| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJKE |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): Back Door Entry Unlock Function does not Operate; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Back Door Entry Unlock Function does not Operate |
DESCRIPTION
If the entry back door open function does not operate but the back door entry lock function operates, the communication between the vehicle and key is normal. As a faulty part, the back door open switch circuit (from the back door opener switch assembly (opener switch) to the certification ECU (smart key ECU assembly)) is suspected.
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.
- Confirm that another key is not in the cabin.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (ENTRY BACK DOOR OPEN FUNCTION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Data List.
(e) Read the Data List according to the display on the Techstream.
Smart Key (Certification ECU (Smart Key ECU Assembly))
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
B-Dr Opening Operation |
Back door opening Operation / Long, Twice, OFF |
Customization status displayed |
- |
|
Result |
Proceed to |
|---|---|
|
Customize setting is LONG or TWICE. |
A |
|
Customize setting is OFF. |
B |
| B |
|
|
|
2. |
CHECK POWER DOOR LOCK CONTROL SYSTEM |
(a) When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (See page
).
OK:
Door locks operate normally.
| NG |
|
GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) |
|
|
3. |
READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Data List.
(e) Read the Data List according to the display on the Techstream.
Smart Key (Certification ECU (Smart Key ECU Assembly))
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Tr/B-Door Unlock SW |
Back door opener switch assembly (opener switch) / ON or OFF |
ON: Back door opener switch assembly (opener switch) pushed OFF: Back door opener switch assembly (opener switch) not pushed |
- |
OK:
On the Techstream screen, the display changes between ON and OFF as shown in the chart above.
| OK |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See page
|
|
|
4. |
INSPECT BACK DOOR OPENER SWITCH ASSEMBLY |
|
(a) Remove the back door opener switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Position |
Specified Condition |
|---|---|---|
|
2 (E) - 3 (UL) |
Back door opener switch assembly (opener switch) not pushed (OFF) |
10 kΩ or higher |
|
2 (E) - 3 (UL) |
Back door opener switch assembly (opener switch) pushed (ON) |
Below 1 Ω |
Text in Illustration
|
*a |
Component without harness connected (Back Door Opener Switch Assembly) |
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BACK DOOR OPENER SWITCH) |
(a) Disconnect the certification ECU (smart key ECU Assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D88-22 (TSW5) - W14-3 (UL) |
Always |
Below 1 Ω |
|
D88-22 (TSW5) - Body ground |
Always |
10 kΩ or higher |
|
W14-3 (UL) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See page
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|