When the OS 7 error appears on the Starline alarm system, the car owner should not panic - it can be fixed. To eliminate it, you just need to understand what it means. All modern models of Starline anti-theft systems, including the A93, are equipped with the ability to automatically start the engine from the key fob. For this function to work, it is necessary to properly configure the system and constantly monitor the correct execution of tasks by the alarm. If settings errors accumulate over time, the key fob displays the message OS 7 - this is information about a breakdown of the automatic engine starting system.
The appearance of OS 7 on the Starline key fob at startup
The system writes this text on the key fob screen (OS 7) and at the same time stops the automatic engine start.
Starline complexes rarely start producing this error in the first year or two after purchase. Usually problems appear quite a long time after the start of active use.
There are several main reasons why the system shows OS 7. Among them it is worth highlighting:
- problems with the operation of door limit switches;
- lowered state of the parking brake lever;
- incorrect operation of immobilizer crawlers;
- absence of a tachometer signal from the vehicle crankshaft rotation sensor to the main unit of the anti-theft system;
- absence of a response signal from the motor after its automatic start;
- problems with switching to program neutral in cars equipped with a manual transmission;
- problems with the operation of electrical contacts or other wiring breakdowns;
- low voltage at the battery output;
- winter freezing of lubricating oil;
- increase in static voltage during the cold season.
Problems can be caused by each of the listed reasons individually, or a combination of several.
Solving the autostart problem
The occurrence of OS 7 error most strongly affects the Starline car alarm's ability to automatically start the power unit. In most cases and for the vast majority of alarm models, including A92, A93, A95 and E90, the problem looks like this: the system prepares for starting and cranks the engine with the starter, it does it, but due to incorrect self-determination of the motor, it automatically turns off the ignition immediately.
If removing the error by disconnecting the battery is unsuccessful, they resort to flashing the communication unit with the CAN module or replacing it completely. In rare cases, the problem lies in a failure of the program that ensures the operation of the main alarm unit. If this is the case, then the only way to solve the problem is to contact an authorized service center.
The second way to control the start is by a signal from an LED lamp. In this case, the problem lies in a malfunction of the control relay installed on the battery. The only way to fix the problem is to replace the broken elements as soon as possible, otherwise the battery will very quickly be discharged.
Car owners whose systems are equipped with engine start control using a tachometer are often faced with the fact that the amplitude and duration of the tacho signal pulses are not sufficient to register revolutions, or they simply do not reach the alarm.
This problem occurs if the analog tacho signal input is connected to the injector of the power unit. In order for the signaling system to register the signal again, it is necessary to increase the speed, for which the tachometer input is switched to the control wire of the ignition system coils. As a last resort, change the control method. The manufacturer considers tachometer control not reliable enough, so initially it recommends not using it. The control method by connecting a wire to the positive or negative contact of the generator is considered quite reliable, but it can also fail if you do not first check whether this particular generator model begins to emit a signal even when cranking occurs. To find out this, test runs are suitable.
What to do if the car does not start with the key
Some motorists whose cars have Starline A92, A93, A94 and E90 systems are faced with a situation where starting the engine from the key does not work - only a cold start from the key fob or autostart functions. This situation arises for two reasons:
- Due to a broken ignition switch.
- Manual start blocking, which can be configured with 10 functions.
Each signaling model has its own way to enter the function settings, but in all cases the Valet service button is used for this. In the case of Starline A93, it is first pressed five times and the ignition is immediately turned on. Then press ten times to program options. And then, using the key fob, select the first or second option (depending on which one is already there) - respectively, with the first or second key.
Where can I repair it if I can’t do it myself and how much does it cost?
To repair a Starline car alarm, you can come to the service station yourself; many services today offer the service of calling a specialist. The cost of a call, depending on the station, can average from 500 to 2 thousand rubles.
Costs by region are shown in the table:
| Region | Price | Firm |
| Moscow | from 2000 rub. | "Auto diagnostic" |
| Chelyabinsk | from 1500 rub. | "You Do" |
| Krasnodar | from 500 rub. | "Key Auto23" |
How to fix OS 7 error on Starline key fob for other reasons
In addition to standard problems with autorun, the inscription can be caused by other reasons that lead to specific consequences. So, a car owner may encounter this problem due to problematic operation of the door switches. A feature of this malfunction is the immediate appearance of the “OST” message on the key fob screen without any initial attempts to start the engine. Incorrect operation of the limit switches leads to the fact that the car alarm detects a violation of security zones, believing that the car door is open.
A93 2CAN+2LIN the parking brake is not applied. Why is it on the handbrake?
A93 2CAN+2LIN on the remote control indicates that the parking brake is not applied. and the car is on the handbrake. why is that?
Answers 12
indicates that the parking brake is not applied
What if it’s not a handbrake? How did you check?
I turn off the car. I put on the parking brake. I go out and set security. the security indicator on the remote control and the letter “P” are on
Then everything will be like this, the brake/handbrake statuses are read only when ignition is started via CAN.
I put on the parking brake. I turn off the car. I go out and set security.
Please explain in more detail, I didn’t understand you.
first raise the handbrake with the ignition on and check the condition, and then you can turn off the ignition and arm
When you set the “P” indicator on the remote control to autostart, it doesn’t light up correctly. if you just turn it off and put the handbrake on, the “P” indicator lights up
Then everything will be like this, the brake/handbrake statuses are read only when ignition is started via CAN.
If I were you, I would connect the handbrake status analogously, this is the most reliable option so that such situations would not occur and do not forget to break the wire with a diode
Source
How to avoid OS 7 error
The best way to prevent the inscription from appearing is to correctly put the car in security mode. For what:
- put the car on the handbrake until the engine stops;
- remove the key from the ignition switch;
- leave the salon and slam the doors;
- close the door locks using the remote control.
- do not open the doors while the car is in program neutral or security mode;
- do not turn off the engine using the anti-theft system - it must do this itself;
- regularly clean and lubricate door switches;
- protect the device as best as possible from severe frosts in winter;
- do not allow handicraft, low-quality installation of alarms, without a guarantee;
- prevent battery failure.
If these simple rules are followed, the car owner will not have to deal with an OS error on the Starline anti-theft complex of any model to the last.
Starline car security systems are equipped with an automatic engine start system with control of operating parameters on the key fob screen. An OS 7 error that appears on the Starline key fob screen indicates problems with the launch system.
Possible causes of OS 7 error
Diagnostics and troubleshooting
Self-determination of engine operation does not work correctly
Incorrect operation of one or more door limit switches
Problems with the standard immobilizer crawler
What should I do to prevent OS 7 error from appearing?
Comments and Reviews
Lack of wave transmission capability
Sometimes situations arise when certain conditions do not allow the signal to be transmitted from the key fob to the starline radio. This situation can also include a dead battery on the control panel, but this is far from the only reason for the inability to transmit waves.
If the car battery is almost dead, then there may not be enough voltage for the security system to receive a signal.
Also, sometimes the key fob can fail if you frequently press the command buttons outside the signal range. Repeated pressing of the function buttons may occur involuntarily when the key fob is in the owner's pocket. If the battery is dead, recharging is necessary to fix the problem, and the problem can be solved for a short time if you bring the key fob as close as possible to the receiver. If the key fob fails, then solving the problem will be much more difficult, since you will need to purchase and configure a new control panel. In some cases, specialists can simply fix the problem, but it is almost impossible to solve the problem yourself. This car can only be opened with a key.
Possible causes of OS 7 error
Many owners of Starline alarms note that an error like OS 7 does not appear immediately. Often, autostart works properly for up to several years, and then unexpected failures appear.
The most common reasons are:
- incorrect operation of one or more limit switches on the doors;
- The parking brake lever is not raised;
- problems with the operation of the immobilizer bypass;
- the central alarm unit does not receive a signal from the crankshaft rotation sensor (tachometer signal);
- there is no return signal from the engine after starting;
- failure of the program neutral installation procedure (on vehicles with manual transmission);
- loss of contact in the wiring harnesses (for example, on the fuel pump lock);
- low voltage at battery terminals;
- increased static stress or frozen oil in the gearbox in winter.
What to do if the alarm system no longer sees the key fob after replacing the battery
The Starline alarm control device, in the design of which the power element has been replaced, may stop functioning or begin to work incorrectly. To get rid of this problem, you should check whether the service mode has turned on: hold down the key marked “2” for a few seconds. A certain number of headlight blinks will indicate that the service mode has been disabled.
Diagnostics and troubleshooting
Most of the problems that cause OS 7 error to appear on Starline car alarms can be found independently. In some cases, you may need the help of a specialist involved in setting up and repairing security systems.
Self-determination of engine operation does not work correctly
In case of incorrect self-determination of engine operation, the alarm, having completed preparations for the start and cranking the engine with the starter, will start it, but without detecting the fact of starting, it will automatically turn off the ignition.
Alarms determine the moment the engine starts to operate in several ways:
- according to data from the digital CAN bus;
- by the voltage value in the on-board network;
- when the battery charging indicator light turns on;
- according to signals in the tachometer circuit.
The control method implemented in the Starline alarm can be checked through the settings menu.
- Insert the key into the ignition and turn it to the AC position. Press the service button six times.
- Turn the key to the ON position. The siren will sound six times
- Then you need to press the Valet button 11 times in succession (programming engine operation control.
- The remote control display will display the value of the 11th parameter.
Troubleshooting
Troubleshooting depends on the method of monitoring the engine start:
- When monitoring via a digital bus, correct adjustment of operating parameters is required. When the battery voltage drops, bus errors are observed and recorded in the control unit. To clear errors, the battery must be disconnected. If the error cannot be removed, then the communication unit with the CAN bus must be re-flashed, and in some cases, replaced. The malfunction may also be caused by a malfunction of the central unit software. To correct the situation, it is recommended to contact a service center, where diagnostics will be carried out and the firmware will be reloaded. After this the problem disappears.
- When monitoring using a signal from a lamp, the cause of autostart failure is a malfunction of the relay regulator installed on the generator. To solve the problem, it is necessary to replace damaged elements, since long-term operation of the car on a battery is impossible.
- When monitoring the engine start using a tachometer, the alarm may not receive pulses or their duration and amplitude are insufficient for the system to register revolutions. In this case, it is enough to increase the speed so that engine operation is recognized correctly. The problem occurs if the analog tacho signal input is connected to the motor injector. You should switch the tachometer input to the control wire of the ignition coils or change the way the speed is controlled in the settings. The tachometer signal method does not provide high accuracy, so the manufacturer does not recommend using it to determine the start moment.
- A more reliable way is to connect the wire to the positive or negative terminal of the generator. It should be taken into account that some generator designs begin to give a corresponding signal even at the moment of scrolling. Therefore, it is necessary to clarify the most correct way to determine the start moment.
SMS alarm commands StarLine A93 from phone
The module update command is sent only from the device with the M1 index.
Having received the signal, the device connects to the StarLine server.
When connected to the server, the module sends a message to the M1 phone about the update progress, accepts the new software, interrupts the connection and performs self-programming.
After downloading the full update package, the device automatically reboots.
If the update is successful, a corresponding SMS notification will be sent to your M1 phone. The SMS format will look like this: Command code XY 0 0 Phone number where:
- command code for M1 - 0001;
- Y—SMS notification.
- X - voice notification;
When typing, the X and Y alerts are replaced with: 1—the alert is enabled; 0—disabled.
The software update takes several minutes, during which the module does not perform any functions other than updating the software. Changing or deleting numbers can be done using an SMS message sent from the priority phone (M1).
What should I do to prevent OS 7 error from appearing?
After parking and arming you need to:
- Without turning off the engine, put the car on the handbrake.
- Get the key from the lock.
- Get out of the car and slam the door.
- Lock the doors using the key fob.
The owner has several ways to reduce the risk of an error:
- after carrying out the procedure for installing the program neutral and turning on the security, you cannot open the doors;
- allow the alarm to turn off the engine on its own;
- clean and lubricate limit switches;
- take care of protection from the cold in areas with severe frosts;
- install alarms in official services that provide a guarantee for the work performed;
- Maintain battery charge level.
All of the above methods do not provide a complete guarantee against OS 7 errors.
General problems
Why else might the Starline A91, A93, A61 or any other alarm system not work on your car?
- Wiring is damaged. First of all, check the circuit in the area of the central lock and its actuators (limit switches). Pay special attention to the connection points of the plugs, contact pads, the area where the wires are connected and the central module.
- Radio interference. It is possible that your Starline A9 alarm does not work temporarily while the car is in the range of strong transmitting devices. They create powerful interference that interferes with normal data exchange between the key fob and the system module antenna. Which zones are considered “deaf” for radio signals by default? Airports, railway stations, sensitive facilities, large factories and production bases. Interference is also present in covered underground parking lots, areas with voluminous reinforced concrete structures, etc. For the Starline alarm to start working normally, evacuate the car to a “clean” place. Check to see if the key fob will work if you approach the car right next to it (then you won’t have to call a tow truck);
- The central locking mechanisms are broken. In this case, the alarm and key fob work normally, but the doors do not open. Check the wiring of the lock and the drives that are responsible for locking/unlocking, test the circuit with a multimeter, and make sure that the limit switches are functioning properly. If necessary, contact an auto electrician.
- The security system stopped working after you manipulated the battery. Let's consider what to do if the Starline alarm system malfunctions due to a nutrient element. First, put the unit on charge. At the same time, let specialists diagnose it for serviceability and ability to retain charge. Next, connect correctly. Be prepared for the need to re-program the key fobs (see the technical manual for the algorithm).
Now you know all the reasons why the Starline a91 alarm system may not work or work incorrectly. If independent diagnostics and repairs do not help, you will have to take the security kit to a service center.
Handle the alarm with care. Do not expose equipment components or wiring to excessive moisture. Every few years, clean the connectors, check the connectors, and clean dust and dirt from the internal compartments of the module. Periodically check the wiring and cables for breaks, breaks, or oxidation. Handle the key fob and tags with care. Long life of your alarm!
Video
An overview of Starline errors is provided by a video filmed by the author Roma Vug.
Security systems use a diagnostic system that displays an error code on the communicator display. The error “OS 7” displayed on the Starline remote control display (incorrect designation; the text “OST” is activated on the display, in which the letter “T” visually resembles the number 7) indicates a malfunction in the automatic engine start module.
What does the "OS 7" error mean?
If the Starline A93 alarm remote control writes “OS”, then the code indicates the following malfunctions:
- oxidation or destruction of contact elements or cables of switches installed on doors or in their locks;
- breakdown of the limit switch located under the brake lever;
- malfunctions during the operation of the standard immobilizer bypass unit;
- a problem with the operation of the switching circuit connecting the processor unit and the shaft rotation sensor;
- Feedback from the power unit during startup is not implemented;
- erroneous reservation of the neutral position (only for cars with a manual transmission);
- lack of power in the switching harnesses;
- voltage drop in the on-board circuit is below the permissible threshold;
- Difficulty turning the shaft due to frozen oil in the gearbox.
Emerging radio interference
Radio interference is also a common reason why the Starline security system does not respond to commands. If the car or its owner is in an area of radio interference, then the alarm may most likely not respond to the command. Interference usually occurs near certain enterprises, secret facilities, and also near airports. Also, a large concentration of cars with security systems in one place can create strong radio interference. Such situations often arise in the parking lots of large shopping centers. Reducing the distance between the signal receiver and the key fob as much as possible can help solve the problem. If you bring the key fob as close as possible, the alarm may respond to the command. If such actions do not help, then all that remains is to tow the car to an area where there is no interference. Then there should be no other problems with the operation of the alarm, and you can safely open your car and start the engine.
Diagnosis and what to do to solve the problem
The driver of the vehicle can independently remove the OS 7 error by checking the functionality of the components of the security system. Car owners note cases of blocking the operation of the power unit or spontaneous activation of the security mode when the car is moving. In this case, you need to activate the service mode, and then contact a service that specializes in the maintenance and installation of Starline security systems.
Self-determination of engine operation does not work correctly
If the engine condition is incorrectly determined, the motor shaft is cranked with an electric starter, and then the engine starts to work. In the absence of a feedback pulse, the power unit stalls, which leads to the appearance of error “OC 7” on Starline. The solution to the problem is to change the algorithm for checking the operation of the motor.
To determine the parameter assigned during programming, you must perform the following steps:
- After turning the ignition switch to the AC position, press the Valet switch 6 times.
- Set the key to the active ignition position, which will cause the siren to emit 6 signals.
- Submit a request by pressing the settings button (11 times). Wait for feedback; the display will show the value of the programmed parameter.
- Set the operating parameter; it is recommended to set the control via the tachometer or via the car’s digital bus.
Incorrect operation of limit switches on doors
A common reason for the appearance of the “OS 7” code on the Starline key fob is a malfunction of the limit switch located on the doors or trunk lid. After locking the doors and turning on the security mode, the engine continues to run (similar to the turbo timer). To check, you need to turn off the turbo timer (if the function was active).
Then the neutral position reservation algorithm is passed through. The control diode operates in continuous mode when the parking brake is applied; when the door is unlocked, the lamp goes into flashing mode. After the door is locked, the indicator goes out, and after the protection mode is turned on, the power unit stops. The A93 alarm system provides switch interrogation. With the doors open, the handbrake is applied, the ignition is turned on, and button 3 (with the triangle symbol) is pressed. The faulty panel will not be displayed in dark color on the display.
Problems with the standard immobilizer crawler
To ensure starting the engine without a key, an immobilizer bypass is used, which emulates the signal from the standard key. In the event of malfunctions, the operation of the starting and ignition circuits is disrupted, and the code “OS7” on the display indicates to the owner the problem that has arisen.
To check the operation of the device, it is recommended to start the engine with the key in the lock.
Then the location of the crawler is determined, the chip located inside is checked and the state of the power circuits is tested, and the position of the immobilizer antenna in the lock is monitored.
Setting the sensitivity of the shock sensor
Those who have often encountered the problem of the shock sensor constantly triggering have most likely already tried to adjust it. Yes, there are times when it is too sensitive and requires optimal reconfiguration. However, it happens when the settings are reset spontaneously. But there may be several most common reasons for this alarm behavior:
- close proximity of the sensor and module cables. You just need to install them as far apart as possible.
- Weak fastening. When the tilt sensor is placed on an insecure mounting such as wires or tape, the installation will not work properly.
- Fastening on plastic. If the device is attached to plastic, then any external influence will cause a malfunction, even a change in temperature.
Sensitivity may be increased due to moisture ingress. This is possible even if one of the locks gets wet. To get rid of such a malfunction, you need to find out exactly what the lock is causing.
Don't forget about the wear and tear of the system. In many cases, it is better to replace the sensor, and if that does not help, look for another cause.
The most annoying thing is if you received a defective sensor. In this case, only replacing it will help, and it is advisable to do this before the warranty expires. In the service, the owner is required not only to replace the broken part, but also to set up the entire system again completely free of charge.
Other errors of this model
Additional codes are shown on the remote control display. The driver, based on the information received, checks the components of the security system and independently eliminates malfunctions. Please note that a number of error codes do not indicate malfunctions, but are service messages.
The appearance of the message R99 on the Starline A93 alarm key fob is not an error code. The indication indicates the activation of unlimited support for the ignition circuits during the process of reserving the program neutral. If the code is displayed on the display after automatic startup, then the reason should be sought in a failure of the information exchange channel between the communicator and the head unit. To restore functionality, it is recommended to turn off and then turn on the power to the remote control (by removing and installing the battery).
SP or 5P
SP (misread as 5P) indicates a failed automatic or remote start attempt. The problem occurs at low air temperatures, when the battery charge is not enough to intensively crank the crankshaft, and fuel vapor condenses on the electrodes of the spark plugs. The defect also occurs when the engine start reservation algorithm is incorrect (on machines with a manual transmission).
U9N L9N
The U9N code is displayed on the screen at the time of arming in the active automatic start mode (the neutral programming procedure was completed successfully). When you try to interrogate the complex, the display shows icons of the active security mode with a siren sounding. If the driver locks the car with the remote control in normal mode, the text does not appear. The cause of the defect is an incorrect algorithm for monitoring the operation of the power unit (by voltage). After programming the tachometer control, the problem disappears.
If L9N is written on the display and the stop does not work after arming, then polling the state of the security complex is simultaneously blocked. To solve the problem, you need to check the switching circuits. When connecting negative power to the standard wires, the signal may disappear, which is perceived as the presence of the driver in the cabin. After connecting the appropriate cables to the car body, the defect disappears, the engine starts remotely or using automatic algorithms.
The communicator issues an SLA code (erroneously called SIA due to the font on the display) when Slave mode is activated. If the driver turns on the security equipment with the standard key, the communicator receives a feedback signal from the alarm system. A similar message appears when the security system is disarmed, which is not a malfunction. If autostart does not work when the code is displayed, you should check the settings of the central unit and the reliability of the installation of patch cords.
How to identify and change a dead battery in a key fob
The first thing you need to do when the alarm key fob does not work is to pay attention to the state of its battery, the insufficient charge of which is not able to ensure full signal transmission to the security system unit and, accordingly, it will not operate. You can determine the state of charge of the power supply by the dimming screen of the key fob or on the corresponding indicator icon. This malfunction can be eliminated by replacing the battery, after which the key fob can be fully used. It is changed using a small screwdriver, which is used to unscrew the screw connecting the halves of the key fob to each other. Having unscrewed the screw, the key fob is carefully disassembled and access to its power element is opened, which must be picked up and pulled out from the workplace, installing a new one there, and reassembling in the reverse order.
