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05-1762
DIAGNOSTICS - POWER BACK DOOR SYSTEM 05BZT-04
DTC B2222 PBD PULSE SENSOR MALFUNCTION
CIRCUIT DESCRIPTION
S A pulse sensor is built into the back door for a jam and foreign object detection and for back door posi-
tion detection. The jam and foreign object detection feature of the pulse sensor monitors the operating
speed of the back door while the power back door is in operation. The back door position detection
feature of the pulse sensor monitors the back door location. If the back door position detection feature
outputs a pulse signal that is out of the normal range, the power back door ECU will set DTC B2222.
S If DTC B2222 sets, the power back door system will be turned off. Thus, the back door can be moved
freely and will be switched to manual operation mode (not electrically controlled).
S In order to restore the power back door system to normal operation mode, first solve the problem indi-
cated by DTC B2222 and then manually close the back door fully (reset operation).
DTC No. DTC Detection Condition Trouble Area
S Wire harness
B2222 Power back door does not operate S Power back door drive unit
S Power back door ECU
WIRING DIAGRAM
P12 Power Back Door ECU
Power Back Door Drive Unit
23
6 GR
DSG P13 DSG
24
5 L-B
DS2 P13 DS2
25
1 BR
DS1 P13 DS1
26
2 Y
DSV P13 DSV
1
7 B
BD+ P14 BD+
3
8 W
BD- P14 BD-
7
3 P
CL+ P14 CL+
6
9 O
CL- P14 CL-
B67777
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1945
05-1763
DIAGNOSTICS - POWER BACK DOOR SYSTEM
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS (POWER BACK DOOR DRIVE UNIT - POWER BACK
DOOR ECU)
Wire Harness Side (a) Disconnect the P12 unit and P13 ECU connectors.
(b) Check the resistance between the wire harness side con-
P12 nectors.
Power Back Door Drive Unit Standard (Check for open circuit):
Terminal No. Specified Condition
P12-6 - P13-23 (DSG)
P12-5 - P13-24 (DS2)
Below 1
P12-1 - P13-25 (DS1)
P12-2 - P13-26 (DSV)
P13
Power Back Door ECU
B68455
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1946
05-1764
DIAGNOSTICS - POWER BACK DOOR SYSTEM
2 INSPECT POWER BACK DOOR DRIVE UNIT
Open (a) Remove the unit.
(b) Connect the battery positive (+) lead to terminal 3 and bat-
tery negative (-) terminal lead to terminal 9.
(c) Apply battery voltage to the terminals and check the mo-
tor operation.
Standard:
Measurement Condition Specified Condition
Battery positive (+) Terminal 8
Open
Battery negative (-) Terminal 7
Battery positive (+) Terminal 7
Close
Battery negative (-) Terminal 8
(d) Check the resistance of the clutch terminals.
Standard:
Close
Terminal No. Specified Condition
3 -9 4.0
(e) Reinstall the unit with the connector connected.
B68913
(f) Check the pulse of the pulse sensor.
10 V 10 ms
(1) Using an oscilloscope, check the pulse generated
when the door is manually opened and closed.
Standard (Reference):
GND Terminal 1 - 6, 5 - 6
Tool setting 10 V/DIV., 10 ms/DIV.
Vehicle condition Door moving
HINT:
1 cycle of approx. 10 to 20 msec.
B68909 A cycle of the pulse changes between approx. 10 to 20 msec.
according to the speeds that the slide door is moving.
NOTICE:
When disconnecting the drive unit, initialize the power back door system (See page 05-1752 ).
NG REPLACE POWER BACK DOOR DRIVE UNIT
OK
REPLACE POWER BACK DOOR ECU
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1947
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