| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJWB |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Folding Motor Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Folding Motor Circuit |
DESCRIPTION
The fold seat control ECU receives a switch operation signal from the fold seat switch and activates the folding motor. At this time, the Hall IC (seat cushion position sensor) detects the actuation signal. The fold seat control ECU uses signals from the Hall IC (seat cushion position sensor) to detect if an object is caught or if any other abnormal condition has occurred.
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 |
Condition |
Specified Condition |
|---|---|---|
|
b2-23 (SFLD) - b2-30 (SG1) |
Motor is operating |
Pulse generation |
|
b2-24 (SV1) - b2-30 (SG1) |
Back door open |
9 to 14 V |
|
b3-1 (FLD+) - b3-5 (FLD-) |
Engine switch off Shift lever in P Back door open Stowing/Return switch on (Stowing) |
11 to 14 V |
|
b3-5 (FLD-) - b3-1 (FLD+) |
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 |
|---|---|---|
|
a2-23 (SFLD) - a2-30 (SG1) |
Motor is operating |
Pulse generation |
|
a2-24 (SV1) - a2-30 (SG1) |
Back door open |
9 to 14 V |
|
a3-1 (FLD+) - a3-5 (FLD-) |
Engine switch off Shift lever in P Back door open Stowing/Return switch on (Stowing) |
11 to 14 V |
|
a3-5 (FLD-) - a3-1 (FLD+) |
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 - FOLDING MOTOR) |
(a) Disconnect the b2 and b3 or a2 and a3 fold seat control ECU connectors.
(b) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly (folding motor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b2-23 (SFLD) - b1-2 (HLS) |
Always |
Below 1 Ω |
|
b2-23 (SFLD) - Body ground |
Always |
10 kΩ or higher |
|
b2-24 (SV1) - b1-5 (HLV) |
Always |
Below 1 Ω |
|
b2-24 (SV1) - Body ground |
Always |
10 kΩ or higher |
|
b2-30 (SG1) - b1-12 (HLG) |
Always |
Below 1 Ω |
|
b2-30 (SG1) - Body ground |
Always |
10 kΩ or higher |
|
b3-1 (FLD+) - b1-13 (FWD) |
Always |
Below 1 Ω |
|
b3-1 (FLD+) - Body ground |
Always |
10 kΩ or higher |
|
b3-5 (FLD-) - b1-8 (BACK) |
Always |
Below 1 Ω |
|
b3-5 (FLD-) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a2-23 (SFLD) - a1-2 (HLS) |
Always |
Below 1 Ω |
|
a2-23 (SFLD) - Body ground |
Always |
10 kΩ or higher |
|
a2-24 (SV1) - a1-5 (HLV) |
Always |
Below 1 Ω |
|
a2-24 (SV1) - Body ground |
Always |
10 kΩ or higher |
|
a2-30 (SG1) - a1-12 (HLG) |
Always |
Below 1 Ω |
|
a2-30 (SG1) - Body ground |
Always |
10 kΩ or higher |
|
a3-1 (FLD+) - a1-13 (FWD) |
Always |
Below 1 Ω |
|
a3-1 (FLD+) - Body ground |
Always |
10 kΩ or higher |
|
a3-5 (FLD-) - a1-8 (BACK) |
Always |
Below 1 Ω |
|
a3-5 (FLD-) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the No. 2 seat cushion frame sub-assembly (folding motor) connector.
(e) Reconnect the fold seat control ECU connectors.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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