Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 2011i cialways
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05-419
DIAGNOSTICS - ABS WITH EBD SYSTEM 057UM-03
DTC AlwaysON MALFUNCTION IN ABS ECU
CIRCUIT DESCRIPTION
DTC No. DTC Detecting Condition Trouble Area
S Battery
Either of the following 1. or 2. is detected:
S Charging system
Always ON 1. The ECU connectors are OFF from the ECU.
S Power source circuit
2. There is a malfunction in the ECU internal circuit.
S Brake actuator assy
HINT:
There is a case that hand-held tester cannot be used when there is a malfunction in the ECU.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 602
05-420
DIAGNOSTICS - ABS WITH EBD SYSTEM
WIRING DIAGRAM
C10 Skid Control ECU
Combination Meter with Actuator
3 J/C 15 30
R-W R-W
J8 J7 S3 WA
7
ABS B-R
32 J19 J/C
W-L W-L
12 34 54
Drive Side J/B
24 7
1C 1L
I15 27 GAUGE 2 26
B B-R
Ignition SW 1H 1H
IG1 Relay
ECU-IG 6 3
W-R B-R
5 AM2 6 1C S3 IG1
IG2 5 3
29 16
W-L B-Y W-B
1H 1L
1 AM1 IG1 2 2 1
1 AM1 10
W W-L
1A 1H
Engine Room J/B
J/C AM2
16 33 1 1
W-R W-R 2 1 W
J4 J3 2H 2D
8 ECU-B Short Pin
W-L
2C
FL Block 2 1
1 1
W
F6 F8 W
1
W
F7
ALT W-B
1
W-B
S3 GND1
FL MAIN
W-B 23
S3 GND2
Battery IE ED
F45119
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 603
05-421
DIAGNOSTICS - ABS WITH EBD SYSTEM
INSPECTION PROCEDURE
1 RECONFIRM DTC
(a) Check the DTC (See page 05-386 ).
YES REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
NO
2 INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
NO CONNECT CONNECTOR TO ECU
YES
3 INSPECT SKID CONTROL ECU CONNECTOR(IG1 TERMINAL VOLTAGE)
IN CASE OF USING HAND-HELD TESTER:
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the DATA LIST mode on the hand-held tester.
(d) Check the voltage condition, which is output from the ECU and displayed on the hand-held tester.
OK:
"Normal" is displayed.
IN CASE OF NOT USING HAND-HELD TESTER:
GND1 (-) IG1 (+) (a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch ON.
(c) Measure voltage between terminals IG1 and GND1, 2 of
the skid control ECU harness side connector.
OK:
Voltage: 10 to 14 V
GND2 (-) C58919 OK Go to step 5
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 604
05-422
DIAGNOSTICS - ABS WITH EBD SYSTEM
4 INSPECT SKID CONTROL ECU CONNECTOR(GND TERMINAL CONTINUITY)
(a) Measure resistance between terminal GND1, 2 of the
GND1 skid control ECU harness side connector and body
ground.
OK:
Resistance: 1 or less
GND2 C58919
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPAIR HARNESS AND CONNECTOR
5 GO TO COMBINATION METER SYSTEM(ABS WARNING LIGHT)
(a) Disconnect the skid control ECU connector.
GND1 (b) Using service wire, connect terminals WA and GND1, 2
of the skid control ECU harness side connector.
(c) Turn the ignition switch ON.
OK:
ABS warning light goes off.
GND2 WA C58919
NG REPAIR OR REPLACE COMBINATION METER
ASSEMBLY
OK
REPLACE BRAKE ACTUATOR ASSY (See page 32-43 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 605
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