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05-1622
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM 05BZ2-02
ONLY BACK DOOR CAN NOT BE OPENED (UNLOCKED) (W/O
POWER BACK DOOR)
CIRCUIT DESCRIPTION
The signal for manual locking/unlocking operation of the driver/passenger side door and the signal for lock-
ing/unlocking operation interlocked with the driver side door key cylinder are sent to the body ECU. The ON
signal of the back door opener switch, which is output when the switch is pressed, is sent to the body ECU.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1805
05-1623
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
WIRING DIAGRAM
Instrument Panel J/B Assy
D9
Power Window Regulator Master Switch Assy
Multiplex Network Body ECU
(Door Control Switch) 7 25
LOCK
5 R-Y R-Y 9
IA2 1K L1
W-B 1
9 22
8 G G 12
D10 UNLOCK IA2 1K UL1
Door Control Switch Assy (Passenger Side)
3 3
LOCK
6 R-Y R-Y
IM1 1J
W-B 3
5 4
5 G G
UNLOCK IM1 1J
D11 J18
Front Door w/ Motor Lock Assy LH 5 J/C 26
9 LG LG 94 84 LG 10
IA1 1K L2
W-B 7
7 5
10 L L
IA1 1J
D12
Front Door w/ Motor Lock Assy RH 4
W-B 6 LG LG
IM1
W-B 8
6 8
W-B 5 L-Y L-Y
IM2 B9 UL3
1 IA1 2 IM2
4
W-B W-B B7 UL2
J/C
IE IG 13 26 10 25
G-W G-W
BG1 J14 J13 B7 BCTY
2 32 16 1
L-B L-B
BG1 J14 J13 B6 TR+
J/C
12 7 23 3
G-B G-B
BG1 J14 J13 B7 BDSU
B12
Back Door Opener Switch Assy
G-B 1 2 W-B
B11
Back Door Lock Assy A J41
L-B 3 1 W-B A J/C
A
G-W 6 5 W-B
BN
B69850
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1806
05-1624
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST USING HAND-HELD TESTER
(a) Select the ACTIVE TEST and then check that the power door lock operates.
HINT:
During the ACTIVE TEST, the hand-held tester sends a signal to the body ECU to drive all the power door
lock motors. If all the power door locks operate, the power door lock motors and the wire harness between
the power door lock motors and body ECU are considered to be functioning normally.
Standard (Multiplex network body ECU):
Item Test Details Diagnostic Note
Operate door lock motor for all doors OFF/LOCK/
DOOR LOCK -
UNLOCK
OK REPLACE INSTRUMENT PANEL JUNCTION
BLOCK ASSY (MULTIPLEX NETWORK BODY
ECU)
NG
2 INSPECT BACK DOOR LOCK ASSY
(a) Check operation of the door lock.
(1) Using a screwdriver, push the latch in order to put
the back door lock in the locked condition (full-latch
position).
(2) Connect the battery positive (+) lead to terminal 3
and the negative (-) lead to terminal 1. Then, check
operation of the latch.
Standard: The latch turns to the open-latch position
(3) Inspect motor operation when battery voltage is ap-
plied to the terminals.
Standard:
Measurement Condition Specified Condition
Battery positive (+) Terminal 3
Clockwise Motor in normal rotation
Full-latch Battery negative (-) Terminal 1
(b) Inspect the resistance of the courtesy switch.
Standard:
Open-latch Door Lock Latch Position Terminal No. Specified Condition
Open-latch position Below 1
5 -6
B68434 Full-latch position 10 k or higher
NG REPLACE BACK DOOR LOCK ASSY
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1807
05-1625
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
3 CHECK WIRE HARNESS (BACK DOOR LOCK ASSY - INSTRUMENT PANEL
JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU) AND BODY
GROUND)
Wire Harness Side
(a) Disconnect the B11 lock, B6 and B7 ECU connectors.
(b) Check the resistance between the wire harness side con-
B11 nectors.
Back Door Lock Assy Standard (Check for open circuit):
Terminal No. Specified Condition
B11-3 - B6-1 (TR+)
Below 1
B11-6 - B7-25 (BCTY)
(c) Check the resistance between the B11 lock connector
and body ground.
Standard (Check for open circuit):
Terminal No. Specified Condition
B6 B11-1 - Body ground
Instrument Panel J/B Assy Below 1
B11-5 - Body ground
(Multiplex Network Body ECU)
B68435
B7
Instrument Panel J/B Assy
(Multiplex Network Body ECU)
B68878 NG REPAIR OR REPLACE HARNESS AND
B68922
CONNECTOR
OK
4 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.
Standard (Power back door ECU):
Diagnostic
Item Measurement Item/Display (Range) Normal Condition
Note
Back door opener switch signal ON: Back door opener switch is pushed
B DOR OPEN SW -
/ON or OFF OFF: Back door opener switch is not pushed
OK REPLACE INSTRUMENT PANEL JUNCTION
BLOCK ASSY (MULTIPLEX NETWORK BODY
ECU)
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1808
05-1626
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
5 INSPECT BACK DOOR OPENER SWITCH ASSY
(a) Remove the back door opener switch.
(b) 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
6 CHECK WIRE HARNESS (BACK DOOR OPENER SWITCH ASSY - INSTRUMENT
PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU))
Wire Harness Side (a) Disconnect the B12 switch and B7 ECU connectors.
(b) Check the resistance between the wire harness side con-
B12 nectors.
Back Door Opener Switch Standard (Check for open circuit):
Terminal No. Specified Condition
B12-1 - B7-3 (DBSU) Below 1
(c) Check the resistance between the B12 lock connector
and body ground.
Standard (Check for open circuit):
B68436
B7 Terminal No. Specified Condition
Instrument Panel J/B Assy B12-2 - Body ground Below 1
(Multiplex Network Body ECU)
B68878
B68923 NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1809
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