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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Honda civic se sedan automatic immobilizer proplem

I removed the car's battery for 5 minutes, now the green light stays on with the key and the car won't start. had it checked by an auto mechanic without finding a solution. If I install a used ECU, ...
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2 answers
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2004 Toyota Sequoia Limited with seperate immobilizer ecu and key programming

I have a 2004 Toyota Sequoia Limited that has the independent immobilizer unit behind the dash cluster. I am a technician myself but I usually dont deal with systems like this as I work with Heavy ...
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1 answer
772 views

Honda Civic 2002 damaged immobiliser EEPROM and MICU swap

My car developed a few electrical issues one of which is the immobiliser is not recognising the key. To drive the car I had to remove the immobiliser EEPROM (IC: L56R-93c56) on the ECU. The car drives ...
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Is it ok to pull the immobiliser fuse for extended periods of time (Nissan Micra K12)

I have a 2006 Nissan Micra K12. The battery is being drained, which I tracked to the immobiliser fuse. Multimeter showed 0.08amps with fuse in and only 0.03amps with the fuse removed. I don't want to ...
triggs's user avatar
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Audi A3 2005 Damaged ignition barrel?

I am experiencing a problem with starting my 2005 Audi A3. This morning I inserted the key into the ignition and could not switch it to the ON position. I could only switch it to the Accessory ...
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How to deactivate hacking of my ECU and an additional tracker that's placed without my consent

My fear / opinion is that my vehicle's ECU has been hacked. I'm worried about going full speed and someone suddenly stops my vehicle remotely with their installed immobilizer. I'm aware vehicles have ...
Curious bit's user avatar
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Volvo XC40 T5. 2018 immobilizer troubleshooting

With all the 3 keys it's not possible to start the engine. Batteries on the keys were replaced and it works well to open and closed the doors. The only way to start the car is now to place the key in ...
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Honda Civic 2002 remote central locking and key stopped working

I have an issue with my car not starting. The car drove fine never causing any issues. Overnight it developed the following fault. In the morning I could not open the car with remote central locking. ...
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98 Ford Expedition not starting after new key?

Lost the key, used door key (not chipped) in ignition, it started then died. Replaced transponder on switch, still crank but no start. Dealer could not get new key to program, after several keys were ...
Danny Ray Sullivan's user avatar
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1 answer
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Cant reprogram my immobillizer cause my security light shuts off after five seconds chevy equinox 2012

2012 chevy equinox Just replace my ecm had it programmed to my vin but now car wont turn over and cant reprogram immobilizer cause security light shuts off after five seconds ?
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Bypassing the engine immobiliser with a microprocessor?

I have a K13 nissan micra 2014, it comes with a engine immobiliser that has a chip in the key. I am from a Electronics background so excuse any mistakes i make, but would like to be able to start it ...
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2006 Honda Civic Sedan with flashing green key light on dashboard

Before I went to a mechanic to certify the car, it was working just fine, this problem had not occurred at all. The car could be driven just fine with no problems. However, once I had to go to a ...
Andrew's user avatar
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1 answer
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Mini Cooper R56 Completely Dead

I drove mini cooper R56 for a very short distance for about 4 minutes, the whole car died completely. The battery was working fine, everything else seemed fine but the car died altogether. ...
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Ford Figo not starting immobilizer

I have a ford figo 2012 petrol automatic that is not starting. When I turn the ignition to “ON”, all the lights on the dashboard come on and the immobilizer light blinks. The car used to start before. ...
Ali Moumin's user avatar
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Renault Master immobiliser stays off, engine turning over but not firing

I have a 2003 Renault Master, which was left unused for about 4 months. The little light on the dashboard (between STOP and SERV) does not even go on. When I go to start it, the engine turns over but ...
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I have a Citroen C4 Exclusive 2008 model 2L petrol engine not starting, turns over but no power to the coils

Hello, I have a 2008 Citroen C4 with a problem starting, it cranks but does not fire, my keys also stopped working at the same time and the lights, air conditioning, windows, multifunction display and ...
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My car doesn't start and my mechanic can't figure what the issue is

I do apologize for the non much descriptive title, I'll try to work out a better title. Yesterday my car all of a sudden stopped starting (namely I turned the key, the engine cranks that my car doesn'...
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How to/difficulty of transferring immobiliser related wires in an ignition switch harness?

Was replacing ignition switch and realised it had an immobiliser related wire on it which needed to be transferred over. I have no real knowledge of electronics. How does one go about moving these ...
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Yamaha FZ6 S2 - dead after key duplication

I've only had my used 08 bike for a week - first bike. It came with only a master key which I used to ride 2 days ago and I left the ignition in lock position. Today I had a copy made in the local ...
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Jeep cherokee 2004 crd sport Immobilizer relay

i have a Jeep cherokee 2004 crd sport... I am looking for Immobilizer relay part number and position. It seems near impossible to find the info, there not even a 2004 haynes manual regards
Tony Ross's user avatar
2 votes
1 answer
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2007 Honda Accord: Replaced Ignition - Now car won't start

I have a 2007 Honda Accord EX-L Automatic transmission, that I got cheap as a project car. When I got it, the engine ran fine, however it was left at a rural property for about a year and some ...
sharkByte's user avatar
1 vote
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198 views

Attempted key copy leads to immobilizer activating

I attempted to get the key copy for my 2003 Honda Civic at Lowe's. They could not make a copy of it but now my car won't start due to the immobilizer being activated. Less than 15 minutes between ...
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ALL car keys have stopped working

I have a 10 year old Lexus RX400 which was working perfectly yesterday however today I can't unlock it. I've tried all 3 keys and none of them will work. The red light on the key flashes when I ...
Carolyn WIlson's user avatar
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777 views

Immobilizer ring not detecting key chip in warm weather

I have had this peculiar problem since buying my Renault Master, 3 years ago. The immobilizer usually works fine however if I park the van in the hot sun, when I try to start it, I get the ...
Leonardo Seccia's user avatar
2 votes
0 answers
938 views

Central locking doesn't work, alarm goes off when getting into car, won't start

I have a Renaultsport Clio 182 which has been off the road for a while and the battery drained very low When I tried to get into the car to start it, it would not start and the alarm went off. I also ...
James Monger's user avatar
2 votes
1 answer
1k views

Tec-tus 1 immobilizer programming

I have a tec-tus 1 immobilizer, mounted later in my Landcruiser in Germany, possibly from the last century. It has a sensor with a red LED. It reads ordinary RFID-fobs; I have actually tried putting ...
Lenne's user avatar
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272 views

Cable cut on immobilisers?

I have heard of the 'cable cut' principle for immobilisers but have also heard that this can be detected by car thieves with equipment. Does anyone know what this is? I am looking at this immobiliser ...
N A's user avatar
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5 votes
1 answer
62k 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 ...
ElectronicsNewbie's user avatar
5 votes
3 answers
37k 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 ...
ElectronicsNewbie's user avatar
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2 answers
7k views

2003 Honda Accord Crank But no start

I did something really silly last night :( - I have a 03 Accord V6 sedan that I recently changed the transmission. After I hooked up the new tranny etc.. I noticed when I start the car the SRS, (!) ...
andre3wap's user avatar
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6 votes
2 answers
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 ...
Robert S. Barnes's user avatar
7 votes
3 answers
2k views

Ducati Monster 821 - Ignition problems

I have a 2015-Ducati Monster 821 that have started to argue with me. When i turn the key to on - i see the panel light up and the fuel pump etc starts. But when i klick the ignition button, nothing ...
Ripcurl6's user avatar
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3 votes
2 answers
7k views

MINI R53 won't turn over - immobiliser problem?

Mini Cooper S (2003) I've been noticing recently that it's been taking two attempts to get my car to turn over. I twist the key to the third position and nothing. I then try again and it works. This ...
Ricky's user avatar
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2 votes
1 answer
2k views

How do I reprogram an immobilizer system on a 2005 Honda Civic?

I'm currently working on an '05 Honda Civic. I replaced the steering column but now it has a different key. How do I reprogram the immobilizer system?
Bud's user avatar
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6 votes
1 answer
339 views

Old immobiliser playing up, won't add new transponders

Is it possible that an immobilizer has malfunctioned to the point where the adding-new-fobs process doesn't work, but the actual immobilizer is still working? Or is it more likely I'm doing something ...
Dan's user avatar
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3 votes
2 answers
4k views

Immobiliser starter relay versus fuel pump relay

I want to be be able to immobilize a vehicle. The use case is for theft prevention. All along I have been thinking in terms of disabling the starter relay, as discussed here, Current from key to ...
SeanJ's user avatar
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4 votes
1 answer
10k 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 ...
SeanJ's user avatar
  • 491
4 votes
0 answers
754 views

Volvo V40 wont start, red led light on speaker flashes rapidly

My Volvo V40 will not start. When I put the key to position 2, the red LED light on the left speaker on the dash flashes rapidly for 15 seconds. When I turn the key to position 3 the lights on the ...
finlay's user avatar
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6 votes
1 answer
10k views

Citroen Xsara went into "Eco mode" then total blackout

I recently bought a used 2002 Citroen Xsara 2.0 Exclusive (petrol) which had a single electrical issue; the rear wiper did not stop in the "park" position but rather timed out in a random position. ...
jensgram's user avatar
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1 vote
0 answers
103 views

Ignition wire breaks while driving [closed]

I'm putting an immobilizer on the ignition circuitry. Worst case scenarios, if the immobilizer, (normally closed relay), broke what would happen? Would the car continue as normal and then not start ...
SeanJ's user avatar
  • 491
2 votes
1 answer
3k views

How to add a new transponder / key to a Daihatsu immobiliser

How can I add a new key to a Daihatsu immobiliser? The key I have has a Texas 4C transponder, and is used in the Daihatsu Copen and Daihatsu YRV (to name just two).
Nick's user avatar
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4 votes
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Renault modus 1.5 DCI imobilser will not go off

I have recently bought a 2005 Renault modus 1.5 DCI.The dash board displayed 'steering fault' which rendered power steering off. After leaving lights on over night,the battery was drained.I then ...
user6688's user avatar
2 votes
1 answer
885 views

Opel Frontera Electrical Problem - can't access diagnostics

I have an Opel Frontera 1999 2.2 Diesel. It refused to turn over a couple of years ago and it's taken me this long to get to doing anything about it. I was advised that it was something wrong with the ...
byronyasgur's user avatar
2 votes
5 answers
12k 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 ...
ysap's user avatar
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4 votes
3 answers
22k 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 ...
ysap's user avatar
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7 votes
4 answers
136k 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 ...
Kairan's user avatar
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