The brake code bypasses the need for immobilizer system communication between the receiver unit and ECM/PCM. Therefore, when you turn the ignition to START or ON, the ECM/PCM will ground the main relay coil and the fuel pump will continue to receive power.

Without the brake code, the ECM/PCM will need the proper immobilizer receiver signal before it will ground the main relay, to turn on the fuel pump.

 

[QUOTE=redbull-1;353718]The brake code bypasses the need for immobilizer system communication between the receiver unit and ECM/PCM. Therefore, when you turn the ignition to START or ON, the ECM/PCM will ground the main relay coil and the fuel pump will continue to receive power.

Without the brake code, the ECM/PCM will need the proper immobilizer receiver signal before it will ground the main relay, to turn on the fuel pump.


Thanks again. I understand now what the brake code does. Car still started this morning. Do I need the security or not? Car is 15 yrs old 210000 miles body is exceptional. I want 3 hundred thousand plus. this is my daughters car always serviced. Just need to know if ECM/PCM will disable car again. My understanding on brake code was 1 to 3 starts then it would disable thanks.

 

Normally the brake code doesn't allow the car to be started that many times.

An October 2001 Honda Service News article mentioned some replacement ECM/PCMs are programmed to give 10 free engine starts before you need to use a programmed ignition key. These free-start ECM/PCMs are intended for the production line, but occasionally, they may get put into parts stock by accident.

Several possibilities:

1. Entering the brake code somehow got the ECM/PCM to communicate with the receiver unit and recognize the encoded signal again. -- In that case, the no-start issue is gone.
2. The ECM/PCM now has a strange glitch and gives free starts without restriction.
3. If you have not started the car more than 10 times, it may not start after the 10th time without a programmed ignition key or the brake code needs to be re-entered.

What may give clues to what has happened would be the immobilizer indicator light on the dash. When the engine starts, what does the immobilizer system indicator do?

Does the indicator (1) comes on steady (2) comes on for a few seconds and goes out or (3) something else?

 

Green key indicator comes on solid for about 2 sec goes off as you start car.

 

Car's immobilizer system may be working normal now and recognized key transponder. Issue may be gone.

 

As I maintenance tech I had to keep looking was not going to trust car. After looking at post with picture of transponder I decided to open up steering column connection was not clicked in. I'm relieved sure it was issue all along. THANKS to all.

 

Good to hear the issue was resolved and thanks for reporting back.