Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 theft cihaedre
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DI-543
DIAGNOSTICS - THEFT DETERRENT SYSTEM
DI06X-1 1
Headlight Control Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch ON and OFF at intervals.
This switches the headlight control relay ON and OFF, thus flashing the headlights (See the wiring diagram
below).
In this condition, if any of the following operations is done, the Tr in the ECU goes OFF and the headlight
control relay switches OFF, thus stopping the headlights flashing:
(1) Unlock the front LH or RH door with the key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors by the wireless door lock control system.
(4) Wait for approximately 60 seconds.
(5) Push the panic switch of the wireless door lock control system.
WIRING DIAGRAM
THEFT DETERRENT
J/B No.3
J7 ECU
DIODE J/C J9
3 5 16 14 10
R-W R-W E E R-B R-B R-B
EB1 3A 3C IG2 T4 HEAD
1 2 D D
Junction
Connector
7 R/B No. 7 R-L R-L
2 Engine Room J/B No.2
DRL 8
3 4
Relay 2K
2
3
1 2 1
2G
MAIN
7 1
HEAD Relay
J1
R-B J/C 3 2B
R-B W
S
B B B-L
FL MAIN
Battery
I19489
2001 SIENNA (RM787U)
Author : Date : 697
DI-544
DIAGNOSTICS - THEFT DETERRENT SYSTEM
INSPECTION PROCEDURE
HINT:
The flow chart below is based on the premise that the headlights light up normally whenever the light control
switch is operated. If headlight operation is not normal when the light control switch is operated, proceed
to troubleshooting on page BE-2 .
1 Check voltage between terminal HEAD of theft deterrent ECU connector and
body ground.
PREPARATION:
Disconnect the theft deterrent ECU connector.
CHECK:
Measure voltage between terminal HEAD of theft deterrent
ECU connector and body ground.
OK:
Voltage: 10-14V
(+) (-)
HEAD
I01924
NG Check and repair harness and connector be-
tween theft deterrent ECU and headlight control
relay (See page IN-31 ).
OK
Check and replace theft deterrent ECU.
2001 SIENNA (RM787U)
Author : Date : 698
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