Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJW8 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: Back Door Courtesy Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] |
Back Door Courtesy Switch Circuit
|
DESCRIPTION
The fold seat control ECU receives signals from the back door courtesy switch and detects the state of the back door (open/close). If the ECU does not detect that the back door is open, the seat stowing and return functions are not available.
WIRING DIAGRAM
PROCEDURE
1.
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CHECK FOLD SEAT CONTROL ECU (BACK DOOR COURTESY 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
|
Condition
|
Specified Condition
|
b2-5 (BDCY) - Body ground
|
Back door closed
|
11 to 14 V
|
Back door open
|
Below 1 V
|
RH Side
Tester Connection
|
Condition
|
Specified Condition
|
a2-5 (BDCY) - Body ground
|
Back door closed
|
11 to 14 V
|
Back door open
|
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
)
|
NG
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY SWITCH - BODY GROUND)
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(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.
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
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3.
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INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH)
|
Text in Illustration
*a
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Component without harness connected
(Back Door Lock Assembly (Back Door Courtesy Switch))
|
*b
|
Open-latch
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*c
|
Half-latch
|
*d
|
Full-latch
|
*e
|
Over-latch
|
-
|
-
|
(a) Remove the back door lock assembly (See page
).
(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.
OK
|
|
|
4.
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CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - BACK DOOR COURTESY SWITCH)
|
(a) Disconnect the b2 or a2 fold seat control ECU 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
|
b2-5 (BDCY) - W11-3 (CTY)
|
Always
|
Below 1 Ω
|
b2-5 (BDCY) - Body ground
|
Always
|
10 kΩ or higher
|
RH Side
Tester Connection
|
Condition
|
Specified Condition
|
a2-5 (BDCY) - W11-3 (CTY)
|
Always
|
Below 1 Ω
|
a2-5 (BDCY) - Body ground
|
Always
|
10 kΩ or higher
|
(d) Reconnect the back door lock assembly (back door courtesy switch) connector.
(e) Reconnect the fold seat control ECU connector.
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|