Nissan Almera N16 (2000–2006) is a reliable car, but even it is not immune to problems starting the engine. If your Almera refuses to start, there can be dozens of reasons - from a banal battery discharge to serious malfunctions of the fuel system or electronics. In this article we will analyze all possible reasonswhy Nissan Almera N16 won't start, and we'll also give step by step instructions for diagnostics and repair.

A special feature of this model is its sensitivity to the quality of fuel and electronics. For example, on Almera N16 with QG15DE and QG18DE engines, the ignition coil often fails, and on diesel versions (YD22DDTi) there are problems with the injection pump. We will not limit ourselves to general advice, but will give specific recommendations for each type of engine and year of manufacture.

1. Check the battery and electrical system

The first thing to exclude is eating problems. On Almera N16 The weak point is the generator (especially on cars older than 2003), which often undercharges the battery. If when you turn the key you can only hear relay clicks or the starter barely turns, either the battery or the contacts are to blame.

How to check:

  • 🔋 Terminal voltage (should be 12.6–14.4 V with the engine off and 13.8–14.5 V at idle).
  • 🔌 Terminal oxidation - clean them with sandpaper and lubricate them Litolom-24.
  • 🔧 Body weight — check the wire from the negative terminal to the body (often oxidizes under the mount).
  • ⚡ Fuses - on Almera N16 fuses are responsible for starting F10 (10A) And F20 (15A) in the block under the hood.

If the battery is discharged, but after “lighting up” the car starts and runs, the problem is in the generator or current leakage. Normal leakage current on Almera N16 - no more than 50 mA. If it’s higher, look for a “gluttonous” consumer (the radio or alarm system is often to blame).

⚠️ Attention: On Almera N16 with immobilizer Nats After disconnecting the battery, the key binding may be reset. To avoid problems, before removing the terminals, insert the key into the ignition and turn to ON.
📊 How often do you check the battery in Nissan Almera?
  • Once a month
  • Only when problems arise
  • Never
  • Other

2. Starter: why doesn’t it turn or click?

If, when you turn the key, the starter doesn't respond, clicks or turns too slowly - the problem may be in itself, the pull-in relay or the control circuit. On Almera N16 the starter often “dies” after 150–200 thousand kilometers.

Diagnostics:

  • 🔊 Clicks without scrolling — the solenoid relay is faulty or the contacts are burnt.
  • 🔄 The starter turns but does not engage — wear of the bendix or flywheel crown.
  • 🔌 Power check — there should be 12 V on the control wire (thin wire on the retractor) when you turn the key.

On Almera N16 with Automatic transmission the starter is blocked if the selector lever is not in position P or N. Check selector switch (located on the box) - it often oxidizes or breaks.

Symptom Probable Cause Repair method
Starter does not respond Open circuit, faulty relay Ring the wires, replace the relay K30 in the fuse box
Clicks, but doesn't turn The retractor contacts are burnt Disassemble the starter, clean or replace the retractor
Turns slowly Worn brushes or bearings Replacement of starter or repair with replacement of brushes

Check the voltage on the battery|Make sure the automatic transmission selector is in the P/N position|Ring the control wire on the solenoid relay|Remove the starter and check the bendix and brushes-->

3. Problems with the fuel system

If the starter turns, but the engine doesn't grasp - the fuel system is at fault. On Almera N16 with gasoline engines (QG15DE, QG18DE) most often fail:

  • ⛽ Fuel pump — does not pump gasoline (can you hear it running when you turn on the ignition?).
  • 🔥 Injectors - clogged or do not open (check with a multimeter).
  • 📉 Fuel pressure regulator - on Almera N16 It often “pours” after 100 thousand km.
  • 🚨 Crankshaft position sensor (CPS) - if faulty, the engine will not start.

On diesel Almera N16 (YD22DDTi) problems are more often associated with injection pump (high pressure fuel pump) or glow plugs. If the engine does not start when cold, but starts after warming up, the spark plugs or glow relay are to blame.

How to check the fuel system:

  1. Listen to whether the fuel pump is running when you turn on the ignition (you should hear a whirring sound in the tank).
  2. Check the pressure in the fuel rail (standard for QG18DE - 3.5–4 bar).
  3. Remove the chip from the injector and check the resistance (should be 12–16 ohms).
⚠️ Attention: On Almera N16 with GPL (gas equipment) the gas filter often becomes clogged or the reducer fails. If the car does not start on gas, but starts on gasoline, the problem is in the gas system, not in the engine.
How to check DPKV on Nissan Almera N16

The sensor resistance should be 550–750 Ohms (measured with a multimeter).

If the resistance is normal, check for metal shavings at the end of the sensor - its presence indicates wear of the crankshaft ring wheel.

4. Ignition system: spark plugs, coils, wires

On Almera N16 With gasoline engines, the ignition system is one of the most vulnerable points. Ignition coils (especially on QG18DE) often fail after 80–100 thousand km. Symptoms:

  • ⚡ The engine “troits” before stalling.
  • 🔥 The smell of gasoline from the exhaust (fuel does not burn).
  • 🚗 The car starts and immediately stalls.

How to diagnose:

  1. Unscrew the spark plugs - if they are wet, there is no spark.
  2. Check the resistance of the high-voltage wires (should be 4–10 kOhm).
  3. Replace the coils - if the problem moves to another cylinder, the coil is faulty.

On Almera N16 with GPL Spark plugs last 2–3 times less due to the higher gas combustion temperature. We recommend using iridium spark plugs (For example, NGK IFR6A11 or Denso IK16).

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If the engine does not start after washing under the hood, check for moisture in the fuse box and ignition coil connectors. Dry them with a hairdryer or compressed air.

5. Immobilizer and electronics

Nissan Almera N16 equipped with an immobilizer Nats, which often causes startup problems. If on the dashboard immo light flashing (key), but the engine does not start - the system does not recognize the key.

What to do:

  • 🔑 Try the second key (if available).
  • 🔄 Reset the immobilizer: remove the key, close the door, wait 10 minutes, then try again.
  • 📡 Check the immobilizer antenna (located around the ignition switch) - the contacts often oxidize.

If the problem is ECU (electronic control unit), then in addition to the lack of startup, there may be other symptoms:

  • 🚨 All the lights on the tidy are on.
  • 📉 The speedometer and tachometer needles “twitch”.
  • 🔌 Some sensors do not work (for example, Mass air flow sensor or DTOZH).

On Almera N16 The ECU is located under the glove compartment. If it is filled with antifreeze (the heater radiator is leaking) or is corroded, repair or replacement is required.

💡

If the immobilizer has blocked the start, and there is no spare key, you will have to contact an auto electrician to flash the ECU or bypass the immobilizer.

6. Sensors: DPKV, DMRV, DTOZH

On Nissan Almera N16 there are three sensors without which the engine won't start:

  1. DPKV (crankshaft position sensor) - if faulty, the ECU does not know when to give a spark.
  2. MAF (mass air flow sensor) - if the circuit is broken, the engine may not start.
  3. DTOZH (coolant temperature sensor) - if it shows incorrect data, the ECU is not adjusting the fuel mixture correctly.

How to check:

  • 🔧 DPKV — resistance 550–750 Ohms, voltage at the connector 0.5–1 V (when cranked with starter).
  • 💨 Mass air flow sensor — the voltage between contacts 1 and 3 should be 0.99–1.01 V (with the engine off).
  • 🌡️ DTOZH — resistance 2.3–3 kOhm at 20°C, 0.3 kOhm at 90°C.

If the sensor is faulty, replace it. On Almera N16 original sensors last longer than analogues, but are more expensive. For example, DPKV from Nissan (23731-4M000) will cost 3–4 thousand rubles, and an analogue will cost 800–1200 rubles.

7. Engine mechanical problems

If all systems are in order, but the engine doesn't grasp or jammed - mechanical problem. On Almera N16 most often found:

  • 🔗 Broken timing belt - if the belt breaks, the valves will bend (on QG18DE this is 100% probability).
  • 🛢️ Jammed oil pump — the engine does not turn over with the starter.
  • 🔥 Hydraulic compensators — if it’s jammed, the engine will knock and won’t start.

How to diagnose:

  • Try cranking the engine by hand (using the crankshaft pulley bolt). If it doesn’t spin, it jams.
  • Remove the timing cover and check the integrity of the belt.
  • Listen for any extraneous sounds when cranking the starter (knocking, grinding).
⚠️ Attention: If on Almera N16 with engine QG18DE If the timing belt breaks, then in addition to replacing the belt and valves, grinding the cylinder head is often required. The cost of repairs is from 30 thousand rubles.

8. YD22DDTi diesel engines: diagnostic features

Diesel Almera N16 (YD22DDTi) have their own “diseases”:

  • 🛢️ Fuel injection pump (high pressure fuel pump) — fails after 150–200 thousand km.
  • ⚡ Glow plugs — if they don’t work, the engine will not start “cold”.
  • 🔥 Injectors — clogged or “leaked” (checked at the stand).

Diagnostics of a diesel engine is more difficult than a gasoline engine. If Almera N16 won't start:

  1. Check fuel rail pressure (should be 250–300 bar).
  2. Make sure glow plugs work (checked with a multimeter or for a spark).
  3. Listen to the injection pump - if the pump does not make a characteristic buzzing sound, it is faulty.

On diesel Almera N16 often fails fuel shut-off valve (located on the injection pump). If it is stuck in the closed position, fuel does not flow into the ramp.

FAQ: Frequently asked questions about Nissan Almera N16

The car does not start after refueling. What to do?

Most likely, low-quality fuel got into the tank. Drain the gasoline, flush the fuel system, replace the fuel filter. On Almera N16 with QG18DE After bad gasoline, the injectors often become clogged - they need to be cleaned with ultrasound.

The starter turns, but the engine does not catch. What is the reason?

Check:

  1. Spark on the candles.
  2. Fuel rail pressure.
  3. DPKV and DMRV.
  4. If everything is in order, the timing may be out of whack (check the marks).
After washing the engine the car stopped starting. What to do?

Water may have gotten into the sensor connectors, ignition coils, or fuse box. Dry everything with a hairdryer, treat the contacts WD-40. Pay special attention to the ECU connector (under the glove compartment) - if water gets there, the unit may fail.

Immo flashes, but the key is original. How to reset?

Try:

  1. Disconnect the battery for 10 minutes.
  2. Insert the key and turn on the ignition for 10 minutes (the immo light should go out).
  3. If it doesn’t help, check the immobilizer antenna or flash the ECU.
The engine starts and immediately stalls. What's the matter?

Reasons:

  • Defective Mass air flow sensor or TPDZ.
  • Air leak in the intake manifold.
  • clogged catcollector (on QG18DE after 150 thousand km).
  • Defective idle air valve (cleaned with carb cleaner).