B2416

LIGHTING (EXT): LIGHTING SYSTEM: B2416: Height Control Sensor Malfunction
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 sensors.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Data List.

(e) Read the display on the Techstream.

AFS (AFS ECU)





OK:

Condition sign can be displayed.

Result:





C -- CHECK HARNESS AND CONNECTOR (FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH CIRCUIT)

B -- REPLACE AFS ECU Components

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

1. CHECK HARNESS AND CONNECTOR (FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH CIRCUIT)

(a) Disconnect the A17 front height control sensor sub-assembly LH connector.





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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH CIRCUIT)

(a) Disconnect the Y2 rear height control sensor sub-assembly LH connector.





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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

(a) Disconnect the A28 AFS ECU connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

(a) Disconnect the Y2 rear height control sensor sub-assembly LH connector.





(b) Disconnect the A27 AFS ECU connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

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





(b) Remove the front height control sensor sub-assembly LH.

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

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

Standard Voltage:





Text in Illustration





NG -- REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH
OK -- Continue to next step.

6. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

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





(b) Remove the rear height control sensor sub-assembly LH.

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

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

Standard Voltage:





Text in Illustration





NG -- REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

OK -- REPLACE AFS ECU Components

1. CHECK HARNESS AND CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

(a) Disconnect the A17 front height control sensor sub-assembly connector.





(b) Disconnect the A28 AFS ECU connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

OK -- REPLACE AFS ECU Components

1. CHECK HARNESS AND CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

(a) Disconnect the Y2 rear height control sensor sub-assembly LH connector.





(b) Disconnect the A27 AFS ECU connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

OK -- REPLACE AFS ECU Components