Questions tagged [immobilizer]

A vehicle anti-theft system that inhibits engine run unless certain requirements are met before a start attempt. The most common is an RFID chip in the ignition key.

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7
votes
4answers
121k views

2006 Honda Civic EX - Green Key Light on dash

Problem: I try to start my car with the original factory key, as well tried with the other factory key (both have chips in them) and the car will start, run for a second then shut off. All the while ...
2
votes
5answers
10k views

How to program a transponder key of a 2000 Toyota Sienna

This is a follow-up question to my previous question regarding the replacement of the ignition switch cylinder in my car. In my 2000 Sienna there is an immobilizer circuit embedded in the switch. I ...
5
votes
1answer
48k views

OBD II Scanner refuses to communicate with the vehicle!

All the fuses check out All the relays check out Could I have a faulty ignition switch? Or an open somewhere? How do I go about troubleshooting this? It cycles through all the protocols, finds ...
5
votes
3answers
25k views

What does it take to program a used ECU?

I own a Mazda MPV 2000 with a faulty ECU. The vehicle has an immobilizer. It will not start with the former ECU. It floods the engine with fuel. After extensive diagnostics on the vehicle and the ...
4
votes
3answers
21k views

Replacing the ignition switch tumbler (cylinder)

Recently we started having problems turning my 2000 Sienna's key in the switch past the OFF position. I have to wiggle the wheel for some time and play with the key, until it "catches" the right ...
6
votes
2answers
2k views

How does a cobra alarm system disable starting

I have a 1998 Mazda 626 with a cobra Auto security system. I suspect some problems I have been having are related to this system and was wondering exactly how it disables starting. Specifically one ...
4
votes
1answer
7k views

Current from key to solenoid of starter motor relay

I am considering installing a starter motor immobilizing relay inline with the starter setting of the key and starter solenoid. I recently got a MAH-112-C-4 online. It has a 30A switching ...