No start, no crank after battery removed for many hours

Tiny
WEBBEYOND2000
  • MEMBER
  • 2006 MAZDA 3
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 106,000 MILES
Hello,

Symptom:
No start, no crank (total silence), with the following dash lights illuminated (power steering light on, engine light on, brake light on, engine oil pressure warning light on). Scanner did not show any fault codes.

Question:
If the battery is removed from the car for 5+ hours and reinstall the battery back, will it cause the anti-thief (immobilizer system) not to recognize the chip in the key which might cause the no start, no crank issue? If so, how do you resolve this problem? Is there a way to reset it or only a Mazda dealer can do it, how much does it cost?

General information:
Let me starts by saying the car starts-up normal, no issue at all before the battery was removed. To cut the story short, this is what I did that cause the no start, no crank. I wanted to re-mount the TCM (transmission control module) to a different location due to the TCM overheating from lack of air circulation which caused the "at" fault code for many mazda owners. I wanted to be pro-active before that happens to me, I took the advice from many Mazda owners to re-mount the TCM on the firewall to avoid the overheating issue.

Before I can access, disconnect, re-mount and re-connect the TCM, I had to remove the battery entirely and disconnect the ECU or PCM mounted next to the battery box. It should be a 1 hour job but after I removed the battery and all the parts mentioned above, I was called way to work on other things. Five hours later, I came back and re-mounted the TCM to the firewall, reconnected the TCM, ECU/PCM and re-install the battery. Went in the car, turn the key and nothing happen. No start, no crank (total silence) except for the illuminated lights mentioned above.

I am thinking, maybe the battery was removed for too long (5+ hours) which caused the anti-thief system (immobilizer) not to recognize the chip inside the key anymore. However, my remote works, I can lock, unlock, armed and disarm the car. At this point, I am lost. What cause this problem and how can I resolve it? Does anyone knows how to reset or re-sync the anti-thief system to the key? Is there something I have overlook? Thank you!
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Saturday, June 13th, 2020 AT 12:13 AM

5 Replies

Tiny
WEBBEYOND2000
  • MEMBER
I just wanted to clarify from my description, the working remote I am referring to is a separate piece and are not integrated with the key.

I have recorded a video today trying to start the car and it had the same symptom. Please look at the video. If you need anything else, please let me know. Thank you!
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Saturday, June 13th, 2020 AT 12:59 PM
Tiny
WEBBEYOND2000
  • MEMBER
Here is a picture of the dash panel light. I noticed the Security Key light does not show up and it is always like that from the beginning. After I insert the key and turn to the ON position, the blinking Security Key Light goes away in a few second but the engine will not crank. Since I don't have the Security Key Light blinking all the time, does that mean it has nothing to do with the Anti-Thief System and Its something else instead?

Just a thought, when I re-mounted the TCM to the firewall away from the transmission body, the TCM is no longer grounded to the body anymore. The firewall is painted and there is no grounding. I am not sure if that could have caused all these problems. However, I believed (not 100% certain) the TCM grounding is provided from the wire harness. I could be wrong.
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Saturday, June 13th, 2020 AT 3:47 PM
Tiny
JOE F
  • EXPERT
Hi,

Ground is provided via a wire in the connector. See the attached picture. Check that ground. Also, I noticed that there is no gear indication on the dash. Check the ground. The TCM isn't allowing it to start. It isn't getting a signal from the range sensor (neutral safety). I don't feel this has anything to do with the security system. Also, check the fuses I have in pic 2.

Let me know what you find.

Joe
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Saturday, June 13th, 2020 AT 7:59 PM
Tiny
WEBBEYOND2000
  • MEMBER
Fixed!

Joe, thank you very much for your help. You are correct, the Trans-axle Range Switch (Neutral Safety) was the problem. I replaced the switch and the car fired up! Thank you again and have a great day!
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Sunday, June 14th, 2020 AT 7:22 PM
Tiny
JOE F
  • EXPERT
You are very welcome. I'm glad that you got it running.

Take care and let us know if you have questions in the future.

Joe
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Sunday, June 14th, 2020 AT 8:09 PM

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