Error 6060 VAZ 2114

Error 1602 VAZ - Interruption of on-board network voltage

Error P1602 on the on-board computers of VAZ 2114, 2110, Kalina vehicles means “On-board network voltage interruption” .
Specifically, the on-board computer recorded a temporary, short-term lack of voltage. The problem can lead to battery drain, voltage drop and other problems. One of the most annoying problems is that the car won’t start at all. Let's figure out the reasons for this error. Most often, the error is associated with poor contact of the wires to ground, from the generator or on the battery terminals. In simple terms: there is contact, but there is no contact. Therefore, to correct error 1602 on domestic cars Niva, Priora, Grant , etc. contacts need to be cleaned .

The main contact from the generator, which should be thoroughly cleaned. It is located below all other contacts and most often loses contact.

The wire is to ground, look for it from the negative mark. The wire will go to the housing.

Check the contacts on the battery terminals and, if necessary, clean them of oxides.

If you solved the problem in another way, share it with us in the comments.

Forum → VAZ → 2110 → Car service

Error 1602 appears (loss of mains voltage in the controller), while the car is working normally, I cleared the error by removing the terminal from the battery, the error is erased but appears again after a while.

I installed a battery (new) from another car, cleaned the terminals, checked the circuit from the battery positive to pin 18 of the control unit (fuse link, fuse), the result was the same.

Bosch MP7.0 controller.

What could be wrong with the controller?

I advise you to double-check the generator, perhaps the diodes are faulty, check the voltage at the terminals again, it should be 13.7-14.0 V. In general, error 1602 often pops up when the battery is disconnected from the power supply, there is nothing wrong with this error, it will disappear on its own after a while, they fall into the category of “good mistakes”. Perhaps the error occurred due to a large voltage drop during startup (bad battery, cold, thick oil, etc.), due to the voltage drop, the unit automatically increases the opening time of the injectors to compensate for the fuel supply. Check the ground on the ECU, either because of it or because of the TPS.

I advise you to contact an authorized dealer who has the necessary diagnostic equipment and qualifications. As a rule, this is cheaper than long agony.

I also have the same problem because of code 1602. I remove the terminal from the battery and put it back after 15 minutes (I give it a wait), and still, immediately when I turn on the battery, it shows code 1602. I looked at the masses, it seems that they are pressurized everywhere and are not oxidized. I don’t even know what to do. And diagnostics are very far from home. Yes, by the way, what voltage input should be at the input to the controller at terminal 18? And what output from the generator should be no less and no more?? Please help me.

to fatim-sergey: Has the car’s behavior changed? Regarding the indicators, I think it’s better to look in a book. But don’t worry, there is nothing fatal about this error.

For no apparent reason, the car stopped showing signs of life at the moment of ignition. The battery works - all the lights are clearly lit. The BC showed 1602, after disconnecting the battery it malfunctioned and froze. Help!

to drCE: error 1602 - loss of mains voltage in the controller. Accordingly, the issue is most likely in the wiring.

Error P1602

Error p1602 stands for “Control system controller, board voltage interruption.” In practice, this means that somewhere in the car’s electrical network a contact has disappeared, most likely a “minus” one. Most often, error p1602 occurs on domestic VAZ cars, starting from the tenth model (VAZ-2110) and higher - on Kalina, Priora. The difficulty of diagnosis lies in the fact that the electronic scanner is not able to show in which particular area or specific device the on-board voltage has disappeared. Therefore, localizing the location of a breakdown sometimes takes a lot of time and effort.

What does error code P1602 mean?

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Error P1602 is diagnosed on cars when one of the on-board voltages is not supplied to the engine control unit (ECU). Various options are possible: both permanent absence and short-term outages (one-time or periodic).

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As a rule, the control unit receives voltage via several buses:

What does error code p1602 mean?

Error p1602 means that the electronic control unit (abbreviated as ECU) lost power for some time. At the same time, it is important to distinguish whether it disappeared in emergency mode or was authorized. It is also possible that problems arise in certain areas of the machine’s electrical wiring, causing the power to be lost to the control unit. For example, this could be a relay, battery, generator, broken wires, overload of the electrical system by consumers, and so on.

In most cases, error code p1602 is harmless and does not affect the behavior of the machine. In this case, the Check Engine light on the dashboard does NOT even activate The “controller voltage interruption” error can occur even when simply removing the negative terminal from the battery to reboot the electronic control unit, but not always (depending on the car, ECU firmware, and so on).

In some cases, it is noted that the car has difficulty starting, especially in cold weather. Therefore, it is advisable to diagnose a breakdown as early as possible, since any minor malfunction can cause significant wear and tear on other engine elements, including expensive ones.

It happens that with such an interruption in the power supply to the electronic control unit from the on-board electrical network, data from the RAM is lost. Then a situation arises when up-to-date information about the lambda probe, knock sensors, misfires, idle speed and others disappears from its memory. Accordingly, after restoring power to the controller, it may generate errors associated with the engine elements listed above. Then the codes should be cleared and when they are entered again, you will need to check the power circuit from the battery to the controller. In VAZ cars this is contact No. 18.

P1602 loss of supply voltage to the Priora controller

Error P1602 on cars of the Lada Vesta family signals a one-time or repeated loss of supply voltage.
This type of error is not displayed on the dashboard using a special LED, as a result, it can only be detected by connecting using diagnostic equipment. Error P1602 can occur even during normal use of the vehicle, for example, when the terminal is reset from the battery. In such cases, this error only indicates a single voltage loss, which does not entail any serious consequences. However, in order to clarify what exactly caused this code, you need to reset the errors using a diagnostic device and monitor its possible occurrence for several days. If the error reappears, and you did not open the car’s power circuit in any way, then the problem lies in one of the components of your car and requires a solution. If error P1602 is recurrent, the following elements may be faulty:

Fuse F70 (60A)
Controller
Power circuit

All error codes for cars of the Lada Vesta family can be viewed on this page. The error is detected by the dealer using the following algorithm: first of all, the integrity of fuse F70 is checked; if it is intact, proceed to check the power circuit. The cable harness block is disconnected from the controller, after which the car’s ignition is turned on and contact “X1.1/A5”, which is connected to ground, is checked using a probe. If the result is negative, proceed to checking the circuits connected to the ignition switch and the controller. If the result is positive, the car’s ignition is turned off again, the harness block is reattached and the diagnostic device is reconnected. In the program, select the “Signal monitoring” section; ADC Battery Voltage” and measure the voltage of the on-board network; if the device shows that the network voltage is close or even equal to the battery voltage, then there is no malfunction as such. In cases where the network voltage differs significantly from the battery voltage, the main relay is removed and the harness contacts to terminals 85 and 30 are checked using a probe. If the probe light does not light up on one or two contacts at once, then the network break is coming from them. If both contacts are working properly, then using a probe, connect the harness contacts to terminals 85 and 86 and the relay; a non-lit probe light in this case indicates an open circuit in the control circuit of the main relay or a malfunction of the controller itself. If the probe light comes on again, then the contacts of the harness block are connected using a jumper to terminals 30 and 87, after which they look at the test result in the diagnostic apparatus. In cases where the device shows a network voltage close to the battery voltage, the culprit of the error is an unreliable connection or a malfunction of the main relay. If the voltage still cannot be even closely compared with the battery voltage, then the cause of the error is faulty cables that connect the main relay to the controller contacts “X1.1/L3” and “X1.1/K3”, fuse F70 or the controller itself.

Possible reasons

The manual for VAZ cars directly states that the conditions for the formation of error 1602 are:

the ignition must be turned on;
The controller (ECU) has detected a loss of data in memory.

There are many reasons why error code p1602 is generated in the memory of the electronic control unit. Without going into details, first we will briefly list those components, assemblies and contacts, the failure of which can lead to a loss of voltage in the controller circuit and an ECU error. So:

Accumulator battery . There may be a bad contact (on the “plus” or “minus”), or simply a poorly charged battery. Alternatively, the battery capacity is not enough to power a large number of powerful electricity consumers (for example, an electric winch, a large amount of additional lighting). Also, such an error may occur when the battery was completely disconnected from the car (for example, the battery was replaced with a new one). Another option is an old and/or not fully charged battery; an error may occur when starting the engine on a discharged battery.
Car generator . There may be problems with the electrical power it produces, or loss of contacts on it. Including the loss of ground, which is a fairly common cause of error 1602 for the VAZ 2114, Priora and Kalina.
Alarm . Some car alarms, when the car is armed, forcibly disconnect the battery from the engine so that attackers cannot start the engine when opening the interior. “Smart” electronics regards this step as an error, forming it in the ECU memory.
Short-term voltage drop . The drop could be caused, for example, by starting the engine in severe frost, when a lot of energy from the battery was used to start the starter, and the ECU was left without electricity for a short time, which caused the corresponding error 1602 to be generated.
"Mass" of the ECU . This is a fairly common reason when the corresponding contact is oxidized or interrupted. In this case, the electronic control unit considers itself de-energized with all the ensuing consequences.
Ground connection between body and engine . The reason for this may be mechanical damage to the wire, oxidation of contacts, displacement or dismantling of the engine (during repairs or an accident).
Fuse box . Often the contacts on them oxidize, which causes a drop in the voltage going to the corresponding elements from the fuse-links. In addition, the problem may be in the block itself.
Electronic control unit . There may be a software or hardware failure. It is better to solve the problem in a car service center.

There are cases when, after self-flashing, the electronic control unit begins to fail and generate false errors, including 1602.

What could be the most common causes of errors on the Priora ECU?

The air or fuel filter may be clogged.
Someone tried to influence the controller firmware or simply change the program, which is generally not recommended, because unofficial software (the hardware itself, right down to the cable connectors, would also be better off if it were official) very often fools the owner, constantly crashes and refuses correctly work.
The type of fuel system was changed, but they forgot to reflash the controller, taking into account the changed parameters.
Low-quality gasoline can also lead to this error. In general, it can affect a good half of the automobile energy system and distort its operation, including the quiet life of the owner of a VAZ-2114.
Well, the main, favorite reason for many drivers is a system failure of the on-board computer itself. Or, perhaps, some sensor is faulty and is blatantly lying to you, annoying you with a constantly flashing message about P1602.

No one wants their car to suddenly stop at the most crucial moment and refuse to move, so we will try to overcome this problem together and make sure that these numbers do not return to the ECU monitor.

Elimination methods

Methods for eliminating error p1602 directly depend on the reason why it was formed in the memory of the electronic control unit. However, before performing the steps listed below, it makes sense to programmatically reset the error. If there are no visible breakdowns, then it is quite possible that the error “Court Controller, loss of supply voltage” was generated accidentally.

We list possible solutions to the problem in the same sequence as the reasons that caused them:

Error P1602 on VAZ 2110 engines: reasons, how to fix

Errors in the engine control system on VAZ cars equipped with injection engines of the tenth family (and this is almost the entire model range, starting with the VAZ 2110, Kalina, Priora...) are not as rare as we would like. Among them there are error codes that require immediate elimination and identification of causes, and there are those that appear from time to time. Among them, one of the leaders was error P1602. What the error code means, what it means and how to fix it, we’ll figure it out together.

Error P1602: what does it mean, decoding

The appearance of error code p1602 when scanning with a diagnostic device or during self-diagnosis using an on-board computer is a fairly common problem. Despite the fact that in the absence of other symptoms of malfunctions, you can use the car without problems, the message itself with error code P1602 begins to irritate. Especially when this has not been happening for the first month. Theoretically, error code 1602 stands for a message from the ECU about an interruption in the on-board network voltage. In practice, this means that in some place there is no contact on the terminals, plugs, connectors.

The message may also mean that one or more electrical devices on the on-board network may not have contact with ground, temporarily or permanently. Naturally, if the battery is not in full contact with the vehicle’s ground , we will not see any message, since the electrical equipment will simply die without signs of life. True, this happens extremely rarely, but it doesn’t hurt to remember it. As well as temporary problems with charging the battery , which can be associated both with the battery itself and with the charging relay, generator or their contacts.

Error p1602 VAZ Priora

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I recently had an error (I don’t remember the code) - Disappearance of on-board network voltage.
Probably it is. I haven't started resetting yet. what does this error mean?

The error occurs if you remove the terminal from the battery. Erase it and see if it appears again.

Can you recommend which board? put the computer. And how much do they cost anyway?

. cold start problems. This error appears when the battery is discharged and it’s time to retire.

that's what it looks like

The GF 412 range costs about 3500, it works not only as a BC but also controls the stove, very well located!

+1 It’s worth it exactly like this. Comfortable and pleasant. It just costs differently everywhere. I took it for 2800 rubles. I advise you to use white backlighting, not blue (unless it happens).

with a blue backlight it will hit your eyes hard, but with a white light it will be just right!

I have one, I bought it in Rus' for 1800 in the summer, I’m completely satisfied

What to do when error P1602 appears: DIY diagnostics

It is clear that with such an error code it is necessary to look for poor contact in the engine control system circuits. True, the direction of the search is not entirely clear and it depends on the symptoms. Therefore, we can only assume what can happen to the electrical system of a VAZ injection engine with error P1602, based on reviews from owners and personal experience:

No contact at the negative terminal of the battery. It's easy to check. We remove the terminal, assess its condition, if necessary, clean the terminal and terminal, and lubricate it with a special conductive lubricant with an anti-oxidative effect.
Lack of contact at the negative wire of the battery at the point of connection to the body . We unscrew the wire from the body, carefully clean the terminal and the attachment point, install the terminal in place, carefully screwing it into place with clean fasteners.
No contact on electronic control unit board . Here the situation is more complicated, since for diagnostics you need to have at least basic knowledge in the field of electronic systems and circuitry.

First, we inspect the ECU contacts, if necessary, clean them, as well as the terminals on the block. After this, you can open the block and visually inspect the board. If there is a loose solder on the board, solder it with a low-power soldering iron, being careful not to overheat the elements. In some cases, warming up the board with a hairdryer helps, but this is a temporary measure.
No contact on the generator . The contact may be damaged either on the power wire or on the signal wire. In both cases, the generator may not charge the battery.

Alternatively, you can remove the generator and check (clean) the contact of its housing with the cylinder block. In some cases this works.
In some cases, periodically power supply to the electronic control unit is lost engine. In these cases, either the fuse may be to blame (depending on the VAZ model, it may have different designations). We check the fuse, as well as the contacts of the mounting block.

P1602 loss of supply voltage to the Priora controller

Let's take a closer look at such an error as P1602, it means that the power to the ECU Electronic Control Unit is lost. I purchased this device for a couple of thousand rubles:

This is an on-board computer, it fits many cars. The cable for connecting it is included. It connects to an outlet located in the glove compartment. This on-board computer is capable of displaying numerous information about the car, fuel consumption, outside temperature, and, most importantly, errors. He immediately pointed out a faulty phase sensor. It is located under the hood and can be easily changed, although in a slightly vandal way. Here you can see one mounting bolt:

The second one is behind the phase sensor itself, there is no way to get to it. We unscrew the visible bolt, then prop it up with a screwdriver, breaking off the ear on the second bolt. After successfully replacing the phase sensor, this error disappeared, fuel consumption decreased significantly, until that moment it was 16-19 liters per 100 km. mileage, but a new error P1602 appeared. It signals to us that the power supply to the unit (Bosch 797) has failed. All masses were checked, everything under the hood is normal, the second mass is located under the foot air duct near the front passenger:

Messages 17

1 Topic by amakasoff 2016-05-14 19:58:27 (2016-05-14 19:58:53 edited by amakasoff)

amakasoff
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Registration: 2015-07-08
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Car: VAZ-21104

Topic: Resolved: Key won't start, starter won't turn. Error P1602

Hello. I encountered the following problem. The car (VAZ-21104, 1.6 l. 16 cl. engine 21124, ECU January 7.2) does not start with the key, the starter does not turn. I started it for a couple of days by bridging the contacts on the retractor. In this case, error p1602 hangs, loss of power to the controller. I thought the heels on the retractor were sticking, I took it apart, polished the heels, reassembled, the result was zero. I reset the controller, no effect. What else could it be? Ignition switch contact group? Signaling?

2 Reply from Sergey VAZ 2111 2016-05-14 20:58:18 (2016-05-15 00:05:13 edited by Sergey VAZ 2111)

Sergey VAZ 2111
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Registration: 2013-11-21
Messages: 513 Thanks : 145
Car: VAZ 2111

Re: Resolved: The key won't start, the starter won't turn. Error P1602

Egnition lock. Or the ignition switch relay. And error p1602 pops up when I disconnect the battery. So, either check the contacts on the battery and ecu.

3 Reply from “Robotron” 2016-05-14 21:23:04

"Robotron"
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Registration: 2015-11-22
Messages: 292 Thanks : 81
Car: VAZ - I turn it myself

Re: Resolved: The key won't start, the starter won't turn. Error P1602

amakasoff - try to start the car without keys (you will need to pull out the entire switch button). If it starts without keys, then the lock needs to be replaced. lada2111.rf/forum/viewtopic.php?id=2023

4 Reply from sergo9531 2016-05-14 23:22:39 (2016-05-15 22:25:37 edited by sergo9531)

sergo9531
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From: Domodedovo
Registration: 2014-01-12
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Re: Resolved: The key won't start, the starter won't turn. Error P1602

amakasoff , there are additional relays in the mounting block on top. One of them is responsible for the operation of the starter (I think it’s the one on the right, I don’t remember). Try installing something else first (for example, from ESP). If it works, change the relay. otherwise, jumper contacts 30 and 87 of the relay. If it works, the problem is either in the lock, its wiring, or the ECU. If not, the problem is in the wiring to the starter ( the underlined is not correct! ) I looked at the diagram (www.drive2.ru/l/5468943/ for those interested), it turned out that this is not entirely true. Judging by it, this relay opens the starter lock circuit. Accordingly, the actions are slightly different: 1) we bug (we bridge) contacts 30 and 87 of the starter relay and start the car - the starter works - the problem is in the control of the relay (broken wires or ECU). remove the bug. If not, then: 2) turn on the ignition, bridge contacts 30 and 50 of the ignition switch. If the starter works, the problem is in the lock. We remove the "bug". 3) otherwise, we look for a break in the wires or poor contact.

ps criticism is welcome)

5 Reply from Sergey VAZ 2111 2016-05-15 00:03:45

Sergey VAZ 2111
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Car: VAZ 2111

Re: Resolved: The key won't start, the starter won't turn. Error P1602

The ECU is not responsible for the starter. it has nothing to do with this situation

6 Reply from amakasoff 2016-05-15 08:55:38

amakasoff
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Registration: 2015-07-08
Messages: 9 Thanks : 2
Car: VAZ-21104

Re: Resolved: The key won't start, the starter won't turn. Error P1602

And if the ignition relay is faulty, the car will respond to the ignition key, i.e. will the devices come to life, but there will be no launch? Tell me am I right or wrong?

7 Reply from Patroclus 2016-05-15 09:00:33

Patroclus
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From: RUSSIA
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Car: Lada Priora 2171 Wagon: VESTA

Re: Resolved: The key won't start, the starter won't turn. Error P1602

Yes, the starter contacts are faulty

Added: 2016-05-15 09:00:33

8 Reply from amakasoff 2016-05-15 10:45:08

amakasoff
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Registration: 2015-07-08
Messages: 9 Thanks : 2
Car: VAZ-21104

Re: Resolved: The key won't start, the starter won't turn. Error P1602

Yes, the starter contacts are faulty

Added: 2016-05-15 09:00:33

How is this treated? And can it be treated at all?))) Without completely replacing the ignition switch

Added: 2016-05-15 13:45:08

I just checked the ignition relay, everything is fine.

9 Reply from sergo9531 2016-05-15 17:45:36 (2016-05-15 17:46:51 edited by sergo9531)

sergo9531
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