| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJWD |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Release Actuator Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Release Actuator Circuit |
DESCRIPTION
The fold seat control ECU receives a switch operation signal from the fold seat switch and activates the release actuator. The release actuator releases the lock of the stowed seat based on a drive voltage received from the ECU.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK FOLD SEAT CONTROL ECU |
|
(a) Remove the fold seat control ECU with its connector 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 |
Condition |
Specified Condition |
|---|---|---|
|
b3-3 (RACT) - Body ground |
Engine switch off Shift lever in P Back door open Stowing/Return switch on (Return) |
11 to 14 V |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a3-3 (RACT) - Body ground |
Engine switch off Shift lever in P Back door open Stowing/Return switch on (Return) |
11 to 14 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. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - RELEASE ACTUATOR) |
(a) Disconnect the b3 or a3 fold seat control ECU connector.
(b) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly (release actuator) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b3-3 (RACT) - b1-7 (ACT) |
Always |
Below 1 Ω |
|
b3-3 (RACT) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a3-3 (RACT) - a1-7 (ACT) |
Always |
Below 1 Ω |
|
a3-3 (RACT) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the No. 2 seat cushion frame sub-assembly (release actuator) connector.
(e) Reconnect the fold seat control ECU connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RELEASE ACTUATOR - BODY GROUND) |
|
(a) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly (release actuator) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b1-4 (E) - Body ground |
Always |
Below 1 Ω |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a1-4 (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 (Release Actuator)) |
|
*b |
LH Side |
|
*c |
RH Side |
(c) Reconnect the No. 2 seat cushion frame sub-assembly (release actuator) connector.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|