| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJWA |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Fold Seat Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Fold Seat Switch Circuit |
DESCRIPTION
When the fold seat switch is operated, a switch operation signal is sent to the fold seat control ECU. The ECU receives switch operation signals from each switch and activates the folding motor, reclining motor, and release actuator.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK FOLD SEAT CONTROL ECU (FOLD SEAT SWITCH SIGNAL) |
|
(a) Remove the fold seat control ECU with its connectors still connected (See page
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
LH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
b2-14 (TBL) - Body ground |
Folding switch off |
11 to 14 V |
|
Back door open Folding switch on |
Below 1 V |
|
|
b2-15 (RTRN) - Body ground |
Stowing/Return switch off |
11 to 14 V |
|
Back door open Stowing/Return switch on (Return) |
Below 1 V |
|
|
b2-16 (FOLD) - Body ground |
Stowing/Return switch off |
11 to 14 V |
|
Back door open Stowing/Return switch on (Stowing) |
Below 1 V |
RH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
a2-14 (TBL) - Body ground |
Folding switch off |
11 to 14 V |
|
Back door open Folding switch on |
Below 1 V |
|
|
a2-15 (RTRN) - Body ground |
Stowing/Return switch off |
11 to 14 V |
|
Back door open Stowing/Return switch on (Return) |
Below 1 V |
|
|
a2-16 (FOLD) - Body ground |
Stowing/Return switch off |
11 to 14 V |
|
Back door open Stowing/Return switch on (Stowing) |
Below 1 V |
Text in Illustration
|
*a |
Component with harness connected (Fold Seat Control ECU) |
|
*b |
LH Side |
|
*c |
RH Side |
(c) Reinstall the fold seat control ECU.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
|
|
2. |
INSPECT FOLD SEAT SWITCH ASSEMBLY |
|
(a) Remove the fold seat switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (FOLD) - 5 (E) |
Stowing/Return switch on (Stowing) |
Below 30 Ω |
|
7 (RTRN) - 5 (E) |
Stowing/Return switch on (Return) |
Below 30 Ω |
|
8 (TBL) - 5 (E) |
Folding switch on |
Below 30 Ω |
Text in Illustration
|
*a |
Component without harness connected (Fold Seat Switch Assembly) |
(c) Reinstall the fold seat switch assembly.
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - FOLD SEAT SWITCH) |
(a) Disconnect the b2 or a2 fold seat control ECU connector.
(b) Disconnect the K17 or K20 fold seat switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b2-14 (TBL) - K17-8 (TBL) |
Always |
Below 1 Ω |
|
b2-14 (TBL) - Body ground |
Always |
10 kΩ or higher |
|
b2-15 (RTRN) - K17-7 (RTRN) |
Always |
Below 1 Ω |
|
b2-15 (RTRN) - Body ground |
Always |
10 kΩ or higher |
|
b2-16 (FOLD) - K17-2 (FOLD) |
Always |
Below 1 Ω |
|
b2-16 (FOLD) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a2-14 (TBL) - K20-8 (TBL) |
Always |
Below 1 Ω |
|
a2-14 (TBL) - Body ground |
Always |
10 kΩ or higher |
|
a2-15 (RTRN) - K20-7 (RTRN) |
Always |
Below 1 Ω |
|
a2-15 (RTRN) - Body ground |
Always |
10 kΩ or higher |
|
a2-16 (FOLD) - K20-2 (FOLD) |
Always |
Below 1 Ω |
|
a2-16 (FOLD) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the fold seat switch assembly connector.
(e) Reconnect the fold seat control ECU connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT SWITCH - BACK DOOR COURTESY SWITCH) |
(a) Disconnect the K17 or K20 fold seat switch assembly connector.
(b) Disconnect the W11 back door lock assembly (back door courtesy switch) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K17-5 (E) - W11-3 (CTY) |
Always |
Below 1 Ω |
|
K17-5 (E) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K20-5 (E) - W11-3 (CTY) |
Always |
Below 1 Ω |
|
K20-5 (E) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the back door lock assembly (back door courtesy switch) connector.
(e) Reconnect the fold seat switch assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH) |
Text in Illustration
|
*a |
Component without harness connected (Back Door Lock Assembly (Back Door Courtesy Switch)) |
*b |
Open-latch |
|
*c |
Half-latch |
*d |
Full-latch |
|
*e |
Over-latch |
- |
- |
(a) Remove the back door lock assembly (See page
![2016 - 2020 MY Sienna [12/2015 - ]; DOOR LOCK: BACK DOOR LOCK: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
3 (CTY) - 4 (E) |
Open-latch |
Below 1 Ω |
|
Half-latch |
Below 1 Ω |
|
|
Full-latch |
10 kΩ or higher |
|
|
Over-latch |
10 kΩ or higher |
(c) Reinstall the back door lock assembly.
| NG |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY SWITCH - BODY GROUND) |
|
(a) Disconnect the W11 back door lock assembly (back door courtesy switch) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
W11-4 (E) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to Back Door Lock Assembly (Back Door Courtesy Switch)) |
(c) Reconnect the back door lock assembly (back door courtesy switch) connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|