Park Assist Monitoring. Dtc B2241 Rear Right Sensor Malfunction

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20

Park Assist Monitoring. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT NO. 1 ULTRASONIC SENSOR

CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 1 ULTRASONIC SENSOR)

DTC B2241 Rear Right Sensor Malfunction

DESCRIPTION

The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper.
The clearance warning ECU detects obstacles based on signals received from the rear right sensor. If the rear right sensor's circuit has an open, short or other malfunction, it will not function normally.

Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.
Dtc
B2241 Rear Right Sensor Malfunction

DTC No.	DTC Detection Condition	Trouble Area
B2241	Malfunction of No. 1 ultrasonic sensor (Rear right sensor)	No. 1 ultrasonic sensor Wire harness Clearance warning ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1.INSPECT NO. 1 ULTRASONIC SENSOR

Remove the ultrasonic sensor.

Measure the resistance of the sensor.
Standard resistance:
Tester Connection
Condition
Specified Condition
S (S2-2) - E (S2-1)
Always
600 to 1,200 kΩ
NOTICE:
Set the tester to the 100 kΩ range before performing the measurement.

REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR)

OK

2.CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 1 ULTRASONIC SENSOR)

Disconnect the Q37 ECU connector.

Disconnect the S2 sensor connector.

Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection	Condition	Specified Condition
S5 (Q37-2) - S (S2-2)	Always	Below 1 Ω
E5 (Q37-15) - E (S2-1)	Always	Below 1 Ω
S5 (Q37-2) - Body ground	Always	10 kΩ or higher
E5 (Q37-15) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE CLEARANCE WARNING ECU