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DTC U0420:68 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

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2016 – MX-5 – i-ACTIVSENSE

DTC U0420:68 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

Description

Error signal received from electric power steering (EPS) control module

Detection condition

  • The adaptive front lighting system (AFS) control module received error signal from the electric power steering (EPS) control module for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

  • The swivel actuator is moved to the center.

  • Control of the headlight auto leveling system is continued.

Possible cause

  • DTCs are stored in the electric power steering (EPS) control module.

  • Electric power steering (EPS) control module malfunction

  • Adaptive front lighting system (AFS) control module malfunction

System wiring diagram

Not applicable

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY ELECTRIC POWER STEERING (EPS) CONTROL MODULE DTCs

Yes

Repair the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [EPS CONTROL MODULE].)

No

Go to the next step.

2

VERIFY IF MALFUNCTIONING LOCATION IS ELECTRIC POWER STEERING (EPS) CONTROL MODULE DEPENDING ON REPEATABILITY

Yes

Replace the electric power steering (EPS) control module, then go to the next step.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

No

Go to Step 4.

3

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

Yes

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.

4

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].)

No

DTC troubleshooting completed.

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