B241A
LIGHTING (EXT): LIGHTING 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 RH.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
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 RH
OK -- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Components
3. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH
(a) Connect 3 dry cell batteries (1.5 V) in series.
(b) Remove the rear height control sensor sub-assembly RH Components.
(c) Connect the positive (+) lead from the batteries to terminal 3 (SHB) and the negative (-) lead from the batteries to terminal 1 (SHG).
(d) Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down.
Standard Voltage:
Text in Illustration
NG -- REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Components
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - HEIGHT CONTROL SENSOR)
(a) Disconnect the A48 headlight leveling ECU assembly connector.
(b) Disconnect the S3 rear height control sensor sub-assembly RH 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 Components