- Indoor electrical key oscillator (for front floor)
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJKM |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A5; Open in Front Floor Electrical Key Oscillator Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B27A5 |
Open in Front Floor Electrical Key Oscillator Circuit |
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and sends it to the indoor electrical key oscillator (for front floor). To detect the key inside the cabin, the indoor electrical key oscillator (for front floor) creates a detection area in the cabin.
DTC B27A5 is detected by the certification ECU (smart key ECU assembly) when an open circuit occurs between the certification ECU (smart key ECU assembly) and indoor electrical key oscillator (for front floor) terminals (between CLG5 and CLG3, or CG5B and CLGB).
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B27A5 |
Open circuit detected between the certification ECU (smart key ECU assembly) and indoor electrical key oscillator (for front floor) terminals (between CLG5 and CLG3, or CG5B 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 indoor electrical key oscillator (for front floor).
OK:
Connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) |
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Disconnect the indoor electrical key oscillator (for front floor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D88-7 (CLG5) - L7-1 (CLG3) |
Always |
Below 1 Ω |
|
D88-8 (CG5B) - L7-2 (CLGB) |
Always |
Below 1 Ω |
|
D88-7 (CLG5) - Body ground |
Always |
10 kΩ or higher |
|
D88-8 (CG5B) - Body ground |
Always |
10 kΩ or higher |
|
L7-1 (CLG3) - Body ground |
Always |
10 kΩ or higher |
|
L7-2 (CLGB) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (INDOOR ELECTRICAL KEY OSCILLATOR SIGNAL OUTPUT) |
|
(a) Reconnect the certification ECU (smart key ECU assembly) connector. |
|
(b) Measure the resistance and check for pulses according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D88-15 (E) - Body ground |
Always |
Below 1 Ω |
OK:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D88-7 (CLG5) - D88-15 (E) |
|
No pulse generation |
|
D88-7 (CLG5) - D88-15 (E) |
|
Pulse generation |
|
D88-8 (CG5B) - D88-15 (E) |
|
No pulse generation |
|
D88-8 (CG5B) - D88-15 (E) |
|
Pulse generation |
Text in Illustration
|
*a |
Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See page
|
|
|
4. |
REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor) |
(a) Replace the indoor electrical key oscillator (for front floor) (See page
).
|
|
5. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page
).
(b) Recheck for DTCs.
OK:
DTC B27A5 is not output.
| OK |
|
END (INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See page
|
|
|