Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20vj2 cikeyloc
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05-161 1
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM 05BZ0-01
KEY LOCK-IN PREVENTION FUNCTION DOES NOT WORK
PROPERLY (MANUAL OPERATION AND OPERATION
INTERLOCKED WITH KEY ARE ACTIVE)
CIRCUIT DESCRIPTION
The un-lock warning switch turns ON when the key is inserted in the ignition key cylinder. The courtesy lamp
switch turns ON when the driver side door is opened. These 2 switches are monitored by the body ECU.
In order to prevent the key from being locked in, the body ECU controls door locking operation according
to the conditions of these switches so that the doors are not locked.
WIRING DIAGRAM
Instrument Panel J/B Assy
D7 J18 Multiplex Network Body ECU
Front Door Courtesy Lamp Switch Assy J/C
(Driver Side) J/C
22 6 14
1 R-Y R-Y 58 48 R-Y
J12 J11 B9 DCTY
K4
Un-lock Warning Switch Assy
21
1 2 L-B 80 70 L-B
B6 KSW
W-B 21 1
W-B
IE
B67771
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1794
05-1612
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
INSPECTION PROCEDURE
1 INSPECT FUSE (ECU-B)
(a) Inspect the ECU-B fuse (See page 68-1 ).
NG REPLACE FUSE
OK
2 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check that the un-lock warning switch signal is output when the switch
is operated.
Standard (Multiplex network body ECU):
Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
ON: Key is in ignition key cylinder
KEY UNLK WRN SW Un-lock warning switch signal/ON or OFF -
OFF: No key is in ignition key cylinder
OK Go to step 5
NG
3 INSPECT UN-LOCK WARNING SWITCH ASSY
(a) Remove the un-lock warning switch.
Free (b) Inspect the resistance of the switch.
Standard:
Terminal No. Condition Specified Condition
Pushed Free
10 k or higher
(Key removed)
1 -2
Pushed
Below 1
(Key set)
B62710 NG REPLACE UN-LOCK WARNING SWITCH ASSY
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1795
05-1613
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
4 CHECK WIRE HARNESS (UN-LOCK WARNING SWITCH ASSY - INSTRUMENT
PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU))
Wire Harness Side (a) Disconnect the K4 switch and B6 body ECU connectors.
(b) Check the resistance between the wire harness side con-
K4
Un-lock Warning Switch Assy
nectors.
Standard (Check for open circuit):
Terminal No. Specified Condition
K4-2 - B6-21 (KSW)
Below 1
K4-1 - Body ground
B6
Instrument Panel J/B Assy
(Multiplex Network Body ECU)
B64723 NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
5 READ VALUE OF HAND-HELD TESTER
(a) Using the hand-held tester, check that the driver side door courtesy lamp switch signal is output when
the switch is operated.
Standard (Multiplex network body ECU):
Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
Driver side door courtesy lamp switch signal/ ON: Driver side door is open
D DOR CTY SW -
ON or OFF OFF: Driver side door is closed
OK REPLACE INSTRUMENT PANEL JUNCTION
BLOCK ASSY (MULTIPLEX NETWORK BODY
ECU)
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1796
05-1614
DIAGNOSTICS - POWER DOOR LOCK CONTROL SYSTEM
6 INSPECT FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIVER SIDE)
(a) Remove the courtesy lamp switch.
Free (b) Inspect the resistance of the switch.
Standard:
Pushed
Terminal No. Condition Specified Condition
Free Below 1
1 - Body ground
Pushed 10 k or higher
Body Ground
B58556 NG REPLACE FRONT DOOR COURTESY LAMP
SWITCH ASSY
OK
7 CHECK WIRE HARNESS (FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIV-
ER SIDE) - INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NET-
WORK BODY ECU))
Wire Harness Side (a) Disconnect the D7 switch and B9 body ECU connectors.
(b) Check the resistance between the wire harness side con-
D7 nectors.
Front Door Courtesy Lamp Switch Assy Standard (Check for open circuit):
(Driver Side)
Terminal No. Specified Condition
D7-1 - B9-14 (DCTY) Below 1
1
B65420
B9
Instrument Panel J/B Assy
(Multiplex Network Body ECU)
B68878
B68921 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 : 1797
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