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Home >> Mazda >> 2021 >> CX-3 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (On-Board Diagnostic - Adaptive Front Lighting System Control Module) >> DTC B10A4-87: Communication Error With Swivel Actuator (RH) >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.
Step Inspection Action
1 INSPECT FRONT COMBINATION LIGHT (RH) CONNECTOR CONDITION 
  • Switch the ignition to off.
  • Disconnect the negative battery cable.

    (Refer to 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 AFS CONTROL MODULE CONNECTOR CONDITION 
  • 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 7.
3 INSPECT SWIVEL ACTUATOR (RH) CIRCUIT FOR SHORT TO GROUND 
  • Verify that the front combination light (RH) and AFS control module connectors are disconnected.
  • Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
    • Front combination light (RH) terminal K
    • Front combination light (RH) terminal J
  • Is there continuity?
Yes Repair or replace the wiring harness which is shorted to ground, then 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 AFS control module connectors are disconnected.
  • Connect the negative battery cable.

    (Refer to NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)

  • Switch the ignition ON (engine off or on).
  • Measure the voltage at the following terminals (vehicle 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 Repair or replace the wiring harness which is shorted to power supply, then go to Step 7.
5 INSPECT SWIVEL ACTUATOR (RH) CIRCUIT FOR OPEN CIRCUIT 
  • Verify that the front combination light (RH) and AFS control module connectors are disconnected.
  • Switch the ignition to off.
  • Disconnect the negative battery cable.

    (Refer to NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)

  • Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity.
    • AFS control module terminal AC and front combination light (RH) terminal K
    • AFS control module terminal Y and front combination light (RH) terminal J
  • Is there continuity?
Yes Go to the next step.
No Repair or replace the wiring harness which has an open circuit, then go to Step 7.
6 PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS SWIVEL ACTUATOR (RH)  Yes Replace the front combination light (RH), then go to the next step.
(Refer to 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.
(Refer to DTC TABLE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] .)
No DTC troubleshooting completed.