| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJWG |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Fold Lock Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Fold Lock Switch Circuit |
DESCRIPTION
Each of the left and right seats has a fold lock switch that detects the lock condition of the seat legs and floor when the seat is in the stowed state. If the fold lock switch detects an unlock condition, the 3rd SEAT indicator on the combination meter will come on.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK FOLD SEAT CONTROL ECU |
|
(a) Remove the fold seat control ECU with its connectors still connected (See page
|
|
![2016 - 2020 MY Sienna [12/2015 - ]; SEAT: POWER SEAT CONTROL ECU(for Rear No. 2 Seat): REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
LH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
b2-37 (LCKR) - Body ground |
Fold lock switch lock |
11 to 14 V |
|
Fold lock switch unlock |
Below 1 V |
RH Side
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
a2-37 (LCKR) - Body ground |
Fold lock switch lock |
11 to 14 V |
|
Fold lock switch unlock |
Below 1 V |
Text in Illustration
|
*a |
Component with harness connected (Fold Seat Control ECU) |
(c) Reinstall the fold seat control ECU.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - FOLD LOCK SWITCH) |
(a) Disconnect the b2 or a2 fold seat control ECU connector.
(b) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly (fold lock switch) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Condition |
|---|---|---|
|
b2-37 (LCKR) - b1-11 (FLS+) |
Always |
Below 1 Ω |
|
b2-37 (LCKR) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Condition |
|---|---|---|
|
a2-37 (LCKR) - a1-11 (FLS+) |
Always |
Below 1 Ω |
|
a2-37 (LCKR) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the No. 2 seat cushion frame sub-assembly (fold lock switch) connector.
(e) Reconnect the fold seat control ECU connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FOLD LOCK SWITCH - BODY GROUND) |
|
(a) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly (fold lock switch). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b1-1 (E) - Body ground |
Always |
Below 1 Ω |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a1-1 (E) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to No. 2 Seat Cushion Frame Sub-assembly (Fold Lock Switch)) |
|
*b |
LH Side |
|
*c |
RH Side |
(c) Reconnect the No. 2 seat cushion frame sub-assembly (fold lock switch) connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT NO. 2 SEAT CUSHION FRAME SUB-ASSEMBLY (FOLD LOCK SWITCH) |
|
(a) Remove the No. 2 seat cushion frame sub-assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
11 (FLS+) - 1 (E) |
Fold lock switch unlock |
Below 1 Ω |
|
Fold lock switch lock |
10 kΩ or higher |
Text in Illustration
|
*a |
Component without harness connected (No. 2 Seat Cushion Frame Sub-assembly) |
(c) Reinstall the No. 2 seat cushion frame sub-assembly.
| OK |
|
| NG |
|
REPLACE NO. 2 SEAT CUSHION FRAME SUB-ASSEMBLY (See page
|
|
|