
05-488
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM 05CC8-04
DTC C1232/32 MALFUNCTION IN DECELERATION SENSOR
DTC C1234/34 MALFUNCTION IN YAW RATE SENSOR
DTC C1243/43 MALFUNCTION IN DECELERATION SENSOR
DTC C1244/44 OPEN OR SHORT IN DECELERATION
SENSOR CIRCUIT
DTC C1245/45 MALFUNCTION IN DECELERATION SENSOR
DTC C1381/97 MALFUNCTION IN POWER SUPPLY
VOLTAGE YAW/DECELERATION SENSOR
CIRCUIT DESCRIPTION
The yaw rate 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
While vehicle speed becomes 0 km/h (0 mph) from 30 km/h
(18 mph), and the condition that GL1 and GL2 signals of
C1232/32
ECU terminals did not change 40 mV or less continued in a
sequence 16 times.
C1234 / 34 The t lf
Th yaw rate sensor malfunction signal i received
ti i l is i d
While vehicle speed becomes 0 km/h (0 mph) from 30 km/h
(18 mph) or more, the condition that both GL1 and GL2
C1243 / 43
signals of ECU terminals do not change 2 LSB or more
continued in a sequence 16 times.
S Y rate sensor
Yaw t
S With vehicle speed at 0 km/h, after the difference of output
S Yaw rate sensor circuit
absolute value of G conversion value between decelera- S Wire harness
tion sensor terminals GL1 and GL2 becomes 0.6 G or
C1244 / 44
more, and the condition that does not become 0.4 G con-
tinues for 60 sec. or more.
S Deceleration sensor malfunction signal is received.
At the vehicle speed of 30 km/h (18 mph), the acceleration
and deceleration values calculated from the deceleration
C1245 / 45 sensor values and from vehicle speed are different, and the
condition that the difference exceeds 0.35 G continues for
60 sec. or more.
With vehicle speed at 3 km/h or more, malfunction signal of
S Yaw rate sensor
C1381 / 97 deceleration sensor terminal IG1 is received for 10 sec. or
S Yaw rate sensor power source circuit
more.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 671
05-489
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
WIRING DIAGRAM
Y1 Skid Control ECU
J17
Yaw Rate Sensor with Actuator
16 J/C 8 J/C 15 J/C 1 11
B B B B
CANH J32 J31 J6 J5 S3 CANH
3 C C
8 16 1 15 25
W W W W
CANL J32 J31 J6 J5 S3 CANL
2 E E
15 7
B-R B-R
IG J32 J31
5 J42 J/C
GND W-B W-B
1 A A
Driver Side J/B
J18
IG1 Relay
1 ECU-IG 23 J/C
W B-R B-R
1A 1L
5 3 87 8
29 16
B-Y W-B
1H 1L
2 1
I15 Ignition SW
AM1 10
W-L
1H
1 AM1 IG1 2
B-Y
FL Block
1 1 W-B
W
F7 F6
ALT W-B
FL MAIN W
IE BL
Battery
F45126
INSPECTION PROCEDURE
HINT:
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.
1 CHECK SENSOR INSTALLATION(YAW RATE SENSOR)
NG YAW RATE SENSOR IS INSTALLED
CORRECTLY
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 672
05-490
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
2 CHECK TERMINAL VOLTAGE(IG AND GND OF YAW RATE SENSOR
CONNECTOR)
(a) Disconnect the yaw rate sensor connector.
IG (b) Turn the ignition switch ON.
(c) Measure the voltage between terminal IG and GND of the
yaw rate sensor connector.
OK:
Voltage: 10 to 14 V
GND
F45082
OK REPLACE ABS & TRACTION ACTUATOR ASSY
(See page 32-46 )
NG
3 CHECK HARNESS AND CONNECTOR(YAW RATE SENSOR - ECU-IG FUSE, YAW
RATE SENSOR - BODY GROUND)
(a) Check for an open or short circuit in harness and connector between the yaw rate sensor and skid
control ECU (See page 01-37 ).
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE YAW RATE SENSOR
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 673