LEXUS LS430 2003 Factory Repair Manual

8.CONNECT CONNECTOR
a. Reconnect the gateway ECU sub bus line connector (J36) to the D-CAN J/C A side (w/earth
terminal).
9.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM SUB BUS LINE)
Fig. 94: Disconnecting ECM Sub Bus Line Connector (J40) From D
-CAN J/C B Side (W/O Earth
Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the ECM sub bus line connector (J40) from the D-CAN J/C B side (w/o earth terminal).

Fig. 95: 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 20
NG: GO TO NEXT STEP
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

10.CONNECT CONNECTOR
a. Reconnect the ECM sub bus line connector (J40) to the D-CAN J/C B side (w/o earth terminal).
11.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU WITH ACTUATOR
SUB BUS LINE)
Fig. 96: Disconnecting Skid Control ECU Sub Bus Line Connector (J41) From D
-CAN J/C (W/O
Earth Terminal)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the skid control ECU sub bus line connector (J41) from the D-CAN J/C (w/o earth
terminal).

Fig. 97: 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
NG: GO TO NEXT STEP
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

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 LINES FOR SHORT CIRCUIT (STEERING SENSOR SUB BUS LINE)
Fig. 98: Disconnecting Steering Sensor Sub Bus Line Connector (J43) From D
-CAN J/C B Side
(W/O Earth Terminal)
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. 99: 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
NG: GO TO NEXT STEP
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms

14.CONNECT CONNECTOR
a. Reconnect the steering sensor sub bus line connector (J43) to the D-CAN J/C B side (w/o earth
terminal).
15.CHECK CAN BUS LINES FOR SHORT CIRCUIT (D-CAN J/C)
Fig. 100: Disconnecting CAN Main Bus Line Connector (J37) From D
-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 (J37) from the D-CAN J/C A side (w/earth terminal).

Fig. 101: 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)
OK: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (D-CAN J/C - P-CAN
Tester connectionConditionSpecified value
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF108 to 132 ohms

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 LINES FOR SHORT CIRCUIT (SUSPENSION CONTROL ECU SUB BUS
LINE)
Fig. 102: 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
Tester connectionConditionSpecified value

OK: REPLACE SUSPENSION CONTROL ECU (SEE REPLACEMENT )
OK: 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 LINES FOR SHORT CIRCUIT (GATEWAY ECU SUB BUS LINE)
Fig. 103: Identifying DLC3 Connector terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the gateway ECU sub bus line connector (G3).
b. Measure the resistance according to the value (s) in the table below.
Standard:
D1-6 (CANH) - D1-14 (CANL)Ignition Switch OFF54 to 69 ohms