Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 bcsy cihorn
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DI-677
DIAGNOSTICS - BODY CONTROL SYSTEM
DI8AP-01
Horn circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is in operation, the theft deterrent ECU also sounds the vehicle horn.
When the wireless panic switch is pressed, the Body ECU sounds the vehicle horn.
WIRING DIAGRAM
Body ECU
Engine Room J/B NO.2 (Integration Relay)
HORN RELAY
1
5 3 G-W
2F J18
HORN J/C 17
3 10
1 2 B B
2B 2K I16 PHRN
G-B G-B
B B
W
D
G-B Theft Deterrent ECU
G-B
FL MAIN 12
15
B-L IG2 T4 HORN
G-B
G-W C13
Horn Switch
1 1
Battery H6
H5
Horn
Horn (Low)
(High)
I18890
2001 SIENNA (RM787U)
Author : Date : 831
DI-678
DIAGNOSTICS - BODY CONTROL SYSTEM
INSPECTION PROCEDURE
1 Check horn.
NG Replace the horn.
OK
2 Check wireharness and connector between horn relay and body ECU, battery
and horn relay.
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
DI-636 ).
2001 SIENNA (RM787U)
Author : Date : 832
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