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DTC B10A4:87 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

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2016 – MX-5 – i-ACTIVSENSE

DTC B10A4:87 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE]

Description

Communication error with swivel actuator (RH)

Detection condition

  • Adaptive front lighting system (AFS) control module could not receive the signal from the swivel actuator (RH) for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

  • The swivel actuator (RH) is stopped at the position when the malfunction is determined.

  • The swivel actuator (LH) is moved to the center, or the swivel actuators (LH) and (RH) are moved to the center.

  • Control of the headlight auto leveling system is continued with the headlight leveling actuator positioned −0.6° from where the malfunction is determined.

Possible cause

  • Front combination light (RH) 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 D—Front combination light (RH) terminal K

    • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

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

    • Adaptive front lighting system (AFS) control module terminal D—Front combination light (RH) terminal K

    • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

  • Open circuit in wiring harness between the following terminals:

    • Adaptive front lighting system (AFS) control module terminal D—Front combination light (RH) terminal K

    • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

  • Swivel actuator (RH) malfunction

  • Adaptive front lighting system (AFS) control module malfunction

Diagnostic Procedure

Step

Inspection

Action

1

INSPECT FRONT COMBINATION LIGHT (RH) CONNECTOR CONDITION

  • Switch the ignition to off.

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Disconnect the front combination light (RH) 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

INSPECT ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE CONNECTOR CONDITION

  • 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

INSPECT SWIVEL ACTUATOR (RH) CIRCUIT FOR SHORT TO GROUND

  • Verify that the front combination light (RH) and adaptive front lighting system (AFS) control module connectors are disconnected.

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

    • Front combination light (RH) terminal K

    • Front combination light (RH) terminal J

  • 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 D—Front combination light (RH) terminal K

  • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

    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

INSPECT SWIVEL ACTUATOR (RH) CIRCUIT FOR SHORT TO POWER SUPPLY

  • Verify that the front combination light (RH) 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):

    • Front combination light (RH) terminal K

    • Front combination light (RH) terminal J

  • 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 D—Front combination light (RH) terminal K

  • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

    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

INSPECT SWIVEL ACTUATOR (RH) CIRCUIT FOR OPEN CIRCUIT

  • Switch the ignition to off.

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Verify that the front combination light (RH) 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 D—Front combination light (RH) terminal K

    • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

  • 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 D—Front combination light (RH) terminal K

  • Adaptive front lighting system (AFS) control module terminal F—Front combination light (RH) terminal J

    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

VERIFY IF MALFUNCTIONING LOCATION IS SWIVEL ACTUATOR (RH) DEPENDING ON REPEATABILITY

Yes

Replace the front combination light (RH), then go to the next step.

(See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.)

No

Go to Step 8.

7

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

Yes

Repeat the inspection from Step 1.

No

Go to the next step.

8

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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