DTC B1044:01 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

id1502b6025700

System malfunction location

Auto leveling sensor circuit malfunction

Detection condition

•  Auto leveling sensor circuit voltage of 0.25 V or less or 4.75 V or more is detected by AFS control module for 10 s or more with the ignition switched ON (engine off or on).

Fail-safe

•  The swivel actuator is moved to the center.

•  The headlight leveling actuator is stopped at the position when the malfunction is determined.

Possible cause

•  Auto leveling sensor connector or terminal malfunction

•  AFS control module connector or terminal malfunction

•  Short to ground in wiring harness between the following terminals:

―  AFS control module terminal I and auto leveling sensor terminal C

―  AFS control module terminal K and auto leveling sensor terminal B

―  AFS control module terminal C and auto leveling sensor terminal A

•  Short to power supply in wiring harness between the following terminals:

―  AFS control module terminal I and auto leveling sensor terminal C

―  AFS control module terminal K and auto leveling sensor terminal B

―  AFS control module terminal C and auto leveling sensor terminal A

•  Open circuit in wiring harness between the following terminals:

―  AFS control module terminal I and auto leveling sensor terminal C

―  AFS control module terminal K and auto leveling sensor terminal B

―  AFS control module terminal C and auto leveling sensor terminal A

•  Auto leveling sensor malfunction

•  AFS control module malfunction

System malfunction location	Auto leveling sensor circuit malfunction
Detection condition	• Auto leveling sensor circuit voltage of 0.25 V or less or 4.75 V or more is detected by AFS control module for 10 s or more with the ignition switched ON (engine off or on).
Fail-safe	• The swivel actuator is moved to the center. • The headlight leveling actuator is stopped at the position when the malfunction is determined.
Possible cause	• Auto leveling sensor connector or terminal malfunction • AFS control module connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ― AFS control module terminal I and auto leveling sensor terminal C ― AFS control module terminal K and auto leveling sensor terminal B ― AFS control module terminal C and auto leveling sensor terminal A • Short to power supply in wiring harness between the following terminals: ― AFS control module terminal I and auto leveling sensor terminal C ― AFS control module terminal K and auto leveling sensor terminal B ― AFS control module terminal C and auto leveling sensor terminal A • Open circuit in wiring harness between the following terminals: ― AFS control module terminal I and auto leveling sensor terminal C ― AFS control module terminal K and auto leveling sensor terminal B ― AFS control module terminal C and auto leveling sensor terminal A • Auto leveling sensor malfunction • AFS control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT AUTO LEVELING SENSOR CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Disconnect the auto leveling sensor connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
1		No	Repair or replace the connector, then go to Step 7.
2	INSPECT AFS CONTROL MODULE CONNECTOR CONDITION • Disconnect the AFS control module connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 7.
3	INSPECT AUTO LEVELING SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the auto leveling sensor and AFS control module connectors are disconnected. • Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground. ― Auto leveling sensor terminal C ― Auto leveling sensor terminal B ― Auto leveling sensor terminal A • Is there continuity?	Yes	Repair or replace the wiring harness which is shorted to ground, then go to Step 7.
3		No	Go to the next step.
4	INSPECT AUTO LEVELING SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the auto leveling sensor and AFS control module connectors are disconnected. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (vehicle wiring harness side). ― Auto leveling sensor terminal C ― Auto leveling sensor terminal B ― Auto leveling sensor terminal A • Is the voltage 0 V?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness which is shorted to power supply, then go to Step 7.
5	INSPECT AUTO LEVELING SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the auto leveling sensor and AFS control module connectors are disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity. ― AFS control module terminal I and auto leveling sensor terminal C ― AFS control module terminal K and auto leveling sensor terminal B ― AFS control module terminal C and auto leveling sensor terminal A • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness which has an open circuit, then go to Step 7.
6	INSPECT AUTO LEVELING SENSOR • Inspect the auto leveling sensor. (See AUTO LEVELING SENSOR INSPECTION.) • Is the auto leveling sensor normal?	Yes	Go to the next step.
6		No	Replace the auto leveling sensor, then go to the next step. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear the AFS control module DTCs using the M-MDS. (See CLEARING DTC [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].) • Switch the ignition ON (engine off or on) and wait for 10 s or more. • Perform the DTC inspection for the AFS control module using the M-MDS. (See DTC INSPECTION [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].) • Is DTC B1044:01 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the AFS control module, then go to the next step. (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].)
8		No	DTC troubleshooting completed.