DTC U0401:00 [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)]

id0902g9934900

DESCRIPTION

Communication error with PCM

DETECTION CONDITION

•  AFS control module receives the invalid data from PCM when the ignition is ON.

POSSIBLE CAUSE

•  PCM DTC is stored

•  AFS control module malfunction

DESCRIPTION	Communication error with PCM
DETECTION CONDITION	• AFS control module receives the invalid data from PCM when the ignition is ON.
POSSIBLE CAUSE	• PCM DTC is stored • AFS control module malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	CONFIRM PCM DTC • Perform the DTC Reading Procedure to confirm the PCM DTC. (See ON-BOARD DIAGNOSTIC TEST [LF, L5].) (See ON-BOARD DIAGNOSTIC TEST [ZY, Z6].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [LF, L5].) (See DTC TABLE [ZY, Z6].) (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See DTC TABLE [MZR-CD 2.2].) (See DTC TABLE [MZR 2.0 DISI i-stop].) (See DTC TABLE [L3 Turbo].)
1		No	Go to the next step.
2	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from AFS control module using the M-MDS. (See CLEARING DTC [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)].) • Switch the ignition to ON. • Perform the “DTC INSPECTION” to confirm the AFS DTC. (See DTC INSPECTION [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)].) • Is the same DTC present?	Yes	Replace the AFS control module, then go to the next step. (See AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)].)
3		No	DTC troubleshooting completed.