Alarm Sheriff 5BTX900LCD (ZX-900)

The security system manufactured under the Sheriff ZX 900 brand does not have an auto-start option. However, the design of this system initially contains elements with which it is easy to implement a turbo timer. Moreover, such a timer will be compatible with any ignition switch, regardless of the number of lines switched by it. Along the way, it will be possible to block one or more power circuits, as well as connect an alarm transmitter. How to achieve all this is discussed further.

ZX-900

Installation and Use Guide.

The system has six independent (two of them are remotely controlled) functionally reprogrammable channels.
These are six physical wire lines with programmable operating logic, providing flexible changes in system functions for controlling the shutdown of turbocharged engines (turbo timer), searching for a car in a parking lot, remotely turning off the system siren in the “NIGHT” mode with a control channel for an additional pager or mobile communication device, security service a car with the engine running without an ignition key, control of additional devices at specified time intervals. The interactive pager provides real reception of signals confirming the execution of a command by the system. During one security cycle, the system provides information about each triggered sensor on the LCD display of the two-way communication key fob.

To ensure the highest level of protection for your vehicle, this security system has a programmable manual override feature. In some cases, for example, when the system's remote control key fob transmitter is lost or does not work (or perhaps your key fob transmitter is blocked by powerful radio emissions from a jammer-type device), you may need to manually arm or manually disarm the system. Read the sections “Manually arming the system” and “Manually disabling the security system,” which detail the procedures for arming and disarming the system in such a situation. In addition, this manual contains a table in one section of which the system functions are used, including the selected system shutdown method, and the optional equipment installed in the vehicle. Although the Secret Code function is not programmed by default (you must enter a personal code to disable the system), the Valet switch can also be selected to disable the system. See which method was programmed to shut down your system and review it in the appropriate section of this manual.

If the F13 “Secret Code” function is programmed, then writing codes for new key fobs, changing the secret code, changing the status of programmed functions from F12 to F27, emergency disarming of the system, turning off the system when triggered in Anti-Hi-Jack modes are possible only after entering the secret code! Changing the parameters of functions F1 to F11 does not require entering a secret code and is always available.

Standard System Features

Super KeeLoq Pro II dynamic code.
Separate control of security on/off modes.
Possibility of programming up to four transmitters.
One five-button programmable transmitter with built-in interactive pager and LCD display.
One four-button programmable transmitter.
Active anti-robbery transponder (additional option).
Valet Push Button Switch.
Sound confirmation of Valet mode.
Two-level shock sensor.
Small-sized siren.
Built-in side light control relay.
Built-in universal power output for controlling door locks.
Control of the car's central locking in Valet mode and with the engine running.
Three circuits of complementary interlocks (installation of an additional relay is required).
Two connectors for connecting additional sensors (impact, volume).
Six programmable channels for controlling vehicle service devices (additional locking, turbo timer, trigger channel, timer channel, power window control, courtesy light output, etc.).
Two remotely controlled channels for controlling service devices.
Security when the engine is running.
Remote control of the siren channel in security mode (disable/enable).
Additional (programmable) channel for controlling an external pager/actuator.
Additional (programmable) input trigger of negative polarity.
Manually setting the system to full security mode at any time using the Valet button, even in the absence of the ignition key.
Silent arming and disarming of the system.
Temporarily disable shock sensors.
Temporarily disable the passive arming function.
Disabling the alarm from the remote control.
Remote control of the Panic function in all modes.
Sound and light warning of system activation.
Indication of alarm channels.
Sound and light confirmation of the execution of two-way key fob commands.
Limiting false positives.
Limited alarm time.
Perimeter security.
Bypass the fault zone.
Multifunctional LED indicator.
Trigger memory.
Memory of VALET, DISARM (disarmed), TRIGGERS (security input status) states when the system power is turned off.
Immediate alarm activation when the system power is turned off/on in ARM mode (security).
Disabling the passive engine blocking mode from the key fob transmitter.
Control of trunk opening with temporary disabling of sensors and the hood/trunk security channel.

Programmable system functions

Programmable immobilizer function (passive engine blocking).
Programmable personal code for shutting down and controlling the system.
Programmable delay for arming the system: 5/10/35 sec.
Programmable Comfort function (close all - closing impulse of programmable duration - 10/15/22/30 sec).
Multi-channel programmable Anti-Hi-Jack function (remote activation / when the ignition is turned on and the DOOR(+) or DOOR(-) limit switches are triggered or the vehicle starts moving).
Programmable door lock control pulse duration: 0.5/1/3.5 sec.
Double impulse to unlock the doors.
Programmable re-arming function.
Programming the central locking control mode when re-arming.
Passive/active arming of the system.
Programmable automatic door locking during passive arming.
Programmable automatic door locking when the ignition is turned on.
Programmable automatic door locking when driving.
Programmable automatic door unlocking when the ignition is turned off.
Output CH2 is a low-current reprogrammable controlled channel of additional devices: programmable time intervals, service pulses, control of the electric trunk drive, trigger output 1, trigger output 2.
Output CH3 is a relay reprogrammable controlled channel of additional devices: programmable time intervals, service pulses, control of the electric trunk drive.
Output CH4 is a low-current reprogrammable channel of additional devices: programmable time intervals, service pulses, window lift control, polite backlight output.
Output /ARM(-) - low-current reprogrammable channel of additional devices: output of additional HP-type blocking, turbo timer.
Output CH5 is a low-current reprogrammable channel of additional devices: an additional HP-type blocking output, a control output for a pager or other actuators.
Output CH6 is a relay reprogrammable channel of additional devices: a “polite” backlight output, a turbo timer, a remote radio-controlled service impulse channel (remote on/off of the channel in real time using an alarm clock).
Programmable function to disable “false” alarms of the system.
Programmable function of pager control of the vehicle ignition mode in any system state.

Transmitters with technology to protect digital codes from interception (Keeloq)

The key fob transmitters included with this security system use the most advanced and reliable form of radio frequency transmission of any car security system currently available. Some of today's sophisticated car thieves use devices known as code grabbers, which allow them to receive and store the signal sent by the car's remote control device. After the driver leaves, this code is used by the thief to disarm the system.

Unlike the remote control devices described above, the key fob transmitters included with your security system change the code of the transmitted signal every time the button is pressed, so when a thief plays the intercepted signal from your key fob transmitter, the security system simply will not respond to it. If the button on your transmitter key fob is pressed more than 30 times when it is outside the control of the security system (for example, children are playing with it), the system will not respond to the call from the transmitter key fob when you decide to use it again. You need to synchronize your key fob transmitter with the security system receiver. To do this, simply press the system arming/disarming button on the transmitter key fob twice within one second. After this, the system will again respond to all remote control commands.

Page 5

currently car security systems.
Some of today's sophisticated car thieves use devices known as code grabbers, which allow them to receive and store the signal sent by the car's remote control device. After the driver leaves, this code is used by the thief to disarm the system.

Unlike the remote control devices described above, the key fobs-transmitters included with your security system change the code of the transmitted signal each time.

the first time the button is pressed, so when the hijacker plays back the intercepted si-

pushed your key fob transmitter, the security system simply will not respond to it. If the button on your transmitter key fob is pressed more than 30 times when it is outside the control of the security system (for example, children are playing with it), the system will not respond to the call from the transmitter key fob when you decide to use it again. You need to synchronize your key fob transmitter with the security system receiver. To do this, simply press the system arming/disarming button on the transmitter key fob twice within one second. After this, the system will again respond to all remote control commands.

Key fob transmitter buttons

Button for arming the system
(ARM)
Button for disarming the system
(DISARM)
Button for controlling the programmable channel
ch2,
controlling system modes when arming/disarming the system

Programmable channel control button ch3,

control of additional channels Button for changing the parameters of signal signals

pager, turn off the sound and light alarm of the pager

LCD display indicator combinations

3+(4) Control signal transmission (in zone/outside

5+6+7 Security mode: locking/unlocking. 8+9 Bypass the main shock sensor area. 9+10 (flashing) “Alarm triggered by strong impact” or

"arming with bypass of faulty

11 (flashing) Anti-Hi-Jack.

11 Anti-violent protection function enabled

12[flashing) “System triggered by limit switch

doors" or "arming with fault bypass

new door area."

13 Vibrate mode is turned on. 16+15(flashing) Battery full/battery low. 14 Set/cancel CH6

by timer.
14(flashing) Output CH6
is activated. 17 (flashing) Pager call. 18 Power saving mode (if the main system

disarmed, its current consumption is zero).

Valet mode enabled

— the icon is shown on the display

always while the system is in Valet mode.

24+23 Standard alarm mode. 24+25 Silent alarm/night mode.

23+24+19 (flashing) Arming when the car engine is running. 26 (flashing) “The system is activated when the ignition is turned on.” 27+21 [flashing) “Trunk/hood open” or “system triggered by the hood/hood limit switch”

garage door" or "arming by bypassing the faulty hood/trunk area."

28 (flashing) Indication of vehicle side lights. 29 Set CH6 installation time.

29 Set
the CH6 cancellation time.
Prepared by AutoSet. Car alarms and car electronics.

Specifications

Technical parameters of the product Sheriff ZX-900:

voltage in the power supply circuit of the head unit - from 9 to 15 V;
power consumption - up to 20 mA;
permissible current in circuits of additional channels: 0.5-1.0 A;
current strength in the siren line - up to 2 A;
current in the light signaling and central locking circuits - up to 15 A;
command transmission distance by communicator - up to 550 m;
range of the auxiliary transmitter - up to 20 m;
frequency range of the remote controls is 433.92 MHz.

The Sheriff communicator with 5 buttons is designed to use an AAA battery (voltage 1.5 V), which is installed in a compartment protected by a lid. The device is equipped with a unit for monitoring the degree of battery discharge; the display shows the battery status. When the charge decreases, the icon begins to blink, and then the red control diode turns on.

Equipment

The security complex was supplied to customers in the form of a set of parts packed in cardboard containers, including:

head unit equipped with a controller and relay contact units;
main communicator with 5 buttons and LCD screen;
backup transmitter (with 4 keys);
external module with antenna and status indicator;
sensor for measuring impact force (adjustable);
Valet switch (with separate cable);
trunk lid contact sensor;
a set of connecting cables with plugs and fuses;
additional relay for blocking engine start circuits;
technical documentation for installation and use.

Functions

Standard modes and functions supported by the equipment:

separate keys for disarming and arming;
support for protection mode when ignition circuits are running;
remote change of siren channel operating parameters;
emergency arming using the Valet switch;
silent control mode (customizable);
remote control of shock sensor;
giving alarm signals by car siren and lighting equipment;
storing the last state of the complex when the processor unit is de-energized;
resuming alarms when power is restored;
possibility of unlocking the trunk lock with temporary disabling of the shock sensor.

Advantages and disadvantages

The main advantages of the equipment noted by the owners:

low cost;
2-way exchange of information is provided;
additional channels for controlling external equipment.

Disadvantages of the ZX-900 budget alarm:

interference from neighboring cars in the parking lot;
rapid discharge of batteries in the communicator;
outdated design, autorun support is not provided.

How to install

The instructions for the ZX-900 recommend adhering to the following installation sequence:

Unpack the alarm, connect the components, and then apply power from the car battery for a preliminary test of functionality.
Install the processor unit in the cabin, ensuring good fastening to the structural elements.
Place switches under the trunk or hood lid that determine the position of the elements.
Screw the sound alarm to the engine bulkhead (it is permissible to use a product with an autonomous power source).
Stick the antenna unit onto the upper edge of the windshield.
Lay the cable and secure the hidden switch. The unit is located in a quick access area from the driver's seat.
Screw the shock sensor to the engine shield on the passenger side of the car. Provide unobstructed access to the part to adjust sensitivity.
Connect the elements with the wiring harnesses supplied by the manufacturer. The connection is made in accordance with the diagrams from the documentation. The alarm system is equipped with a built-in controller that implements the central locking function.

How to remove the body of the Sheriff 5btx925lcd key fob

To disassemble the key fob you will need: a small Phillips screwdriver, a small napkin, a knife or a thin plate. To remove the remote control housing, follow the instructions.

Turn the keychain back towards you.
Open the battery compartment cover. Remove the battery.
There is a self-tapping screw in the battery niche. Unscrew it.
Using a knife or narrow plate, pry the body in the middle.
Carefully separate the pager into two parts.
After the work has been completed, assemble the key fob in reverse order.

User manual

The control unit of the Sheriff ZX-900 equipment is programmed based on the tables given in the operating instructions. When shipped from the factory, the setting is entered by alternating the use of the ignition and pressing the hidden Valet switch. The driver or installer can program a separate function that requires a 2-digit numeric password. The setup method and input algorithm are described in detail in the car alarm user manual.

After entering the menu, you must select the required section (by pressing the Valet button). To adjust the current value, use the button with the locked padlock symbol located on the 5BTX900LCD communicator. The adjuster performs from 1 to 5 clicks, selecting the required value from the table. After programming, it is recommended to test the operation of the complex and make adjustments (if any failures are detected).

A communicator or backup transmitter is used to control security and additional functions. The display of the main console schematically displays the state of the security zones when the protection is turned on; a separate field is allocated to display the current time. Since the screen is unified for several modifications of Sheriff alarms, some of the icons are not used.

If the remote control is lost, the driver turns on the vehicle security by pressing the Valet switch for 3 seconds. After the beep, the control diode turns on (in rapid flashing mode), which indicates that the door switches or trunk lid are waiting to close. After closing the last door, the car is armed; a regular car key is not required.

The alarm system supports an additional transponder, which is previously stored in the memory of the head unit. Additionally, adjustments must be made to the ZX-900 equipment settings. After activating the mixture ignition circuits, the search begins for a device that must be stored with the communicator. If the device is detected, the engine start circuit interlock is disabled. If the transponder is not detected, protection of the ignition and starter circuits is activated.

Why is it not programmable?

It is not always possible to program the remote control key fob Sheriff 940, 2500, 4BTX940LCD, APS95LCD B4, etc. This occurs due to incorrect operation of the system:

the remote control is faulty;
the alarm is constantly in the “Valet” mode, as evidenced by the red LED;
damage to the electrical circuit running from the button to the control unit;
The system does not recognize the “Ignition on” command. In this case, contact the service center immediately.

Find out what to do if the Alligator alarm does not respond to the key fob.

Main functions of the system

Super Kee Loq ProII dynamic code;
the ability to control the opening and closing of the luggage compartment by turning off the sheriff zx 900 security sensors over time;
the car alarm has two separate channels for controlling security modes;
disabling the engine immobilizer from the sheriff zx 900 key fob;
simultaneous programming of two pairs of transmitters;
Instant alarm triggering when trying to turn off system power in ARM mode;
sheriff zx 900 main transmitter with five programmable buttons, equipped with an interactive pager and a TFT screen;
memorization of VALET, DISARM (security system stop), TRIGGERS (security input state) modes when the supply voltage is turned off;
main programmable transmitter with four buttons;
remembering inclusions;
active anti-robbery transponder (optional);
color indicator – LED;
Valet analog trigger;
bypassing the breakdown site;
sound notification about Valet mode in the alarm system;
observation of the surrounding area and its protection;
two-level shock sensor;
car alarm sets the duration of the alarm period;
small siren;
almost complete elimination of false inclusions 58tx900lcd;
built-in control system for vehicle signal lights;
sound and light accompaniment of any commands transmitted by the key fob, both incoming and outgoing;
reinforced channel for monitoring door locks;
displaying the status of the sheriff zx 900 siren trigger channels;
control of the main lock of the car in Valet mode, including when the engine is running;
light and sound when the system is turned on;
triple complementary blocking (it is necessary to install an auxiliary relay);
control of the panic alarm function regardless of distance;
several slots for connecting additional sensors;
stopping the alarm signal from the remote control (key fob);
several programmable channels for monitoring the service systems of the car (second blocking, turbo timer, trigger channel, timer channel, raising and lowering windows, etc.);
disabling the timer security function;
a pair of channels, with the possibility of remote control, responsible for the operation of car service systems;
disabling shock sensors for a certain period;
maintaining security while the engine is running;
turning on and off the alarm without sound and light effects;
control of the security siren while standing;
putting the car into full security mode using the Valet key, including if there is no ignition key;
auxiliary channel for monitoring an external pager or actuator;
auxiliary (programmable) trigger of input type and negative polarity;

Transmitters

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Transmitters are equipped with a technology to ensure the security of digital codes from interception attempts (Keeloq)

The key fob that the sheriff zx 900 is equipped with has the most highly protected radio channel. Many car thieves use a signal memory system that transmits a signal to the car's key fob and records it. When the driver leaves, the burglars send a code to the car and steal it. More information about this can be found in the instructions for the device.

Sheriff zx 910 works according to an algorithm that constantly changes the code. Even if the villains record the signal, the car will not respond to it. If the button on the sheriff zx 900 key fob is pressed more than thirty times (for example, children are playing with the key fob), out of sight of the car, then when you try to open the car, the transmitter will not work. In order for it to work again, it needs to be synchronized with the security system.

Protection measures

There may be an opinion that there is no protection from this device. But that's not true. It is enough to equip the car with an alarm system with dialogue encoding and the ability to turn off the standard radio channel. These requirements are met by almost all modern security devices from leading domestic manufacturers Pandora and StarLine.

Hijackers have never managed to intercept the control code of these alarms.

And you can install them in any Autostudio service. Just call and make an appointment.

Instructions for manually arming the system

If it is not possible to use the sheriff 5btx900lcd key fob, use the Valet button, it will help even if you do not have a car key.

Instructions for fully arming the vehicle:

press briefly, quit, and then press and hold (more than 3 seconds) the VALET key until you hear a signal that the car has turned on the alarm;
the LED will flash, signaling the closing of the last door;
after closing the door, after three seconds the full security mode will turn on;

If there is a duplicate closing chain for the doors, and with program function F27 active (when the security system is turned on, then, according to the instructions, all doors are locked automatically), they are closed accordingly. Arming in manual mode is performed once, until the security system is turned off.

Note: if the ignition is turned off, manual arming is only possible after a pause of 5 seconds.

Autostart at time intervals or at specified temperature

If you want to configure the engine to start at certain time intervals, you need to:

Press F twice;
Go to the indicator flashing mode;
After you click on the same button again, only the selected indicator will remain;
The frequency of its flickering indicates a previously established cycle:

No blinking indicates that the function is disabled;
Uniform flashing – the cycle lasts an hour;
Two flashes and a pause - a two-hour cycle;
Three flashes and a pause - four hours;
Four flashes and a pause - twelve hours is set.

SHERIFF CAR SECURITY SYSTEM WITH SIX SERVICES.

Sheriff, Zx-900 sheriff

CAR SECURITY SYSTEM WITH SIX SERVICES

NUMBER CHANNELS, REPROGRAMMABLE OPERATION LOGIC, BUILT-IN LCD, INTERACTIVE PAGER AND ANTI-BIGGER ACTIVE TRANSPONDER

INSTALLATION AND USE GUIDE

The system has six independent (two of them are remotely controlled) functionally reprogrammable channels. These are six physical wire lines with programmable

logic of operation, providing flexible changes in system functions to control

turning off turbocharged engines (turbo timer), searching for a car in a parking lot, dis-

stationary shutdown of the system siren in “NIGHT” mode with an additional control channel

private pager or mobile communication device, car security service with the engine running without an ignition key, control of additional devices at specified time intervals.

The interactive pager provides real reception of signals confirming the execution of a command by the system. During one security cycle, the system provides information output

about each triggered sensor on the LCD display of the two-way communication key fob.

To ensure the highest level of protection for your vehicle, this security system

The theme has a programmable manual shutdown function. In some cases, for example

when the system remote control key fob transmitter is lost or does not work (or perhaps your transmitter key fob is blocked by the device’s powerful radio emissions

"jammer" type), you may need to manually arm or manually disarm the system. Read the sections “Manually arming the system” and “Manually disabling the security system,” which detail the procedures for arming and disarming the system in such a situation. In addition, this manual contains a table in one section of which the system functions are used, including the selected shutdown method.

system, and additional equipment installed in the vehicle. Although the “Secret Code” function is not programmed by default (to disable the system, you must

you can enter a personal code), the switch can also be selected to disable the system

Valet. See what method was programmed to shut down your system,

and review it in the appropriate section of this manual.

If the F13 “Secret Code” function is programmed, then recording the codes of new key fobs, changing the secret code, changing the status of the programmed functions from F12 to F27,

emergency disarming of the system, shutdown of the system when triggered in modes

Anti-Hi-Jack is only possible after entering the secret code! Changing Function Settings

F1 to F11 does not require entering a secret code and is always available.

Prepared by AutoSet. Car alarms and car electronics.

Flashing an old 5BTX 925 LCD switch

Each action must be completed within five seconds. If you do not meet this time, the system will exit the setup mode. Start recording key fobs by turning off the anti-burglary transponder. Next, follow certain points.

Disarm the car. Turn on the ignition.
Click on "Jack" three times. A beep will follow.
Press and hold the 1st key on the first remote control until you hear a long beep, confirming successful recording. The LED will flash rarely.
Repeat the previous operation for the remaining remote devices.
Check the transponder. The siren will sound. Turn off the switch.
Exit setup mode by turning the ignition off or without pressing anything for eight seconds. One short and one long siren signal will sound. The LED will go out.
Turn on the transponder.

Standard system functions.

Standard System Features

• Dynamic code Super KeeLoq Pro II.

•
Separate control of security on/off modes.
• Possibility of programming up to four transmitters. • One five-button programmable transmitter with built-in interactive pager

rom and LCD display.

• One four-button programmable transmitter. • Active anti-robbery transponder (optional) • Valet push-button switch.

• Sound confirmation of
Valet mode.
• Two-level shock sensor.
• Small-sized siren. • Built-in side light control relay. • Built-in universal power output for controlling door locks. • Control of the car's central locking in Valet
and with the engine running.
• Three circuits of complementary interlocks
(installation of an additional relay is required).
• Two connectors for connecting additional sensors (impact, volume). • Six programmable channels
for controlling vehicle service devices

(additional locking, turbo timer, trigger channel, timer channel, power window control, courtesy light output, etc.).

• Two remotely controlled channels for controlling service devices. • Security when the engine is running.

• Remote control of the siren channel in security mode (disable/enable). • Additional (programmable) channel for controlling an external pager/executor

• Additional (programmable) input trigger of negative polarity. • Manually setting the system to full security mode

at any time using the button

Valet

even without the ignition key.

• Silent arming and disarming of the system. • Temporary disabling of shock sensors. • Temporarily disable the passive arming function. • Disabling the alarm from the remote control. • Remote control of Panic

in all modes. • Sound and light warning of system activation.

• Indication of alarm channels. • Sound and light confirmation of the execution of commands from the two-way communication key fob. • Limitation of false positives. • Limited alarm time. • Perimeter security. • Bypass the fault zone. • Multifunctional LED indicator. • Trigger memory. • State memory VALET, DISARM

(disarmed),
TRIGGERS
(state of inputs

protection) when the system power is turned off.

• Immediate alarm when power is turned off/on

systems in ARM

(security).

• Disabling the passive engine blocking mode from the key fob transmitter. • Trunk opening control

with temporary shutdown of sensors and channel

Prepared by AutoSet. Car alarms and car electronics.

Car alarm models

The most popular models are:

APS-2500 - comes with a shock controller and the ability to arm with the engine on and a separate charger.
ZX-750 - the model has a large range of action - up to 2 km in open areas.
ZA-1095 - the alarm is equipped with 4 service channels, a remote engine start function and improved theft protection.
ZX945 - dynamic signal protection against interception.
APS-2400 - one-way communication with the control unit, but this does not make this model less secure.
ZX-1055 - belongs to the multifunctional category with an increased number of communication channels and improved protection against theft. If hacked, the car's engine will be blocked.
APS-35PRO - includes all available functions from the manufacturer: two-channel communication, remote control, shock controller and others.

User manual

Car alarms are produced in the USA by Progressive Innovation Technology. Initially, the product was conceived as a budget solution, but, despite the price (up to 5 thousand rubles), it can compete on equal terms with more expensive models.

Main characteristics:

allows you to control the central locking from a distance;
turning on and off the security mode based on the key fob readings;
two-way communication;
several protection modes;
compatibility with satellite module;
presence of a shock sensor with an owner notification system;
function of starting and blocking the motor from a distance;
built-in protection against interception of the key fob signal;
recognition of the car owner when approaching;
setting the security mode even when the engine is running;
function of wiretapping a car dealership and recognizing vehicle movement.

These are only the basic features of the Sheriff car alarm; you should read the operating instructions for a complete list.

Has the following disadvantages:

If the batteries in the key fob are dead, it is impossible to set the alarm.
Difficult to install. It is not recommended to install an alarm in the trunk or engine compartment; this can lead to interference and poor interaction of the key fob with the control unit.
When you press the buttons hard, it turns off completely.
The signal is not always stable, sometimes it is armed only the second time.
Increased sensitivity of the sensors of some specimens.
Sometimes the door lock doesn't work.

Installation on a car

Before installation, you should decide on the future location of the Sheriff car alarm. The instructions suggest using the space behind the glove compartment or air conditioning unit.

It is not recommended to install it in other places due to the possibility of incorrect operation of the equipment. The control unit is held in place using ties and screws, these are included in the delivery.

And the siren is mounted in the engine compartment.

The hood latch must be attached to the vehicle body. The shock sensor is mounted behind the engine and before the jumper. The LED is installed in a visible place to scare off intruders with the presence of an alarm. The Valet button is located in a hidden but accessible place.

To connect additional sensors and options, you will need to connect the wires from the hood lock, ignition, and siren. Some car models will require cutting the car's locking system wires.

To correctly connect everything to the Sheriff signaling, the instructions will be very useful. And if you don’t have confidence in your abilities, then it’s best to contact a specialist.

This is interesting: How to choose and install a box on the roof of a car?

Alarm management

To control the car alarm, a special key fob is used that transmits radio signals with a command that is protected from reuse. Each time the button is pressed, it generates a new code; there is no point in intercepting it, since after a one-time use the system stops responding to it.

Most control key fobs have the following buttons:

security;
disarming;
control of the second channel;
turning off light and sound alarms;
starting and stopping the engine.

The alarm performs the following actions when the security mode is on:

When you open the trunk, door, or hood, the alarm goes off and turns on the lights and siren, all of which will work for 30 seconds.
When the vehicle is armed, the LED lights up and flashes slowly. This serves as a warning to an attacker without consuming much energy.
If you hit the glass or body, the alarm will sound.
When arming, the starter and fuel supply are automatically turned off. It becomes impossible to start the car even with the key.
For weak impacts, the alarm will only give a few warning signals.

The system automatically records all incidents and informs the owner. After disarming and inserting the key into the ignition, the blinking indicator on the car panel means:

1 - 2 times - the shock sensor or additional connected equipment was triggered;
3 times - the hood opening sensor was disturbed;
4 times - there was an attempt to open the doors;
5 times - the ignition sensor has tripped;
6 times - the trunk lock was disturbed.

When the ignition is turned on, all signals are automatically erased from the system memory.

Service mode

The service mode is controlled by the Valet button on the control key fob. It completely disables the system, which can be useful when taking the car in for repairs or parking. When the service mode is enabled, all functions are disabled except for lock control.

To enable it, you need:

disarm the car alarm;
turn on the ignition;
hold the Valet button pressed for 5 seconds;
the indicator on the panel lights up constantly;
When the ignition is turned on, a sound signal appears for a short time.

To turn off the service mode, just turn the key in the ignition and hold down the Valet button for 5 seconds, the indicator light on the panel will go out.

Additional functions

An emergency call can be made by pressing a button on the antenna module. The signal is transmitted via two-way communication to the key fob, which vibrates for 5 seconds. You can cancel it by pressing the “F” button.

When installing additional electric drives on door locks, the alarm can close them after turning on the ignition. The system is activated 3 seconds after turning the key. If any of the doors were open at that moment, then nothing will happen.

By installing a speed sensor, you can program the system to lock the doors when the vehicle is moving. The alarm will close the locks 3 seconds after the sensor is triggered. It will turn on every time one of the doors is opened while the engine is running.

To increase vehicle protection, you can use two-step owner identification. When activated, the “Disarm” function is carried out only after entering the password on the key fob.

If the siren is not needed, it can be turned off in security mode, and the system will emit light signals. This function is set by pressing several buttons, the combination depends on the model.

Engine lock

The engine lock is activated automatically 20 seconds after the ignition is turned off. The system will not work if the doors, hood are opened or any of the sensors are activated. You can disable this function by entering service mode.

The engine lock will be disabled if the engine is started immediately after shutdown. The function is activated by turning the ignition key, first a beep will sound for 15 seconds, and then the alarm will be activated. The process will be repeated every time you try to start the car.

When the ignition is turned on, the siren will sound for 6 cycles of 30 seconds each.

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To disable engine blocking you need to:

With the engine running, disarm the alarm by pressing the corresponding button on the key fob; this action is not carried out.
The function can be disabled by entering service mode. The switch-off does not occur immediately, but only after 20 seconds, during which time the alarm will be active.

Hidden capabilities of the "900th Sheriff"

Basic connection diagram

The instructions supplied with the Sheriff equipment of the model in question provide a diagram:

Shown here are two latching relays: one using normally open (NO) contacts, the other using normally closed contacts. Perhaps this amount of blocking is unnecessary. But once you connect as the instructions recommend, you won’t have to program anything. The Sheriff 5btx900lcd alarm system, also known as “ZX 900”, is initially configured for the cable connection option indicated above.

To implement a turbo timer, you will need one relay, the power contacts of which can be connected to the ignition circuit. Moreover, we are talking only about the use of normally open contacts (30 and 87). This relay can be controlled by one of the following outputs:

Programmable channel designated as CH6 (options F24 set to 2);
Blocking output of the Sheriff ZX 900 signaling, controlling a “normally open relay” (option F22 should receive the value 2).

According to the instructions, the first option is recommended. What is better and how to connect additional equipment to the Sheriff signaling is discussed further.

Selecting the optimal option, programming

Let's turn to the instructions and look at the diagram, which shows what exactly the contacts of the additional relay should close:

The Sheriff ZX 900 signaling system has a turbo timer initially. The duration of its operation is regulated by option F1. Wires IGN1 and IGN2, shown in the diagram, must be included in the car's ignition wire. The IGN1 cord, when connected to a standard lock, is connected to terminal “15” (not shown in the diagram). It turns out that it remains to consider what the winding of your relay should be connected to. Which is done in the next chapter.

Connecting the turbo timer relay coil

Let's say you have a 30 amp normally open relay and need to implement a turbo timer. Then, when choosing a control output to connect the relay coil, follow the algorithm:

If both a pager and a lock are used, one channel can control the behavior of the turbo timer relay - CH6 (set option F24);
If blocking is not needed, it is better to connect the winding to a black wire with a white stripe (program option F22);
Even when using blocking, you can do as indicated in point “2”, but then the blocking relay is connected to the “gray” wire (CH5).

Note that the Sheriff 5btx900lcd alarm system is initially configured as follows: output CH5 must control another blocking relay (N.R.). To control the pager, configure option F22.

The wiring diagrams for the winding contacts look simple:

These diagrams are not included in the instructions, but they are generally accepted. Everything that applies to electrical equipment is also true for Sheriff signals. Use the circuits by installing any low-current diode. The voltage value on it does not exceed 16 Volts.

When installing or switching any wires in the car, be sure to disconnect the negative terminal of the battery. This advice is also well known.

Signal programming

Having opened the instructions, you can immediately find a table of programmable options:

If function F13 is still assigned the value “code”, programming the Sheriff ZX 900 system is done as follows:

You need to disable the security mode and turn on the ignition;
The Valet button is pressed a certain number of times equal to the first digit of the code;
The ignition is turned off and on again;
Repeat “step 2” for the second value;
The ignition is turned off and on, then proceed to “step 3” from the previous sequence.

Pay attention to the important options: duration of the turbo timer (F1), assignment of the INST2 input (F16) and everything that is indicated in the text. It is clear that service functions are indicated by numbers whose value exceeds “13”. And everything that is less than 13 is user options, and nothing more.

Note that by turning off the ignition, the owner can interrupt the operation of the turbo timer at any time. To do this, press the “3” key on the key fob twice.

Programming a new key fob pager

If you intend to record the code of the anti-robbery transponder, then turn off its power before starting any action. In order to attach the key fob to the alarm control unit, disarm the car using a command from the remote control or by entering the code using the “Valet” button. When using a secret password, the pager is linked using the following algorithm.

Turn the ignition on and off. Turn it on again.
By pressing the “Valet” key, enter the first digit of the personal code (the number of presses is the first value of the password).
Turn the ignition off and on.
Using the "Jack" key, enter the second code value.
Deactivate and activate the ignition. A beep will follow.
Click "Jack" three times. There will be one long beep of the siren.
Press the 1st button of the first switch. A squeak will follow.
Repeat the previous step for the remaining remote controls.
Turn on the transponder. A siren will sound indicating successful actions. Turn off your device.
To exit programming mode, turn off the ignition or do nothing for eight seconds. One short and one long beep will sound. The LED indicator will turn off.
Check the transponder.