Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 2011i ciabs2
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05-425
DIAGNOSTICS - ABS WITH EBD SYSTEM 057UO-03
BRAKE WARNING LIGHT CIRCUIT
CIRCUIT DESCRIPTION
If the ECU detects a trouble, it turns on the brake warning light at the same time of prohibiting ABS control.
At this time, the ECU records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the brake warning light blink and output the DTC.
WIRING DIAGRAM
C10 Skid Control ECU
Combination Meter with Actuator
J/C
5 17 19
Y-B Y-B
J8 J7 S3 BRL
14
BRAKE J19 Driver Side J/B
J/C
7 24
W-L W-L W-L
1L 1C
12 34 54
I15 Ignition SW
26 GAUGE2 27
B-R B
1H 1H
32 6 IG2 AM2 5
Engine Room J/B
1 AM2 1 33 J/C 16
W W-R W-R
2D 2H J3 J4
1 2
Short Pin ECU-B 8
W-L
2C
1 2
FL Block
1 1 FL MAIN
W W
F8 F6
Battery
F45118
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 608
05-426
DIAGNOSTICS - ABS WITH EBD SYSTEM
INSPECTION PROCEDURE
1 INSPECT PARKING BRAKE SWITCH CIRCUIT
(a) Check for an open or short circuit in the parking brake switch circuit (See page 01-37 ).
NG REPAIR OR REPLACE PARKING BRAKE
SWITCH CIRCUIT
OK
2 INSPECT BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT
(a) Check the brake fluid level in reservoir.
(b) Check for an open and shot circuit in brake fluid level warning switch circuit (See page 01-37 ).
NG REPAIR OR REPLACE BRAKE FLUID LEVEL
WARNING SWITCH CIRCUIT
OK
3 CHECK DTC ONCE MORE
(a) Check if the other DTCs are detected (See page 05-386 ).
NG REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
OK
4 INSPECT COMBINATION METER ASSY(BRAKE WARNING LIGHT CIRCUIT)
(a) Check for an open or short circuit in the combination meter (See page 01-37 ).
NG REPAIR OR REPLACE COMBINATION METER
ASSY
OK
5 CHECK HARNESS AND CONNECTOR(BRAKE ACTUATOR - COMBINATION
METER)
(a) Check for an open or short circuit in harness and connector between the brake actuator and combina-
tion meter (See page 01-37 ).
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE BRAKE ACTUATOR ASSY (See page 32-43 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 609
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