Description

Auto leveling control module low power supply voltage input

Detection condition

• Auto leveling control module power supply circuit voltage of 9.8 V or less is detected for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

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

Possible cause

• DTCs are stored in the PCM.

• Battery malfunction

• Generator malfunction

• Auto leveling control module connector or terminal malfunction

• Auto leveling control module power supply circuit malfunction

• Short to ground in wiring harness between METER1 10 A fuse and auto leveling control module terminal N

• METER1 10 A fuse malfunction

• Open circuit in wiring harness between IG1 relay terminal C and auto leveling control module terminal N

• Auto leveling control module malfunction

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the DTC displayed?

Yes

Repair the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

Go to the next step.

2

• Inspect the battery.

  (See BATTERY INSPECTION.)

• Is the battery normal?

Yes

Go to the next step.

No

Recharge or replace the battery, then go to Step 6.

(See BATTERY RECHARGING.)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

3

• Inspect the generator.

  (See GENERATOR INSPECTION [SKYACTIV-G 2.0].)

• Is the generator normal?

Yes

Go to the next step.

No

Replace the generator, then go to Step 6.

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

4

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the auto leveling 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 6.

5

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Display PID VPWR_IG using the M-MDS.

  (See PID/DATA MONITOR INSPECTION [AUTO LEVELING CONTROL MODULE].)

• Is the voltage B+?

Yes

Go to the next step.

No

Inspect the METER1 10 A fuse.

• If the fuse is blown:

• Refer to the wiring diagram and verify whether or not there is a common connector between METER1 10 A fuse and auto leveling control module terminal N.

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.

• Replace the fuse.

• If the fuse is damaged:

• Replace the fuse.

• If the fuse is normal:

• Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and auto leveling control module terminal N.

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 the next step.

6

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the auto leveling control module DTCs using the M-MDS.

  (See CLEARING DTC [AUTO LEVELING CONTROL MODULE].)

• Switch the ignition ON (engine off or on) and wait for 5 s or more.

• Retrieve the auto leveling control module DTCs using the M-MDS.

  (See DTC INSPECTION [AUTO LEVELING CONTROL MODULE].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the auto leveling control module, then go to the next step.

  (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [AUTO LEVELING CONTROL MODULE].)

No

DTC troubleshooting completed.