B2425

LIGHTING (EXT): LIGHTING SYSTEM: B2424: Headlight Leveling Motor LH Communication Malfunction

DTC B2424 - Headlight Leveling Motor LH Communication Malfunction

DTC B2425 - Headlight Leveling Motor RH Communication Malfunction

DESCRIPTION

The headlight leveling motor operates by receiving a signal from the AFS ECU. The AFS ECU detects the headlight leveling motor status using the signal from the headlight leveling motor.






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 B2424 or B2425 output does not occur.
NG -- READ VALUE USING TECHSTREAM (AFS ECU)
OK -- USE SIMULATION METHOD TO CHECK
2. READ VALUE USING TECHSTREAM (AFS ECU)
(a) Using the Techstream, read the Data List.

AFS





OK:
Power supply voltage is 11 to 14 V.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - BATTERY AND BODY GROUND)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND)




(a) Disconnect the E91 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (AFS ECU - HEADLIGHT)




(a) Disconnect the E91 ECU connector.
(b) Disconnect the A42 and A48 actuator connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

for LH





for RH





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
5. CHECK HEADLIGHT LEVELING MOTOR (OPERATION)
(a) Temporarily replace the headlight with a new or normally functioning one.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B2424 or B2425 output does not occur.
NG -- REPLACE AFS ECU
OK -- END (HEADLIGHT IS DEFECTIVE)