My alarm system start with no reason on a 2002 accord se. i read on shopkey that the a way to find what switch was trigger to start the alarm. ( unlock 3 times after the system rearm itself) i tried but nothing happen with the status led in the door. somebody toll me the problem was probably the switch. how can i verify that. thank you

That sounds like a low voltage problem. Charge battery (in the trunk) and clean cable ends.

If you lock the car from outside with the key does it happen? If still goes off recomend replace alarm, if not alarm not reading doors locked from auto door locking system

Volvo security systems will cut off power to the starter motor if triggered. Sounds more like you have a bad crankshaft sensor or camshaft sensor. They are what triggers the ECU to turn the coils on and off. Alarm is NOT your problem.

Had a new Lincoln Mark 7, battery was bad from beginning and would trigger alarm when it shorted at random. In your case, outside radio waves may trigger alarm if shielding was removed from alarm antenna.

If your car came with the Prestige Alarm unit, there is a possibility that the alarm box got deprogrammed or burned, and left the anti-theft activated. Use the Valet Switch to deactivate the alarm permanently, and see if the car starts. For some reason unknown to me, it takes a couple of cycles of crank/ take the ignition switch off, crank again for the Valet Switch to work. In my 98 Accord, this micro-switch is installed in the left front kicker panel, but there is no guarantee that it will be in the same place in you accord, since it is a dealer installed option

Starting System
The function of the starting system is to crank the engine at a speed fast enough to allow the engine to start. Heavy cables, connectors and switches are used in the system because of the large currents required.
The starting system consists of a gear reduced starter motor, battery, remote control switch (ignition switch) and relay.
Vehicles equipped with automatic transaxle have a transmission range sensor attached to the circuit which prevents operation of the starter motor unless NEUTRAL or PARK are selected.
Vehicles equipped with a manual transaxle have a start inhibit switch in the starter control circuit, which prevents operation of the starter motor unless the clutch pedal is in the applied position.
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The anti - theft protection system provides protection from unauthorized entry into the passenger compartment.
The system is controlled by an anti - theft alarm control. When armed, unauthorized entry into the vehicle is detected by lamp switches.
Once triggered, the system flashes the headlamps, the parking lamps, the alarm indicator, and sounds the horn. In addition, the starter circuit is disabled to prevent starting the vehicle until the system is disarmed.
System Arming
The system will be armed by the remote entry transmitter when the following input sequence is followed:

1. Turn the ignition switch off and remove the key.

1. Close all doors (unlocked).

1. Press the LOCK button on a transmitter to lock doors. Alarm warning lamp will turn on.

1. Wait for the anti - theft warning lamp to turn off.

The system will also be armed when the following input sequence is followed:

1. Turn the ignition switch off and remove the key.

1. Open a door. Alarm warning lamp will flash.

1. Lock doors with power door switches. Alarm warning lamp will now glow steadily.

1. Close all doors.

1. Wait for the anti - theft warning lamp to turn off.

Opening any door will activate the alarm after the alarm is armed.
Disarming an Untriggered System
The system can be disarmed by performing one of the following procedures.

• Driver or RH front door is unlocked with a key.
• Driver door is unlocked by pressing the UNLOCK button of a remote entry transmitter.
• If remaining in the vehicle, turn the ignition switch to ON or ACC position.

System Triggering
The armed alarm system will be triggered if any door is opened without using a key or a remote entry transmitter to unlock the door first.
Disarming a Triggered System
Carry out either of the following steps will disarm the triggered alarm system.

• Driver or RH front door is unlocked with a key.
• Driver door is unlocked by pressing the UNLOCK button of a remote entry transmitter.

Two minutes and 45 seconds after the system has been triggered, the horns and exterior lamps will shut off automatically. The system will then reset to an armed state and will trigger again if another intrusion occurs.
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Passive Anti-Theft System (PATS)
The Passive Anti-Theft System (PATS), known as SecuriLock, is fully passive in operation and requires no special procedures by the driver to arm or disarm the system. It is invisible to normal scrutiny and is operated by a transponder within the key body. This communicates with the module through a transceiver mounted around the ignition switch lock barrel.
The PATS functionality is incorporated within the powertrain control module.
PATS keys contain an electronic device inside, and are physically larger than a non-PATS key.
The transponder code reading is carried out when the key is inserted into the ignition lock barrel, and turned from position 0' to position II' or III' to crank the engine. If the PCM receives the correct code signal, the engine will start. Should the code received not be recognized, the engine will not crank as the PATS is still armed and the engine immobilized.
Anti-Theft Indicator
Whenever the ignition is switched on the anti-theft indicator will remain on for three seconds while the system carries out an initial ignition key-read.
The anti-theft indicator will flash rapidly for three seconds to indicate the PATS has immobilized the vehicle.
For additional information on the PATS fault codes, refer to the Diagnosis and Testing section.

you should be able unlock the drivers or pass door with the key and it should cancel the alarm unless it has a bad switch in the door unless its not factory then you have to disconnect it and wire the vehicle back to original

Check for a sticker with the radio code inside the glove box. Some dealers fixed a second sticker in the owners manual. If not available, get the code from a Honda dealer, and be prepared to show VIN number, and proof of vehicle ownership.

Sounds like a duff cell in your battery, v common on fords, voltage drop causes alarm trigger, ever have cold start problems?, easy thing to check

Hi,
Does the vehicle have an aftermarket alarm system? Is the valet switch for this what you are looking for? If so, it depends entirely on who installed it as where they have put it, although it's usually under the dash on the driver’s side. Some alarms have different sequences that you have to go through to put the alarm into valet mode; it's not usually just a switch that you flick. Best to pop into an alarm or stereo installer and see if they can spot it for you, or if the car is immobilized, find out what sort of alarm it is and call an installer for the info on the valet procedure.

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