B241B
LIGHTING (EXT): LIGHTING SYSTEM: B241B: Front Height Control Sensor
B241B - Front Height Control Sensor
DESCRIPTION
The AFS ECU (headlight swivel ECU assembly) receives signals indicating the front height of the vehicle from the suspension control ECU.
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 B241B is not output.
NG -- CHECK FOR DTC
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
2. CHECK FOR DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC "C1712/12 Front Height Control Sensor LH Circuit Malfunction" is not output.
NG -- GO TO AIR SUSPENSION SYSTEM Air Suspension System
OK -- Continue to next step.
3. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Body Electrical / AFS / Data List.
(d) Read the display on the Techstream.
AFS
OK:
Normal conditions listed above are displayed.
NG -- CHECK HARNESS AND CONNECTOR (AFS ECU - SUSPENSION CONTROL ECU)
OK -- Continue to next step.
4. REPLACE SUSPENSION CONTROL ECU
(a) Temporarily replace the suspension control ECU with a new or normally functioning one Components.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B241B is not output.
NG -- REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Components
OK -- END
5. CHECK HARNESS AND CONNECTOR (AFS ECU - SUSPENSION CONTROL ECU)
(a) Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.
(b) Disconnect the A55 suspension control 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.
6. REPLACE SUSPENSION CONTROL ECU
(a) Temporarily replace the suspension control ECU with a new or normally functioning one Components.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B241B is not output.
NG -- REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Components
OK -- END