Dtc B2416 Height Control Sensor Malfunction

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Lighting. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER

CHECK WIRE HARNESS (FRONT HEIGHT CONTROL SENSOR CIRCUIT)

CHECK WIRE HARNESS (REAR HEIGHT CONTROL SENSOR CIRCUIT)

CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR FRONT)

CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR REAR)

INSPECT HEIGHT CONTROL SENSOR (FRONT LH)

INSPECT HEIGHT CONTROL SENSOR (REAR LH)

CHECK AFS ECU

CHECK AFS ECU

DTC B2416 Height Control Sensor Malfunction


DESCRIPTION

The AFS ECU receives signals regarding the height of the front/rear of the vehicle from the height control sensor.

DTC No.
DTC Detection Condition
Trouble Area
B2416
  1. Malfunction in height control sensor
  2. Open or short in vehicle height sensor circuit
  1. Wire harness or connector
  2. AFS ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester main switch on.

  1. Select the items below in the Data List, and read the displays on the intelligent tester.

    AFS ECU:

    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    Fr Height Sens
    		Front height sensor signal value / 0 to 5 V
    		Approx. 2.5 V
    		-
    Rr Height Sens
    		Rear height sensor signal value / 0 to 5 V
    		Approx. 2.5 V
    		-
    OK:
    Condition sign can be displayed.

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


B
REPAIR OR REPLACE HARNESS AND CONNECTOR

C
Go to step 2
A

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK WIRE HARNESS (FRONT HEIGHT CONTROL SENSOR CIRCUIT)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Disconnect the A21 height control sensor connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A21-1(SHG) - A21-3(SHB)
    		Engine switch on (IG)
    		4.5 to 5.5 V


NG
Go to step 8
OK


Go to step 2

3.CHECK WIRE HARNESS (REAR HEIGHT CONTROL SENSOR CIRCUIT)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Disconnect the o2 height control sensor connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    o2-1(SHG) - o2-3(SHB)
    		Engine switch on (IG)
    		4.5 to 5.5 V


NG
Go to step 9
OK


4.CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR FRONT)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Disconnect the A21 height control sensor connector.

  1. Disconnect the A30 AFS ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A30-2 (SHFL) - A21-2 (SHFL)
    		Always
    		Below 1 Ω
    A30-2 (SHFL) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK WIRE HARNESS (AFS ECU - HEIGHT CONTROL SENSOR REAR)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Disconnect the o2 sensor connector.

  1. Disconnect the A31 AFS ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A31-9 (SHRL) - o2-2 (SHFL)
    		Always
    		Below 1 Ω
    A31-9 (SHRL) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.INSPECT HEIGHT CONTROL SENSOR (FRONT LH)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Connect the 3 dry cell batteries (1.5 V) in series.

  1. Remove the height control sensor assembly front.

  1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead from the battery to terminal 3.

  1. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2 (SHFL) - 1 (SHG)
    		+45°
    		Approx. 4.5 V
    2 (SHFL) - 1 (SHG)
    		0° (Normal)
    		Approx. 2.5 V
    2 (SHFL) - 1 (SHG)
    		-45° (Low)
    		Approx. 0.5 V


NG
REPLACE HEIGHT CONTROL SENSOR (FRONT LH)
OK


7.INSPECT HEIGHT CONTROL SENSOR (REAR LH)
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Connect the 3 dry cell batteries (1.5 V) in series.

  1. Remove the height control sensor assembly rear.

  1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead from the battery to terminal 3.

  1. Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2 (SHFL) - 1 (SHG)
    		+45°
    		Approx. 4.5 V
    2 (SHFL) - 1 (SHG)
    		0° (Normal)
    		Approx. 2.5 V
    2 (SHFL) - 1 (SHG)
    		-45° (Low)
    		Approx. 0.5 V
    Result
    OK (When checking from DIAGNOSTICS TROUBLE CODE CHART)
    		A
    OK (When checking from PROBLEM SYMPTOMS TABLE)
    		B
    NG
    		C


B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C
REPLACE HEIGHT CONTROL SENSOR (REAR LH)
A

REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR FRONT)

8.CHECK AFS ECU
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A30-1 (SBF) - A30-17 (SGF)
    		Engine switch on (IG)
    		4.5 to 5.5 V

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


B
REPLACE AFS ECU

C
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A

REPAIR OR REPLACE HARNESS AND CONNECTOR

9.CHECK AFS ECU
Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System. Dtc B2416 Height Control Sensor Malfunction

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A31-10 (SBR) - A31-20 (SGR)
    		Engine switch on (IG)
    		4.5 to 5.5 V

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


B
REPLACE AFS ECU

C
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A

REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - HEIGHT CONTROL SENSOR REAR)