Description

Auto leveling sensor circuit malfunction

Detection condition

• Adaptive front lighting system (AFS) control module detected the auto leveling sensor circuit voltage of 0.25 V or less or 4.75 V or more 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

• Adaptive front lighting system (AFS) control module connector or terminal malfunction

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

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

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

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

• Open circuit in wiring harness between the following terminals:

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

• Auto leveling sensor malfunction

• Adaptive front lighting system (AFS) control module malfunction

Step

Inspection

Action

1

• Switch the ignition to off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• 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.

No

Repair or replace the connector, then go to Step 7.

2

• Disconnect the adaptive front lighting system (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.

No

Repair or replace the connector, then go to Step 7.

3

• Verify that the auto leveling sensor and adaptive front lighting system (AFS) control module connectors are disconnected.

• Inspect for continuity between the following terminals (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

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 7.

No

Go to the next step.

4

• Verify that the auto leveling sensor and adaptive front lighting system (AFS) control module connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (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.

No

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 7.

5

• Switch the ignition to off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Verify that the auto leveling sensor and adaptive front lighting system (AFS) control module connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Adaptive front lighting system (AFS) control module terminal I—Auto leveling sensor terminal C

• Adaptive front lighting system (AFS) control module terminal K—Auto leveling sensor terminal B

• Adaptive front lighting system (AFS) control module terminal C—Auto leveling sensor terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 7.

6

• Inspect the auto leveling sensor.

  (See AUTO LEVELING SENSOR INSPECTION.)

• Is the auto leveling sensor normal?

Yes

Go to the next step.

No

Replace the auto leveling sensor, then go to the next step.

(See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)

7

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the adaptive front lighting system (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.

• Retrieve the adaptive front lighting system (AFS) control module DTCs using the M-MDS.

  (See DTC INSPECTION [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the adaptive front lighting system (AFS) control module, then go to the next step.

  (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

8

• 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].)

No

DTC troubleshooting completed.