Identifying condition LEXUS LS430 2003 Factory Repair Manual
Page 1537 of 4500
Fig. 26: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
Ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a pre-amplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic transmission and reception signals to the
clearance warning ECU assy.
Fig. 27: DTC B2233 Detection Condition And Trouble Area Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1539 of 4500
Fig. 29: Identifying Ultrasonic Sensor No.2 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go To Next Step.
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY -
ULTRASONIC SENSOR NO. 2)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Disconnect the U1 connector from ultrasonic sensor No.2.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified value
C17-12 (FCL) - U1-2AlwaysBelow 1 ohms
C17-8 (FGND) - U1-1AlwaysBelow 1 ohms
C17-12 (FCL) - Body groundAlways10 kohms or higher
C17-8 (FGND) - Body groundAlways10 kohms or higher
Page 1541 of 4500
Fig. 30: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
Ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a pre-amplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic transmission and reception signals to the
clearance warning ECU assy.
Fig. 31: DTC B2234 Detection Condition And Trouble Area Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1543 of 4500
Fig. 33: Identifying Ultrasonic Sensor No.2 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go To Next Step.
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY -
ULTRASONIC SENSOR NO. 2)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Disconnect the U4 connector from ultrasonic sensor No.2.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified value
C17-11 (FCR) - U4-2AlwaysBelow 1 ohms
C17-8 (FGND) - U4-1AlwaysBelow 1 ohms
C17-11 (FCR) - Body groundAlways10 kohms or higher
C17-8 (FGND) - Body groundAlways10 kohms or higher
Page 1545 of 4500
Fig. 34: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
Ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a pre-amplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic transmission and reception signals to the
clearance warning ECU assy.
Fig. 35: DTC B2235 Detection Condition And Trouble Area Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1547 of 4500
Fig. 37: Identifying Ultrasonic Sensor No.1 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go To Next Step.
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY -
ULTRASONIC SENSOR NO. 1)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Disconnect the U5 connector from ultrasonic sensor No.1.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified value
C17-10 (FR) - U5-2AlwaysBelow 1 ohms
C17-8 (FGND) - U5-1AlwaysBelow 1 ohms
C17-10 (FR) - Body groundAlways10 kohms or higher
C17-8 (FGND) - Body groundAlways10 kohms or higher
Page 1549 of 4500
Fig. 38: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
Ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a pre-amplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic transmission and reception signals to the
clearance warning ECU assy.
Fig. 39: DTC B2236 Detection Condition And Trouble Area Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1551 of 4500
Fig. 41: Identifying Ultrasonic Sensor No.1 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go To Next Step.
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY -
ULTRASONIC SENSOR NO. 1)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Disconnect the U6 connector from ultrasonic sensor No.1.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified value
C17-9 (FRS) - U6-2AlwaysBelow 1 ohms
C17-8 (FGND) - U6-1AlwaysBelow 1 ohms
C17-9 (FRS) - Body groundAlways10 kohms or higher
C17-8 (FGND) - Body groundAlways10 kohms or higher
Page 1553 of 4500
Fig. 42: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
Ultrasonic sensor consists of a sensor portion that transmits and receives ultrasonic waves and a pre-amplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic transmission and reception signals to the
clearance warning ECU assy.
Fig. 43: DTC B2237 Detection Condition And Trouble Area Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1555 of 4500
Fig. 45: Identifying Ultrasonic Sensor No.1 Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go To Next Step.
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY -
ULTRASONIC SENSOR NO. 1)
a. Disconnect the C17 connector from the clearance warning ECU assy.
b. Disconnect the U9 connector from ultrasonic sensor No.1.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION SPECIFIED CONDITION
Tester connection (Symbols)ConditionSpecified value
C17-25 (RL) - U9-2AlwaysBelow 1 ohms
C17-20 (RGND) - U9-1AlwaysBelow 1 ohms
C17-25 (RL) - Body groundAlways10 kohms or higher
C17-20 (RGND) - Body groundAlways10 kohms or higher