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sprinkles08
sprinkles08, ASE Certified Technician
Category: Mazda
Satisfied Customers: 22807
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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I have a 2006 Mazda3 S and I swapped the motor now it will

Customer Question

I have a 2006 Mazda3 S and I swapped the motor now it will crank but wont start the security light is on.
JA: Does the light flash, blink or stay solid? Have you tried to reset the security system?
Customer: It blinks rapidly when I try to start it, no I havent tried im not sure how to do it.
JA: Are you fixing your Mazda3 yourself? What have you tried so far?
Customer: Yes im working on it myself My mechanic says its the security that keeping it from running
JA: Anything else you want the mechanic to know before I connect you?
Customer: The motor is from a 2004 my car is an 06 not sure if that makes a difference.
Submitted: 9 months ago.
Category: Mazda
Expert:  david craig replied 9 months ago.

Hi Im David. did you also swap out the computer?

Expert:  david craig replied 9 months ago.

hello??????

Expert:  david craig replied 9 months ago.

do you still need assistance????????

Expert:  sprinkles08 replied 8 months ago.

Hello and welcome to JustAnswer!

A different year engine wouldn't cause security issue but if you replaced the engine controller for some reason that would explain the issue as it would be from another vehicle with incorrect VIN and security data for this vehicle. Was the PCM replaced for some reason?

Customer: replied 8 months ago.
Same Pcm as before
Expert:  sprinkles08 replied 8 months ago.

Do you have a second key?

Customer: replied 8 months ago.
I have one key do I need to get another?
Expert:  sprinkles08 replied 8 months ago.

Is it a transponder key and has been used to operate the vehicle previously?

Customer: replied 8 months ago.
I drove the car before the motor went, im not sure about the key how do I tell?
Expert:  sprinkles08 replied 8 months ago.

A full capability scan tool is going to be necessary to diagnose and repair the issue.