- Outside electrical key oscillator (for rear side)
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJKP |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A8; Open in Outside Luggage Compartment Electrical Key Antenna Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B27A8 |
Open in Outside Luggage Compartment Electrical Key Antenna Circuit |
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
![2016 - 2020 MY Sienna [12/2015 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
). 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 |
|---|---|---|
|
D87-19 (CLG8) - q1-1 (CLG5) |
Always |
Below 1 Ω |
|
D87-20 (CG8B) - q1-2 (CLGB) |
Always |
Below 1 Ω |
|
D87-19 (CLG8) - Body ground |
Always |
10 kΩ or higher |
|
D87-20 (CG8B) - Body ground |
Always |
10 kΩ or higher |
|
q1-1 (CLG5) - Body ground |
Always |
10 kΩ or higher |
|
q1-2 (CLGB) - Body ground |
Always |
10 kΩ or higher |
| 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:
Text in Illustration
|
|
| NG |
|
|
|
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 |
|
|
|