Removing the generator on a Nissan Note: complete instructions with nuances for E11 and E12

Dismantling the generator Nissan Note - a task that owners face when replacing brushes, bearings or the device itself due to wear. Despite the compact size of the car, access to the generator is complicated by attachments and cramped engine compartment space. In this article we will analyze step by step removal process taking into account the features of the models E11 (2004–2012) and E12 (2012–2020), and also tell you how to avoid common mistakes that lead to damage to the belt or electronics.

Difference Nissan Note from other brand models - in the location of the generator: it is attached to the engine block HR15DE (1.5 l) or HR16DE (1.6 l) and are driven by a belt from the crankshaft. If you notice whistle under the hood, dim headlights or signal CHARGE on the dashboard - these are direct signs of a malfunction. Before starting work, check the belt tension and the condition of the battery terminals: often the problem lies not in the generator, but in oxidized contacts.

Preparing for dismantling: tools and safety precautions

Before removing the generator Nissan Note, prepare your workspace and tools. The car must be parked flat surface with the handbrake on. Disconnect the negative terminal of the battery - this will prevent a short circuit when working with electrical wiring. Please note: on models with Start/Stop (if they were pre-restyling) you may need to reset the settings after turning off the power.

List of required tools:

• 🔧 Socket set (10 mm, 12 mm, 14 mm) with extension and ratchet
• 🔧 17 mm socket wrench (for pulley nut)
• 🔧 Screwdriver with flat and Phillips blade
• 🔧 Jack and stand (if you need to remove the right wheel for access)
• 🔧 Torque wrench (for proper tightening of bolts)
• 🔧 Puller for the generator pulley (optional if the pulley is stuck)

⚠️ Attention: Do not use an impact wrench to remove the alternator mounting bolts - this may damage the threads in the aluminum engine block. If the bolt does not budge, treat it with a penetrating lubricant (for example, WD-40) and wait 10–15 minutes.

Also prepare:

• 📦 Marker to mark the position of the belt (or take a photo of the tension diagram)
• 📦 New alternator belt (if you plan to replace, original art. 11720-4M000)
• 📦 Clean rags and solvent for cleaning seats

Alternator location diagram for Nissan Note E11/E12

Generator on Nissan Note located to the right of the engine (in the direction of travel), under the intake manifold. On models with air conditioning, access is complicated by the compressor, which will have to be temporarily moved or removed. Below is a diagram of the key elements:

element	Location	Note
Generator	Right side of the engine, under the intake manifold	Attaches with 2 bolts to the cylinder block
Tension roller	Above the generator, on the bracket	Adjusts belt tension
Air conditioning compressor	To the right of the generator	May require removal for access
Drive belt	Covers crankshaft, alternator, pump and compressor pulleys	Length ~1700 mm (for models with air conditioning)

On cars without air conditioning, the process is simplified - just loosen the tension roller and remove the belt. If there is an air conditioner, you will have to either remove its drive belt separately, or temporarily move the compressor to the side without disconnecting the lines (so as not to depressurize the system).

Step-by-step instructions for removing the generator

The algorithm of actions depends on the vehicle configuration. Below is a universal instruction for Nissan Note E11/E12 with air conditioning:

1. Release the belt tension. Turn the tension roller counterclockwise (use a 14 mm wrench). Secure the roller in the loose position by inserting a screwdriver into the hole in the housing.

2. Remove the belt. Carefully slide it off the alternator and crankshaft pulleys. If the belt is worn, do not try to save it - it may break when reinstalled.

3. Disconnect the electrical connectors. There are two contacts on the generator: a thick wire (“+” from the battery) and a voltage regulator connector. First, unclip the plastic connector retainer, then unscrew the nut securing the power wire (10 mm wrench).

4. Unscrew the mounting bolts. The generator is secured with two bolts:

   • 🔩 Bottom bolt (14 mm) - accessible from below; removal of engine protection may be required.
   • 🔩 Upper bolt (12 mm) - located on the intake manifold side.

Remove the generator. After unscrewing the bolts, carefully pull the device up, avoiding touching the radiator or pipes. If the pulley sticks, turn it slightly by hand.

Compare the part number on the old and new alternator (must match 23100-4M000 or 23100-4M005)

Check the pulley bearing - it should rotate without play or noise

Clean the seats on the engine block from dirt

Make sure that the new generator is equipped with a voltage regulator (if not, transfer it from the old one) -->

On models E12 (2012–2020) additional removal of the air duct or part of the plastic engine protection may be required. If the generator is stuck to the block, do not hit it with a hammer - use a puller or a wooden spacer.

⚠️ Attention: When disconnecting the power wire, do not pull on the wire itself - this may damage the terminal on the generator. Always unscrew the nut with a wrench while holding the bolt from the reverse side.

Common mistakes and how to avoid them

Even experienced craftsmen make mistakes when working with a generator. Nissan Note. Here are the most common of them:

• 🔧 Retightening of fastening bolts. The threads in the aluminum block are easily stripped. Use a torque wrench with force 25–30 Nm for the top bolt and 40–45 Nm for the bottom.
• 🔧 Incorrect belt tension. Weak tension leads to slipping and whistling, excessive tension leads to bearing wear. You can check the tension by pressing the belt between the pulleys: the deflection should be 8–10 mm.
• 🔧 They forget to disconnect the battery. This is fraught with a short circuit when the positive wire touches the body.
• 🔧 They confuse the polarity when connecting. If you confuse “+” and “–” on the voltage regulator, the generator will fail.

Critical error: ignoring the diode bridge check after removal. Even if the generator is apparently in good working order, a breakdown of the diodes may go unnoticed, which will lead to battery discharge or damage to the computer. To check the diode bridge, use a multimeter in the “test” mode:

• Connect the probes to the diode terminals (anode/cathode).
• The resistance must be infinite in one direction and 400–700 Ohm in another.
• If the readings are the same in both directions, the diode is broken.

How to check the generator without removing it?

Connect a multimeter to the battery terminals with the engine running (2000 rpm). The voltage must be in the range 13.8–14.5 V. If below 13 V — the generator undercharges, if higher 15 V - The voltage regulator is faulty.

Replacing brushes and bearings: when appropriate

It is not always necessary to completely replace the generator. If the problem is worn brushes or bearings, they can be replaced separately. The following symptoms indicate the need for repair:

• 🔊 Rumble or grinding noise on the generator side - a sign of bearing wear.
• 🔋 Periodic charging shutdown - brushes are often to blame.
• 💡 Lamp flickering CHARGE at idle speed.

To replace the brushes you will need to disassemble the generator. B Nissan Note brushes are used length 5–6 mm (new ones should be no shorter 8 mm). Bearings have numbers:

• Front (pulley side): 6202-2RS
• Rear (slip ring side): 6303-2RS

The cost of repairs in the service will cost 3–5 thousand rubles., while a new generator costs 12–18 thousand rubles. (original Nissan or high-quality analogues Denso, Mitsuba). If you are not confident in your skills, it is better to buy an assembled generator - saving on repairs may result in repeated breakdowns.

Installing the generator and adjusting the belt tension

Assembly is carried out in the reverse order, but there are several nuances:

1. Before installation, apply a thin layer copper grease on the bolt seats - this will prevent corrosion and facilitate future dismantling.

2. Tighten the fastening bolts criss-crossto avoid distortion of the generator housing.

3. When installing the belt, first put it on the crankshaft pulley, then on the alternator, pump and air conditioning compressor (if equipped).

4. Adjust the belt tension using the tension roller. After adjustment, check the tension by pressing the belt between the generator and crankshaft pulleys - the deflection should be 8–10 mm.

After installation, connect the battery and start the engine. Check:

• 🔋 The voltage at the battery terminals (should be 13.8–14.5 V at 2000 rpm).
• 🔊 No extraneous noise from the generator.
• 💡 Lamp going out CHARGE after launch.

⚠️ Attention: If the battery discharges quickly after replacing the alternator, check the leakage current. On Nissan Note it should not exceed 50 mA with the ignition off. Exceeding the norm indicates a short circuit in the circuit or a malfunction of the voltage regulator.

Alternative methods for diagnosing a generator

If you are not sure that the problem is with the generator, perform additional checks:

1. Checking the relay regulator. Disconnect the connector from the generator and measure the voltage on the regulator wire (usually red/black). When the engine is running it should be 12–14 V. No voltage indicates a faulty relay or open circuit.

2. Load test. Connect a powerful consumer (for example, high beam headlights) and measure the voltage on the battery. If it falls below 13 V, the generator cannot cope with the load.

3. Checking the windings. The field winding resistance (between the slip rings) should be 4–5 ohms. The resistance between the rings and the body is infinity (ground breakdown).

If the generator is working, but there is no charging, check:

• 🔌 fuse (usually 100A in the block under the hood, designated as ALT or GEN).
• 🔌 Power wire from the generator to the battery (may be damaged or oxidized).
• 🔌 Contacts on the ECU connector (oxidation or corrosion).

FAQ: Frequently asked questions about the Nissan Note generator

Is it possible to drive with a faulty generator?

Short term - yes, but only if the battery is fully charged. Without recharging from the generator, the battery will be discharged within 30–60 minutes (depending on the load: headlights, heating, music). Driving for a long time on the battery leads to deep discharge, which shortens its service life.

Which generator is better to choose for replacement: original or analogue?

Original generators Nissan (art. 23100-4M000) are reliable, but expensive. Good analogues:

• Denso (art. 210-0126) - high quality, compatible with HR15DE/HR16DE.
• Mitsuba (art. ALR0104) - often installed on a conveyor.
• Bosch (art. 0 986 041 940) is a budget option, but check the release date (old batches may be defective).

Avoid cheap Chinese brands - their resource rarely exceeds 30–50 thousand km.

What should I do if the belt whistles after replacing the generator?

A whistling sound indicates low tension or moisture/oil on the belt. Actions:

1. Check tension (deflection 8–10 mm).
2. Clean the pulleys and belt from dirt with alcohol or a special cleaner.
3. If the belt is old, replace it (recommended interval: 60–80 thousand km).
4. Check the alignment of the pulleys: if the generator is installed crookedly, the belt will slip and whistle.

Do I need to register a new generator in the ECU?

On Nissan Note before 2016 release (without system Start/Stop) no adaptation required. On newer models, it may be necessary to reset errors through a diagnostic scanner, but there is no need to “train” the generator - the ECU automatically adjusts the charging parameters.

How often should the generator be checked?

Recommended interval:

• 🔧 Visual inspection of the belt and fastenings - every 15 thousand km.
• 🔧 Check the charging voltage - once every 30 thousand km or when symptoms appear (whistles, flickering lamps).
• 🔧 Replacement of brushes - every 100–150 thousand km (or when worn to 5 mm).

Bearings and diode bridge serve 150–200 thousand km, but their condition depends on operating conditions (for example, frequent driving through puddles reduces the service life).