for rear side) creates a detection area towards the area approximately 1.0 m (3.28 ft.) from the back door.
DTC B27A8 is detected by the certification ECU (smart key ECU assembly) when an open circuit occurs between the certification ECU (smart key ECU assembly) and outside electrical key oscillator (for rear side) terminals (between CLG8 and CLG5, or CG8B and CLGB).
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B27A8 |
Open circuit detected between the certification ECU (smart key ECU assembly and outside electrical key oscillator (for rear side) terminals (between CLG8 and CLG5, or CG8B and CLGB). |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
The smart key system (for entry function) uses a multiplex communication system
(LIN communication system) and 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 system is functioning properly.
PROCEDURE
1. |
CHECK CONNECTOR CONNECTION CONDITION |
(a) Turn the engine switch off.
(b) Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and the outside electrical key oscillator (for rear side).
OK:
Connectors are properly connected.
NG |
CONNECT CONNECTORS PROPERLY |
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - OUTSIDE ELECTRICAL KEY OSCILLATOR) |
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Disconnect the outside electrical key oscillator (for rear side) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D26-19 (CLG8) - L17-1 (CLG5) |
Always |
Below 1 Ω |
D26-20 (CG8B) - L17-2 (CLGB) |
Always |
Below 1 Ω |
D26-19 (CLG8) - Body ground |
Always |
10 kΩ or higher |
D26-20 (CG8B) - Body ground |
Always |
10 kΩ or higher |
L17-1 (CLG5) - Body ground |
Always |
10 kΩ or higher |
L17-2 (CLGB) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) |
*2 |
Front view of wire harness connector (to Outside Electrical Key Oscillator (for Rear Side)) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT OUTSIDE ELECTRICAL KEY OSCILLATOR |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG |
REPLACE OUTSIDE ELECTRICAL KEY OSCILLATOR |
|
4. |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Replace the certification ECU (smart key ECU assembly) (See page ).
|
5. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs.
OK:
DTC B27A8 is not output.
OK |
END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) |
NG |
REPLACE OUTSIDE ELECTRICAL KEY OSCILLATOR |
Data List / Active Test
DATA LIST / ACTIVE TEST
1. 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 any parts. This non-intrusive
inspection can be very useful bec ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT GARAGE DOOR OPENER
(a) To inspect the garage door opener system, press each switch and check
that the LED in the "HomeLink" logo illuminates as illustrated. If one or
more of the switch ...
Outer Mirror Control Ecu
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG
2. REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WITH FRONT DOOR ARMREST
BASE PANEL (for Driver Side)
3. REMOVE POWER WINDOW ...