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DTC U0423:68 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

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2016 – MX-5 – i-ACTIVSENSE

DTC U0423:68 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

Description

Error signal received from instrument cluster

  • Ignition switch error signal

  • Selector lever position (R position) (AT)/reverse (MT) signal error

  • Selector lever position (R position) (AT)/reverse (MT) signal not determined

Detection condition

  • Ignition switch error signal

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

  • Selector lever position (R position) (AT)/reverse (MT) signal error

    • The adaptive front lighting system (AFS) control module received selector lever position (R position) (AT)/reverse (MT) signal error for 5 s or more with the ignition switched ON (engine off or on).

  • Selector lever position (R position) (AT)/reverse (MT) signal not determined

    • The adaptive front lighting system (AFS) control module detected undetermined selector lever position (R position) (AT)/reverse (MT) signal.

Fail-safe

  • Ignition switch error signal

    • Control of the adaptive front lighting system (AFS) is continued with the ignition switched ON (engine on).

    • Control of the headlight auto leveling system is continued.

  • Selector lever position (R position) (AT)/reverse (MT) signal error

    • The swivel actuator is moved to the center.

    • Control of the headlight auto leveling system is continued.

  • Selector lever position (R position) (AT)/reverse (MT) signal not determined

    • Control of the swivel actuator is continued with the transmission range switch (AT)/back-up light switch (MT) fixed in the condition when the malfunction is determined.

    • Control of the headlight auto leveling system is continued.

Possible cause

  • DTCs are stored in the instrument cluster.

  • Instrument cluster malfunction

  • Adaptive front lighting system (AFS) control module malfunction

System wiring diagram

Not applicable

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY INSTRUMENT CLUSTER DTCs

Yes

Repair the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

2

VERIFY IF MALFUNCTIONING LOCATION IS INSTRUMENT CLUSTER DEPENDING ON REPEATABILITY

Yes

Replace the instrument cluster, then go to the next step.

(See INSTRUMENT CLUSTER 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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