- Front door outside handle assembly (for driver side)
- Certification ECU (smart key ECU assembly)
- Wire harness or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJKK |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A1; Open in Driver Side Electrical Antenna Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B27A1 |
Open in Driver Side Electrical Antenna Circuit |
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and sends it to the electrical key oscillator built into the front door outside handle assembly (for driver side) at 0.25-second intervals. To detect a key near the driver door, the front door outside handle assembly (for driver side) creates a detection area with a radius of approximately 1.0 m (3.28 ft.) from the driver door at 0.25-second intervals.
DTC B27A1 is detected by the certification ECU (smart key ECU assembly) if an open circuit is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver side) terminals (between CLG1 and ANT1, or CG1B and ANT2).
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B27A1 |
Open circuit detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver side) terminals (between CLG1 and ANT1, or CG1B and ANT2). |
|
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 front door outside handle assembly (for driver side).
OK:
Connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE) |
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Disconnect the front door outside handle assembly (for driver side) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D88-3 (CLG1) - p1-6 (ANT1) |
Always |
Below 1 Ω |
|
D88-4 (CG1B) - p1-3 (ANT2) |
Always |
Below 1 Ω |
|
D88-3 (CLG1) - Body ground |
Always |
10 kΩ or higher |
|
D88-4 (CG1B) - Body ground |
Always |
10 kΩ or higher |
|
p1-6 (ANT1) - Body ground |
Always |
10 kΩ or higher |
|
p1-3 (ANT2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
Text in Illustration
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
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 |
|---|---|---|
|
D88-3 (CLG1) - D88-15 (E) |
|
No pulse generation |
|
D88-3 (CLG1) - D88-15 (E) |
|
Pulse generation |
|
D88-4 (CG1B) - D88-15 (E) |
|
No pulse generation |
|
D88-4 (CG1B) - 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
|
|
|
5. |
REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side) |
(a) Replace the front door outside handle assembly (for driver side) (See page
).
|
|
6. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page
).
(b) Recheck for DTCs.
OK:
DTC B27A1 is not output.
| OK |
|
END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See page
|
|
|