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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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SECURITY INDICATOR LIGHT: 21, DTC: B13D4:00/P1260:00 [START STOP UNIT]

Description

Insufficient remote transmitter programming number

Detection condition

  • Start stop unit detects that the number of programmed remote transmitters is less than 2.

Fail-safe

Not applicable

Possible cause

  • Insufficient number of remote transmitters programmed

  • Start stop unit malfunction

System wiring diagram

Not applicable

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY NUMBER OF PROGRAMMED REMOTE TRANSMITTER
  • Display PID NUM_TRNSMIT using the M-MDS.

    (See PID/DATA MONITOR INSPECTION [START STOP UNIT].)

  • Is the number of programmed remote transmitters less than 2?

Yes

Perform the additional remote transmitter programming, then go to the next step.

(See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.)

No

Go to the next step.

2

VERIFY THAT REPAIRS HAVE BEEN COMPLETED
  • Clear the DTC for the start stop unit using the M-MDS.

    (See CLEARING DTC [START STOP UNIT].)

  • Retrieve the start stop unit DTCs using the M-MDS.

    (See DTC INSPECTION [START STOP UNIT].)

  • Is the security indicator light: 21, DTC B13D4:00/P1260:00 displayed?

Yes

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

(See START STOP UNIT 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 [START STOP UNIT].)

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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