2003 LEXUS LS430 Identifying ac

Fig. 129: Identifying Skid Control ECU Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
6.INSPECT COMBINATION METER ASSEMBLY (SEE PROBLEM SYMPTOMS TABLE
)
NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
The SLIP indicator blinks during TRAC & VSC operation.
The skid control ECU is connected to the combination meter via CAN and MPX communications.
WIRING DIAGRAM

Fig. 133: Identifying Skid Control ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Standard:
TESTER CONNECTION SPECIFIED CONDITION
c. Measure the resistance accordin
g to the value (s) in the table below.
Tester ConnectionSpecified Condition
S42-30 (BZ) - V7-1 (BZ)Below 1 ohms

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

Fig. 136: Identifying DLC3 Terminals (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

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

Fig. 140: Identifying Skid Control ECU Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)

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