sensor LEXUS LS430 2003 Factory Repair Manual

Fig. 170: Installing Yawrate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
42.INSTALL FLOOR CARPET ASSY FRONT
43.INSTALL FLOOR SHIFT ASSY (SEE OVERHAUL
)
44.INSTALL FLOOR SHIFT GEAR SHIFTING ROD SUB-ASSY (SEE OVERHAUL
)
45.INSTALL FRONT FLOOR HEAT INSULATOR NO.1 (SEE REPLACEMENT
)
46.INSTALL EXHAUST PIPE ASSY (SEE REPLACEMENT
)
47.INSTALL OXYGEN SENSOR (SEE REPLACEMENT
)
48.INSTALL CONSOLE BOX DUCT NO.1 (SEE REPLACEMENT
)
49.INSTALL CONSOLE BOX (SEE REPLACEMENT
)
50.INSTALL REAR CONSOLE ARMREST ASSY (SEE REPLACEMENT
)
51.INSTALL CONSOLE BOX CARPET
52.INSTALL CONSOLE UPPER REAR PANEL SUB-ASSY (SEE REPLACEMENT
)
53.INSTALL INSTRUMENT PANEL CUP HOLDER ASSY (SEE REPLACEMENT
)
54.INSTALL CONSOLE PANEL SUB-ASSY UPPER (SEE REPLACEMENT
)
55.INSTALL SHIFT LEVER KNOB SUB-ASSY (SEE REPLACEMENT
)
56.INSTALL RADIO RECEIVER ASSY W/BRACKET (SEE REPLACEMENT
)

73.INSPECT PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT )
74.ADJUST PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT
)
75.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
76.INSTALL INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1 (SEE REPLACEMENT
)
77.INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSY NO.1 (SEE REPLACEMENT
)
78.INSTALL OUTER MIRROR SWITCH ASSY
79.INSTALL COIN BOX ASSY
80.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.1 (SEE REPLACEMENT
)
81.INSTALL INSTRUMENT CLUSTER FINISH PANEL CENTER LOWER
82.INSTALL INSTRUMENT CLUSTER FINISH PANEL END
83.CONNECT BATTERY NEGATIVE TERMINAL
84.INSPECT SRS WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
85.CHECK FOR EXHAUST GAS LEAKS
86.PERFORM YAWRATE SENSOR ZERO POINT CALIBRATION (SEE CALIBRATION
)
87.PERFORM INITIALIZATION (SEE INITIALIZATION
)
COMPONENTS

Fig. 180: Disconnecting Parking Brake Cable Assy No.3 From Parking Brake Shoe Lever
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.REMOVE OXYGEN SENSOR (SEE REPLACEMENT
)
9.REMOVE EXHAUST PIPE ASSY (SEE REPLACEMENT
)
10.REMOVE FRONT FLOOR HEAT INSULATOR NO.1 (SEE REPLACEMENT
)
11.REMOVE PARKING BRAKE CABLE ASSY NO.3
a. Remove the 2 nuts and parking brake cable assy No.3 from the rear axle carrier.

j.INSTALL REAR WHEEL
Torque: 103 N.m (1,050 kgf.cm, 76 ft.lbf)
k.INSTALL FRONT FLOOR HEAT INSULATOR NO.1 (SEE REPLACEMENT
)
l.INSTALL EXHAUST PIPE ASSY (SEE REPLACEMENT
)
m.INSTALL OXYGEN SENSOR (SEE REPLACEMENT
)
n.SETTLING PARKING BRAKE SHOES AND DISC
a. Drive the vehicle at approximately 50 km/h (31 mph) on a safe, level and dry road.
b. Depress the parking brake pedal with a force of 150 N (15 kgf.cm, 34 lbf).
c. Drive the vehicle for approximately 400 meters (0.25 mile) in this condition.
d. Repeat this procedure 2 or 3 times.
o.CHECK PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT
)
p.ADJUST PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT
)
COMPONENTS

Fig. 8: Wiring Diagram - Can Communication System (W/O LEXUS Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
The position of the terminus circuit differs in vehicles with and without the LEXUS navigation system.
The skid control ECU with actuator detects and stores steering sensor and yaw rate sensor DTCs and
performs DTC communication by receiving information from the steering sensor and yaw rate sensor.
The ECM detects and stores distance control ECU DTCs, and performs DTC communication by
receiving information from the distance control ECU.
The ECM uses the CAN communication system to perform DTC communication instead of the

conventional communication line (SIL).
1.BRIEF DESCRIPTION
a. The CAN (Controller Area Network) is a serial data communication system for real time
application. It is a multiplex communication system equipped for a vehicle and has a high
communication speed (500 kbps) and the function to detect malfunctions.
b. By pairing the CANH and CANL bus lines, the CAN performs communication based on
differential voltage.
c. Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating
with each other.
d. The CAN has two resistors of 120 ohms which are necessary to communicate with the main bus
line.
2.DEFINITION OF TERMS
a. Main bus line
1. The main bus line is the wire harness between the two terminus circuits on the bus
(communication line). This is the main bus in the CAN communication system.
b. Sub bus line
1. The sub bus line is the wire harness which diverges from the main bus line to the ECU or
sensor.
c. Terminus circuit
1. The terminus circuit is a circuit which is placed to convert communication current of the
CAN communication into bus voltage. It consists of a resistor and condenser. Two terminus
circuits are necessary on a bus.
d. CAN J/C
1. The CAN J/C is a junction designed for CAN communication, which stores a terminus
circuit.
3.ECUs OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION
SYSTEM
a. Skid Control ECU with Actuator
b. Yaw Rate Sensor
c. Steering Sensor
d. Television Camera ECU
e. Seat Belt Control ECU
f. Distance Control ECU
g. Suspension Control ECU
h. ECM
i. Gateway ECU
4.DIAGNOSTIC CODE FOR CAN COMMUNICATION SYSTEM
a. DTCs for the CAN communication system are as follows:

U0073, U0100, U0101, U0122, U0123, U0124, U0126, U0132, U0145, U1101
5.REMARK FOR TROUBLESHOOTING
a. Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there
is a wire break other than in the sub bus line of the DLC3).
b. DTCs regarding the CAN communication system can be checked using the hand-held tester via the
CAN VIM.
c. The CAN communication system cannot detect trouble in the sub bus line of the DLC3 even
though the DLC3 is also connected to the CAN communication system.
6.HOW TO DISTINGUISH THE CAN J/C CONNECTOR
a. In the CAN communication system, the shape of all connectors connected to the CAN J/C is the
same. The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines
and the connecting side of the connector.
HINT:
See TERMINALS OF ECU
for bus line color or the type of connecting surface.
1.CHECK AND CLEAR DTCs
2.CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT ADOPT CAN
COMMUNICATION)
a. Check which of the following is adopted: LEXUS Navigation System, dynamic radar/laser cruise
control, and electronic modulated air suspension (see DIAGNOSIS SYSTEM
).
3.(SEE CHECK CAN BUS LINE
)
4.CHECK HAND-HELD TESTER VIA CAN VIM
a. Select "BUS CHECK" (see DIAGNOSIS SYSTEM
).
Standard: All ECUs and sensors connected to the CAN communication system are displayed.

NO: COMMUNICATION STOP MODE TABLE (SEE PROBLEM SYMPTOMS TABLE )
YES: GO TO NEXT STEP
5.DTC COMBINATION TABLE (SEE DIAGNOSTIC TROUBLE CODE CHART
)
a. Confirm trouble according to the combination of output DTCs regarding the CAN communication
system.
HINT:
Previous CAN communication system DTCs may be the cause if CAN communication system DTCs are
output and all ECUs and sensors connected to the CAN communication system are displayed on the hand-
held tester's "BUS CHECK" screen via the CAN VIM.
6.CIRCUIT INSPECTION
7.IDENTIFICATION OF PROBLEM
8.REPAIR OR REPLACE
9.CONFIRMATION TEST
END

1.JUNCTION CONNECTOR (D-CAN J/C, P-CAN J/C, LUG CAN J/C).
a. D-CAN J/C.
HINT:
The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines
and the connecting side of the connector.
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D-CAN JUNCTION CONNECTORS COLORS DETAIL
D-CAN JUNCTION CONNECTORS COLORS DETAIL
HINT:
D-CAN J/C connectors (A side, w/earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Suspension control ECU (1)BRY
Gateway ECULGL
CAN main bus line (bus line to connect D-CAN J/C and P-
CAN J/C)BW
(1)w/ Electronic Modulated Air Suspension.
D-CAN J/C connectors (B side, w/o earth terminal)Color (CAN-H Side)Color (CAN-L Side)
DLC3BW
Steering sensorLGL
Skid control ECUBRY
ECMRW

b. P-CAN J/C.
HINT:
The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines
and the connecting side of the connector.
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5100030057004b00480003005600440050004800030056004c[de.
P-CAN JUNCTION CONNECTORS COLOR DETAIL
P-CAN JUNCTION CONNECTORS COLOR DETAIL
HINT:
P-CAN J/C connectors (A side, w/earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Yaw rate sensorBRY
CAN main bus line (bus line to connect P-CAN J/C and D-
CAN J/C)BW
P-CAN J/C connectors (B side, w/o earth terminal)Color (CAN-H
Side)Color (CAN-L
Side)
Distance control ECU (1)LGL
CAN main bus line (bus line to connect P-CAN J/C and
LUG-CAN J/C)
(2)BW
(1)w/ Dynamic Radar/Laser Cruise Control.
(2)w/ LEXUS Navigation System.