DTC    B2233    Front Left Center Sensor Malfunction

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DESCRIPTION

The No. 3 ultrasonic sensor (front left center sensor) is installed on the front bumper.
The clearance warning ECU detects obstacles based on signals received from the front left center sensor. If the front left center sensor's circuit has an open, short or other malfunction, it will not function normally.

E108068E01


DTC No.
DTC Detection Condition
Trouble Area
B2233
Malfunction of No. 3 ultrasonic sensor (Front left center sensor)
  1. No. 3 ultrasonic sensor
  2. Wire harness
  3. Clearance warning ECU

WIRING DIAGRAM


E107567E06


INSPECTION PROCEDURE

1.INSPECT NO. 3 ULTRASONIC SENSOR


    E107562E01

  1. Remove the No. 3 ultrasonic sensor.

  1. Measure the resistance of the sensor.

    Standard resistance:
    Tester Connection
    [tester (+) - tester (-)]
    		Condition
    		Specified Condition
    3 (S) - 2 (E)
    		Always
    		40 +- 10 kΩ
    2 (E) - 3 (S)
    		Always
    		40 +- 10 kΩ
    1 (T) - 2 (E)
    *1
    		Always
    		330 +- 100 kΩ
    2 (E) - 1 (T)
    *1
    		Always
    		1 MΩ or higher

    NOTICE:
    1. Set the tester to the 100 kΩ range before performing the measurement.
    2. *1: Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again.



NG
REPLACE NO. 3 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR)
OK


2.CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 3 ULTRASONIC SENSOR)
E107571E07

  1. Disconnect the A40 ECU connector.

  1. Disconnect the D4 sensor connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A40-5 (S3) - D4 - 3 (S)
    		Always
    		Below 1 Ω
    A40-6 (T3) - D4-1 (T)
    		Always
    		Below 1 Ω
    A40-14 (EF) - D4-3 (E)
    		Always
    		Below 1 Ω
    A40-5 (S3) - Body ground
    		Always
    		1 MΩ or higher
    A40-6 (T3) - Body ground
    		Always
    		1 MΩ or higher
    A40-14 (EF) - Body ground
    		Always
    		1 MΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE CLEARANCE WARNING ECU