| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJWF |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Rear Power Seat Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Rear Power Seat Switch Circuit |
DESCRIPTION
When the rear power seat switch is operated, a recline signal is sent to the fold seat control ECU. The ECU activates the reclining motor based on the signal from rear power seat switch.
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 |
|---|---|---|
|
b2-12 (RCLF) - Body ground |
Always |
11 to 14 V |
|
Rear power seat switch on (Forward) |
Below 1 V |
|
|
b2-13 (RCLR) - Body ground |
Always |
11 to 14 V |
|
Rear power seat switch on (Backward) |
Below 1 V |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a2-12 (RCLF) - Body ground |
Always |
11 to 14 V |
|
Rear power seat switch on (Forward) |
Below 1 V |
|
|
a2-13 (RCLR) - Body ground |
Always |
11 to 14 V |
|
Rear power seat switch on (Backward) |
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. |
CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 2 SEAT CUSHION FRAME) |
(a) Disconnect the b2 or a2 fold seat control ECU connector.
(b) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
LH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
b2-12 (RCLF) - b1-3 (FWD) |
Always |
Below 1 Ω |
|
b2-12 (RCLF) - Body ground |
Always |
10 kΩ or higher |
|
b2-13 (RCLR) - b1-10 (BACK) |
Always |
Below 1 Ω |
|
b2-13 (RCLR) - Body ground |
Always |
10 kΩ or higher |
RH Side
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
a2-12 (RCLF) - a1-3 (FWD) |
Always |
Below 1 Ω |
|
a2-12 (RCLF) - Body ground |
Always |
10 kΩ or higher |
|
a2-13 (RCLR) - a1-10 (BACK) |
Always |
Below 1 Ω |
|
a2-13 (RCLR) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the No. 2 seat cushion frame sub-assembly connector.
(e) Reconnect the fold seat control ECU connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT REAR POWER SEAT SWITCH |
|
(a) Remove the rear power seat switch (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
4 (RECF) - 3 (E) |
Always |
10 kΩ or higher |
|
Rear power seat switch on (Forward) |
Below 1 Ω |
|
|
1 (RECR) - 3 (E) |
Always |
10 kΩ or higher |
|
Rear power seat switch on (Backward) |
Below 1 Ω |
Text in Illustration
|
*a |
Component without harness connected (Rear Power Seat Switch) |
(c) Reinstall the rear power seat switch.
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (NO. 2 SEAT CUSHION FRAME - BODY GROUND) |
|
(a) Disconnect the b1 or a1 No. 2 seat cushion frame sub-assembly connector. |
|
(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) |
|
*b |
LH Side |
|
*c |
RH Side |
(c) Reconnect the No. 2 seat cushion frame sub-assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
REPAIR OR REPLACE HARNESS OR CONNECTOR (WIRE INSIDE SEAT) |
(a) Repair or replace harness or connector (wire inside seat) and check that the malfunction disappears.
OK:
Malfunction disappears.
| OK |
|
END |
| NG |
|
|
|