2003 LEXUS LS430 ignition

Fig. 18: Identifying Steering Sensor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4.STEERING SENSOR
a. Measure the resistance according to the value (s) in the table below.
Standard:
STEERING SENSOR CONNECTOR TERMINALS RESISTANCE
TerminalsWiring ColorConditionSpecified Condition
S16-10 (CANH) - S16-9 (CANL)LG - LIgnition Switch OFF54 to 69 ohms
S16-10 (CANH) - S16-2 (ESS)LG - W-BIgnition Switch OFF1 kohms or more
S16-9 (CANL) - S16-2 (ESS)L - W-BIgnition Switch OFF1 kohms or more
S16-10 (CANH) - S16-3 (BAT)LG - L-YIgnition Switch OFF1 Mohms or more
S16-9 (CANL) - S16-3 (BAT)L - L-YIgnition Switch OFF1 Mohms or more

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

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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

SEAT BELT CONTROL ECU CONNECTOR TERMINALS RESISTANCE
1.COMMUNICATION STOP MODE TABLE
a. Check that there is no open circuit in the CAN main bus line, short between the lines, or short to +B
in the "CHECK CAN BUS LINE" (see CHECK CAN BUS LINE
). Select "BUS CHECK" on the
hand-held tester via the CAN VIM (see DIAGNOSIS SYSTEM
).
b. Check the communication stop mode of the ECUs or sensors not displayed among the following:
"ENGINE", "ECT", "CRUISE CONTROL", "ABS/VSC/TRAC", "YAW/DECELERAT",
"STEERING SENSOR", "BODY/GATEWAY", "BACK GUIDE MONITOR", "PSB" or "AIR
SUSPENSION".
PROBLEM SYMPTOMS
TerminalsWiring ColorConditionSpecified Condition
S63-4 (CANH) - S63-6 (CANL)B - WIgnition Switch OFF54 to 69 ohms
S63-4 (CANH) - S63-18 (GND)B - W-BIgnition Switch OFF1 kohms or more
S63-6 (CANL) - S63-18 (GND)W - W-BIgnition Switch OFF1 kohms or more
S63-4 (CANH) - S63-9 (BATT)B - BIgnition Switch OFF1 Mohms or more
S63-6 (CANL) - S63-9 (BATT)W - BIgnition Switch OFF1 Mohms or more
SymptomInspection ItemCustomizationSee Procedure
"ENGINE" and "ECT" are
not displayed on the hand-
held tester via CAN VIM.ECM
COMMUNICATION
STOP MODEApplicable to all
vehiclesECM
COMMUNICATION
STOP MODE
"ABS/VSCATRAC" is not
displayed on the hand-held
tester via CAN VIM.SKID CONTROL ECU
COMMUNICATION
STOP MODEApplicable to all
vehiclesSKID CONTROL ECU
COMMUNICATION
STOP MODE
"STEERING SENSOR" is
not displayed on the hand-
held tester via CAN VIM.STEERING SENSOR
COMMUNICATION
STOP MODEApplicable to all
vehiclesSTEERING SENSOR
COMMUNICATION
STOP MODE
"YAW/DECELERAT" is
not displayed on the hand-
held tester via CAN VIM.YAW RATE SENSOR
COMMUNICATION
STOP MODEApplicable to all
vehiclesYAW RATE SENSOR
COMMUNICATION
STOP MODE
DISTANCE CONTROL Applicable only to DISTANCE CONTROL

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