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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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DTC B10AD:86 [BCM]

Description

Auto wiper control request signal error

Detection condition

  • BCM receives the error signals from the auto light sensor/rain sensor for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

    Auto wiper system

  • Continue the controls prior to the wiper malfunction detection.

Possible cause

  • Auto light sensor/rain sensor malfunction

  • BCM malfunction

System wiring diagram

Not applicable
Diagnostic Procedure

Step

Inspection

Action

1

 VERIFY IF MALFUNCTIONING LOCATION IS AUTO LIGHT SENSOR/RAIN SENSOR DEPENDING ON REPEATABILITY

  • Clear the DTC for the BCM using the M-MDS.

    (See CLEARING DTC [BCM].)

  • Operate the wiper and washer switch to the AUTO position.

  • Switch the ignition ON (engine off or on) and wait for 5 s or more.

  • Retrieve the BCM DTCs using the M-MDS.

    (See DTC INSPECTION [BCM].)

  • Is the same DTC displayed?

Yes

Replace the auto light sensor/rain sensor, then go to the next step.

(See RAIN SENSOR REMOVAL/INSTALLATION.)

No

Go to Step 3.

2

 VERIFY THAT REPAIRS HAVE BEEN COMPLETED

  • Clear the DTC for the BCM using the M-MDS.

    (See CLEARING DTC [BCM].)

  • Operate the wiper and washer switch to the AUTO position.

  • Switch the ignition ON (engine off or on) and wait for 5 s or more.

  • Retrieve the BCM DTCs using the M-MDS.

    (See DTC INSPECTION [BCM].)

  • Is the same DTC displayed?

Yes

Replace the BCM, then go to the next step.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

No

Go to the next step.

3

 VERIFY IF OTHER DTCs DISPLAYED

  • Are any other DTCs displayed?

Yes

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

(See DTC TABLE [BCM].)

No

DTC troubleshooting completed.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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