Sheriff alarm connection diagram with auto start

Sheriff security systems, if the number 1000 or higher is indicated in the name, are always equipped with an automatic start option. Judging by the reviews, for most owners all options work reliably, but problems usually arise with autostart. Any Sheriff car alarm is a rather complex programmable device capable of tracking and remembering events perceived through different channels and inputs. Some people, for example, connect signal inputs directly to ground, and then wonder why they cannot autostart. It was decided to list all such errors in the text. Happy reading.

The alarm must be used correctly

Alarm units belonging to the Sheriff brand and equipped with auto start have a gearbox selection loop. It is easy to notice that the statement is not true for all devices of the family in question - sometimes software settings are used. In a car with a manual transmission, the owner must perform certain actions, and only then will autostart be allowed. All connections, moreover, are made according to the basic diagram, which is true for any car.

We hope everything is clear here.

Each Sheriff alarm key fob is equipped with a key that allows you to immediately perform a remote start. For most models, this will be the Ch2 key, which is pressed twice. By the way, the sequence discussed above is suitable for a car with a manual transmission. But a car with an automatic transmission can also be equipped with autostart. The Sheriff 1000 car alarm, for example, in the options table has a special setting SF14, which allows you to select the type of gearbox. Initially, the value is set to “1”, that is, “Manual gearbox”.

The owner of a car with an automatic transmission is required to perform the same actions as listed in the text above. But at the same time, as stated in the instructions, the engine stops immediately, and you can leave the cabin at any time.

About connection and programming

Let's look at the part of the diagram where the “power connector” is shown:

The “red-blue” cord receives power for the “dimensions”, and then it is switched inside the main unit. And the current flowing through the “red” wire is switched by 4 built-in relays (see figure). The standard circuit protection with the “red” wire should be rated at 30 Amps or less. Everyone knows how to connect every cable except the “purple” one. But it is useless to connect the “purple cord” to the “15/2” terminal, if we talk about standard locks. Options for its connection are discussed below.

Let's understand the purpose of the 6th contact

The text of the instructions indicates that the “IGN3” contact can either duplicate the “IGN1” terminal, or it is used to control additional equipment. The latter in this case includes:

1. Starter protection line: current enters it after the engine starts, and the line breaks simultaneously with the ignition being turned off. Note that when starting from the key, the line remains open.
2. From the “IGN3” terminal you can remove the voltage used to emulate pressing the brake or clutch. The option is in demand if installations with a “START/STOP” button are equipped with autostart.
3. The “IGN3” wire can receive a pulse that coincides in time with the end of the motor operation in the security mode. The pulse duration is controlled by software.

You will need to choose one from several algorithms. What is done even before connecting the wire itself, but after installing the signaling in the car.

If there is a terminal that duplicates the “IGN1” contact, it must be used to control the crawler, which allows you to “deceive” the standard immobilizer and start the engine. This statement is common, but in this case it is not true. The ZX-1070 alarm, for example, is equipped with a separate output, indicated in the first diagram by the abbreviation “Immo”. By the way, the algorithm can be configured in different ways, and in the instructions it is designated as “CH4”.

For anyone who doubts what was said above, here is a screenshot of the basic guide.

Let us note once again: in the diagram, the crawler’s output is indicated by the abbreviation “Immo”. In the table, the same wire is called the “CH4 line”.

Typical user mistakes

The design of the Sheriff system, equipped with auto-start, provides for the following protection: if the engine was started automatically, then switching to alarm mode will result in its shutdown. Everything looks logical here, but now let’s look at another situation when theft protection is not active. In the “disarmed” mode, the engine can be started at any time. But if you open the door when the engine is already turned off by the system, this feature will be canceled. The latter is true for cars with a manual transmission, and bypassing this protection is easy:

1. After unlocking the door, the engine is started “with the key”;
2. The ignition is turned off, the “correct exit” procedure is repeated again (see above).

This is what the features of Sheriff brand alarms look like.

The system stores error codes caused by the owner and related to autostart in its memory. The decoding of all codes is given in the basic instructions:

To find out what the last error code is, you need to switch the system to programming mode. We are talking about programming options related only to autorun and not related to protection functions. How to enable this mode is described in the manufacturer's instructions. Here you should read the next chapter.

Software system setup

So, let all connections be made according to the basic diagram. Cord “6” coming out of the “power terminal block” can remain free. Let's open the instructions and see how to program options related to autorun:

1. The system is disarmed and the ignition is turned on;
2. Within 5 seconds, the Valet service button is pressed 3 times;
3. After the sound signal, the Valet button is pressed again;
4. The ignition is turned off within 5 seconds, and after the sound signals are turned on again.

Peculiarities

How to connect an alarm with feedback and auto start to a car, how to set up the start, how to turn off the device and what is the best way to install it? First, let's look at the features of the system. The Sheriff car alarm is produced by Progressive Innovative Technology from the USA. As a result of numerous tests, the alarms of this brand have shown their effectiveness and functionality. Initially, the Sheriff car alarm was conceived as a budget anti-theft system.

• availability of two-way communication on almost all modern models;
• car alarm allows you to control the central locking remotely, locking the car doors;
• work with the satellite module;
• the car owner can set and disable the security system, while relying on the readings of the key fob;
• active and passive modes for installing a car on protection;
• if the Sheriff car alarm has an automatic start function, then the driver will be able to start and block the engine from a distance;
• The kit includes a shock controller with an alert function;
• the ability to recognize the owner of the vehicle at a distance when approaching the car;
• reliable protection against signal interception and scanning, which greatly increases the safety of the machine;
• the ability to set a security mode on the car even if the engine is running;
• the possibility of motion recognition, as well as wiretapping of the vehicle interior with further notification to the car owner (the author of the video is the Avtozvuk.ua channel - Avtozvuk Database).

These functions are typical for almost all signaling models.

“Sheriff” with auto start and connection to Mitsubishi

Sheriff car alarms (the term “security systems” is of little use to them by modern standards) is a classic example of budget devices in the lower price segment, which are purchased solely on the principle “so that the doors open and the LED blinks, maybe they won’t get in”). Frankly outdated models continue to be supplied under this brand: for example, the Sheriff APS-2500 alarm system still uses the Keeloq algorithm, which did not protect against code grabbers even ten years ago. In more “fresh” and complex systems, instead of real technical improvement, cheap marketing tricks are used, misleading the average buyer.

As an example, the instructions for the “Sheriff ZX-1090 PRO” alarm system indicate the use of a certain DISARM DIALOG code in it. From the buyer's point of view, it is logical to assume that we are talking about dialog code, which is now considered to be maximally protected from intellectual hacking. In fact, the dialogue code (of dubious complexity) is used here only in the main key fob: for normal use of the entire set it has to be turned off (!), otherwise the additional key fob will not disarm the car.

It is impossible to talk about a full-fledged dialogue code at the level of StarLine systems (in the design of Sheriff key fobs there is obvious mimicry with the second generation StarLine systems) or Pandora.

Only the latest Sheriff models like the ZX-1095, which provide for working with a CAN bus and validating a transponder tag, can be called more or less meeting modern requirements. However, it is still equipped with an additional key fob without dialog code support, and to fully use both key fobs you have to switch to a primitive dynamic code. Thus, Sheriff cannot provide any significant competition in the middle price range, and in fact, the main sales of this brand fall on the most budget lines.

Overview of models and operating and installation manuals

Sheriff APS-2500

An extremely primitive system without feedback, which is controlled by two key fobs with minimal functionality: one button controls arming/disarming, the second activates an additional channel, and in combination with the first, it implements arming with disabling sensors or silent mode.
This “Sheriff” alarm system can actually be considered a radio-controlled central locking module with a tiny share of security functions. With a standard installation, it is not at all difficult to disable it if the machine is hacked. Just look in the instructions to see how to disable the system without using a key fob:

1. Open the door with the key.
2. Turn on the ignition.
3. Press the Valet button within an interval of no more than 10 seconds.

Therefore, for the owner, setting a secret code is a mandatory measure to ensure at least some security. Here its length is fixed, two numbers from 1 to 9, which theoretically gives 81 different combinations. However, the instructions prohibit choosing the number 3 as the first digit of the code, which reduces the number of combinations to 72.

To set a secret code, you need to disarm the car:

1. Turn on-off-on the ignition.
2. Dial the first digit using the Valet button.
3. Turn off, then turn on the ignition again.
4. Dial the second digit.
5. Turn off and turn on the ignition.
6. After waiting for a short signal from the siren, turn off the ignition again.

But in order for the alarm to start working with a secret code, you need to activate the corresponding function:

1. After disarming the car, turn on the ignition.
2. No later than 3 seconds later, press Valet three times (this is why you cannot use 3 in the first digit of the secret code).
3. Turn off and turn on the ignition.
4. Press Valet 9 times, going to the F9 function.
5. Press the main key fob button - the system will give two siren signals, indicating that the F9 function has been switched to value 2 (secret code).

The procedure for disabling the security status using a secret code is the same as entering it.

Installation instructions for alarm system Sheriff APS-2500

Sheriff APS-2600

A minimally modernized version of the APS-2500, which now has arming and disarming buttons on the key fob of the same design.

Installation instructions for alarm system Sheriff APS-2600

Sheriff APS-35 PRO

The system differs from the APS-2500 model only in the updated design of the key fobs, where the arming and disarming buttons are separated, and the presence of a built-in power relay for an additional channel in addition to the low-current output. The remaining capabilities and level of protection of this alarm system are in no way superior to the APS-2500. True, the restriction on the first digit of the secret code has been removed, which, however, cannot be called a serious achievement.

Installation instructions for alarm system Sheriff APS-35 PRO

Sheriff ZX-750

Two-way communication system on the main key fob. Operates with wideband modulation on the 433 MHz band without using any form of dialog code. In modern urban conditions, this reduces the radius of reliable communication, and you can’t count on protection from code grabbers even more so. The only more or less relevant protection function is the control of a digital blocking relay, which, however, is not included in the package.

Complete sherriff alarm circuit diagram

At the final stage of installing the system, the antenna wire is stretched to its maximum length, which is secured with fastening ties in a place where it is difficult to accidentally damage it. Please note that in order to avoid spurious interference, it is strictly forbidden to wrap current-carrying harnesses and individual wires with the antenna cable. Our manual is suitable for the following models:

• Sheriff ZX-1095
• Sheriff ZX-945
• Sheriff ZX-935
• Sheriff ZX-755
• Sheriff APS 2400
• Sheriff APS-35PRO Platinum2
• Sheriff ZX-750
• Sheriff ZX-1070
• Sheriff ZX-1055
• Sheriff ZX-1060
• Sheriff APS-35PRO Platinum1
• Sheriff ZX-940
• Sheriff ZX-1090
• Sheriff ZX-725 ver.2
• Sheriff ZX-925 ver.2
• Sheriff ZX-910 ver.2
• Sheriff Lady ZX-800
• Sheriff ZX-710 ver.2
• Sheriff ZX-1050
• Sheriff ZX-600 ver.2
• Sheriff ZX-625
• Sheriff APS-35PRO
• Sheriff APS-25PRO
• Sheriff APS-2600
• Sheriff APS-2625
• Sheriff APS-2500
• Sheriff ZX-950
• Sheriff ZX-930
• Sheriff ZX-900v2
• Sheriff ZX-700
• Sheriff ZX-730
• Sheriff PRO-9250
• Sheriff APS-35PRO Silver
• Sheriff APS-2600 Ver.2
• Sheriff APS-2500 Ver.2
• ff APS-35PRO Ruby

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.

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.

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).

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:

1. Installation of the security system control unit. An electronic alarm module is installed in the free space behind the dashboard.
2. Installing a siren in the engine compartment. The speaker should be directed downward to better diffuse sound and prevent moisture from entering the device.
3. Installation of hood and trunk limit switches.
4. The shock sensor is installed between the smoke space and the vehicle interior.
5. 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

Software system setup

Programming the Sheriff security system is done as follows:

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

Possible faults

Despite the reliability of the Sheriff alarm system, its elements can fail.

The following problems are possible:

• sometimes the security system with feedback does not catch the signal from the key fob, or it is possible to catch it only the second, and sometimes even the third time;
• problems arise due to the high sensitivity of the sensors;
• In order for the key fob to work, you have to press the button hard;
• During arming, the windows are not blocked or the locks do not close completely; you have to close them yourself.

If problems with the alarm are identified immediately after purchasing and installing it on the car, you should return it to the seller or exchange it for a working one. In case of serious problems after prolonged use, it is better to contact a specialist.

Car control key fob

Download installation instructions for Sheriff alarm systems for different models in PDF format

You can download service manuals for setting up and managing Sheriff car alarms using the following links:

Contents of delivery

Operating and configuration instructions, as well as the user manual (we recommend reading carefully).

Key fob with two-way communication channel and TFT screen.

• Set of communication cables.
• Spare keychain.
• Siren (installed optionally).
• Main block.
• Hood or trunk button.
• Antenna module equipped with LED indicator.
• Service key "Valet"
• Dual zone shock sensor.

How much are

The Sheriff security system is relatively inexpensive compared to other manufacturers.

Table 2. Sheriff’s pricing policy by region of the Russian Federation