Identifying condition LEXUS LS430 2003 Factory Repair Manual

Fig. 19: Identifying Yaw Rate Sensor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.YAW RATE SENSOR
a. Measure the resistance according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE
TerminalsWiring ColorConditionSpecified Condition
Y1-3 (CANH) - Y1-2 (CANL)BR - YIgnition Switch OFF54 to 69 ohms
Y1-3 (CANH) - Y1-1 (GND)BR - W-BIgnition Switch OFF1 kohms or more
Y1-2 (CANL) - Y1-1 (GND)Y - W-BIgnition Switch OFF1 kohms or more
Y1-3 (CANH) - D1-16 (BAT)BR - BIgnition Switch OFF1 Mohms or more
Y1-2 (CANL) - D1-16 (BAT)Y - BIgnition Switch OFF1 Mohms or more

6.DISTANCE CONTROL ECU
a. Measure the resistance according to the value (s) in the table below.
Standard:
DISTANCE CONTROL ECU CONNECTOR TERMINALS RESISTANCE
Fig. 21: Identifying Television Camera ECU Connector Terminals

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7.TELEVISION CAMERA ECU
a. Measure the resistance according to the value (s) in the table below.
Standard:
TerminalsWiring ColorConditionSpecified Condition
D2-8 (CANH) - D2-9 (CANL)LG - LIgnition Switch OFF54 to 69 ohms
D2-8 (CANH) - D2-12 (GND)LG - BRIgnition Switch OFF1 kohms or more
D2-9 (CANL) - D2-12 (GND)L - BRIgnition Switch OFF1 kohms or more
D2-8 (CANH) - D1-16 (BAT)LG - BIgnition Switch OFF1 Mohms or more
D2-9 (CANL) - D1-16 (BAT)L- BIgnition Switch OFF1 Mohms or more

TELEVISION CAMERA ECU CONNECTOR TERMINALS RESISTANCE
Fig. 22: Identifying ECM Connector Terminals

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8.ECM
a. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
TerminalsWiring ColorConditionSpecified Condition
T24-8 (CANH) - T24-7 (CANL)LG - LIgnition Switch OFF54 to 69 ohms
T24-8 (CANH) - T25-8 (GND1)LG - W-BIgnition Switch OFF1 kohms or more
T24-7 (CANL) - T25-8 (GND1)L - W-BIgnition Switch OFF1 kohms or more
T24-8 (CANH) - T25-1 (+B)LG - RIgnition Switch OFF1 Mohms or more
T24-7 (CANL) - T25-1 (+B)L - RIgnition Switch OFF1 Mohms or more
TerminalsWiring ColorConditionSpecified Condition
E3-25 (CANH) - E3-24 (CANL)R- WIgnition Switch OFF54 to 69 ohms
E3-25 (CANH) - E3-2 (EC)R - W-BIgnition Switch OFF1 kohms or more
E3-24 (CANL) - E3-2 (EC)W - W-BIgnition Switch OFF1 kohms or more

Standard:
Fig. 23: Identifying Gateway ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
9.GATEWAY ECU
a. Measure the resistance according to the value (s) in the table below.
GATEWAY ECU CONNECTOR TERMINALS RESISTANCE
E3-25 (CANH) - E3-4 (BATT)R - B-RIgnition Switch OFF1 Mohms or more
E3-24 (CANL) - E3-4 (BATT)W - B-RIgnition Switch OFF1 Mohms or more
TerminalsWiring ColorConditionSpecified Condition
G3-17 (CA1H) - G3-18 (CA1L)LG - LIgnition Switch OFF54 to 69 ohms
G3-17 (CA1H) - G3-24 (GND)LG - W-BIgnition Switch OFF1 kohms or more
G3-18 (CA1L) - G3-24 (GND)L - W-BIgnition Switch OFF1 kohms or more
G3-17 (CA1H) - G3-10 (BATT)LG - L-YIgnition Switch OFF1 Mohms or more
G3-18 (CA1L) - G3-10 (BATT)L - L-YIgnition Switch OFF1 Mohms or more

10.SUSPENSION CONTROL ECU
a. Measure the resistance according to the value (s) in the table below.
Standard:
SUSPENSION CONTROL ECU CONNECTOR TERMINALS RESISTANCE
Fig. 25: Identifying Seat Belt Control ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
11.SEAT BELT CONTROL ECU
a. Measure the resistance according to the value (s) in the table below.
Standard:
TerminalsWiring ColorConditionSpecified Condition
A20-7 (CANH) - A20-8 (CANL)BR - YIgnition Switch OFF54 to 69 ohms
A20-7 (CANH) - A20-4 (GND)BR - W-BIgnition Switch OFF1 kohms or more
A20-8 (CANL) - A20-4 (GND)Y - W-BIgnition Switch OFF1 kohms or more
A20-7 (CANH) - D1-16 (BAT)BR - BIgnition Switch OFF1 Mohms or more
A20-8 (CANL) - D1-16 (BAT)Y - BIgnition Switch OFF1 Mohms or more

Fig. 33: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
Tester connectionConditionSpecified valueResult
D1-6 (CANH) - D1-14
(CANL)Ignition Switch
OFF54 to 69 ohmsOK
D1-6 (CANH) - D1-14
(CANL)Ignition Switch
OFF69 ohms or more (w/o LEXUS Navigation
system)NG-A
D1-6 (CANH) - D1-14
(CANL)Ignition Switch
OFF69 ohms or more (w/ LEXUS Navigation
System)NG-B
D1-6 (CANH) - D1-14
(CANL)Ignition Switch
OFF54 ohms or less (w/o LEXUS Navigation
System)NG-C

Fig. 35: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
HINT:
NG-A: w/o LEXUS Navigation System.
NG-B: w/ LEXUS Navigation System.
NG-A: CHECK CAN BUS LINE FOR SHORT TO GND (W/O LEXUS NAVIGATION SYSTEM)
Tester ConnectionConditionSpecified value
D1-4 (CG) - D1-6 (CANH)Ignition Switch OFF1 kohms or more
D1-4 (CG) - D1-14 (CANL)Ignition Switch OFF1 kohms or more

Fig. 39: Identifying Skid Control ECU Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
b. Measure the voltage according to the value (s) in the table below.
Standard:
SKID CONTROL ECU CONNECTOR TERMINALS VOLTAGE
NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE REPLACEMENT
)
Tester ConnectionConditionSpecified value
S42-1 (GND2) - Body groundAlwaysBelow 1
S42-32 (GND1) - Body groundAlwaysBelow 1
S42-46 (IG1) - Body groundIgnition Switch ON10 to 14 V

Fig. 46: Identifying Yaw Rate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Turn the ignition switch to the LOCK position.
b. Disconnect the yaw rate sensor connector (Y1).
c. Measure the resistance according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE
NG: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H,
CAN-L)
OK: GO TO NEXT STEP
2.CHECK WIRE HARNESS (IG, GND)
Tester connectionConditionSpecified value
Y1-2 (CANL) - Y1-3 (CANH)Ignition Switch OFF54 to 69 ohms

Fig. 47: Identifying Yaw Rate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
b. Measure the voltage according to the value (s) in the table below.
Standard:
YAW RATE SENSOR CONNECTOR TERMINALS RESISTANCE AND VOLTAGE
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE YAW RATE SENSOR (SEE REPLACEMENT
)
Tester ConnectionConditionSpecified Condition
Y1-1 (GND) - Body groundAlwaysBelow 1 ohms
Y1-5 (IG) - Body groundIgnition Switch ON10 to 14 V