| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJGH |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door cannot be Opened; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Only Back Door cannot be Opened |
DESCRIPTION
- The main body ECU detects the condition of the back door opener switch assembly.
- The main body ECU receives signals from the back door opener switch assembly and activates the back door lock motor according to the signals.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK POWER DOOR LOCK CONTROL SYSTEM (BASIC FUNCTION) |
(a) Check the power door lock control system (basic function).
OK:
Power door lock control system operates normally.
| NG |
|
|
|
2. |
READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body Electrical / Data List.
(e) Read the Data List according to the display on the Techstream.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Back Door Open Handle SW |
Back door opener switch/ON or OFF |
ON: Back door opener switch pushed OFF: Back door opener switch not pushed |
- |
OK:
The Techstream indicates ON or OFF according to the switch operation as shown in the table.
| NG |
|
|
|
3. |
INSPECT BACK DOOR LOCK ASSEMBLY |
|
(a) Remove the back door lock assembly (See page
|
|
(b) Check the operation of the door lock motor.
(1) Move the door lock to the lock position.
(2) Apply battery voltage to the door lock motor and check the operation of the door lock motor.
OK:
|
Measurement Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal 2 (ACT+) Battery negative (-) → Terminal 1 (ACT-) |
Unlocks |
(c) Check the operation of the door courtesy switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (ACT-) - 3 (D+) |
Locked |
10 kΩ or higher |
|
1 (ACT-) - 3 (D+) |
Unlocked |
Below 1 Ω |
Text in Illustration
|
*a |
Lock |
|
*b |
Unlock |
|
*c |
Component without harness connected (Back Door Lock Assembly) |
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU) |
(a) Disconnect the W12 back door lock assembly connector.
(b) Disconnect the D13 main body ECU connector.
(c) Disconnect the 2H instrument panel junction block assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
W12-2 (ACT+) - 2H-11 |
Always |
Below 1 Ω |
|
W12-2 (ACT+) - Body ground |
Always |
10 kΩ or higher |
|
W12-3 (D+) - D13-19 (BCTY) |
Always |
Below 1 Ω |
|
W12-3 (D+) - Body ground |
Always |
10 kΩ or higher |
|
W12-1 (ACT-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
REPLACE MAIN BODY ECU |
(a) Temporarily replace the main body ECU with a new or normally function one (See page
![2016 - 2020 MY Sienna [12/2015 - ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
|
|
6. |
READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body Electrical / Data List.
(e) Read the Data List according to the display on the Techstream.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Back Door Open Handle SW |
Back door opener switch/ON or OFF |
ON: Back door opener switch pushed OFF: Back door opener switch not pushed |
- |
OK:
The Techstream indicates ON or OFF according to the switch operation as shown in the table.
| OK |
|
END (MAIN BODY ECU IS DEFECTIVE) |
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
7. |
INSPECT BACK DOOR OPENER SWITCH ASSEMBLY |
|
(a) Remove the back door opener switch assembly (See page
|
|
(b) Check the operation of the opener switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (E) - 3 (UL) |
Back door opener switch not pushed |
10 kΩ or higher |
|
2 (E) - 3 (UL) |
Back door opener switch pushed |
Below 1 Ω |
Text in Illustration
|
*a |
Component without harness connected (Back Door Opener Switch Assembly) |
| NG |
|
|
|
8. |
CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MAIN BODY ECU) |
(a) Disconnect the W14 back door opener switch assembly connector.
(b) Disconnect the D13 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
W14-3 (UL) - D13-23 (BDSU) |
Always |
Below 1 Ω |
|
W14-3 (UL) - Body ground |
Always |
10 kΩ or higher |
|
W14-2 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|