LEXUS LS430 2003 Factory Repair Manual

NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H,
CAN-L)
18.CONNECT CONNECTOR
a. Reconnect the ECM sub bus line connector (J40) to the D-CAN J/C B side (w/o earth terminal).
19.CHECK CAN BUS LINE FOR SHORT TO +B (ECM SUB BUS LINE)
Fig. 171: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the ECM connector (E3).
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
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

Fig. 174: Disconnecting CAN Main Bus Line Connector (J49) From LUG-CAN J/C A Side
(W/Earth Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the CAN main bus line connector (J49) from the LUG-CAN J/C A side (w/earth
terminal).

Fig. 175: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: Go to step 34
NG: GO TO NEXT STEP
26.CONNECT CONNECTOR
a. Reconnect the CAN main bus line connector (J49) to the LUG-CAN J/C A side (w/earth terminal).
27.CHECK CAN BUS LINE FOR SHORT TO +B (DISTANCE CONTROL ECU SUB BUS LINE)
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

Fig. 176: Disconnecting Distance Control ECU Sub Bus Line Connector (J48) From P-CAN J/C B
Side (W/O Earth Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the distance control ECU sub bus line connector (J48) from the P-CAN J/C B side (w/o
earth terminal).

Fig. 177: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: Go to step 30
NG: GO TO NEXT STEP
28.CONNECT CONNECTOR
a. Reconnect the distance control ECU sub bus line connector (J48) to the P-CAN J/C B side (w/o
earth terminal).
29.CHECK CAN BUS LINE FOR SHORT TO +B (YAW RATE SENSOR SUB BUS LINE)
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

Fig. 178: Disconnecting Yaw Rate Sensor Sub Bus Line Connector (J44) From P-CAN J/C A Side
(W/Earth Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the yaw rate sensor sub bus line connector (J44) from the P-CAN J/C A side (w/earth
terminal).

Fig. 179: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Measure the resistance according to the value (s) in the table below.
Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: Go to step 32
NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (P-CAN J/C - LUG-CAN
J/C)
30.CONNECT CONNECTOR
a. Reconnect the distance control ECU sub bus line connector (J48) to the P-CAN J/C B side (w/earth
terminal).
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