Window lifters on Nissan Sunny is one of those systems that seems simple until it stops working. You press a button, and the glass remains in place or moves jerkily. In some cases, the problem affects only one door, in others it affects all four at once. The reasons can be either trivial (blown fuse) or serious (malfunction of the electric motor or control unit).
In this article we will look at all possible reasons, according to which the window regulators are on Sunny (including models B13, B14, B15) may fail, and we will also give step-by-step instructions for diagnosis and repair. We will pay special attention typical mistakes of ownersthat aggravate the problem, and weβll tell you how to avoid costly repairs.
1. Fuses and relays: first check when power windows are not working
If the power windows stop working simultaneously on all doors, first check fuse. B Nissan Sunny The fuse is responsible for powering the system F30 (10A) in the mounting block under the steering wheel. On models B14/B15 it can be designated as F28 β check the diagram on the block cover. Burnout occurs due to a short circuit or overload, for example, if all the windows are raised at the same time.
Also check power window relay (usually R12 or R13). It is responsible for supplying voltage to the motors. Signs of a relay malfunction:
- The glass does not respond to the buttons, but the fuse is intact.
- You can hear a click when pressing, but there is no movement.
- The windows only work in one direction (for example, they only roll down).
- π§ How to check the fuse: remove it and inspect it in the light - the burnt thread will be visible. Replace with one of similar value.
- π How to check the relay: swap it with a known working one (for example, with a turn signal relay). If the windows work, the problem is in the relay.
- β‘ What to do if the fuse burns out repeatedly: look for a short circuit in the wiring or motors (more on this below).
β οΈ Attention: Never install a higher rated fuse (eg 15A instead of 10A). This may result in melted wiring or fire!
- Driver's license
- Front passenger
- Rear left
- Rear right
- On all doors
2. Electric motor malfunctions: when the glass moves jerkily or does not respond
If the fuses and relays are good, but the glass does not move or operates jerkily, the problem is most likely electric motor. B Nissan Sunny Window lift motors wear out over time due to:
- π Natural wear of brushes (resource - about 100,000 cycles).
- π§ Corrosion after moisture gets in (especially important for rear doors).
- π Winding break or short circuit inside the motor.
Motor diagnostics:
1. Remove the door trim (instructions below).
2. Disconnect the motor connector and apply 12V directly from the battery (polarity is not important - if the motor spins in one direction, swap the contacts).
3. If the motor does not respond, it is faulty. If it spins, but the glass does not move, the problem is mechanical (cable, guides).
Cost of a new motor for Sunny β from 1,500 to 4,000 rubles depending on the model. On B13 And B14 motors are interchangeable, but B15 may differ in connectors. A used motor can be found for 500β1,000 rubles, but the risk of repeated breakdown is high.
Before purchasing a new motor, check to see if the glass is jammed in the guides. Sometimes it is enough to lubricate the mechanism with silicone grease, and the problem disappears.
3. Problems with wiring and contacts: breakage, oxidation, short circuit
Wiring power windows Nissan Sunny passes through corrugation between the door and the body. Over time, the wires fray, oxidize or break. Symptoms of faulty wiring:
- π Glass only works when you press a button in a certain position.
- π The windows spontaneously lower or rise.
- π₯ The fuse burns out when trying to use the window regulator.
How to check wiring:
1. Remove the door trim and locate the wiring harness going into the body.
2. Check the integrity of the insulation - often the wires break at the base of the corrugation.
3. Using a multimeter, measure the resistance between the motor connector contacts and ground. If the resistance is close to 0 ohm - short circuit.
| Malfunction | Reason | How to fix |
|---|---|---|
| Glass does not work on one door | Wire break in corrugation | Replace or solder the wire, insulate |
| The windows only work when you press the up/down button | Oxidation of contacts in the motor connector | Clean contacts, treat with contact lubricant |
| Fuse burns out when used | Short circuit in motor or wiring | Test the circuit with a multimeter and replace the damaged section. |
β οΈ Attention: If you find melted insulation when checking your wiring, don't limit yourself to repairing one wire. The entire corrugation is probably damaged - replace it entirely to avoid re-circuiting.
4. Mechanical breakdowns: cables, guides, rollers
If the electric motor works, but the glass does not move or jams, the problem is mechanical part. B Nissan Sunny There are two types of window lifters used:
- π Cable (on most models) - the glass moves along guides using a cable and rollers.
- βοΈ Rack and pinion (less commonly) - the glass is attached to a rack.
Typical mechanical faults:
- Broken cable (the glass falls down and does not rise).
- Deformation of guides (the glass is crooked or jammed).
- Roller wear (the glass moves with difficulty, a grinding sound is heard).
How to diagnose:
1. Remove the door trim and inspect the mechanism.
2. Check the cable tension - if it is sagging, it needs to be replaced.
3. Make sure the guides are not bent and the rollers rotate freely.
Inspect the cable for breaks and stretching|
Check the glass fastening to the lift|
Lubricate the guides with silicone grease|
Turn the rollers manually - they should rotate without jamming
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On Sunny B14 models, plastic rollers often break - they can be replaced with metal analogues from the Nissan Primera P11 (article 80310-4M000).
5. Window control unit: when the problem is in the electronics
If the power windows do not work all doors, but the fuses and relays are good, the culprit may be control unit (aka master switch). It is located on the driver's door and is responsible for sending signals to the motors. Signs of its malfunction:
- π The glass does not respond to any button.
- π The buttons on the driver's door do not work, but on the passenger doors they do.
- π‘ The button backlight does not light up.
How to check a block:
1. Remove the driver's door trim.
2. Disconnect the unit connector and check for 12V on contacts 1 (food) And 2 (mass).
3. If there is power, but the unit does not work, replace it.
The cost of a new unit is from 3,000 to 6,000 rubles. You can find it at a disassembly site for 1,000β2,000 rubles, but before purchasing, check compatibility (on B13, B14, B15 the blocks are different!).
How to temporarily bypass a faulty control unit?
If the control unit is burned out and the glass is stuck in the lowered position, you can temporarily connect the motor directly to the battery via a button (for example, from an intercom). To do this:
1. Remove the door trim.
2. Disconnect the motor connector.
3. Connect the wires from the button to the motor contacts (polarity is not important).
4. Press the button and the glass will rise.
β οΈ This is a temporary solution! Do not use it constantly - you can burn the motor or wiring.
6. Do-it-yourself diagnostics and repair of power windows on a Nissan Sunny
To repair window regulators yourself, you will need:
- Screwdrivers (phillips, flat).
- Plastic spatulas for removing trim.
- Multimeter (to check voltage).
- Silicone grease (for the mechanism).
- Soldering iron (if you need to repair wiring).
Step-by-step instructions for removing the door trim:
1. Unscrew the self-tapping screw under the door opening handle (it is hidden under a plastic plug).
2. Remove the window handle (pry it up with a screwdriver and pull it up).
3. Carefully pry up the trim around the perimeter, starting from the bottom corner.
4. Disconnect the wire connectors (do not pull the wires!).
After removing the casing you will have access to the mechanism. If the problem is in the motor or cable, replace the faulty parts. If in the wiring, restore the circuit and insulate the connections.
Before assembling the door, be sure to check the operation of the window regulator! Make sure the glass moves smoothly and does not jam. If the problem remains after assembly, you will have to disassemble the door again.
7. When to contact service: complex cases and risks of self-repair
Not all power window failures can be repaired on your own. Contact the service if:
- π§ Can't find a reason after checking fuses, motors and wiring.
- π» The control unit needs to be re-flashed (relevant for Sunny B15 with CAN bus).
- π₯ The wiring is melted or the short circuit is repeated after repair.
- π The glass is stuck in the closed position, and you cannot lower it to access the mechanism.
The average cost of diagnostics in the service is 500β1,000 rubles. Repair will cost:
- Replacing the motor - 1,500β3,000 rubles (including labor).
- Wiring repair - 2,000β4,000 rubles.
- Replacement of the control unit - 3,000β5,000 rubles.
If you decide to repair it yourself, be careful:
- Do not use force when removing the trim - the plastic clips break easily.
- Do not connect the motor directly to the battery for a long time - it may overheat.
- Before work, disconnect the negative terminal of the battery to avoid short circuit.
What to do if glass falls inside the door?
If the cable breaks and the glass falls down, do not try to lift it by force - you may damage the guides. Proceed like this:
- Remove the door trim.
- Carefully lift the glass by hand and secure it with tape or tape.
- Replace the cable or the entire window lift mechanism.
- After installing the new cable, adjust the tension - the glass should move smoothly, without distortions.
Is it possible to drive with a broken window regulator?
Yes, but it's inconvenient and unsafe:
- In the rain, water will enter the cabin through the slightly open glass.
- In winter, snow and ice can damage the mechanism.
- Open glass increases the risk of theft.
If the glass is stuck in the closed position, there is no risk, but it is better not to delay repairs - over time, the problem may worsen.
Why do the power windows only work when the engine is running?
This is normal behavior for Nissan Sunny β the power window system is powered through a relay, which is activated when the ignition is turned on. If the windows do not work even with the engine running, check:
- Fuse F30 (or F28).
- Power window relay (R12/R13).
- Integrity of wiring from the ignition switch to the control unit.
How to lubricate the window lift mechanism?
For lubrication use silicone grease (not lithol or solid oil - they collect dust). Apply it to:
- Glass guides.
- Rollers and cables (if the mechanism is cable).
- Rack and pinion lift gears.
Do not overdo it - excess lubricant may flow down and contaminate the casing.
Where to buy spare parts for Nissan Sunny window regulators?
Spare parts can be found:
- In official dealerships (original, but expensive).
- On disassembly (cheaper, but check the condition).
- In online stores (for example, Exist.ru, Autodoc).
- In auto electrician stores (motors, cables, control units).
For Sunny B13/B14 analogues from Nissan Primera P10/P11 And Almera N15.