LEXUS LS430 2003 Factory Repair Manual
Page 191 of 4500
Fig. 135: Identifying DLC3 Terminals (1 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
2.CHECK CAN COMMUNICATION SYSTEM
a. Is the DTC output for CAN communication system?
Result:
DTC OUTPUT DESCRIPTION
B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE DIAGNOSTIC TROUBLE CODE
CHART )
A: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
DTC is not outputA
DTC is outputB
Page 192 of 4500
3.INSPECT HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)
a. Disconnect the slid control ECU connector.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
c. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Tester ConnectionSpecified Condition
D1-13 (TC) - E2-3 (TC)Below 1 ohms
Tester ConnectionSpecified Condition
D1-13 (TC) - Body ground1 Mohms or higher
Page 193 of 4500
Fig. 136: Identifying DLC3 Terminals (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 194 of 4500
OK: Go to next step
4.INSPECT HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
a. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Fig. 137: Identifying DLC3 Terminals (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
5.CHECK CAN COMMUNICATION SYSTEM
a. Is the DTC output for CAN communication s
ystem?
Tester ConnectionSpecified Condition
D1-4 (CG) - Body ground)Below 1 ohms
Page 195 of 4500
Result:
DTC OUTPUT DESCRIPTION
B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE DIAGNOSTIC TROUBLE CODE
CHART )
A: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
In the sensor check mode, a malfunction of the speed sensor that cannot be detected when the vehicle is stopped
is detected while driving.
Transition to the sensor check mode can be performed by connecting terminals TS and CG of the DLC3 and
turning the ignition switch from off to the ON position.
WIRING DIAGRAM
DTC is not outputA
DTC is outputB
Page 196 of 4500
Fig. 138: TS And CG Terminal Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT DLC3 TERMINAL VOLTAGE (TS TERMINAL)
a. Turn the ignition switch to the ON position.
b. Measure the voltage according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
NG: Go to step 3
Tester ConnectionSpecified Condition
D1-12 (TS) - D1-4 (CG)10 to 14 V
Page 197 of 4500
Fig. 139: Identifying DLC3 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
2.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
a. Disconnect the skid control ECU connector.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
c. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
Tester ConnectionSpecified Condition
S42-24 (TS) - D1-12 (TS)Below 1 ohms
Page 198 of 4500
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Tester ConnectionSpecified Condition
S42-24 (TS) - Body ground1 Mohms or higher
Page 199 of 4500
Fig. 140: Identifying Skid Control ECU Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
Page 200 of 4500
3.CHECK HARNESS AND CONNECTOR (BODY GROUND - DLC3)
a. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Fig. 141: Identifying DLC3 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - DLC3)
Tester ConnectionSpecified Condition
D1-4 (CG) - Body groundBelow 1 ohms