Sheriff ZX-750

Hello.

After the New Year, I planned to give my car a new alarm on March 8th. But it turned out that I gave it to her before Women’s Day arrived on March 8th! More on this later) In general, I had the most ordinary alarm system with three buttons on the remote control, of which only one worked, open/close. There were no bells and whistles. If the car is on guard, you can even beat it all up, take out what you need from the car, it still won’t sing the alarm melody! Dada right now they will say the mood is sensitivity - The sensitivity was at maximum and there was zero sense in it.

And so I started going shopping and figuring out how much money I would have to spend. All the popular brands are so expensive - ufffuhhh

... In general, I estimated the alarm itself to be 7,000 rubles + I immediately found out how much the installation would cost (4,000 installation only with feedback, 5,000 with autostart) And it turns out that the alarm costs over 10k. I decided to look at used signaling devices, they all had some kind of problems, the key fobs were lost, or the circuit board on the unit itself burned out... In general, Avito is not helping us (I got sick for two weeks, sat at home all day, went to Avito, looked at which condition they sell 2110, 2112... And somehow I accidentally came across the alarms... The prices were not written, well, I think it’s also a little expensive, or at least* a ruble cheaper than in stores. I called and said I’d like to pick up an alarm with feedback, he he asked me - With or without autostart?! I was thinking about installation, which would be more expensive... I asked how much the installation would cost, they told me that he would do it himself and we’d agree cheaper. Well then I answered, let’s go with autostart... He said that as soon as he selects good ones the alarm system will call back. two hours later he called back and listed what he had found, but in words I didn’t understand anything, and I went to the service center where he was located, it turned out that the father of a friend of mine, and he showed the alarm system Sheriff, I opened all the new wires, new key fobs ... In general, I took it for 3,500 rubles... Yes, the price is cheap... I asked if it was working?! (With a mockery) He told me, you’re coming to me to install it, and what’s the point of selling me shit?!) Well, really))) That’s how I got the alarm system with auto start)

The American Sheriff alarm system will reliably protect your vehicle from theft and other criminal attacks. An expanded set of functions will make driving more comfortable. The main drawback is the range of the main communicator, which in practice turns out to be less than stated.

Design and principle of operation

The alarm device includes a head unit, an antenna complex, control key fobs and some other elements, for example, an engine blocker. All Sheriff anti-theft systems have the following functions:

Vehicle condition monitoring. The system notifies the user using the key fob. The function works like this: if there is an attempt to steal or damage the car, the sensor transmits information to the head unit. The latter sends data to the key fob, on whose screen a message appears.
Remote control of the car. Depending on the alarm model, the system provides various options for remote engine starting. The user can send a command from the key fob, set the motor activation time, or set frequency indicators.
Security coding. The Sheriff car alarm operates using a separate channel. It is impossible to crack the security code using standard means.
Power window control. The function is implemented only in the presence of automatic closers.
Remote door opening. When the protective mode is turned off, the head unit sends a command to unlock the door locks and trunk.
Silent mode. When the anti-theft system is turned off and on, the system will not sound an alarm. By making the appropriate settings, the user can achieve automatic activation of the security mode when closing the doors.
Activation of alarm mode. At the same time, sound and light indications are triggered. The mode is designed to deter criminals.

One-way models

Simple models that do not have feedback have a minimal set of functions. 2 communicators are used for control.

Sheriff APS-2625 and 2400

Sheriff APS-2400 has the following features:

dynamic coding (the system has minimal resistance to hacking);
the presence of two-level sensors in the kit that quickly respond to an attempt to open or damage the vehicle;
the presence of a service button (this element is used to deactivate the alarm if the key fob breaks down);
the need to link each remote control to the head unit;
low price (a system with a basic set of functions costs no more than 3,000 rubles).

The Sheriff APS-2625 alarm system is equipped with the following options:

manual activation of protective mode;
manual disabling of security functions;
two-stage deactivation of protective mode.

If the key fob malfunctions or is lost, the system will have to be controlled manually. If necessary, the user can link up to 4 communicators to the main unit. The emergency mode is activated by pressing the emergency button. Impact controllers have 2 sensitivity zones.

Sheriff APS-2500 and 35 Pro

Sheriff APS-2500 is distinguished by the following features:

remote control of the alarm function regardless of the system operating mode;
accompaniment of pressing the service button with a sound notification;
protection of all parts of the car equipped with controllers (if the sensor does not work, the alarm system bypasses it).

The APS-35 Pro model is equipped with 2 auxiliary channels, which are used to connect adjustable interior and body parts. One connector is a power connector, which is rare among budget anti-theft systems. The set includes 2 keychains with shock-resistant housings. The functionality includes the following options and modes:

quiet and passive security modes;
Anti-robbery function;
two-level disabling of the security mode;
remote control of the “Alarm” option;
turbo timer;
separate opening of the driver's and passenger doors.

Key Features

Features specific to the Sheriff 750 anti-theft systems:

The anti-theft system controls nine security zones, which provides a high level of vehicle protection. The microprocessor module is equipped with a function to bypass faulty zones. When arming, the alarm performs diagnostics to identify problematic elements.
Possibility of passive activation of protective mode. When this function is enabled, sound and light pulses will not be triggered.
Ability to remotely activate and disable Panic mode. When it is turned on, the optical instruments of the car, as well as the system siren, will emit alarm signals, which will scare away potential intruders from the car.
Anti-grabber option. Will provide reliable protection of the car from theft and forceful seizure. The function is intelligent; if configured correctly, it will be able to detect a violent seizure of the car. The determination is made based on readings from motion sensors, the brake pedal and the parking lever. After turning on the function, after one minute or another time interval programmed by the user, the internal combustion engine will be blocked.
Possibility of step-by-step deactivation of the protective mode. You can disable only the shock sensor, and then other elements.
Option to search for a car in the parking lot. When activated, the car’s optical devices will blink a certain number of times, which will allow the consumer to find the car in a large parking lot.
Turbo timer. Maintains operation of the power unit after remote start. Its presence prevents engine wear.
Option to call the car owner from inside the car. By pressing a special button located on the transceiver, the driver will receive a call signal sent to the communicator.
Possibility of organizing independent opening of the driver's and passenger's doors when the security is turned off.
Availability of a passive immobilizer. The device is used to block the motor in case of an unauthorized start attempt.
System alarm mode memory. If there is a power outage or the battery is disconnected, then after its activation the alarm will automatically switch to protection mode.
Alarm alarm memory. The microprocessor unit is equipped with a memory module, which allows you to store information about all alarm activations in the absence of the owner. Using the communicator, the consumer will be able to find out which security zones were activated and what caused their activation.
Availability of Slave mode. Its use provides the ability to control the power saving system of the main communicator with feedback. This will allow the car owner to change the batteries in the remote control less often.
The communicator keys are locked. Will prevent accidental pressing of buttons when the pager is in the car owner's pocket.
Possibility of temporarily deactivating the sensitivity controller when the protective mode is turned on.
Ability to monitor the status of the R350 code module. This device is mounted optionally; the module is not included in the basic package.
Comfort option. Its correct setting will ensure automatic raising of the windows, sunroof and folding of the side mirrors. These devices must be electrical to work with this option.

Two-way models

The processor device of such anti-theft systems communicates with the key fob using a secure channel. The owner regularly receives messages about the condition of the vehicle. The data is reflected on the display of the control panel.

Sheriff ZX-945 and ZX-1090

The ZX-945 feedback alarm has the following features:

interactive signal coding, providing reliable protection against hacking;
high range of the key fob (signals are received at a distance of up to 2 km);
processor unit equipped with 4 communication channels;
the presence of a liquid crystal screen in the main communicator;
2 security modes: active and passive;
possibility of connecting 2 engine blockers (devices prevent criminals from starting the engine).

Commands from the ZX-1090 alarm key fob can be issued from a distance of 1000 m. The range of the communicator in receiving mode is 2200 m. The spare pager operates at a distance of up to 50 m. Dynamic dialogue coding prevents intruders from intercepting the signal.

Main characteristics and advantages of Sheriff alarms

The company produces a fairly wide range of security systems, the most popular are:

Car alarm Sheriff ZX-925 with feedback

Key features of the 925 include:

two-way communication;
programmable immobilizer;
protection of a vehicle with the engine running without a key in the ignition unit;
storing an alarm signal in memory;
software control of the ignition switch;
security mode without siren;
panic and comfort modes;
control of the security system within a radius of the key fob at a distance of 800 meters;
vibration mode of keychain pager;
key fob monitor backlight.

The delivery set includes the following items:

security alarm control unit;
keychain pager with monitor;
multi-tone siren;
chip key fob;
dual-zone shock sensor;
Valet switch;
2 LED indicators in the antenna unit;
push-button limit switch;
installation and operation manual.

The advantage of this model is the ability to reprogram the following functions:

active protection against theft and theft of vehicles;
immobilizer;
personal control code;
ignition switch mode in any key state.

Alarm set Sheriff model ZX-925

Car alarm Sheriff ZX-757 Dialog with feedback

Security alarm Sheriff ZX-757 is an interactive system with two-way dialogue communication and has the following characteristics:

remote control range - 2000 m;
possibility of connecting a CAN module;
vehicle search mode;
remote search for the car owner;
arming with the engine running;
Anti-theft function (works when the door is opened and the ignition is on);
silent transport security mode;
Possibility of immobilizer programming.

The package includes the following equipment:

motion and shock sensors;
main two-way communication key fob with LCD monitor;
hood and trunk limit switches;
set of installation wires;
safety block;
ignition lock relay;
antenna unit with LED indicator;
central module of the alarm unit;
installation and operating instructions.

The advantage of this model is its small size and fast data transfer.

Instructions for security system Sheriff ZX-757

Car alarm Sheriff ZX-945PRO with feedback

The budget system Sheriff ZX-945PRO with two-way communication and a range of up to 2 km with dynamic coding provides reliable vehicle security.

Has the following functions:

sequential opening of car doors;
re-locking the doors when the ignition is turned off in turbo timer mode and PIT STOP mode;
vehicle network voltage indication;
arming with the engine running;
the dialogue function provides reliable protection against grabbing with digital code replacement;
passive immobilizer mode using an LDT-920(S) card and a motion sensor;
programmable personal code for shutting down and controlling the system;
security when the engine is running (“Any Stop” function).

Sheriff ZX-945PRO is equipped with the following elements:

shock and movement sensors;
2 sets of key fobs - main and additional;
antenna unit;
Security alarm control unit;
set of conductors;
installation and operating instructions.

The advantage is the warning range and speed of control of the security alarm.

Alarm Sheriff ZX-945PRO

Car alarm Sheriff ZX-1070PRO with feedback and auto engine start

The Sheriff ZX-1070PRO security system has two-way dynamic communication and a remote auto-start mode for the engine.

This model has the following functionality:

security;
ignition unit blocking mode;
anti-theft event registration;
programmable immobilizer;
security when the engine is running without a key in the ignition unit.

The kit includes the following parts:

audio multi-tone siren;
two sets of control key fobs;
push-button limit switches for the hood and trunk;
vehicle gear lever position sensor;
electronic control unit for security alarm;
automotive microprocessor module for remote engine start;
set of wires for installation;
installation and operating instructions.

How to find out the alarm model

Having learned the model of the security system, the user will be able to purchase a suitable spare part or replace the communicator. You can identify the alarm using the key fob by opening this device. It is necessary to pry the latches and remove the top cover. The alarm model is recognized by markings on the board. The detected combination of characters is entered into the search bar of the browser and the types of security systems are determined. To find out the alarm model, you need to find the markings in the area of the antenna unit.

How to connect

According to the installation instructions, to connect the components of the anti-theft system, you need to perform the following steps:

mount all the elements (the head unit and service button are installed in a hidden place, the antenna complex is placed on the rear window, the siren must be connected under the hood);
stretch the wire going from the ignition switch to the head unit (a cable is used that receives voltage when the engine starts);
extend the wires of the limit switches and siren to the processor unit;
connect the ground cable (according to the car alarm connection diagram, a standard nut located on the body is used for this);
cut the standard cables used to control the door locks (such wires are laid from the unlocking switch to the locks);
connect the main switch wire to the green cable;
protect the wiring with electrical tape and corrugated tubes;
connect the antenna unit (the cable of this element cannot be inserted into the wiring harnesses that provide power supply).

User manual

The operating instructions for the alarm contain recommendations that allow you to use the system correctly.

Activation and disarming of security

The security mode is activated by briefly pressing button 1 of the key fob. The protective function is disabled using the same key. To activate the option while the engine is running, you need to start the engine and hold down 1 button on the key fob. To disable the function, press the key briefly.

Programming a new key fob

The control panel programming process includes the following steps:

Removing the security mode and starting the engine.
Press the emergency button three times. The system will confirm action 1 with a beep.
Hold down button 1 of the first key fob. The key is released after a long beep appears.
Long press button 1 of the auxiliary communicator. Completion of key fob programming is accompanied by a sound notification.

Changing your personal code

Before programming, the anti-theft mode is deactivated using the service button. After this, perform the following actions:

turn the engine on and off;
enter the first digit of the password by the required number of presses of the service button;
turn on the ignition;
using the emergency button, enter the second digit of the code;
turn off the ignition (the correct password entry is confirmed by a sound notification);
Press the service button 3 times;
press 1 key on the key fob (the system will notify you that a new code has been recorded with a sound signal);
turn on the power to the transponder (after the sound signal appears, the device is deactivated).

The programming menu is exited after 10 seconds of inactivity.

Emergency disabling of security

According to the instructions for use, to emergency disable the protective mode, you need to open the driver's door with the key. After the siren sounds, you must start the engine. 10 seconds after turning on the ignition, press the service button.

How to enable autorun

To enable the alarm to automatically start at a certain frequency, you need to perform the following steps:

press F twice;
switch to cursor control mode;
Press the F button again to confirm the selection of the desired indicator;
use the door lock button to set the required interval.

Malfunctions and their elimination

Problems with automatic start on the Sheriff ZX complex arise due to incorrect execution of the algorithm for setting the neutral position. The instructions for use require setting the lever to neutral and then applying the parking brake. On the remote control, you need to press the button with the text CH2 twice, then the driver removes the key from the lock and gets out of the car. After activating the security mode, the power unit automatically stops. If the configuration algorithm is violated, further autorun procedure is blocked.

Control failures occur due to a decrease in the battery charge level or due to exposure to airborne interference created by power lines or cellular stations. To disable the security mode, briefly press the programming button, which is performed after unlocking the door and turning on the ignition with the standard key.

If the driver has programmed the shutdown algorithm by entering a PIN code, then after unlocking the door, a cycle of turning on, turning off and turning on the ignition again occurs. The user then enters the first case of the password by pressing the programming key. After re-enabling the ignition circuits, the second register is entered using a similar algorithm. 10 seconds are allotted for entering each digit; if the driver does not meet the required limits, the procedure begins again. After entering the password, the ignition is turned on again, which turns off the alarm.

Possible problems and their solutions

If Sheriff alarms do not respond to commands sent from the key fob, you need to make sure that the antenna is installed correctly. It must be mounted at a sufficient distance from metal parts. An equally common problem is the false alarm of the siren. In this case, the sensitivity of the sensors is adjusted in accordance with the parameters specified in the instructions. If the doors do not lock when the security mode is turned on, check the condition of the wiring. Damaged cables are replaced.

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Remote engine start. Commands and functions

Engine start control in the ZX 1070 system

The automatic engine start function is integrated into the security system and is an integral part of it. To start the engine, it is necessary to make all the connections of the wires to the vehicle's on-board circuit that provide control of the engine starting function according to the diagram in the installation instructions.

When using the tachometer engine control mode, do not forget to program

Instructions for Sheriff car alarms

Security systems of the American brand SHERIFF are equipped with detailed instructions for use. Not every owner is able to turn on the alarm after installation. In such cases, it is recommended to contact the appropriate service.

Connecting the device

The principle of connecting the Sheriff alarm system with and without auto start is universal for all models of this brand.

The alarm must be connected in the following order:

Installation of the security system control unit. An electronic alarm module is installed in the free space behind the dashboard.
Installing a siren in the engine compartment. The speaker should be directed downward to better diffuse sound and prevent moisture from entering the device.
Installation of hood and trunk limit switches.
The shock sensor is installed between the smoke space and the vehicle interior.
All sensors are connected to the alarm unit according to the diagram shown below.

A red-blue wire is connected to the car's dimensions, then switched to the main security alarm unit. The engine start blocking relay is connected to the red wire.

Let's understand the purpose of the 6th contact

The sixth relay terminal is designed to connect the following options:

starter protection circuit;
Brake pedal emulation for remote engine start circuits for cars with automatic transmission.

Typical user mistakes

After long-term operation of the security alarm, errors were noticed only in the remote engine start system. The reasons can be different, ranging from poor terminal contact to software failure.

Table 1. Typical alarm errors Sheriff

Signal type and duration	Causes of malfunction
One short beep	Tachometer signal not programmed
Two short beeps	No handbrake position signal
Three short beeps	The manual transmission lever is not set to neutral
Four short beeps	Reserved
Five short beeps	There is no connection with the car hood switch
Six short beeps	There is no connection with the stop pedal switch
One long and one short signal	No battery charging signal for 60 seconds.
One long and two short beeps	There is no signal from the tachometer
One long and three short beeps	No signal from generator
One long and four short beeps	Stopping the engine when there is no tachometer signal
One long and five short beeps	Idle speed increased above 4000 rpm
One long and six short beeps	On-board voltage is higher than 16 volts
One long and seven short beeps	The security alarm went off

Software system setup

Programming the Sheriff security system is done as follows:

The car is disarmed.
Turn on the ignition.
You must press the Valet button on the key fob for 5 seconds.
After the sound signal, you must press the button again.
After the sound signal, turn off the ignition.

START/STOP button

The start/stop button is designed to start or stop the car engine. The engine is started by pressing the “start” button twice for 2 seconds. By pressing the “stop” button, you can forcibly stop the car engine. The engine running indicator on the key fob is a smoke indicator. This function is activated in the alarm settings.