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DTC U0515:41 [BCM]

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2016 – MX-5 – Body and Accessories

DTC U0515:41 [BCM]

Description

Error signal received from start stop unit

Detection condition

  • Check sum error occurred on communication with the BCM and the start stop unit 3 times continuously with the ignition switched ON (engine off or on).

Fail-safe

    Exterior lighting system

  • Turn the TNS (parking lights) and headlights LO on, and turn off other exterior light controls.

    Auto light system

  • Continue the controls prior to the auto light malfunction detection.

    Wiper system

  • Continue the controls prior to the wiper malfunction detection.

    Washer system

  • Stop the washer control.

    Auto wiper system

  • Continue the controls prior to the wiper malfunction detection.

Possible cause

  • DTCs are stored in the start stop unit.

  • Start stop unit malfunction

  • BCM malfunction

System wiring diagram

Not applicable

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY BCM DTCs AGAIN

Yes

Go to the next step.

No

Go to Step 5.

2

VERIFY START STOP UNIT DTCs

Yes

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

(See DTC TABLE [START STOP UNIT].)

No

Go to the next step.

3

VERIFY IF MALFUNCTIONING LOCATION IS START STOP UNIT DEPENDING ON REPEATABILITY

Yes

Replace the start stop unit, then go to the next step.

(See START STOP UNIT REMOVAL/INSTALLATION.)

No

Go to Step 5.

4

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

Yes

Replace the BCM, then go to the next step.

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

No

Go to the next step.

5

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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