2003 LEXUS LS430 replacement

STEERING SENSOR CONNECTOR TERMINALS RESISTANCE
OK: REPLACE STEERING SENSOR (SEE REPLACEMENT
)
NG: REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H,
CNA-L)
26.CONNECT CONNECTOR
a. Reconnect the CAN main bus line connector (J45) to the P-CAN J/C A side (w/earth terminal).
27.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS
LINE)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

LINE)
Fig. 150: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the distance control ECU connector (D2).
b. Measure the resistance according to the value (s) in the table below.
Standard:
DISTANCE CONTROL ECU CONNECTOR TERMINALS RESISTANCE
OK: REPLACE DISTANCE CONTROL ECU ASSY (SEE REPLACEMENT
)
NG: REPAIR OR REPLACE DISTANCE CONTROL ECU SUB BUS LINE OR CONNECTOR
(CAN-H, CAN-L)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

32.CONNECT CONNECTOR
a. Reconnect the yaw rate sensor sub bus line connector (J44) to the P-CAN J/C A side (w/earth
terminal).
33.CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE)
Fig. 151: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the yaw rate sensor connector (Y1).
b. Measure the resistance according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE
OK: REPLACE YAW RATE SENSOR (SEE REPLACEMENT
)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

15.CHECK CAN BUS LINE FOR SHORT TO +B (SUSPENSION CONTROL ECU SUB BUS LINE)
Fig. 169: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the suspension control ECU connector (A20).
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: REPLACE SUSPENSION CONTROL ECU (SEE REPLACEMENT
)
NG: REPAIR OR REPLACE SUSPENSION CONTROL ECU SUB BUS LINE OR CONNECTOR
(CAN-H, CAN-L)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more

OK: REPLACE ECM (SEE REPLACEMENT)
NG: REPAIR OR REPLACE ECM SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
20.CONNECT CONNECTOR
a. Reconnect the skid control ECU sub bus line connector (J41) to the D-CAN J/C B side (w/o earth
terminal).
21.CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU SUB BUS LINE)
Fig. 172: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the skid control ECU connector (S42).
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more

OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE REPLACEMENT )
NG: REPAIR OR REPLACE SKID CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-
H, CAN-L)
22.CONNECT CONNECTOR
a. Reconnect the steering sensor sub bus line connector (J43) to the D-CAN J/C B side (w/o earth
terminal).
23.CHECK CAN BUS LINE FOR SHORT TO +B (STEERING SENSOR SUB BUS LINE)
Fig. 173: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the steering sensor connector (S16).
b. Measure the resistance according to the value (s) in the table below.
Standard:
D1 -14 (CANL) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more

DLC3 CONNECTOR TERMINALS RESISTANCE
OK: REPLACE STEERING SENSOR (SEE REPLACEMENT
)
NG: REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H,
CAN-L)
24.CONNECT CONNECTOR
a. Reconnect the CAN main bus line connector (J45) to the P-CAN J/C A side (w/earth terminal).
25.CHECK CAN BUS LINE FOR SHORT TO +B (CAN BUSES TO LUG-CAN J/C)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more

31.CHECK CAN BUS LINE FOR SHORT TO +B (DISTANCE CONTROL ECU SUB BUS LINE)
Fig. 180: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the distance control ECU connector (D2).
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE DISTANCE CONTROL ECU SUB BUS LINE OR CONNECTOR
(CAN-H, CAN-L)
OK: REPLACE DISTANCE CONTROL ECU ASSY (SEE REPLACEMENT
)
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more