B2237

PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: B2237: Rear Left Sensor Malfunction

DTC B2237 - Rear Left Sensor Malfunction

DESCRIPTION

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









WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT NO. 1 ULTRASONIC SENSOR




(a) Remove the No. 1 ultrasonic sensor.
(b) Measure the resistance of the sensor.
Standard resistance:





NOTE:
Set the tester to the 100 kOhms range before performing the measurement.

NG -- REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR)
OK -- Continue to next step.

2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 1 ULTRASONIC SENSOR)
(a) Disconnect the A38 ECU connector.




(b) Disconnect the Z1 sensor connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE CLEARANCE WARNING ECU