DTC U0420:68 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)]


id09021n017500

Description

Error signal received from EPS control module

Detection condition
•  AFS control module received the error signal from the EPS control module for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe function
•  The swivel actuator is moved to the center.
•  Control of the headlight auto leveling system is continued.
Possible cause
•  DTCs are stored in the EPS control module.
•  EPS control module malfunction
•  AFS control module malfunction
System wiring diagram
Not applicable

Diagnostic Procedure

Step

Inspection

Action

1
VERIFY EPS CONTROL MODULE DTCs
•  Retrieve the EPS control module DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
No
Go to the next step.
2
PERFORM DTC INSPECTION AND VERIFY EPS CONTROL MODULE MALFUNCTION
•  Clear the DTC for the AFS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the AFS control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the EPS control module, then go to the next step.
No
Go to Step 4.
3
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear the DTC for the AFS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the AFS control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the AFS control module.
Go to the next step.
No
Go to the next step.
4
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.