Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VKAC |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: DOOR / HATCH: BACK DOOR CLOSER SYSTEM: B2251; Back Door Closer Switch Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] |
DTC
|
B2251
|
Back Door Closer Switch Malfunction
|
DESCRIPTION
The power back door ECU (power back door motor unit) receives signals from the latch switch, sector switch and back door courtesy switch, which are built into the back door lock. Based on these switch signals, the latch position of the back door lock is determined.
DTC No.
|
DTC Detection Condition
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Trouble Area
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B2251
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While the back door closer is operating, a malfunction is detected in position information from the back door courtesy switch within a specified amount of time.
|
-
Back door lock assembly
-
Wire harness or connector
-
Power back door ECU (Power back door motor unit)
|
WIRING DIAGRAM
PROCEDURE
1.
|
READ VALUE USING TECHSTREAM (BACK DOOR COURTESY SWITCH)
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(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Back Door / Data List.
(e) Check if the switch functions properly.
Back Door (Power Back Door ECU)
Tester Display
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Measurement Item/Range
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Normal Condition
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Diagnostic Note
|
Back Door Courtesy SW
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Back door courtesy switch signal / ON or OFF
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ON: Back door courtesy switch on
OFF: Back door courtesy switch off
|
-
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OK:
The display is as specified in the normal condition column.
Result
Result
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Proceed to
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NG
|
A
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OK
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B
|
A
|
|
|
2.
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INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH)
|
(a) Remove the back door lock assembly (See page
).
(b) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*1
|
Drive Gear
|
-
|
-
|
*a
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Component without harness connected
(Back Door Lock Assembly)
|
*b
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Release
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*c
|
Close
|
*d
|
Over-latch
|
*e
|
Full-latch
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*f
|
Half-latch
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*g
|
Open-latch
|
*h
|
Back Door Courtesy Switch
|
*i
|
ON
|
*j
|
OFF
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Standard Resistance:
Back Door Courtesy Switch
Tester Connection
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Condition
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Specified Condition
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3 (CTY) - 4 (E)
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Open-latch
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Below 1 Ω
|
Half-latch
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Below 1 Ω
|
Full-latch
|
10 kΩ or higher
|
Over-latch
|
10 kΩ or higher
|
OK
|
|
|
3.
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CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU)
|
(a) Disconnect the W11 back door lock assembly connector and K14 power back door ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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W11-3 (CTY) - K14-20 (FUL)
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Always
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Below 1 Ω
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W11-4 (E) - Body ground
|
Always
|
Below 1 Ω
|
W11-3 (CTY) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|