B241A

LIGHTING (EXT): AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM: B241A: Rear Height Control Sensor
B241A - Rear Height Control Sensor

DESCRIPTION

The headlight leveling ECU assembly receives signals indicating the height of the vehicle from the rear height control sensor sub-assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
If either of the following is performed, initialization of the headlight leveling ECU assembly is necessary Automatic Headlight.

* Replacement of the headlight leveling ECU assembly.
* Replacement or removal/installation of the rear height control sensor sub-assembly or work that changes the vehicle height such as replacement of suspension components.

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTCs Automatic Headlight.

(b) Check for DTCs Automatic Headlight.

OK:

DTC B241A is not output.

NG -- READ VALUE USING TECHSTREAM

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / HL Auto Leveling / Data List.

(e) Read the display on the Techstream.

HL Auto Leveling

OK:

Normal conditions listed above are displayed.

NG -- INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

OK -- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Removal

3. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

(a) Remove the rear height control sensor sub-assembly Removal.

(b) Inspect the rear height control sensor sub-assembly Testing and Inspection.

NG -- REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - REAR HEIGHT CONTROL SENSOR)

(a) Disconnect the A34 headlight leveling ECU assembly connector.

(b) Disconnect the O17 rear height control sensor sub-assembly connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Removal