Alarm system going off? Reset?

Tiny
ROSS ISENBERG
  • MEMBER
  • 2007 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
The alarm system is going off randomly with the car it seems to happen at random times, I can hear it from my apartment.

How do I disable or disconnect the alarm system so that it does not go off anymore?
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Wednesday, September 5th, 2018 AT 11:24 AM

13 Replies

Tiny
KEN
  • ADMIN
Hello,

Try this guide

https://www.2carpros.com/articles/how-to-reset-a-security-system

If not it sounds like the certification ECU maybe going out but lets disconnect the battery and remove the certification ECU to check for corrosion also this can sometimes fix bad connections. I have also seen where the drivers side front door latch wears and it causes the micro switch inside to not work right causing the alarm to do off. With the car locked and the alarm on try pulling on each one of the doors (shut) to see if you can get the alarm to go off this will tell you which door latch to replace. Here are the wiring diagrams for the security system so you can see how it works and the location of the certification ECU. Check out the diagrams (below). Please let us know what happens.
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Friday, September 7th, 2018 AT 10:39 AM
Tiny
DM45769
  • MEMBER
  • 2007 TOYOTA CAMRY
  • 45,000 MILES
Installed a new battery and now the car won't start, crank, radio won't turn on. Fuses were checked as good. Lights work, horn works, you can set off the alarm, but car won't even crank or make noise of any kind when you try to start it.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
RIVERMIKERAT
  • MEMBER
It sounds like you have a bad connection at the battery even if the security was on it would not cut power to the radio. Please confirm the battery terminal connections here is a guide.

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

If they check out here is what the book says to reset the alarm system.

REGISTRATION
1. DESCRIPTION OF CODE REGISTRATION
HINT
ID codes are the same as recognition codes for the wireless transmitter and the engine
immobilizer function. Registering an ID code enables the smart access system with pushbutton
start, the wireless door lock control function ant) the engine immobilizer function
to be operated.

Code registration is needed when the certification ECU, ID code box, steering lock ECU
or key is replaced with a new one.

PROCEDURES
The vehicle with the smart access system with push-button start system does not have a key slot. Therefore, hold the key close to the engine switch to register the key, as shown in the illustration below.

Fig. 3: Identifying Engine Switch Register Key

2. PART REPLACEMENT KEY REGISTRATION
The following table shows ECU replacement and key registration procedures in case the malfunctioning ECU has been identified after troubleshooting the smart access system with push button start.

HINT:
The following procedures indicated in the table below require the use of the intelligent
tester:

A maximum of 7 keys can be registered.
PART REPLACEMENT KEY REGISTRATION
Part to be replaced Condition Procedure Reference

1. Replace certification ECU - ENGINE IMMOBILIZER (EXCEPT HYBRID)

2. Re Register all keys (new key ID registration)
PROCEDURE "B" See step b Some keys are lost Key ID codes can be registered and erased

1. Erase key codes (key ID erasure) PROCEDURE "D" See step d

2. Perform additional key registration procedure (additional key ID registration)

PROCEDURE "C" See step c
3. Replace certification ECU -
4. Re Register all keys (new key ID registration)

HINT: If some keys are not registered during above steps, they will be disabled because they cannot be registered later

ENGINE IMMOBILIZER (EXCEPT HYBRID)

Part to be replaced Condition Procedure Reference

All keys are lost
1. Replace ID code box -
2. Replace certification ECU -
3. Re Register all keys (new key ID registration)

HINT: If some keys are not registered during above steps, they will be disabled because they cannot be registered later

Key Customer has brought at least 1 key
1. Using remaining key, erase lost key code (key ID erasure)

a. PROCEDURE "A"

1. Connect intelligent tester (with CAN VIM) to DLC3
2. Turn engine switch on (IG) Select "SMART ACCESS / ID UTILITY / SMART CODE REG" from tester menu
3. HINT:The engine switch cannot be turned on (IG) more than 10
times. After connecting tester, turn tester on while turning driver's
side door courtesy light switch on and off repeatedly at 1.5-second
intervals or less to continue key registration procedure
2. Confirmation of ECU code
Perform operation according to prompts on tester screen
HINT: The mode is automatically selected by tester, new registration mode
or add mode Hold unregistered key close to engine switch (For details, refer to
PROCEDURE "1" ) ENGINE IMMOBILIZER (EXCEPT HYBRID) -2007 Toyota Camry XLE
Confirm that wireless door lock buzzer sounds. Place unregistered key on front passenger's side seat Confirm that wireless door lock buzzer sounds
4. Registration of
ID code Perform operation according to prompts on tester screen
5. End of registration Finish new key ID code registration
(1) Repeat this process for each key which is to be registered for the vehicle. Finish the
procedure for each key within 30 seconds. If the procedure for any of the keys has
not been finished within the specified time, perform registration procedures from
process 1 again. Make sure that only 1 key is in the cabin during registration
procedures. If 2 or more keys are in the cabin simultaneously, electric waves will
interfere with each other, preventing normal registration.
b. PROCEDURE "B"
New key ID registration (when replacing certification ECU)
KEY REGISTRATION PROCEDURE "B" REFERENCE
Process Procedure
1. Start of registration
1. Connect Intelligent tester (with CAN VIM) to DLC3
2. Turn engine switch on (IG)
Select "SMART ACCESS / ID UTILITY / SMART CODE
REG" from tester menu
3. HINT:The engine switch cannot be turned on (IG) more than 10
times. After connecting tester, turn tester on while turning driver's
side door courtesy light switch on and off repeatedly at 1.5-second
intervals or less to continue key registration procedure
2. Confirmation of ECU code
Perform operation according to prompts on tester screen
HINT: The mode is automatically selected by tester, new registration
mode or add mode
3. Confirmation of all registered keys
(1) Hold unregistered key close to engine switch (For details, refer to
PROCEDURE "1" )
Confirm that wireless door lock buzzer sounds
4. Confirmation of ECU code Perform operation according to prompts on tester screen
5. Verification of unregistered key (1)
Hold unregistered key close to engine switch (For details, refer to
PROCEDURE "1" )
Confirm that wireless door lock buzzer sounds. Place unregistered
key on front passenger side seat
Confirm that wireless door lock buzzer sounds
5. Registration of ID code Perform operation according to prompts on tester screen

This guide can help as well

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please run down this guide and report back

Cheers
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
HELPLESSONE
  • MEMBER
  • 2002 TOYOTA CAMRY
Electrical problem
2002 Toyota Camry Automatic

i had not moved my car in a long time because the license plate was expired, about a month. After that my car would not start, so I took the battery to charge. They said it was a little discharged. After that my car was fine until.

My problem is that when I start my car it takes long to do so, as if the battery was low or something. After I do all, and I mean all of my lights start blinking, dashboard, headlights, everything. I turn off the car, but immediately after I do the alarm goes off. I deactivate the alarm with the control, and try to turn the car on again. Once again it takes long to start. Like the battery has no juice. But no blinking lights afterwards and it runs fine.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi helplessone,

From the symptom description, either the battery is weak or the terminals had not been secured well.

Are you still getting the same problem now?
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
HELPLESSONE
  • MEMBER
Yeah, I even took the battery off and put it again, making sure the terminals were definitely tight and in place
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
If that is the case, you would have to check the starter motor. It could be weak.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
HELPLESSONE
  • MEMBER
Actually I took it to a mechanic today, and they couldn't find anything wrong with it. Guess I have to go to the dealership because it might be the alarm after all.

P.S. On my way to the mechanic it did the blinking thing again, but this time way after I had turned it on. Weird. Just as long as it doesn't die on me on the road.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
It could possibly be an intermittently failing igntion switch. When this happens, power supply is interrupted resulting in the alarm system being tripped.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
GMSD82
  • MEMBER
  • 2000 TOYOTA CAMRY
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,000 MILES
Every once in a while, my daughter's 2000 Camry aftermarket car alarm will go off when she tries to enter her car. The alarm goes off. She can get in, and tries to start the car, but it won't start. It has a little red button to the left of the steering column that can be pushed in, or out. That's about all we know about it. The Toyota dealership identified it as "after market"

How can we figure out how to turn off the alarm when it happens? What steps should she try to do? Somehow she's managed to get it turned off in the past, but tonight, while 800 miles from home, it wouldn't.

She was stranded at a park tonight when it happened. She finally got the car started after someone helped her disconnect and reconnect the battery, but the man also disconnected the horn.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
MHPAUTOS
  • EXPERT
Hi there,

Trying to diagnose this type of "after market " item is near impossible with out being able to see first hand how it is wired up. I would get an auto electrician to disarm the system, then either install a know new unit that you will be able to repair if it goes wrong.

Mark (mhpautos)
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
HELPLESSONE
  • MEMBER
Thank you for all your support, I haven't fixed the problem, but I guess its one that I can live with.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
I the ignition switch is failing, the problem is going to get worse and might even cause engine to stall and/or prevent it from starting more often.
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Monday, July 27th, 2020 AT 1:33 PM (Merged)

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