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05-1780
DIAGNOSTICS - POWER BACK DOOR SYSTEM 05BZV-04
JAM PROTECTION FUNCTION IS ACTIVATED WHILE POWER
BACK DOOR IS OPERATING (FOR SOME REASONS*)
* It may be caused by ill-fitting back door, faulty touch sensor or faulty pulse sensor.
CIRCUIT DESCRIPTION
S The power back door ECU activates the back motor to open/close the power back door, thus controlling
the power back door operation. For jam and foreign object detection, the power back door system uses
the pulse sensor built into the power back door drive unit and the 2 touch sensors installed in both sides
of the back door respectively.
S When either of the touch sensors comes in contact with an object while the back door is closing, the
resistance of the touch sensor changes, which is monitored by the power back door ECU. If a change
in resistance is detected, the ECU will judge it to be a jam and foreign object detection in the direction
that the power back door is moving and reverse back motor rotation. The touch sensors operate only
while the back door is closing. They do not operate while the back door is opening.
S The pulse sensor detects changes in the operating speed of the back door while the back door is oper-
ating. When the sensor detects a change in the operating speed, the pulse from the sensor also
changes, which is monitored by the power back door ECU. If there is a pulse change detected, the
ECU will judge it to be a jam and foreign object detection in the direction that the power back door is
moving and reverse back motor rotation.
S If a jam and foreign object detection by the touch sensors and the pulse sensor has occurred 2 or more
consecutive times and if the 2nd or most recent detection has occurred during closing, then the power
back door ECU will cancel automated back door operation and switch the back door to manual opera-
tion mode (not electrically controlled). In order to restore the power back door system to normal opera-
tion mode, perform either of the following: manually close the back door fully or press the satellite
switch for the power back door or the power back door control switch again (reset operation).
WIRING DIAGRAM
See page 05-1765 .
INSPECTION PROCEDURE
1 CHECK DTC
(a) Check for DTC B2222. DTC B2222 indicates a pulse sensor malfunction.
(1) Without code outputs, proceed to A.
(2) With code outputs, proceed to B.
B GO TO DTC B2222 (See page 05-1762 )
A
2 VISUALLY CHECK
(a) Check for foreign objects on the operating area.
NG REMOVE OBSTACLES AND RE-CHECK DOOR
OPERATION
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1963
05-1781
DIAGNOSTICS - POWER BACK DOOR SYSTEM
3 MANUAL OPERATION
(a) Turn off* the power door main switch in order to locate the area where reverse operation has been
triggered.
* OFF is the condition when the orange paint on the top of the switch does not appear
(b) Move the back door manually, and then check to make sure no obstacles are present (no extra resis-
tance) around the reverse operation area and that the back door smoothly operates.
NG ADJUST FITTING CONDITION OF BACK DOOR
(See page 75-106 )
OK
4 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check the DATA LIST for proper functioning of the power back door touch
sensor LH.
Standard (Power back door ECU):
Diagnostic
Item Measurement Item/Display (Range) Normal Condition
Note
Power back door touch sensor LH OFF: Power back door touch sensor LH is free
PBD TOUCH SEN L signal ON: Power back door touch sensor LH is pressed -
/OFF, ON or OPEN OPEN: Power back door touch sensor LH is opened
OK Go to step 10
NG
5 INSPECT POWER BACK DOOR TOUCH SENSOR LH
(a) Check the resistance of the sensor.
Standard:
Terminal No. Condition Specified condition
Free Approx. 1 k
1 -2
Pressed Less than 100
Free Pressed
1 2
B67899
B58517 B68908
NG REPLACE POWER BACK DOOR TOUCH
SENSOR LH
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1964
05-1782
DIAGNOSTICS - POWER BACK DOOR SYSTEM
6 CHECK WIRE HARNESS (POWER BACK DOOR TOUCH SENSOR LH - POWER
BACK DOOR ECU)
Wire Harness Side (a) Disconnect the P15 sensor and P13 ECU connectors.
(b) Check the resistance between the wire harness side con-
nectors.
P15
Standard (Check for open circuit):
Power Back Door Touch Sensor LH
Terminal No. Specified Condition
P15-1 - P13-14 (OSL)
Below 1
P15-2 - P13-15 (OSE)
P13
Power Back Door ECU
NG REPAIR OR REPLACE HARNESS AND
B68456 CONNECTOR
OK
REPLACE POWER BACK DOOR ECU
7 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check the DATA LIST for proper functioning of the power back door touch
sensor RH.
Standard (Power back door ECU):
Diagnostic
Item Measurement Item/Display (Range) Normal Condition
Note
Power back door touch sensor RH OFF: Power back door touch sensor RH is free
PBD TOUCH SEN R signal ON: Power back door touch sensor RH is pressed -
/OFF, ON or OPEN OPEN: Power back door touch sensor RH is opened
OK Go to step 10
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1965
05-1783
DIAGNOSTICS - POWER BACK DOOR SYSTEM
8 INSPECT POWER BACK DOOR TOUCH SENSOR RH
(a) Check the resistance of the sensor.
Standard:
Terminal No. Condition Specified condition
Free Approx. 1 k
1 -2
Pressed Less than 100
Free Pressed
1 2
B67899
B58517 B68908 NG REPLACE POWER BACK DOOR TOUCH
SENSOR RH
OK
9 CHECK WIRE HARNESS (POWER BACK DOOR TOUCH SENSOR RH - POWER
BACK DOOR ECU)
Wire Harness Side (a) Disconnect the P16 sensor and P13 ECU connectors.
(b) Check the resistance between the wire harness side con-
nectors.
P16
Standard (Check for open circuit):
Power Back Door Touch Sensor RH
Terminal No. Specified Condition
P16-1 - P13-16 (OSR)
Below 1
P16-2 - P13-15 (OSE)
P13
Power Back Door ECU
NG REPAIR OR REPLACE HARNESS AND
B68456 CONNECTOR
OK
REPLACE POWER BACK DOOR ECU
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1966
05-1784
DIAGNOSTICS - POWER BACK DOOR SYSTEM
10 PERFORM ACTIVE TEST USING HAND-HELD TESTER
(a) Select the ACTIVE TEST and then check that the power back door drive unit operates.
HINT:
During the ACTIVE TEST, the hand-held tester sends a signal to the power back door ECU to drive the drive
unit. If the drive unit operates, the drive unit itself and the wire harness between the drive unit and power
back door ECU are considered to be functioning normally.
Standard (Power back door ECU):
Item Test Details Diagnostic Note
Power back door motor is operate
PBD MOTOR Clutch is OFF while power slide door motor is operating
OFF/FORWARD/REVERSE
Power back door clutch is operate
PBD CLUTCH Power slide door motor is OFF when clutch is ON
OFF/ON
OK REPLACE POWER BACK DOOR ECU AND RE-
CHECK DOOR OPERATION
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1967
05-1785
DIAGNOSTICS - POWER BACK DOOR SYSTEM
11 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
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1968
05-1786
DIAGNOSTICS - POWER BACK DOOR SYSTEM
12 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
REPLACE POWER BACK DOOR ECU
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1969
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