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

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SECURITY INDICATOR LIGHT: 13, DTC: B13D3:05/P1260:00 [START STOP UNIT]

Description	Remote transmitter program error
Detection condition	Start stop unit detects a remote transmitter program error.
Fail-safe	Not applicable
Possible cause	Push button start connector or terminal malfunction Start stop unit connector or terminal malfunction Remote transmitter program error Remote transmitter malfunction Start stop unit malfunction NOTE: If any of the following items are touching or near the remote transmitter, signal communication between the remote transmitter and the vehicle is negatively affected, resulting in the engine not starting. Spare keys Keys for other vehicles equipped with an immobilizer system Any metallic object Any electronic device, or any credit or other card with magnetic strips Radio wave outputting device nearby
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PUSH BUTTON START CONNECTOR CONDITION Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Disconnect the push button start 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 4.
2	INSPECT START STOP UNIT CONNECTOR CONDITION Disconnect the start stop unit 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 4.
3	VERIFY IF MALFUNCTIONING LOCATION IS REMOTE TRANSMITTER DEPENDING ON REPEATABILITY Always reconnect all disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) Re-program key ID number of the remote transmitter. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.) Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) Is the security indicator light: 13, DTC B13D3:05/P1260:00 displayed?	Yes	Replace the remote transmitter, then go to the next step. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.)
		No	Go to Step 5.
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) Re-program key ID number of the remote transmitter. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.) Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) Is the security indicator light: 13, DTC B13D3:05/P1260:00 displayed?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the start stop unit. (See START STOP UNIT REMOVAL/INSTALLATION.) Go to the next step.
		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 [START STOP UNIT].)
		No	DTC troubleshooting completed.

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