The situation when, in the midst of a rainstorm, the windshield cleaning system suddenly fails is one of the most stressful for the owner of a crossover. Nissan Qashqai. A sudden loss of visibility on the road not only creates an emergency situation, but can also lead to serious accidents. The problem can manifest itself in different ways: either the mechanism freezes in one position, or the brushes move jerkily, or the motor shows no signs of life at all.
The source of the problem can be either a simple blown fuse or a complex failure in the electronic control unit BCM. Many owners try to solve the problem themselves, but without understanding the electrical circuit Nissan You can make the situation worse by causing a short circuit or failure of more expensive components. In this material we will analyze in detail all the possible causes of windshield wiper failure on first and second generation models.
Main causes of windshield wiper system failure
The first thing that comes to mind when a malfunction is detected is the failure of the electric motor itself. However, repair statistics show that most often the problem lies in the electrical circuit or control electronics. Wiper motor Nissan Qashqai — the device is quite reliable, but it is vulnerable to overloads when the brushes become icy.
The second most common culprit is the relay or fuse that supplies power to the assembly. Depending on the year of manufacture and generation of the car, the location of these elements may differ, but the principle of operation remains the same. If the fuse is blown, it means that there is excessive current somewhere in the circuit.
The third, most insidious option is a malfunction of the contact group on the steering column or a malfunction in the body control module BCM (Body Control Module). It is this block that processes the signals from the switch and gives the command to the motor to work. In the event of a software failure or damaged contacts, the signal simply does not reach the actuator.
- ⚡ Fuse blown due to mechanism jamming
- ❄️ Icing of brushes and increased load on the motor
- 🔌 Oxidation of contacts in the motor or switch connector
- 💾 Software failure in the control unit BCM
⚠️ Attention: If, when you try to turn on the wipers, you hear a characteristic buzzing of the motor, but the brushes do not move, stop trying immediately. This is a sign of mechanical jamming, and further operation will burn out the motor windings.
Fuse and relay diagnostics
Troubleshooting should always begin by checking the electrical protection. On a crossover Nissan Qashqai The fuse box is located in the engine compartment. You will need to find a cover with a diagram or use service documentation to determine which fusible element is responsible for the wiper system.
Typically, a fuse marked F15 or WIP (depending on the year of manufacture and configuration). If the fuse is visually intact, but the circuit does not work, you need to check it with a multimeter in continuity mode. Sometimes the thread burns out inside the bulb, and this is not visible to the naked eye.
In addition to fuses, a relay may be present in the circuit. The windshield wiper relay is often integrated into the unit, but on some modifications it is located separately. If the relay clicks but the motor does not turn, the problem is most likely in the motor itself or the wiring. If there are no clicks, check the control signals.
☑️ Checking the electrical circuit
| Component | Location | Marking (example) | Symptom of malfunction |
|---|---|---|---|
| Wiper fuse | Engine compartment block | F15 / 20A |
The wipers don't work at all |
| Washer motor fuse | Engine compartment block | F16 / 15A |
No water splashing, wipers work |
| Wiper relay | Fuse box | Relay 5-pin | No sound of the motor running, no clicks |
| Geared motor | Under the hood near the windshield | Electric motor | Humming noise with no movement or silence |
⚠️ Attention: Never install a fuse with a higher rating than specified in the instructions. Using a 30A fuse instead of a 20A fuse may cause the wiring to catch fire if there is a short circuit.
Checking and replacing the windshield wiper motor
If the electrical circuit is OK, voltage comes to the connector, but the motor does not rotate, the problem lies in the unit itself. Windshield wiper motor Nissan Qashqai has a built-in gearbox and limit switch. Over time, the plastic gears of the gearbox can wear out or crack, especially if you frequently use the windshield wipers on dry glass.
A common problem is jamming of the motor shaft due to moisture and dirt getting into the housing. Moisture causes bearing corrosion, which increases friction. The motor tries to turn, but there is not enough current to overcome the resistance, and it simply hums or stops.
To check the motor, it must be removed from its mounts. Unscrew the plastic cover (trapezoid) and disconnect the power connector. When direct 12 Volt power is supplied from the battery to the motor contacts, it should work. If there is no reaction, the unit must be replaced. Often, replacing only the plastic gear of the gearbox is a more cost-effective solution than buying a new motor assembly.
- 🔧 Remove the plastic trim (trapezoid) of the wipers
- 🔩 Unscrew the nuts securing the motor to the body
- 🔌 Disconnect the electrical connector
- 🧪 Check the operation of the motor directly from the battery
How to disassemble the wiper motor?
To replace the gears, you must carefully disassemble the motor housing. Often the lid is held on by rivets that need to be drilled out. Inside you will find a plastic gearbox and metal gears. Replace the worn gears with new ones (repair kits can be found) and reassemble the body by riveting it again.
⚠️ Attention: When disassembling the motor, be extremely careful with the springs and small parts of the gearbox. The loss of one gear will make the motor irreparable.
Switch and wiring faults
Sometimes the problem lies not in the motor, but in the way you command it to turn on. Steering column wiper switch Nissan Qashqai - a complex unit with many contacts. Over time, the contacts oxidize or burn due to the switching of high currents.
If the wipers only work at certain speeds or periodically go off when you press the lever, this is a sure sign of poor contact in the switch. The cause may also be damage to the wiring in the corrugation between the door and the body, if the problem concerns the rear wiper, or in the steering column.
For diagnostics, you need to use a multimeter and a wiring diagram. Check whether the signal arrives at the control unit when the lever is turned. If there is a signal, but there is no reaction, the problem is in the block. If there is no signal, change the switch or repair the wiring.
- 📉 Oxidation of contacts inside the switch handle
- 🔌 Broken wires in the bend of the steering column
- 🔥 Burning of tracks on the switch board
- Don't work at all
- Only work at one speed
- Work in jerks
- They work, but do not stop in the starting position
Problems with trapezoid and mechanical part
Even a working motor will not be able to work if the mechanical part - the trapezoid - is jammed. Windshield wiper trapezoid Nissan Qashqai consists of several rods and levers connected by hinges. These joints are often subject to corrosion and become clogged with dirt.
In winter, the hinges can freeze to the body, and when you turn on the wipers, there is a huge load that can burn the motor or blow a fuse. It is also possible that the plastic bushings may chip, causing the rods to begin to dangle and rub against each other.
You can check the condition of the trapezoid by removing the wiper arms and pressing the power button with the motor disconnected (or simply moving the mechanism with your hands). The mechanism should move easily and smoothly. If there are jams, it is necessary to lubricate the hinges or replace worn bushings.
Regular lubrication of the wiper trapezoid hinges in winter can prevent jamming and failure of the electric motor.
Role of the Body Control Module (BCM)
Modern crossovers Nissan built on complex electronics, where the unit is responsible for the operation of many components BCM. This module controls not only the light, but also the windshield wipers. If a software failure or damage to the power keys occurs in the unit, the wipers may stop working.
Sometimes it is enough to reflash the control unit or reset errors through a diagnostic scanner. However, if the transistors supplying power to the motor burn out inside the module, a complex board repair or complete replacement of the unit will be required.
Especially often problems with BCM occur after poor-quality electrical repairs or moisture entering the interior. If the wipers operate jerkily, turn on spontaneously, or do not stop in the park position, this is a clear sign of a malfunction in the control electronics.
- 🖥️ Software block failure BCM
- ⚡ Failure of power switches in the unit
- 💧 Moisture entering the electronic module housing
- 🔌 Errors in the CAN bus system
Before replacing the BCM, be sure to copy its settings and coding on the diagnostic equipment, otherwise the new unit may not work or require complex adaptation.
Step-by-step instructions for diagnostics and repair
To troubleshoot the problem yourself, follow the algorithm. Start with a visual inspection and checking the fuses. If the fuse is intact, proceed to checking the voltage at the motor connector with the ignition on and the wipers activated.
If there is voltage, but the motor does not turn, remove it and check it separately. If there is no voltage, check the circuit from the control unit to the motor and the condition of the switch. If you suspect a block BCM It is better to contact specialists with a diagnostic scanner.
After eliminating the cause, be sure to check the operation of the mechanism in different modes: single wipe, constant mode, washer mode and pause mode. Make sure the wipers stop correctly at the bottom of the glass.
Проверка цепи:1. Включите зажигание (IG1).
2. Переведите рычаг в режим WASH.
3. Измерьте напряжение на разъеме мотора (красный провод +).
4. Если 12В есть — проблема в моторе.
5. Если 0В — проблема в цепи управления.
- 🔍 Inspect the fuses under the hood
- 📏 Measure the voltage with a multimeter
- 🔨 Remove and check the motor
- 🔌 Inspect the connectors and wiring
FAQ: Frequently asked questions
Why do the wipers only work at one speed?
This may be due to a faulty switch on the steering column or damage to the contact group inside the motor itself. In some cases, the problem can be solved by cleaning the switch contacts.
What to do if the wipers do not return to their original position?
Most likely, the limit switch inside the wiper motor is faulty or the plastic drive gear is broken. The motor gearbox requires disassembly and repair.
Is it possible to replace just the gear in the wiper motor?
Yes, this is a common practice. There are repair kits with plastic gears. This is much cheaper than buying a new motor assembly, but requires disassembly skills.
Why does the wiper fuse burn out immediately after replacement?
This indicates a short circuit in the circuit or a jammed trapezoid mechanism. You can’t just change the fuse; you need to find and eliminate the cause of the overload, otherwise you can burn the wiring.
Does the weather affect the performance of the wipers? Nissan Qashqai?
Yes, low temperatures can cause the brushes and trapeze to ice up, which puts stress on the motor. In winter, always freeze the wipers before turning them on to avoid damage.