2003 LEXUS LS430 Identifying condition

In AVC-LAN, radio receiver assy becomes the communication master, and the radio receiver assy has enough
resistance necessary for transmitting the communication.
WIRING DIAGRAM
Fig. 88: Identifying Stereo Component Amplifier Assy
- Audio And Rear A/C Control SW Wiring
Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSY - AUDIO
AND REAR A/C CONTROL SW)
a. Disconnect the connector from the stereo component amplifier assy S29 and audio and rear A/C
control SW A35.
b. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
Tester connectionConditionSpecified condition
TX+ - TXD+(1), RTX+(2)AlwaysBelow 1 ohms
TX- - TXD-(1), RTX-(2)AlwaysBelow 1 ohms
TX+ - Body groundAlways10 kohms or higher
TX- - Body groundAlways10 kohms or higher
(1)Mark Levinson Models
(2)Standard Models

WIRING DIAGRAM
Fig. 92: Identifying Radio Receiver Assy
- Gateway ECU Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT RADIO RECEIVER ASSY
a. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CONDITION CHART
Tester connectionConditionSpecified condition
TX+ - TX-Always60 to 80 ohms

Fig. 101: Identifying Shift Lock Control Unit Assembly Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TERMINAL AND SPECIFIED VALUE<
TerminalMeasuring ConditionSpecified Value
4 (E) - Body groundConstantBelow 1 ohms

Fig. 16: Identifying DCL3 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.DLC3
a. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
TerminalsWiring ColorConditionSpecified Condition
D1-6 (CANH) - D1-14 (CANL)B - WIgnition Switch OFF54 to 69 ohms
D1-6 (CANH) - D1-4 (CG)B - W-BIgnition Switch OFF1 kohms or more
D1-14 (CANL) - D1-4 (CG)W - W-BIgnition Switch OFF1 kohms or more
D1-6 (CANH) - D1-16 (BAT)B - BIgnition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-16 (BAT)W - BIgnition Switch OFF1 Mohms or more

Fig. 17: Identifying Skid Control ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.SKID CONTROL ECU
a. Measure the resistance according to the value (s) in the table below.
Standard:
SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE
TerminalsWiring ColorConditionSpecified Condition
S42-11 (CANH) - S42-25 (CANL)BR - YIgnition Switch OFF54 to 69 ohms
S42-11 (CANH) - S42-32 (GND1)BR - W-BIgnition Switch OFF1 kohms or more
S42-25 (CANL) - S42-32 (GND1)Y - W-BIgnition Switch OFF1 kohms or more
S42-11 (CANH) - S42-31 (+BS)BR - BIgnition Switch OFF1 Mohms or more
S42-25 (CANL) - S42-31 (+BS)Y - BIgnition Switch OFF1 Mohms or more

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