Description

AFS control module low power supply voltage input

Detection condition

• AFS control module power supply circuit voltage of 9.8 V or less is detected for 10 s or more with the ignition switched ON (engine off or on).

Fail-safe function

• Control of the AFS is continued.

• 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

• AFS control module connector or terminal malfunction

• AFS control module power supply circuit malfunction

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

• METER1 10 A fuse malfunction

• Open circuit in wiring harness between IG1 relay and AFS control module terminal A

• AFS control module malfunction

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

2

• Inspect the battery.

  (See BATTERY INSPECTION [SKYACTIV-G 2.5].)

• Is the battery normal?

Yes

Go to the next step.

No

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

(See BATTERY RECHARGING [SKYACTIV-G 2.5].)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

3

• Inspect the generator.

  (See GENERATOR INSPECTION [i-ELOOP].)

  (See GENERATOR INSPECTION [SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)

• Is the generator normal?

Yes

Go to the next step.

No

Replace the generator, then go to Step 6.

(See GENERATOR REMOVAL/INSTALLATION [i-ELOOP].)

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)

4

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• 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.

No

Repair or replace the connector, then go to Step 6.

5

• Always reconnect all disconnected connectors.

• Reconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Display PID VPWR_IG using the M-MDS.

  (See PID/DATA MONITOR INSPECTION [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)].)

• Is the voltage B+?

Yes

Go to the next step.

No

Inspect the METER1 10 A fuse.

• If the fuse is burnt out:

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

• 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 and AFS control module 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 the next step.

6

• Always reconnect all disconnected connectors.

• Reconnect the disconnected negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Clear the DTC for the AFS control module using the M-MDS.

  (See CLEARING DTC [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)].)

• Switch the ignition ON (engine off or on) and wait for 10 s or more.

• Retrieve the AFS control module DTCs using the M-MDS.

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

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the AFS control module.

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

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)].)

No

DTC troubleshooting completed.