Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 20ahm cic12313
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05-485
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM 05CC7-02
DTC C1231/31 MALFUNCTION IN STEERING ANGLE
SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU through CAN communication system. When
there is malfunction in communication, it will be detected by the diagnosis function.
DTC No. DTC Detecting Condition Trouble Area
S Steering angle sensor
When ECU IG1 terminal voltage is 9.5 V or more, the steer-
C1231 / 31 S Steering angle sensor circuit
ing angle sensor malfunction signal is received.
S Power source circuit
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 668
05-486
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
WIRING DIAGRAM
S9 Skid Control ECU
J18 J17
Steering Sensor with Actuator
J/C J/C 15 J/C 1 11
B-R B-R CANH B B B
J6 J5 S3 CANH
87 5 1 IG1 10 C C
1 15 25
CANL W W W
J19 J6 J5 S3 CANL
9 E E
J/C
W-L W-L ESS W-B W-B
BAT
54 5 3 2 53 42
J20
Driver Side J/B J/C
7 24 W-L
1L 1C
23
B-R
1L
IG1 Relay
1 ECU-IG
W
1A
5 3
29 16
B-Y W-B
1H 1L
2 1
I15 Ignition SW
AM1 10
W-L
1H
1 AM1 IG1 2
B-Y
Engine Room J/B
1 Short Pin ECU-B 8
W W-L
2D 2C
FL Block 1 2
1
F8 W-B
1 ALT 1 FL MAIN
W W
F7 F6
Battery IE IG
F45127
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 669
05-487
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
INSPECTION PROCEDURE
HINT:
S When U0121/94, U0123/62, U0124/95 or U0126/63 are output accompanied with C1210/36 or
C1336/39, inspect and repair the trouble areas indicated by U0121/94, U0123/62, U0124/95 or
U0126/63 first.
S When the speed sensor or the yaw rate sensor has trouble, DTCs for the steering angle sensor may
be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw
rate sensor are output accompanied with other DTCs for the steering angle sensor, inspect and repair
the speed sensor and yaw rate sensor first, and then inspect and repair the steering angle sensor.
1 CHECK TERMINAL VOLTAGE(STEERING ANGLE SENSOR CONNECTOR)
ON (a) Remove the steering wheel and column lower cover.
(-) (+) (b) Disconnect the steering angle sensor connector.
3
(c) Turn the ignition switch ON.
(d) Measure voltage between terminals 1 and 2, 2 and 3 of
the steering angle sensor harness side connector.
OK:
1 Voltage: 10 to 14 V
2
(+) (-) NG REPAIR OR REPLACE HARNESS OR
F45101 CONNECTOR
OK
REPLACE STEERING ANGLE SENSOR
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 670
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