Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20vff ciigniti
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05-1870
DIAGNOSTICS - THEFT DETERRENT SYSTEM 05BA3-02
IGNITION SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ON position, battery positive voltage is applied to terminal IG of the
multiplex network body ECU.
WIRING DIAGRAM
Instrument Panel J/B Assy
Multiplex Network
1 Body ECU
W
1A
IG1 Relay
10 AM1
W-L ECU-IG
1H IG
I15 5 3 15
Ignition Switch Assy
1 F7 29
B-Y
1H
1 AM1 IG1 2 2 1
ALT
FL Block
16
W-B
1L
1 F6
W
Main
Battery
IE
B89162
INSPECTION PROCEDURE
1 INSPECT FUSE (ECU-IG, AM1)
(a) Remove the ECU-IG and AM1 fuses from the instrument panel J/B.
(b) Check the resistance.
Standard: Below 1
NG REPLACE FUSE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2053
05-1871
DIAGNOSTICS - THEFT DETERRENT SYSTEM
2 INSPECT RELAY (IG1)
(a) Remove the IG1 relay from the instrument panel J/B.
1 (b) Check the operation of the IG1 relay.
5
Standard:
5 3 Terminal No. Specified Condition
10 k or higher
3-5 Below 1
2 1 (When battery voltage is applied to terminals 1 and 2)
3 2
B68834 NG REPLACE RELAY
OK
3 INSPECT IGNITION OR STARTER SWITCH ASSY
(a) Check the switch resistance.
ACC
Standard:
LOCK ON
Terminal No. Switch Position Specified Condition
1-3 ACC
START 1-2
1-3 ON
5-6 Below 1
1-2
5-4 START
B67054
5-6
NG REPLACE IGNITION OR STARTER SWITCH
ASSY
OK
4 CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK
BODY ECU) (POWER SOURCE)
Wire Harness Side (a) Disconnect the 1A J/B connector.
1A (b) Check the voltage between the wire harness side con-
Instrument Panel J/B Assy nector and the body ground.
Standard:
Terminal No. Condition Specified Condition
1A-1 (IG) - Body ground Ignition switch ON 10 to 14 V
NG REPAIR OR REPLACE HARNESS AND
B67853 CONNECTOR
OK
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2054
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