Dtc B2415 Vehicle Speed Sensor Malfunction

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Lighting. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU WITH ACTUATOR)

CHECK AFS ECU

DTC B2415 Vehicle Speed Sensor Malfunction


DESCRIPTION

The AFS ECU receives signals regarding the front wheel speed from the skid control ECU.

DTC No.
DTC Condition Condition
Trouble Area
B2415
  1. Malfunction in skid control ECU
  2. Open or short in vehicle speed sensor circuit
  1. Skid control ECU with actuator
  2. Wire harness or connector
  3. AFS ECU

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System. Dtc B2415 Vehicle Speed Sensor Malfunction


INSPECTION PROCEDURE

1.CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

  1. Check that vehicle stability control system DTCs are not output (Click here).

    Result:

    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
A


2.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU WITH ACTUATOR)


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System. Dtc B2415 Vehicle Speed Sensor Malfunction

  1. Disconnect the A14 skid control ECU with actuator connector.

  1. Disconnect the A28 AFS ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A14-37 (FRO) - A28-7 (SPDR)
    		Always
    		Below 1 Ω
    A14-38 (FLO) - A28-6 (SPDL)
    		Always
    		Below 1 Ω
    A28-7 (SPDR) - Body ground
    		Always
    		10 kΩ or higher
    A28-6 (SPDL) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK AFS ECU


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System. Dtc B2415 Vehicle Speed Sensor Malfunction

  1. Disconnect the A28 AFS ECU connector.



  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Voltage
    A28-6 (SPDL) - Body ground
    		Vehicle is driving at approx. 30 km/h (19 mph)
    		0 to 5 V
    Pulse generation (see waveform 1)
    A28-7 (SPDR) - Body ground
    		Vehicle is driving at approx. 30 km/h (19 mph)
    		0 to 5 V
    Pulse generation (see waveform 1)


      Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System. Dtc B2415 Vehicle Speed Sensor Malfunction

    1. Waveform 1: Oscilloscope wave

      Item
      		Contents
      Tool setting
      		2 V/DIV., 2 ms./DIV.
      Vehicle condition
      		Vehicle is driving at approximately 30 km/h (19 mph)
      OK:
      Waveform is output as shown in the illustration.

      Result:

      Result
      		Proceed to
      OK (When checking from DIAGNOSTIC TROUBLE CODE CHART)
      		A
      OK (When checking from PROBLEM SYMPTOMS TABLE)
      		B
      NG
      		B


B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C
REPLACE BRAKE ACTUATOR ASSEMBLY
A

REPLACE AFS ECU