2003 LEXUS LS430 Identifying ac

Fig. 227: 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 22
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more

NG: GO TO NEXT STEP
12.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).
13.CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)
Fig. 228: Identifying Steering Sensor Sub Bus Line Connector (J43)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the steering sensor sub bus line connector (J43) from the D-CAN J/C B side (w/o earth
terminal).

Fig. 229: 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 24
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more

Fig. 231: 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
NG: REPLACE JUNCTION CONNECTOR (D-CAN J/C)
Tester connectionConditionSpecified value
D1-6 (CANH) D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) D1-4 (CG)Ignition Switch OFF1 kohms or more

OK: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (D-CAN J/C - P-CAN
J/C)
16.CONNECT CONNECTOR
a. Reconnect the suspension control ECU sub bus line connector (J38) to the D-CAN J/C A side
(w/earth terminal).
17.CHECK CAN BUS LINE FOR SHORT TO GND (SUSPENSION CONTROL ECU SUB BUS
LINE)
Fig. 232: 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)
18.CONNECT CONNECTOR
a. Reconnect the gateway ECU sub bus line connector (J36) to the D-CAN J/C (w/earth terminal).
19.CHECK CAN BUS LINE FOR SHORT TO GND (GATEWAY ECU SUB BUS LINE)
Fig. 233: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the gateway ECU connector (G3).
b. Measure the resistance according to the value (s) in the table below.
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more

Standard:
DLC3 CONNECTOR TERMINALS RESISTANCE
OK: REPLACE GATEWAY ECU
NG: REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H,
CAN-L)
20.CONNECT CONNECTOR
a. Reconnect the ECM sub bus line connector (J40) to the D-CAN J/C B side (w/o earth terminal).
21.CHECK CAN BUS LINE FOR SHORT TO GND (ECM SUB BUS LINE)
Fig. 234: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)Ignition Switch OFF1 kohms or more

Fig. 235: 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
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)
24.CONNECT CONNECTOR
Tester connectionConditionSpecified value
D1-6 (CANH) D1-4 (CG)Ignition Switch OFF1 kohms or more
D1-14 (CANL) D1-4 (CG)Ignition Switch OFF1 kohms or more