2003 LEXUS LS430 air condition

Fig. 38: Check Can Bus Line For Disconnection
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Disconnect the skid control ECU connector (S42).
c. Measure the resistance according to the value (s) in the table below.
Standard:
SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE SKID CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-
H, CAN-L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (IG, GND1, GND2)
Tester ConnectionConditionSpecified value
S42-11 (GANH) - S42-25 (CANL)Ignition Switch OFF54 to 69 ohms

Fig. 39: Identifying Skid Control ECU Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
b. Measure the voltage according to the value (s) in the table below.
Standard:
SKID CONTROL ECU CONNECTOR TERMINALS VOLTAGE
NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE REPLACEMENT
)
Tester ConnectionConditionSpecified value
S42-1 (GND2) - Body groundAlwaysBelow 1
S42-32 (GND1) - Body groundAlwaysBelow 1
S42-46 (IG1) - Body groundIgnition Switch ON10 to 14 V

a. Turn the ignition switch to the LOCK position.
b. Disconnect the steering sensor connector (S16).
c. Measure the resistance according to the value (s) in the table below.
Standard:
STEERING SENSOR CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H,
CAN -L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (IG1, ESS)
Tester ConnectionConditionSpecified value
S16-10 (CANH) -S16-9 (CANL)Ignition Switch OFF54 to 69 ohms

Fig. 46: Identifying Yaw Rate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Disconnect the yaw rate sensor connector (Y1).
c. Measure the resistance according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H,
CAN-L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (IG, GND)
Tester connectionConditionSpecified value
Y1-2 (CANL) - Y1-3 (CANH)Ignition Switch OFF54 to 69 ohms

Fig. 47: Identifying Yaw Rate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
b. Measure the voltage according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE AND VOLTAGE
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE YAW RATE SENSOR (SEE REPLACEMENT
)
Tester ConnectionConditionSpecified Condition
Y1-1 (GND) - Body groundAlwaysBelow 1 ohms
Y1-5 (IG) - Body groundIgnition Switch ON10 to 14 V

Standard:
DISTANCE CONTROL ECU CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE DISTANCE CONTROL ECU SUB BUS LINE OR CONNECTOR
(CAN-H, CAN-L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (+B, GND)
Tester connectionConditionSpecified value
D2-8 (CANH) - D2-9 (CANL)Ignition Switch OFF54 to 69 ohms

DISTANCE CONTROL ECU CONNECTOR TERMINALS RESISTANCE AND VOLTAGE
NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
OK: REPLACE DISTANCE CONTROL ECU ASSY (SEE REPLACEMENT
)
MODE DESCRIPTION
Fig. 52: Problem Symptom Diagnostic Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Tester ConnectionConditionSpecified Condition
D2-12 (GND) - Body groundAlwaysBelow 1 ohms
D2-1 (+B) - Body groundIgnition Switch ON10 to 14 V

Fig. 54: Disconnecting Television Camera ECU Connector (T24)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Disconnect the television camera ECU connector (T24).
c. Measure the resistance according to the value (s) in the table below.
Standard:
TELEVISION CAMERA ECU CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE TELEVISION CAMERA ECU SUB BUS LINE OR CONNECTOR
(CAN-H, CAN-L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (IG, +B, ACC, GND1)
Tester connectionConditionSpecified value
T24-8 (CANH) - T24-7 (CANL)Ignition Switch OFF54 to 69 ohms