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05-1765
DIAGNOSTICS - POWER BACK DOOR SYSTEM 05BZU-02
POWER BACK DOOR DOES NOT OPERATE
CIRCUIT DESCRIPTION
S The power back door operates only when the power back door main switch is ON. The power back
door ECU controls the power back door by activating the back door motor (built into the power back
door drive unit) to open/close the back door.
S A request signal from the satellite switch for power back door is input to the body ECU, which then
sends this signal using a BEAN line to the power back door ECU so that the power back door is opened/
closed.
S When a request signal is output from the satellite switch while the power back door is operating,
the power back door reverses operation.
S If the power back door is manually moved in a specified distance when the back door is in the fully
closed/opened position, the power back door will be activated and continue to operate to the fully
opened/closed position.
S A request signal from the outside handle switch is directly input to the power back door ECU.
S Pulling the outside handle switch when the back door is in the fully closed position releases the
latch of the closer and makes the back door not-fully-closed, which does not activate the power
back door to open. (The power back door operation can be switched by customization.)
S When a request signal is output from the outside handle switch while the power back door is oper-
ating, the power back door reverses operation.
S When a request signal is output from the outside handle switch when the back door is in the fully
open position, the power back door is activated to fully close. (Power back door operation can
be changed by customization.)
S When the touch sensor has an open/short-circuit, closing of the power back door is disabled.
NOTICE:
When disconnecting the negative (-) terminal cable of the battery or drive unit, initialize the power
back door system (See page 05-1752 ).
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1948
05-1766
DIAGNOSTICS - POWER BACK DOOR SYSTEM
WIRING DIAGRAM
Instrument Panel J/B Assy
S13
J18 Engine Room J/B Assy
Satellite Switch
17 J/C 11 1 16
Y-G* Y-G* Y-G* GND W-B* W-B
DSDS B7 ID1 1R 1L
93 103 1 L 5
7 9
V* V* V*
PSDS B7 ID1 IE
92 102 4 R
2 10
PBDS B7 Y-R* Y-R* ID1 Y-R*
96 106 3 HATCH
Multiplex Network
Power Back Door ECU
Body ECU J19 J37
21 J/C 4 J/C 20 J/C 22
R-L 13 73 R-L R-L 11 1 R-L
MPX2 B7 J13 J14 P13 MPX1
7 1 2
B-R B-R B-R
IB1 BF1 P14 B
I15
Ignition Switch Assy
ACC
B-Y 2 1 W-L
IG1 AM1
Instrument Panel J/B Assy IE
2 F12 FL Block 10
AM1
1H
IG1 Relay
29 16
PBD 2 1 W-B
1H 1L J37
1 1 9 J/C 9
W 5 3 B-R 15 5 B-R
F7 1A 1P P13 IG
ECU-IG
ALT
Engine Room J/B Assy
Engine Room J/B Assy
1 1 Short Pin ECU-B 8 24 7
W W-L
F8 2D 2C 1C 1L
1 2
1 F6
W
FL W-L
Main J19 J37
J/C 7 J/C 23 5 J/C 10
54 15 13 3
J13 J14 BE1 P13 ECUB
W-L W-L W-L W-L
Battery
*: w/ Power Slide Door Continued on next page
B68887
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1949
05-1767
DIAGNOSTICS - POWER BACK DOOR SYSTEM
Continued from the previous page
9 1
LG LG
BG3 P13 BZR-
10 2
2 1 O O
BG3 P13 BZR+
P17
Power Back Door Warning Buzzer
J/C
23 7 5
W-B W
J11 J12 P13 MSE
25 9 6
5 4 L L
P12 J11 J12 P13 MSW
P7
Power Back Door Drive Unit 23
Power Back Door Main Switch
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-
P15
J40 Power Back Touch Sensor LH
J/C
3 14
A Y-B 2 1 G-W G-W
BG3 P13 OSL
P16
Power Back Touch Sensor RH
6 16
A Y-B 2 1 BR-Y BR-Y
BG3 P13 OSR
7 15
A Y-B Y-B
BG3 P13 OSE
12 1 3
2 1 G-B G-B G-B
BG1 BH1 P13 HSW
B12
Back Door Opener Switch Assy
8 7
W-B 5 R R
BG3 P13 HAF
4 21
6 V V
BG3 P13 POS
A 11 8
J41 A W-B 4 3 B-W B-W
J/C BG3 P13 FUL
1 12
1 L-W L-W
BG3 P13 DC+
2 11
BN 2 G G
BG3 P13 DC-
B10 8
Back Door Lock Assy W-B
P14 GND
BM
Power Back Door ECU
B61929
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1950
05-1768
DIAGNOSTICS - POWER BACK DOOR SYSTEM
INSPECTION PROCEDURE
1 BASIC INSPECTION
(a) Conditions necessary for the power back door to open:
(1) Power back door main switch is in the ON position (switch free: orange paint on the top of the
switch appears).
(2) Back door is between the fully closed position and approximately around the half-open position.
(3) Shift lever is in the P position when the ignition switch is ON (When the ignition switch is OFF,
the power back door operates in any position of the shift lever.)
(b) Conditions necessary for the power back door to close:
(1) Power back door main switch is in the ON position (switch free: orange paint on the top of the
switch appears).
(2) Back door is between approximately around the half-open position and the fully open position.
(3) Back door touch sensor is not damaged and deformed.
OK
2 INSPECT FUSE (ECU-B, ECU IG, AM1)
(a) Inspect the ECU-B, ECU IG and AM1 fuses (See page 68-1 ).
NG REPLACE FUSE
OK
3 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
4 INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX
COMMUNICATION SYSTEM (BEAN)
(a) Use the hand-held tester to check for normal function of the multiplex communication system.
(1) (ECU unconnected, communication line malfunctioning) Without DTC B1214, B1215 or B1287
outputs, proceed to A.
(2) (ECU unconnected, communication line malfunctioning) With DTC B1214, B1215 or B1287 out-
puts, proceed to B.
B GO TO MULTIPLEX COMMUNICATION SYSTEM
(See page 05-1876 )
A
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1951
05-1769
DIAGNOSTICS - POWER BACK DOOR SYSTEM
5 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check the DATA LIST for proper functioning of the power back door main
switch.
Standard (Power back door ECU):
Diagnostic
Item Measurement Item/Display (Range) Normal Condition
Note
Power back door main switch signal ON: Orange paint on top of switch appears
PBD MAIN SW -
/ON or OFF OFF: Orange paint on top of switch does not appear
OK Go to step 8
NG
6 INSPECT POWER BACK DOOR MAIN SWITCH
(a) Inspect the resistance of the main switch.
Orange Paint Standard:
Terminal No. Condition Specified Condition
Free (ON) Below 1
4 -5
Pushed Pushed (OFF) 10 k or higher
HINT:
If the switch does not illuminate, it will not affect the ON/OFF
Bulb function of the switch. For the illumination check, refer to page
75-102 .
Free (ON)
Pushed (OFF)
B68895
NG REPLACE POWER BACK DOOR MAIN SWITCH
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1952
05-1770
DIAGNOSTICS - POWER BACK DOOR SYSTEM
7 CHECK WIRE HARNESS (POWER BACK DOOR MAIN SWITCH - POWER BACK
DOOR ECU)
Wire Harness Side (a) Disconnect the P7 main switch and P13 ECU connectors.
(b) Check the resistance between the wire harness side con-
nectors.
P7 Standard (Check for open circuit):
Power Back Door Main Switch Terminal No. Specified Condition
P7-4 - P13-6 (MSW)
Below 1
P7-5 - P13-5 (MSE)
1 2 3 4 5 6
P13
Power Back Door ECU
NG REPAIR OR REPLACE HARNESS AND
B68444 CONNECTOR
OK
REPLACE POWER BACK DOOR ECU
8 CHECK SWITCH OPERATION
(a) If the power back door does not respond to using the satellite switch, proceed to A.
(b) If the power back door does not respond to using the back door opener switch outside, proceed to B.
B Go to step 11
A
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1953
05-1771
DIAGNOSTICS - POWER BACK DOOR SYSTEM
9 INSPECT SATELLITE SWITCH
Power Back Door (a) Inspect the resistance of the back door switch.
Standard:
Terminal No. Condition Specified Condition
Free 10 k or higher
3 -5
Pushed Below 1
HINT:
If the switch does not illuminate, it will not affect the ON/OFF
function of the switch. For the illumination check, refer to page
B67796
B67763 B68912 75-102 .
NG REPLACE SATELLITE SWITCH
OK
10 CHECK WIRE HARNESS (SATELLITE SWITCH - INSTRUMENT PANEL JUNCTION
BLOCK ASSY (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)
Wire Harness Side (a) Disconnect the S13 switch and the B7 ECU connectors.
(b) Check the resistance between the wire harness side con-
S13 nectors.
Satellite Switch Standard (Check for open circuit):
Terminal No. Specified Condition
S13-3 (HATCH) - B7-2 (PBDS) Below 1
(c) Check the resistance between the S13 switch connector
and body ground.
Standard (Check for open circuit):
B7 Terminal No. Specified Condition
Instrument Panel J/B Assy S13-5 (GND) - Body ground Below 1
(Multiplex Network Body ECU)
B68899
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
Go to step 14
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1954
05-1772
DIAGNOSTICS - POWER BACK DOOR SYSTEM
11 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check the DATA LIST for proper functioning of the back door opener switch
(Outside handle switch).
Standard (Power back door ECU):
Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
ON: Back door opener switch is pushed
DOOR HANDLE SW Back door opener switch signal/ON or OFF -
OFF: Back door opener switch is not pushed
OK Go to step 14
NG
12 INSPECT BACK DOOR OPENER SWITCH ASSY (OUTSIDE HANDLE SWITCH)
(a) Inspect the resistance of the switch.
Standard:
Terminal No. Condition Specified Condition
Free 10 k or higher
1 -2
Pushed Below 1
Pushed
Free B68466
NG REPLACE BACK DOOR OPENER SWITCH
ASSY
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1955
05-1773
DIAGNOSTICS - POWER BACK DOOR SYSTEM
13 CHECK WIRE HARNESS (BACK DOOR OPENER SWITCH ASSY - POWER BACK
DOOR ECU AND GROUND)
Wire Harness Side (a) Disconnect the B12 switch and P13 ECU connectors.
(b) Check the resistance between the wire harness side con-
nectors.
B12
Standard (Check for open circuit):
Back Door Opener Switch Assy
Terminal No. Specified Condition
B12-1 - P13-3 (HSW) Below 1
(c) Check the resistance between the B12 switch connector
and body ground.
Standard (Check for open circuit):
Terminal No. Specified Condition
B12-2 - Body ground Below 1
P13
Power Back Door ECU
NG REPAIR OR REPLACE HARNESS AND
B68456 CONNECTOR
OK
REPLACE POWER BACK DOOR ECU
14 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 17
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1956
05-1774
DIAGNOSTICS - POWER BACK DOOR SYSTEM
15 INSPECT POWER SLIDE DOOR CONTROL SWITCH 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
16 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
Power Back Door Touch Sensor LH
Standard (Check for open circuit):
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
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1957
05-1775
DIAGNOSTICS - POWER BACK DOOR SYSTEM
17 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 20
NG
18 INSPECT POWER SLIDE DOOR WARNING BUZZER 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
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1958
05-1776
DIAGNOSTICS - POWER BACK DOOR SYSTEM
19 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-
P16 nectors.
Power Back Door Touch Sensor RH Standard (Check for open circuit):
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
20 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 pow-
er back door drive unit. If the power back door drive unit operates, the power back door drive unit itself and
the wire harness between the power back door drive unit and power back door ECU are considered to be
functionary 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 Go to step 23
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1959
05-1777
DIAGNOSTICS - POWER BACK DOOR SYSTEM
21 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 : 1960
05-1778
DIAGNOSTICS - POWER BACK DOOR SYSTEM
22 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
23 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check the DATA LIST for proper functioning of the switches listed below.
Standard (Power back door ECU):
Diagnostic
Item Measurement Item/Display (Range) Normal Condition
Note
Back door lock half latch switch signal ON: Back door is not completely closed
HALF LATCH SW -
/ON or OFF OFF: Back door is closed
Back door lock full latch switch signal ON: Back door is opened
FULL LATCH SW -
/ON or OFF OFF: Back door is closed
OK Go to step 26
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1961
05-1779
DIAGNOSTICS - POWER BACK DOOR SYSTEM
24 INSPECT BACK DOOR LOCK ASSY (See page 05-1745 )
NG REPLACE BACK DOOR LOCK ASSY
OK
25 CHECK WIRE HARNESS (BACK DOOR LOCK ASSY) - POWER BACK DOOR
ECU) (See page 05-1745 )
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
26 REPLACE POWER BACK DOOR ECU
(a) Check the power back door for normal OPEN/CLOSE operation.
NG REPLACE INSTRUMENT PANEL JUNCTION
BLOCK ASSY (MULTIPLEX NETWORK BODY
ECU)
OK
SYSTEM NORMAL
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1962
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